CP - recent papers
https://cp.copernicus.org/articles/
Combined list of the recent articles of the journal Climate of the Past and the recent discussion forum Climate of the Past DiscussionsA Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers: PaleoGrIS version 1.0
https://doi.org/10.5194/cp-20-701-2024
<b>A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers: PaleoGrIS version 1.0</b><br>
Tancrède P. M. Leger, Christopher D. Clark, Carla Huynh, Sharman Jones, Jeremy C. Ely, Sarah L. Bradley, Christiaan Diemont, and Anna L. C. Hughes<br>
Clim. Past, 20, 701–755, https://doi.org/10.5194/cp-20-701-2024, 2024<br>
Projecting the future evolution of the Greenland Ice Sheet is key. However, it is still under the influence of past climate changes that occurred over thousands of years. This makes calibrating projection models against current knowledge of its past evolution (not yet achieved) important. To help with this, we produced a new Greenland-wide reconstruction of ice sheet extent by gathering all published studies dating its former retreat and by mapping its past margins at the ice sheet scale.
2024-03-28T18:03:44+01:00Late Quaternary glacial maxima in Southern Patagonia: insights from the Lago Argentino glacier lobe
https://doi.org/10.5194/cp-2024-24
<b>Late Quaternary glacial maxima in Southern Patagonia: insights from the Lago Argentino glacier lobe</b><br>
Matias Romero, Shanti B. Penprase, Maximillian S. Van Wyk de Vries, Andrew D. Wickert, Andrew G. Jones, Shaun A. Marcott, Jorge A. Strelin, Mateo A. Martini, Tammy M. Rittenour, Guido Brignone, Mark D. Shapley, Emi Ito, Kelly R. MacGregor, and Marc W. Caffee<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-24,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 0 comments)<br>
Investigating past glaciated regions is crucial to understanding how ice sheets have responded to climate forcings and how they might respond to different emission scenarios in the near future. We use two independent dating techniques to document the timing and extent of the last two glacial cycles in southern Patagonia. Our work highlights feedbacks in the Earth’s system responsible for driving glacier growth in the Southern Hemisphere prior to the global Last Glacial Maximum.
2024-03-26T18:03:44+01:00Statistical precursor signals for Dansgaard–Oeschger cooling transitions
https://doi.org/10.5194/cp-20-683-2024
<b>Statistical precursor signals for Dansgaard–Oeschger cooling transitions</b><br>
Takahito Mitsui and Niklas Boers<br>
Clim. Past, 20, 683–699, https://doi.org/10.5194/cp-20-683-2024, 2024<br>
In general, the variance and short-lag autocorrelations of the fluctuations increase in a system approaching a critical transition. Using these indicators, we identify statistical precursor signals for the Dansgaard–Oeschger cooling events recorded in two climatic proxies of three Greenland ice core records. We then provide a dynamical systems theory that bridges the gap between observing statistical precursor signals and the physical precursor signs empirically known in paleoclimate research.
2024-03-22T18:03:44+01:00Weathering trends in the Norian through geochemical and rock magnetic analyses from the Pignola–Abriola section (Lagonegro Basin, Italy)
https://doi.org/10.5194/cp-20-637-2024
<b>Weathering trends in the Norian through geochemical and rock magnetic analyses from the Pignola–Abriola section (Lagonegro Basin, Italy)</b><br>
Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, and Manuel Rigo<br>
Clim. Past, 20, 637–658, https://doi.org/10.5194/cp-20-637-2024, 2024<br>
For better knowledge of the climate perturbation that occurred in the lattermost part of the Triassic (Norian–Rhaetian), we investigated the geochemical and rock magnetic properties of the limestones of the Pignola–Abriola section (Lagonegro Basin, Italy). Our investigation revealed at least a major episode of enhanced weathering occurring in the late Norian (~217–211 Ma), possibly related to the Cimmerian orogen and/or the northward motion of Pangea across the equatorial humid belt.
