Articles | Volume 16, issue 3
https://doi.org/10.5194/cp-16-1061-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-16-1061-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Jun 2020
Research article |
| 18 Jun 2020
| 18 Jun 2020
The importance of input data quality and quantity in climate field reconstructions – results from the assimilation of various tree-ring collections
Institute of Geography, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern,
Bern, Switzerland
Veronika Valler
Institute of Geography, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern,
Bern, Switzerland
Stefan Brönnimann
Institute of Geography, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern,
Bern, Switzerland
Raphael Neukom
Institute of Geography, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern,
Bern, Switzerland
Department of Geography, University of Zurich, Zurich, Switzerland
Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Fernando Jaume-Santero
Department of Earth Physics and Astrophysics, Universidad Complutense de Madrid, Madrid, Spain
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Marcelo Zamuriano, Paul Froidevaux, Isabel Moreno, Mathias Vuille, and Stefan Brönnimann
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2019-286, https://doi.org/10.5194/nhess-2019-286, 2019
Publication in NHESS not foreseen
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Clim. Past, 15, 1485–1501, https://doi.org/10.5194/cp-15-1485-2019, https://doi.org/10.5194/cp-15-1485-2019, 2019
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During the 19th century flood frequency was high in central Europe, but it was low in the mid-20th century. This paper tracks these decadal changes in flood frequency for the case of Switzerland from peak discharge data back to precipitation data and daily weather reconstructions. We find an increased frequency in flood-prone weather types during large parts of the 19th century and decreased frequency in the mid-20th century. Sea-surface temperature anomalies can only explain a small part of it.
Lucas Pfister, Franziska Hupfer, Yuri Brugnara, Lukas Munz, Leonie Villiger, Lukas Meyer, Mikhaël Schwander, Francesco Alessandro Isotta, Christian Rohr, and Stefan Brönnimann
Clim. Past, 15, 1345–1361, https://doi.org/10.5194/cp-15-1345-2019, https://doi.org/10.5194/cp-15-1345-2019, 2019
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The 18th and early 19th centuries saw pronounced climatic variations with impacts on the environment and society. Although instrumental meteorological data for that period exist, only a small fraction has been the subject of research. This study provides an overview of early instrumental meteorological records in Switzerland resulting from an archive survey and demonstrates the great potential of such data. It is accompanied by the online publication of the imaged data series and metadata.
Francisco José Cuesta-Valero, Almudena García-García, Hugo Beltrami, Eduardo Zorita, and Fernando Jaume-Santero
Clim. Past, 15, 1099–1111, https://doi.org/10.5194/cp-15-1099-2019, https://doi.org/10.5194/cp-15-1099-2019, 2019
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A database of North American long-term ground surface temperatures, from approximately 1300 CE to 1700 CE, was assembled from geothermal data. These temperatures are useful for studying the future stability of permafrost, as well as for evaluating simulations of preindustrial climate that may help to improve estimates of climate models’ equilibrium climate sensitivity. The database will be made available to the climate science community.
Anne Klosterhalfen, Alexander Graf, Nicolas Brüggemann, Clemens Drüe, Odilia Esser, María P. González-Dugo, Günther Heinemann, Cor M. J. Jacobs, Matthias Mauder, Arnold F. Moene, Patrizia Ney, Thomas Pütz, Corinna Rebmann, Mario Ramos Rodríguez, Todd M. Scanlon, Marius Schmidt, Rainer Steinbrecher, Christoph K. Thomas, Veronika Valler, Matthias J. Zeeman, and Harry Vereecken
Biogeosciences, 16, 1111–1132, https://doi.org/10.5194/bg-16-1111-2019, https://doi.org/10.5194/bg-16-1111-2019, 2019
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To obtain magnitudes of flux components of H2O and CO2 (e.g., transpiration, soil respiration), we applied source partitioning approaches after Scanlon and Kustas (2010) and after Thomas et al. (2008) to high-frequency eddy covariance measurements of 12 study sites covering various ecosystems (croplands, grasslands, and forests) in different climatic regions. We analyzed the interrelations among turbulence, site characteristics, and the performance of both partitioning methods.
Marcelo Zamuriano, Andrey Martynov, Luca Panziera, and Stefan Brönnimann
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2019-27, https://doi.org/10.5194/nhess-2019-27, 2019
Publication in NHESS not foreseen
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This work investigates the formation of a hailstorm over the Tropical Bolivian Andes. Using the WRF atmospheric model, we are able to numerically reconstruct it and we assess the main factors (mountains, lake and surface heating) in the storm formation. We propose physical mechanisms that have the potential to improve the forecasting of similar events; which are known to have a big impact over the Bolivian Altiplano, especially the region near Titicaca lake.
Peter Stucki, Moritz Bandhauer, Ulla Heikkilä, Ole Rössler, Massimiliano Zappa, Lucas Pfister, Melanie Salvisberg, Paul Froidevaux, Olivia Martius, Luca Panziera, and Stefan Brönnimann
Nat. Hazards Earth Syst. Sci., 18, 2717–2739, https://doi.org/10.5194/nhess-18-2717-2018, https://doi.org/10.5194/nhess-18-2717-2018, 2018
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A catastrophic flood south of the Alps in 1868 is assessed using documents and the earliest example of high-resolution weather simulation. Simulated weather dynamics agree well with observations and damage reports. Simulated peak water levels are biased. Low forest cover did not cause the flood, but such a paradigm was used to justify afforestation. Supported by historical methods, such numerical simulations allow weather events from past centuries to be used for modern hazard and risk analyses.
Stefan Brönnimann, Jan Rajczak, Erich M. Fischer, Christoph C. Raible, Marco Rohrer, and Christoph Schär
Nat. Hazards Earth Syst. Sci., 18, 2047–2056, https://doi.org/10.5194/nhess-18-2047-2018, https://doi.org/10.5194/nhess-18-2047-2018, 2018
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Heavy precipitation events in Switzerland are expected to become more intense, but the seasonality also changes. Analysing a large set of model simulations, we find that annual maximum rainfall events become less frequent in late summer and more frequent in early summer and early autumn. The seasonality shift is arguably related to summer drying. Results suggest that changes in the seasonal cycle need to be accounted for when preparing for moderately extreme precipitation events.
Stefan Hunziker, Stefan Brönnimann, Juan Calle, Isabel Moreno, Marcos Andrade, Laura Ticona, Adrian Huerta, and Waldo Lavado-Casimiro
Clim. Past, 14, 1–20, https://doi.org/10.5194/cp-14-1-2018, https://doi.org/10.5194/cp-14-1-2018, 2018
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Many data quality problems occurring in manned weather station observations are hardly detected with common data quality control methods. We investigated the effects of undetected data quality issues and found that they may reduce the correlation coefficients of station pairs, deteriorate the performance of data homogenization methods, increase the spread of individual station trends, and significantly bias regional trends. Applying adequate quality control approaches is of utmost importance.
Mikhaël Schwander, Marco Rohrer, Stefan Brönnimann, and Abdul Malik
Clim. Past, 13, 1199–1212, https://doi.org/10.5194/cp-13-1199-2017, https://doi.org/10.5194/cp-13-1199-2017, 2017
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We used a new classification of daily weather patterns to analyse the influence of solar variability (11-year cycle) on European climate from 1763 to 2009. The analysis of the weather patterns occurrences shows a reduction in the number of days with a westerly flow over Europe under low solar activity during late winter. In parallel, the number of days with an easterly flow increases. Based on these results we expect colder winter over Europe under low solar activity.
Martin Wegmann, Yvan Orsolini, Emanuel Dutra, Olga Bulygina, Alexander Sterin, and Stefan Brönnimann
The Cryosphere, 11, 923–935, https://doi.org/10.5194/tc-11-923-2017, https://doi.org/10.5194/tc-11-923-2017, 2017
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We investigate long-term climate reanalyses datasets to infer their quality in reproducing snow depth values compared to in situ measured data from meteorological stations that go back to 1900. We found that the long-term reanalyses do a good job in reproducing snow depths but have some questionable snow states early in the 20th century. Thus, with care, climate reanalyses can be a valuable tool to investigate spatial snow evolution in global warming and climate change studies.
Stefan Brönnimann, Abdul Malik, Alexander Stickler, Martin Wegmann, Christoph C. Raible, Stefan Muthers, Julien Anet, Eugene Rozanov, and Werner Schmutz
Atmos. Chem. Phys., 16, 15529–15543, https://doi.org/10.5194/acp-16-15529-2016, https://doi.org/10.5194/acp-16-15529-2016, 2016
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The Quasi-Biennial Oscillation is a wind oscillation in the equatorial stratosphere. Effects on climate have been found, which is relevant for seasonal forecasts. However, up to now only relatively short records were available, and even within these the climate imprints were intermittent. Here we analyze a 108-year long reconstruction as well as four 405-year long simulations. We confirm most of the claimed QBO effects on climate, but they are small, which explains apparently variable effects.
Chantal Camenisch, Kathrin M. Keller, Melanie Salvisberg, Benjamin Amann, Martin Bauch, Sandro Blumer, Rudolf Brázdil, Stefan Brönnimann, Ulf Büntgen, Bruce M. S. Campbell, Laura Fernández-Donado, Dominik Fleitmann, Rüdiger Glaser, Fidel González-Rouco, Martin Grosjean, Richard C. Hoffmann, Heli Huhtamaa, Fortunat Joos, Andrea Kiss, Oldřich Kotyza, Flavio Lehner, Jürg Luterbacher, Nicolas Maughan, Raphael Neukom, Theresa Novy, Kathleen Pribyl, Christoph C. Raible, Dirk Riemann, Maximilian Schuh, Philip Slavin, Johannes P. Werner, and Oliver Wetter
Clim. Past, 12, 2107–2126, https://doi.org/10.5194/cp-12-2107-2016, https://doi.org/10.5194/cp-12-2107-2016, 2016
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Throughout the last millennium, several cold periods occurred which affected humanity. Here, we investigate an exceptionally cold decade during the 15th century. The cold conditions challenged the food production and led to increasing food prices and a famine in parts of Europe. In contrast to periods such as the “Year Without Summer” after the eruption of Tambora, these extreme climatic conditions seem to have occurred by chance and in relation to the internal variability of the climate system.
Imke K. Schäfer, Verena Lanny, Jörg Franke, Timothy I. Eglinton, Michael Zech, Barbora Vysloužilová, and Roland Zech
SOIL, 2, 551–564, https://doi.org/10.5194/soil-2-551-2016, https://doi.org/10.5194/soil-2-551-2016, 2016
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For this study we systematically investigated the molecular pattern of leaf waxes in litter and topsoils along a European transect to assess their potential for palaeoenvironmental reconstruction. Our results show that leaf wax patterns depend on the type of vegetation. The vegetation signal is not only found in the litter; it can also be preserved to some degree in the topsoil.
Philip Brohan, Gilbert P. Compo, Stefan Brönnimann, Robert J. Allan, Renate Auchmann, Yuri Brugnara, Prashant D. Sardeshmukh, and Jeffrey S. Whitaker
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-78, https://doi.org/10.5194/cp-2016-78, 2016
Preprint withdrawn
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We have used modern weather forecasting tools to reconstruct the dreadful European weather of 200 years ago – 1816 was the ‘year without a summer’; harvests failed, and people starved. We can show that 1816’s extreme climate was caused by the eruption of the Tambora volcano the previous year. This means we have some chance of predicting such extreme summers if they occur in future, though this is still a challenge to today’s forecast models.
Juhani Rinne, Mikko Alestalo, and Jörg Franke
Clim. Past Discuss., https://doi.org/10.5194/cp-2016-27, https://doi.org/10.5194/cp-2016-27, 2016
Revised manuscript not accepted
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The climate reconstructions derived from tree rings tend to show erroneous long-term oscillations. The aim of our paper is to describe the phenomenon and to uncover its reasons. In order to derive formulae describing the long-term error, the dependence of the tree rings on the age is not used in the reconstruction. The erroneous oscillations turn out to be due to data paucities over the years. Accordingly, such long-term errors can be present in any tree ring analysis with such paucities.
Y. Brugnara, R. Auchmann, S. Brönnimann, R. J. Allan, I. Auer, M. Barriendos, H. Bergström, J. Bhend, R. Brázdil, G. P. Compo, R. C. Cornes, F. Dominguez-Castro, A. F. V. van Engelen, J. Filipiak, J. Holopainen, S. Jourdain, M. Kunz, J. Luterbacher, M. Maugeri, L. Mercalli, A. Moberg, C. J. Mock, G. Pichard, L. Řezníčková, G. van der Schrier, V. Slonosky, Z. Ustrnul, M. A. Valente, A. Wypych, and X. Yin
Clim. Past, 11, 1027–1047, https://doi.org/10.5194/cp-11-1027-2015, https://doi.org/10.5194/cp-11-1027-2015, 2015
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A data set of instrumental pressure and temperature observations for the early instrumental period (before ca. 1850) is described. This is the result of a digitisation effort involving the period immediately after the eruption of Mount Tambora in 1815, combined with the collection of already available sub-daily time series. The highest data availability is therefore for the years 1815 to 1817. An analysis of pressure variability and of case studies in Europe is performed for that period.
P. Stucki, S. Brönnimann, O. Martius, C. Welker, M. Imhof, N. von Wattenwyl, and N. Philipp
Nat. Hazards Earth Syst. Sci., 14, 2867–2882, https://doi.org/10.5194/nhess-14-2867-2014, https://doi.org/10.5194/nhess-14-2867-2014, 2014
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This catalog contains 240 (8 extreme) high-impact windstorms in Switzerland since 1859 in 3 severity classes. Validation with independent wind and damage data reveals that the most hazardous winter storms are captured, while too few moderate windstorms may be detected. We find evidence of high winter storm activity in the early and late 20th century compared to the mid-20th century in both damage and wind data. This indicates a covariability of hazard and related damages on decadal timescales.
K. Willett, C. Williams, I. T. Jolliffe, R. Lund, L. V. Alexander, S. Brönnimann, L. A. Vincent, S. Easterbrook, V. K. C. Venema, D. Berry, R. E. Warren, G. Lopardo, R. Auchmann, E. Aguilar, M. J. Menne, C. Gallagher, Z. Hausfather, T. Thorarinsdottir, and P. W. Thorne
Geosci. Instrum. Method. Data Syst., 3, 187–200, https://doi.org/10.5194/gi-3-187-2014, https://doi.org/10.5194/gi-3-187-2014, 2014
S. Muthers, J. G. Anet, A. Stenke, C. C. Raible, E. Rozanov, S. Brönnimann, T. Peter, F. X. Arfeuille, A. I. Shapiro, J. Beer, F. Steinhilber, Y. Brugnara, and W. Schmutz
Geosci. Model Dev., 7, 2157–2179, https://doi.org/10.5194/gmd-7-2157-2014, https://doi.org/10.5194/gmd-7-2157-2014, 2014
I. Mariani, A. Eichler, T. M. Jenk, S. Brönnimann, R. Auchmann, M. C. Leuenberger, and M. Schwikowski
Clim. Past, 10, 1093–1108, https://doi.org/10.5194/cp-10-1093-2014, https://doi.org/10.5194/cp-10-1093-2014, 2014
L. Ramella Pralungo, L. Haimberger, A. Stickler, and S. Brönnimann
Earth Syst. Sci. Data, 6, 185–200, https://doi.org/10.5194/essd-6-185-2014, https://doi.org/10.5194/essd-6-185-2014, 2014
J. G. Anet, S. Muthers, E. V. Rozanov, C. C. Raible, A. Stenke, A. I. Shapiro, S. Brönnimann, F. Arfeuille, Y. Brugnara, J. Beer, F. Steinhilber, W. Schmutz, and T. Peter
Clim. Past, 10, 921–938, https://doi.org/10.5194/cp-10-921-2014, https://doi.org/10.5194/cp-10-921-2014, 2014
P. Breitenmoser, S. Brönnimann, and D. Frank
Clim. Past, 10, 437–449, https://doi.org/10.5194/cp-10-437-2014, https://doi.org/10.5194/cp-10-437-2014, 2014
F. Arfeuille, D. Weisenstein, H. Mack, E. Rozanov, T. Peter, and S. Brönnimann
Clim. Past, 10, 359–375, https://doi.org/10.5194/cp-10-359-2014, https://doi.org/10.5194/cp-10-359-2014, 2014
A. Stickler, S. Brönnimann, S. Jourdain, E. Roucaute, A. Sterin, D. Nikolaev, M. A. Valente, R. Wartenburger, H. Hersbach, L. Ramella-Pralungo, and D. Dee
Earth Syst. Sci. Data, 6, 29–48, https://doi.org/10.5194/essd-6-29-2014, https://doi.org/10.5194/essd-6-29-2014, 2014
F. Arfeuille, B. P. Luo, P. Heckendorn, D. Weisenstein, J. X. Sheng, E. Rozanov, M. Schraner, S. Brönnimann, L. W. Thomason, and T. Peter
Atmos. Chem. Phys., 13, 11221–11234, https://doi.org/10.5194/acp-13-11221-2013, https://doi.org/10.5194/acp-13-11221-2013, 2013
J. G. Anet, S. Muthers, E. Rozanov, C. C. Raible, T. Peter, A. Stenke, A. I. Shapiro, J. Beer, F. Steinhilber, S. Brönnimann, F. Arfeuille, Y. Brugnara, and W. Schmutz
Atmos. Chem. Phys., 13, 10951–10967, https://doi.org/10.5194/acp-13-10951-2013, https://doi.org/10.5194/acp-13-10951-2013, 2013
A. Stenke, C. R. Hoyle, B. Luo, E. Rozanov, J. Gröbner, L. Maag, S. Brönnimann, and T. Peter
Atmos. Chem. Phys., 13, 9713–9729, https://doi.org/10.5194/acp-13-9713-2013, https://doi.org/10.5194/acp-13-9713-2013, 2013
S. Brönnimann, J. Bhend, J. Franke, S. Flückiger, A. M. Fischer, R. Bleisch, G. Bodeker, B. Hassler, E. Rozanov, and M. Schraner
Atmos. Chem. Phys., 13, 9623–9639, https://doi.org/10.5194/acp-13-9623-2013, https://doi.org/10.5194/acp-13-9623-2013, 2013
S. Brönnimann, I. Mariani, M. Schwikowski, R. Auchmann, and A. Eichler
Clim. Past, 9, 2013–2022, https://doi.org/10.5194/cp-9-2013-2013, https://doi.org/10.5194/cp-9-2013-2013, 2013
Y. Brugnara, S. Brönnimann, J. Luterbacher, and E. Rozanov
Atmos. Chem. Phys., 13, 6275–6288, https://doi.org/10.5194/acp-13-6275-2013, https://doi.org/10.5194/acp-13-6275-2013, 2013
Related subject area
Subject: Atmospheric Dynamics | Archive: Historical Records | Timescale: Instrumental Period
Air temperature changes in SW Greenland in the second half of the 18th century
Early 20th century Southern Hemisphere cooling
Precipitation reconstructions for Paris based on the observations by Louis Morin, 1665–1713 CE
Earliest meteorological readings in San Fernando (Cádiz, Spain, 1799–1813)
The weather diaries of the Kirch family: Leipzig, Guben, and Berlin (1677–1774)
Quantifying the contribution of forcing and three prominent modes of variability to historical climate
A 258-year-long data set of temperature and precipitation fields for Switzerland since 1763
Statistical reconstruction of daily temperature and sea level pressure in Europe for the severe winter 1788/89
Insights from 20 years of temperature parallel measurements in Mauritius around the turn of the 20th century
Unlocking weather observations from the Societas Meteorologica Palatina (1781–1792)
The 1921 European drought: impacts, reconstruction and drivers
Reconstruction of the track and a simulation of the storm surge associated with the calamitous typhoon affecting the Pearl River Estuary in September 1874
Early instrumental meteorological measurements in Switzerland
The "dirty weather" diaries of Reverend Richard Davis: insights about early colonial-era meteorology and climate variability for northern New Zealand, 1839–1851
A collection of sub-daily pressure and temperature observations for the early instrumental period with a focus on the "year without a summer" 1816
East Asian Monsoon controls on the inter-annual variability in precipitation isotope ratio in Japan
Investigating uncertainties in global gridded datasets of climate extremes
HadISDH land surface multi-variable humidity and temperature record for climate monitoring
Pairwise homogeneity assessment of HadISD
Ensemble meteorological reconstruction using circulation analogues of 1781–1785
HadISDH: an updateable land surface specific humidity product for climate monitoring
Reconstruction of high resolution atmospheric fields for Northern Europe using analog-upscaling
Early Portuguese meteorological measurements (18th century)
Extreme climate, not extreme weather: the summer of 1816 in Geneva, Switzerland
Inferences on weather extremes and weather-related disasters: a review of statistical methods
Benchmarking homogenization algorithms for monthly data
The construction of a Central Netherlands temperature
Early ship-based upper-air data and comparison with the Twentieth Century Reanalysis
The influence of the circulation on surface temperature and precipitation patterns over Europe
Rajmund Przybylak, Garima Singh, Przemysław Wyszyński, Andrzej Araźny, and Konrad Chmist
Clim. Past, 20, 1451–1470, https://doi.org/10.5194/cp-20-1451-2024, https://doi.org/10.5194/cp-20-1451-2024, 2024
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The purpose of this study is to recognise the nature of the climate in historical times (second half of 18th century) in Greenland. Such knowledge is important for validating Greenland temperature reconstructions based on both modelling works and various proxies. The two unique series of old meteorological observations from Greenland we used indicated that temperature in the study period was comparable to that of the early 20th-century Arctic warming but lower than that of the present day.
Stefan Brönnimann, Yuri Brugnara, and Clive Wilkinson
Clim. Past, 20, 757–767, https://doi.org/10.5194/cp-20-757-2024, https://doi.org/10.5194/cp-20-757-2024, 2024
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The early 20th century warming – the first phase of global warming in the 20th century – started from a peculiar cold state around 1910. We digitised additional ship logbooks for these years to study this specific climate state and found that it is real and likely an overlap of several climatic anomalies, including oceanic variability (La Niña) and volcanic eruptions.
Thomas Pliemon, Ulrich Foelsche, Christian Rohr, and Christian Pfister
Clim. Past, 19, 2237–2256, https://doi.org/10.5194/cp-19-2237-2023, https://doi.org/10.5194/cp-19-2237-2023, 2023
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Louis Morin consistently recorded precipitation intensity and duration between 1665 and 1713. We use these records to reconstruct precipitation totals. This reconstruction is validated by several methods and then presented using precipitation indexes. What is exceptional about this dataset is the availability of a sub-daily resolution and the low number of missing data points over the entire observation period.
Nieves Bravo-Paredes, María Cruz Gallego, Ricardo M. Trigo, and José Manuel Vaquero
Clim. Past, 19, 1397–1408, https://doi.org/10.5194/cp-19-1397-2023, https://doi.org/10.5194/cp-19-1397-2023, 2023
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We present the earliest records made in San Fernando, very close to Cádiz (SW Spain). Several previous works have already recovered a significant number of meteorological records of interest in these localities. However, more than 40 000 daily meteorological observations recorded at the Royal Observatory of the Spanish Navy (located in San Fernando) were previously unnoticed and remained neither digitized nor studied. We analyze in detail these newly recovered meteorological readings.
Stefan Brönnimann and Yuri Brugnara
Clim. Past, 19, 1435–1445, https://doi.org/10.5194/cp-19-1435-2023, https://doi.org/10.5194/cp-19-1435-2023, 2023
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We present the weather diaries of the Kirch family from 1677–1774 containing weather observations made in Leipzig and Guben and, from 1701 onward, instrumental observations made in Berlin. We publish the imaged diaries (10 445 images) and the digitized measurements (from 1720 onward). This is one of the oldest and longest meteorological records from Germany. The digitized pressure data show good agreement with neighbouring stations, highlighting their potential for weather reconstruction.
Andrew P. Schurer, Gabriele C. Hegerl, Hugues Goosse, Massimo A. Bollasina, Matthew H. England, Michael J. Mineter, Doug M. Smith, and Simon F. B. Tett
Clim. Past, 19, 943–957, https://doi.org/10.5194/cp-19-943-2023, https://doi.org/10.5194/cp-19-943-2023, 2023
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We adopt an existing data assimilation technique to constrain a model simulation to follow three important modes of variability, the North Atlantic Oscillation, El Niño–Southern Oscillation and the Southern Annular Mode. How it compares to the observed climate is evaluated, with improvements over simulations without data assimilation found over many regions, particularly the tropics, the North Atlantic and Europe, and discrepancies with global cooling following volcanic eruptions are reconciled.
Noemi Imfeld, Lucas Pfister, Yuri Brugnara, and Stefan Brönnimann
Clim. Past, 19, 703–729, https://doi.org/10.5194/cp-19-703-2023, https://doi.org/10.5194/cp-19-703-2023, 2023
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Climate reconstructions give insights into monthly and seasonal climate variability of the past few hundred years. However, to understand past extreme weather events and to relate them to impacts, for example to periods of extreme floods, reconstructions on a daily timescale are needed. Here, we present a reconstruction of 258 years of high-resolution daily temperature and precipitation fields for Switzerland covering the period 1763 to 2020, which is based on instrumental measurements.
Duncan Pappert, Mariano Barriendos, Yuri Brugnara, Noemi Imfeld, Sylvie Jourdain, Rajmund Przybylak, Christian Rohr, and Stefan Brönnimann
Clim. Past, 18, 2545–2565, https://doi.org/10.5194/cp-18-2545-2022, https://doi.org/10.5194/cp-18-2545-2022, 2022
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We present daily temperature and sea level pressure fields for Europe for the severe winter 1788/1789 based on historical meteorological measurements and an analogue reconstruction approach. The resulting reconstruction skilfully reproduces temperature and pressure variations over central and western Europe. We find intense blocking systems over northern Europe and several abrupt, strong cold air outbreaks, demonstrating that quantitative weather reconstruction of past extremes is possible.
Samuel O. Awe, Martin Mahony, Edley Michaud, Conor Murphy, Simon J. Noone, Victor K. C. Venema, Thomas G. Thorne, and Peter W. Thorne
Clim. Past, 18, 793–820, https://doi.org/10.5194/cp-18-793-2022, https://doi.org/10.5194/cp-18-793-2022, 2022
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We unearth and analyse 2 decades of highly valuable measurements made on Mauritius at the Royal Alfred Observatory, where several distinct thermometer combinations were in use and compared, at the turn of the 20th century. This series provides unique insights into biases in early instrumental temperature records. Differences are substantial and for some instruments exhibit strong seasonality. This reinforces the critical importance of understanding early instrumental series biases.
Duncan Pappert, Yuri Brugnara, Sylvie Jourdain, Aleksandra Pospieszyńska, Rajmund Przybylak, Christian Rohr, and Stefan Brönnimann
Clim. Past, 17, 2361–2379, https://doi.org/10.5194/cp-17-2361-2021, https://doi.org/10.5194/cp-17-2361-2021, 2021
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This paper presents temperature and pressure measurements from the 37 stations of the late 18th century network of the Societas Meteorologica Palatina, in addition to providing an inventory of the available observations, most of which have been digitised. The quality of the recovered series is relatively good, as demonstrated by two case studies. Early instrumental data such as these will help to explore past climate and weather extremes in Europe in greater detail.
Gerard van der Schrier, Richard P. Allan, Albert Ossó, Pedro M. Sousa, Hans Van de Vyver, Bert Van Schaeybroeck, Roberto Coscarelli, Angela A. Pasqua, Olga Petrucci, Mary Curley, Mirosław Mietus, Janusz Filipiak, Petr Štěpánek, Pavel Zahradníček, Rudolf Brázdil, Ladislava Řezníčková, Else J. M. van den Besselaar, Ricardo Trigo, and Enric Aguilar
Clim. Past, 17, 2201–2221, https://doi.org/10.5194/cp-17-2201-2021, https://doi.org/10.5194/cp-17-2201-2021, 2021
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The 1921 drought was the most severe drought to hit Europe since the start of the 20th century. Here the climatological description of the drought is coupled to an overview of its impacts, sourced from newspapers, and an analysis of its drivers. The area from Ireland to the Ukraine was affected but hardest hit was the triangle between Brussels, Paris and Lyon. The drought impacts lingered on until well into autumn and winter, affecting water supply and agriculture and livestock farming.
Hing Yim Mok, Wing Hong Lui, Dick Shum Lau, and Wang Chun Woo
Clim. Past, 16, 51–64, https://doi.org/10.5194/cp-16-51-2020, https://doi.org/10.5194/cp-16-51-2020, 2020
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Using available information from historical documents, the maximum storm surge and storm tide at Hong Kong during the passage of a typhoon in 1874 were determined by reconstructing the possible typhoon track and found to be higher than all existing records since the 1883 establishment of the Hong Kong Observatory. This reveals that a more detailed frequency analysis of extreme sea levels taking the 1874 typhoon into account is essential for realistic storm surge risk assessments in Hong Kong.
Lucas Pfister, Franziska Hupfer, Yuri Brugnara, Lukas Munz, Leonie Villiger, Lukas Meyer, Mikhaël Schwander, Francesco Alessandro Isotta, Christian Rohr, and Stefan Brönnimann
Clim. Past, 15, 1345–1361, https://doi.org/10.5194/cp-15-1345-2019, https://doi.org/10.5194/cp-15-1345-2019, 2019
Short summary
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The 18th and early 19th centuries saw pronounced climatic variations with impacts on the environment and society. Although instrumental meteorological data for that period exist, only a small fraction has been the subject of research. This study provides an overview of early instrumental meteorological records in Switzerland resulting from an archive survey and demonstrates the great potential of such data. It is accompanied by the online publication of the imaged data series and metadata.
Andrew M. Lorrey and Petra R. Chappell
Clim. Past, 12, 553–573, https://doi.org/10.5194/cp-12-553-2016, https://doi.org/10.5194/cp-12-553-2016, 2016
Short summary
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The meteorological diary of Reverend Richard Davis (1839–1844; 1848–1851) is the earliest continuous daily instrumental weather observation record for New Zealand. It pre-dates James Hector's meteorological network by more than 20 years, and it contains evidence that temperatures for May–August were on average colder than present day in Northland. Some weather extremes Davis also witnessed may have been more frequent in the mid-1800s relative to the modern era, including frost, ice and snow.
Y. Brugnara, R. Auchmann, S. Brönnimann, R. J. Allan, I. Auer, M. Barriendos, H. Bergström, J. Bhend, R. Brázdil, G. P. Compo, R. C. Cornes, F. Dominguez-Castro, A. F. V. van Engelen, J. Filipiak, J. Holopainen, S. Jourdain, M. Kunz, J. Luterbacher, M. Maugeri, L. Mercalli, A. Moberg, C. J. Mock, G. Pichard, L. Řezníčková, G. van der Schrier, V. Slonosky, Z. Ustrnul, M. A. Valente, A. Wypych, and X. Yin
Clim. Past, 11, 1027–1047, https://doi.org/10.5194/cp-11-1027-2015, https://doi.org/10.5194/cp-11-1027-2015, 2015
Short summary
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A data set of instrumental pressure and temperature observations for the early instrumental period (before ca. 1850) is described. This is the result of a digitisation effort involving the period immediately after the eruption of Mount Tambora in 1815, combined with the collection of already available sub-daily time series. The highest data availability is therefore for the years 1815 to 1817. An analysis of pressure variability and of case studies in Europe is performed for that period.
N. Kurita, Y. Fujiyoshi, T. Nakayama, Y. Matsumi, and H. Kitagawa
Clim. Past, 11, 339–353, https://doi.org/10.5194/cp-11-339-2015, https://doi.org/10.5194/cp-11-339-2015, 2015
Short summary
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This study demonstrates that the intensity of the East Asian summer and winter monsoon is the primary driver of variations of summer and winter precipitation isotopes in central Japan. Japan lies in the northeast limits of the East Asian monsoon region. Understanding the past monsoon changes in Japan is important for determining whether the isotopic variability recorded in Chinese stalagmite reflects the East Asian summer monsoon intensity or rainfall variability in the Indian summer monsoon.
R. J. H. Dunn, M. G. Donat, and L. V. Alexander
Clim. Past, 10, 2171–2199, https://doi.org/10.5194/cp-10-2171-2014, https://doi.org/10.5194/cp-10-2171-2014, 2014
Short summary
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Observational data sets contain uncertainties, e.g. from the instrument accuracy, as well as from the fact that usually only a single method is used in processing. We have performed an assessment of the size of the uncertainties associated with choices in the method used. The largest effects come from changes which affect the station network or the gridding method used. However, for the temperature indices in places with many stations, these changes have little effect on the long-term behaviour.
K. M. Willett, R. J. H. Dunn, P. W. Thorne, S. Bell, M. de Podesta, D. E. Parker, P. D. Jones, and C. N. Williams Jr.
Clim. Past, 10, 1983–2006, https://doi.org/10.5194/cp-10-1983-2014, https://doi.org/10.5194/cp-10-1983-2014, 2014
Short summary
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We have developed HadISDH, a new gridded global land monthly mean climate montitoring product for humidity and temperature from 1973 to then end of 2013 (updated annually) based entirely on in situ observations. Uncertainty estimates are provided. Over the period of record significant warming and increases in water vapour have taken place. The specific humidity trends have slowed since a peak in 1998 concurrent with decreasing relative humidity from 2000 onwards.
R. J. H. Dunn, K. M. Willett, C. P. Morice, and D. E. Parker
Clim. Past, 10, 1501–1522, https://doi.org/10.5194/cp-10-1501-2014, https://doi.org/10.5194/cp-10-1501-2014, 2014
P. Yiou, M. Boichu, R. Vautard, M. Vrac, S. Jourdain, E. Garnier, F. Fluteau, and L. Menut
Clim. Past, 10, 797–809, https://doi.org/10.5194/cp-10-797-2014, https://doi.org/10.5194/cp-10-797-2014, 2014
K. M. Willett, C. N. Williams Jr., R. J. H. Dunn, P. W. Thorne, S. Bell, M. de Podesta, P. D. Jones, and D. E. Parker
Clim. Past, 9, 657–677, https://doi.org/10.5194/cp-9-657-2013, https://doi.org/10.5194/cp-9-657-2013, 2013
F. Schenk and E. Zorita
Clim. Past, 8, 1681–1703, https://doi.org/10.5194/cp-8-1681-2012, https://doi.org/10.5194/cp-8-1681-2012, 2012
M. J. Alcoforado, J. M. Vaquero, R. M. Trigo, and J. P. Taborda
Clim. Past, 8, 353–371, https://doi.org/10.5194/cp-8-353-2012, https://doi.org/10.5194/cp-8-353-2012, 2012
R. Auchmann, S. Brönnimann, L. Breda, M. Bühler, R. Spadin, and A. Stickler
Clim. Past, 8, 325–335, https://doi.org/10.5194/cp-8-325-2012, https://doi.org/10.5194/cp-8-325-2012, 2012
H. Visser and A. C. Petersen
Clim. Past, 8, 265–286, https://doi.org/10.5194/cp-8-265-2012, https://doi.org/10.5194/cp-8-265-2012, 2012
V. K. C. Venema, O. Mestre, E. Aguilar, I. Auer, J. A. Guijarro, P. Domonkos, G. Vertacnik, T. Szentimrey, P. Stepanek, P. Zahradnicek, J. Viarre, G. Müller-Westermeier, M. Lakatos, C. N. Williams, M. J. Menne, R. Lindau, D. Rasol, E. Rustemeier, K. Kolokythas, T. Marinova, L. Andresen, F. Acquaotta, S. Fratianni, S. Cheval, M. Klancar, M. Brunetti, C. Gruber, M. Prohom Duran, T. Likso, P. Esteban, and T. Brandsma
Clim. Past, 8, 89–115, https://doi.org/10.5194/cp-8-89-2012, https://doi.org/10.5194/cp-8-89-2012, 2012
G. van der Schrier, A. van Ulden, and G. J. van Oldenborgh
Clim. Past, 7, 527–542, https://doi.org/10.5194/cp-7-527-2011, https://doi.org/10.5194/cp-7-527-2011, 2011
S. Brönnimann, G. P. Compo, R. Spadin, R. Allan, and W. Adam
Clim. Past, 7, 265–276, https://doi.org/10.5194/cp-7-265-2011, https://doi.org/10.5194/cp-7-265-2011, 2011
P. D. Jones and D. H. Lister
Clim. Past, 5, 259–267, https://doi.org/10.5194/cp-5-259-2009, https://doi.org/10.5194/cp-5-259-2009, 2009
Cited articles
Acevedo, W., Reich, S., and Cubasch, U.: Towards the assimilation of
tree-ring-width records using ensemble Kalman filtering techniques, Clim.
Dynam., 46, 1909–1920, https://doi.org/10.1007/s00382-015-2683-1, 2016.
Allan, R. and Ansell, T.: A New Globally Complete Monthly Historical Gridded
Mean Sea Level Pressure Dataset (HadSLP2): 1850–2004,
J. Climate, 19, 5816–5842,
https://doi.org/10.1175/JCLI3937.1, 2006.
Babst, F., Bouriaud, O., Poulter, B., Trouet, V., Girardin, M. P., and Frank, D. C.: Twentieth century redistribution in climatic drivers of global tree
growth, Sci. Adv., 5, eaat4313, https://doi.org/10.1126/sciadv.aat4313, 2019.
Bhend, J., Franke, J., Folini, D., Wild, M., and Brönnimann, S.: An ensemble-based approach to climate reconstructions, Clim. Past, 8, 963–976, https://doi.org/10.5194/cp-8-963-2012, 2012.
Bradley, R. S.: Are there optimum sites for global paleotemperature
reconstruction?, in: Climatic Variations and Forcing Mechanisms of the Last
2000 Years, vol. 3, Springer, Berlin, Heidelberg, Berlin,
Heidelberg, 603–624 1996.
Breitenmoser, P., Brönnimann, S., and Frank, D.: Forward modelling of tree-ring width and comparison with a global network of tree-ring chronologies, Clim. Past, 10, 437–449, https://doi.org/10.5194/cp-10-437-2014, 2014.
Christiansen, B. and Ljungqvist, F. C.: Challenges and perspectives for
large-scale temperature reconstructions of the past two millennia,
Rev. Geophys.,
55, 40–96, https://doi.org/10.1002/2016RG000521, 2017.
Crowley, T., Zielinski, G., Vinther, B., Udisti, R., Kreutz, K., Cole-Dai, J., and Castellano, E.: Volcanism and the little ice age, PAGES news, 16,
22–23, 2008.
Dee, S. G., Steiger, N. J., Emile-Geay, J., and Hakim, G. J.: On the utility
of proxy system models for estimating climate states over the common era,
J. Adv. Model. Earth Sy., 8, 1164–1179,
https://doi.org/10.1002/2016MS000677, 2016.
Emile-Geay, J., McKay, N. P., Kaufman, D. S., Gunten, von, L., Wang, J.,
Anchukaitis, K. J., Abram, N. J., Addison, J. A., Curran, M. A. J., Evans, M. N., Henley, B. J., Hao, Z., Martrat, B., McGregor, H. V., Neukom, R.,
Pederson, G. T., Stenni, B., Thirumalai, K., Werner, J. P., Xu, C., Divine, D. V., Dixon, B. C., Gergis, J., Mundo, I. A., Nakatsuka, T., Phipps, S. J.,
Routson, C. C., Steig, E. J., Tierney, J. E., Tyler, J. J., Allen, K. J.,
Bertler, N. A. N., Björklund, J., Chase, B. M., Chen, M.-T., Cook, E.,
de Jong, R., DeLong, K. L., Dixon, D. A., Ekaykin, A. A., Ersek, V.,
Filipsson, H. L., Francus, P., Freund, M. B., Frezzotti, M., Gaire, N. P.,
Gajewski, K., Ge, Q., Goosse, H., Gornostaeva, A., Grosjean, M., Horiuchi, K., Hormes, A., Husum, K., Isaksson, E., Kandasamy, S., Kawamura, K.,
Kilbourne, K. H., Koç, N., Leduc, G., Linderholm, H. W., Lorrey, A. M.,
Mikhalenko, V., Mortyn, P. G., Motoyama, H., Moy, A. D., Mulvaney, R., Munz, P. M., Nash, D. J., Oerter, H., Opel, T., Orsi, A. J., Ovchinnikov, D. V.,
Porter, T. J., Roop, H. A., Saenger, C., Sano, M., Sauchyn, D., Saunders, K. M., Seidenkrantz, M.-S., Severi, M., Shao, X., Sicre, M.-A., Sigl, M.,
Sinclair, K., St George, S., St Jacques, J.-M., Thamban, M., Thapa, U. K.,
Thomas, E. R., Turney, C., Uemura, R., Viau, A. E., Vladimirova, D. O.,
Wahl, E. R., White, J. W. C., Yu, Z., and Zinke, J.: Data Descriptor:
A global multiproxy database for temperature reconstructions of the Common
Era, Sci. Data, 4, 170088, https://doi.org/10.1038/sdata.2017.88, 2017.
Franke, J., Frank, D., Raible, C. C., Esper, J., and Brönnimann, S.:
Spectral biases in tree-ring climate proxies, Nat. Clim. Change, 3,
360–364, https://doi.org/10.1038/nclimate1816, 2013.
Franke, J., Brönnimann, S., Bhend, J., and Brugnara, Y.: A monthly global
paleo-reanalysis of the atmosphere from 1600 to 2005 for studying past
climatic variations, Sci. Data, 4, 170076, https://doi.org/10.1038/sdata.2017.76, 2017a.
Franke, J., Brönnimann, S., Bhend, J., and Brugnara, Y.: Ensemble Kalman Fitting Paleo-Reanalysis Version 1 (EKF400_v1), World Data Center for Climate (WDCC) at DKRZ, https://doi.org/10.1594/WDCC/EKF400_v1, 2017b.
Franke, J. and Valler, V.: EKF400 code, available at: https://github.com/jf256/reuse.git, last access: 13 January 2020.
Greybush, S. J., Kalnay, E., Miyoshi, T., Ide, K., and Hunt, B. R.: Balance
and Ensemble Kalman Filter Localization Techniques, Mon. Weather Rev.,
139, 511–522, https://doi.org/10.1175/2010MWR3328.1, 2011.
Hakim, G. J., Emile-Geay, J., Steig, E. J., Noone, D., Anderson, D. M.,
Tardif, R., Steiger, N., and Perkins, W. A.: The last millennium climate
reanalysis project: Framework and first results, J. Geophys. Res.-Atmos.,
121, 6745–6764, https://doi.org/10.1002/2016JD024751, 2016.
Harris, I., Jones, P. D., Osborn, T. J., and Lister, D. H.: Updated
high-resolution grids of monthly climatic observations – the CRU TS3.10
Dataset, Int. J. Climatol., 34, 623–642, https://doi.org/10.1002/joc.3711, 2014.
Hartmann, D. L., Tank, A. K., Rusticucci, M., Alexander, L. V.,
Brönnimann, S., Charabi, Y., Dentener, F. J., Dlugokencky, E. J.,
Easterling, D. R., Kaplan, A., Soden, B. J., Thorne, P. W., and Wild, M.:
Observations: atmosphere and surface. Contribution of Working Group I to the
Fifth Assessment Report of the Intergovernmental Panel on Climate Change, in:
Climate Change 2013 – The Physical Science Basis, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K. Boschung, J., Nauels, A.,
Xia, Y., Bex, V., and Midgley, P. M., Cambridge University Press,
Cambridge, UK and New York, NY, USA, 159–254 2013.
Jones, P. D., Lister, D. H., Osborn, T. J., Harpham, C., Salmon, M., and
Morice, C. P.: Hemispheric and large-scale land-surface air temperature
variations: An extensive revision and an update to 2010, J. Geophys. Res.,
117, D05127, https://doi.org/10.1029/2011JD017139, 2012.
Klippel, L., St. George, S., Büntgen, U., Krusic, P. J., and Esper, J.: Differing pre-industrial cooling trends between tree rings and
lower-resolution temperature proxies, Clim. Past, 16, 729–742,
https://doi.org/10.5194/cp-16-729-2020, 2020.
Koch, D., Jacob, D., Tegen, I., Rind, D., and Chin, M.: Tropospheric sulfur
simulation and sulfate direct radiative forcing in the Goddard Institute for
Space Studies general circulation model, J. Geophys. Res.-Atmos., 104,
23799–23822, https://doi.org/10.1029/1999JD900248, 1999.
Kutzbach, J. E. and Guetter, P. J.: On the Design of Paleoenvironmental Data
Networks for Estimating Large-Scale Patterns of Climate, Quaternary
Res., 14, 169–187, https://doi.org/10.1016/0033-5894(80)90046-0, 1980.
Landrum, L., Otto-Bliesner, B. L., Wahl, E. R., Conley, A., Lawrence, P. J.,
Rosenbloom, N., and Teng, H.: Last Millennium Climate and Its Variability in
CCSM4, J. Climate, 26, 1085–1111, https://doi.org/10.1175/JCLI-D-11-00326.1, 2013.
Lean, J.: Evolution of the Sun's Spectral Irradiance Since the Maunder
Minimum, Geophys. Res. Lett., 27, 2425–2428, https://doi.org/10.1029/2000GL000043,
2000.
Mann, M. E., Woodruff, J. D., Donnelly, J. P., and Zhang, Z.: Atlantic
hurricanes and climate over the past 1500 years, Nature, 460,
880–885, https://doi.org/10.1038/nature08219, 2009.
Masson-Delmotte, V., Schulz, M., Abe-Ouchi, A., Beer, J., Ganopolski, A.,
Gonzalez-Rouco, F. J., Jansen, E., Lambeck, K., Luterbacher, J., Naish, T.,
Osborn, T., Otto-Bliesner, B., Quinn, T., Ramesh, R., Rojas, M., Shao, X.
and Timmermann, A.: Information from paleoclimate archives, in: Working Group
I Contribution to the Fifth Assessment Report of the Intergovernmental Panel
on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K.,
Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and
Midgley, P. M., Cambridge University Press, Cambridge, UK
and New York, NY, USA, 383–464, 2013.
Neukom, R., Barboza, L. A., Erb, M. P., Shi, F., Emile-Geay, J., Evans, M. N., Franke, J., Kaufman, D. S., Lücke, L., Rehfeld, K., Schurer, A.,
Zhu, F., Brönnimann, S., Hakim, G. J., Henley, B. J., Ljungqvist, F. C.,
McKay, N., Valler, V., and Gunten, von L.: Consistent multidecadal
variability in global temperature reconstructions and simulations over the
Common Era, Nat. Geosci., 536, 411, https://doi.org/10.1038/s41561-019-0400-0,
2019a.
Neukom, R., Steiger, N., Gómez-Navarro, J. J., Wang, J., and Werner, J. P.: No evidence for globally coherent warm and cold periods over the
preindustrial Common Era, Nature, 571, 550–554,
https://doi.org/10.1038/s41586-019-1401-2, 2019b.
PAGES2k Consortium: PAGES2k Global 2,000 Year Multiproxy Database, available at: https://www.ncdc.noaa.gov/paleo-search/study/21171, last access: 2 May 2019
Pongratz, J., Reick, C., Raddatz, T., and Claussen, M.: A reconstruction of
global agricultural areas and land cover for the last millennium, Global
Biogeochem. Cy., 22, GB3018, https://doi.org/10.1029/2007GB003153, 2008.
Roeckner, E.: The Atmospheric General Circulation Model ECHAM5,
Max-Planck-Institut für Meteorologie, Hamburg, Germany, Report No. 349, 2003.
Rutherford, S., Mann, M. E., Osborn, T. J., Bradley, R. S., Briffa, K. R.,
Hughes, M. K., and Jones, P. D.: Proxy-based Northern Hemisphere surface
temperature reconstructions: Sensitivity to method, predictor network,
target season, and target domain, J. Climate, 18, 2308–2329, 2005.
Slivinski, L. C., Compo, G. P., Whitaker, J. S., Sardeshmukh, P. D., Giese, B. S., McColl, C., Allan, R., Yin, X., Vose, R., Titchner, H., Kennedy, J.,
Spencer, L. J., Ashcroft, L., Brönnimann, S., Brunet, M., Camuffo, D.,
Cornes, R., Cram, T. A., Crouthamel, R., Castro, F. D., Freeman, J. E.,
Gergis, J., Hawkins, E., Jones, P. D., Jourdain, S., Kaplan, A., Kubota, H.,
Le Blancq, F., Lee, T. C., Lorrey, A., Luterbacher, J., Maugeri, M., Mock, C. J., Moore, G. W. K., Przybylak, R., Pudmenzky, C., Reason, C., Slonosky, V. C., Smith, C., Tinz, B., Trewin, B., Valente, M. A., Wang, X. L.,
Wilkinson, C., Wood, K., and Wyszyn'ski, P.: Towards a more reliable
historical reanalysis: Improvements for version 3 of the Twentieth Century
Reanalysis system, Q. J. Roy. Meteor. Soc., 145,
qj.3598, https://doi.org/10.1002/qj.3598, 2019.
Smerdon, J. E. and Pollack, H. N.: Reconstructing Earth's surface
temperature over the past 2000 years: the science behind the headlines,
WIREs Clim. Change, 7, 746–771,
https://doi.org/10.1002/wcc.418, 2016.
Steiger, N. J., Smerdon, J. E., Cook, E. R., and Cook, B. I.:
A reconstruction of global hydroclimate and dynamical variables over the
Common Era, Sci. Data, 5, 180086-15, https://doi.org/10.1038/sdata.2018.86, 2018.
Stine, A. R. and Huybers, P.: Arctic tree rings as recorders of variations
in light availability, Nat. Commun., 5, 3836,
https://doi.org/10.1038/ncomms4836, 2014.
Swinbank, R., Shutyaev, V., and Lahoz, W. A.: Data Assimilation for the Earth
System, edited by: Swinbank, R., Shutyaev, V., and Lahoz, W. A., Springer
Science & Business Media, Dordrecht, 2012.
Tardif, R., Hakim, G. J., Perkins, W. A., Horlick, K. A., Erb, M. P., Emile-Geay, J., Anderson, D. M., Steig, E. J., and Noone, D.: Last Millennium Reanalysis with an expanded proxy database and seasonal proxy modeling, Clim. Past, 15, 1251–1273, https://doi.org/10.5194/cp-15-1251-2019, 2019.
Tolwinski-Ward, S. E., Evans, M. N., Hughes, M. K., and Anchukaitis, K. J.:
An efficient forward model of the climate controls on interannual variation
in tree-ring width, Clim. Dynam., 36, 2419–2439,
https://doi.org/10.1007/s00382-010-0945-5, 2011.
Valler, V., Franke, J., and Brönnimann, S.: Impact of different estimations of the background-error covariance matrix on climate reconstructions based on data assimilation, Clim. Past, 15, 1427–1441, https://doi.org/10.5194/cp-15-1427-2019, 2019.
Whitaker, J. S. and Hamill, T. M.: Ensemble Data Assimilation without
Perturbed Observations, Mon. Weather Rev., 130, 1913–1924,
https://doi.org/10.1175/1520-0493(2002)130{<}1913:EDAWPO{>}2.0.CO;2,
2002.
Whitaker, J. S., Hamill, T. M., Wei, X., Song, Y., and Toth, Z.: Ensemble
data assimilation with the NCEP Global Forecast System, Mon. Weather
Rev., 136, 463–482, https://doi.org/10.1175/2007MWR2018.1, 2008.
Wilson, R., Anchukaitis, K., Briffa, K. R., Büntgen, U., Cook, E.,
D'arrigo, R., Davi, N., Esper, J., Frank, D., Gunnarson, B., Hegerl, G.,
Helama, S., Klesse, S., Krusic, P. J., Linderholm, H. W., Myglan, V.,
Osborn, T. J., Rydval, M., Schneider, L., Schurer, A., Wiles, G., Zhang, P.,
and Zorita, E.: Last millennium Northern Hemisphere summer temperatures from
tree rings: Part I: The long term context, Quaternary Sci. Rev., 134,
1–18, https://doi.org/10.1016/j.quascirev.2015.12.005, 2016.
Wilson, R. J. S., Anchukaitis, K. J., Briffa, K. R., Büntgen, U., Cook, E. R., D'Arrigo, R. D., Davi, N. K., Esper, J., Frank, D. C., Gunnarson, B. E., Hegerl, G. C., Helama, S., Klesse, S., Krusic, P. J., Linderholm, H. W., Myglan, V. S., Osborn, T. J., Rydval, M., Schneider, L., Schurer, A. P., Wiles, G., Zhang, P., and Zorita, E.: Northern Hemisphere 1250 Year N-TREND Summer Temperature Reconstructions, available at: https://www.ncdc.noaa.gov/paleo-search/study/19743, last access: 2 May 2019.
Yoshimori, M., Raible, C. C., Stocker, T. F., and Renold, M.: Simulated
decadal oscillations of the Atlantic meridional overturning circulation in
a cold climate state, Clim. Dynam., 34, 101–121,
https://doi.org/10.1007/s00382-009-0540-9, 2010.
Zhao, S., Pederson, N., D'Orangeville, L., HilleRisLambers, J., Boose, E.,
Penone, C., Bauer, B., Jiang, Y., and Manzanedo, R. D.: The International
Tree-Ring Data Bank (ITRDB) revisited: Data availability and global
ecological representativity, J. Biogeogr., 46, 355–368,
https://doi.org/10.1111/jbi.13488, 2018.
Short summary
This study explores the influence of the input data choice on spatial climate reconstructions. We compare three tree-ring-based data sets which range from small sample size, small spatial coverage and strict screening for temperature sensitivity to the opposite. We achieve the best spatial reconstruction quality by combining all available input data but rejecting records with little and uncertain climatic information and considering moisture availability as an additional growth limitation.
This study explores the influence of the input data choice on spatial climate reconstructions....