2024-03-22T18:03:44+01:00Extreme springs in Switzerland since 1763 in climate and phenological indices
https://doi.org/10.5194/cp-20-659-2024
<b>Extreme springs in Switzerland since 1763 in climate and phenological indices</b><br>
Noemi Imfeld, Koen Hufkens, and Stefan Brönnimann<br>
Clim. Past, 20, 659–682, https://doi.org/10.5194/cp-20-659-2024, 2024<br>
Climate and weather in spring are important because they can have far-reaching impacts, e.g. on plant growth, due to cold spells. Here, we study changes in climate and phenological indices for the period from 1763 to 2020 based on newly published reconstructed fields of daily temperature and precipitation for Switzerland. We look at three cases of extreme spring conditions, namely a warm spring in 1862, two frost events in 1873 and 1957, and three cold springs in 1785, 1837, and 1852.
2024-03-22T18:03:44+01:00Abrupt warming and alpine glacial retreat through the last deglaciation in Alaska interrupted by modest Northern Hemisphere cooling
https://doi.org/10.5194/cp-20-625-2024
<b>Abrupt warming and alpine glacial retreat through the last deglaciation in Alaska interrupted by modest Northern Hemisphere cooling</b><br>
Joseph P. Tulenko, Jason P. Briner, Nicolás E. Young, and Joerg M. Schaefer<br>
Clim. Past, 20, 625–636, https://doi.org/10.5194/cp-20-625-2024, 2024<br>
We take advantage of a site in Alaska – where climate records are limited and a former alpine glacier deposited a dense sequence of moraines spanning the full deglaciation – to construct a proxy summer temperature record. Building on age constraints for moraines in the valley, we reconstruct paleo-glacier surfaces and estimate the summer temperatures (relative to the Little Ice Age) for each moraine. The record suggests that the influence of North Atlantic climate forcing extended to Alaska.
2024-03-21T18:03:44+01:00Diagnosing the controls on desert dust emissions through the Phanerozoic
https://doi.org/10.5194/cp-2024-22
<b>Diagnosing the controls on desert dust emissions through the Phanerozoic</b><br>
Yixuan Xie, Daniel J. Lunt, and Paul J. Valdes<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-22,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 0 comments)<br>
Dust plays a crucial role in the climate system; while it is relatively well studied for the present day, we still lack how it was in the past and the underlying mechanism in the multi-million-year time scale of Earth’s history. Here, for the first time, we simulate dust emissions with the newly developed DUSTY model over the past 540 million years with a temporal resolution of ~5 million years and identify palaeogeography as the primary control of these variations.
2024-03-21T18:03:44+01:00A past and present perspective on the European summer vapor pressure deficit
https://doi.org/10.5194/cp-20-573-2024
<b>A past and present perspective on the European summer vapor pressure deficit</b><br>
Viorica Nagavciuc, Simon L. L. Michel, Daniel F. Balting, Gerhard Helle, Mandy Freund, Gerhard H. Schleser, David N. Steger, Gerrit Lohmann, and Monica Ionita<br>
Clim. Past, 20, 573–595, https://doi.org/10.5194/cp-20-573-2024, 2024<br>
The main aim of this paper is to present the summer vapor pressure deficit (VPD) reconstruction dataset for the last 400 years over Europe based on δ18O records by using a random forest approach. We provide both a spatial and a temporal long-term perspective on the past summer VPD and new insights into the relationship between summer VPD and large-scale atmospheric circulation. This is the first gridded reconstruction of the European summer VPD over the past 400 years.
2024-03-18T18:03:44+01:00Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks
https://doi.org/10.5194/cp-20-597-2024
<b>Glacial inception through rapid ice area increase driven by albedo and vegetation feedbacks</b><br>
Matteo Willeit, Reinhard Calov, Stefanie Talento, Ralf Greve, Jorjo Bernales, Volker Klemann, Meike Bagge, and Andrey Ganopolski<br>
Clim. Past, 20, 597–623, https://doi.org/10.5194/cp-20-597-2024, 2024<br>
We present transient simulations of the last glacial inception with the coupled climate–ice sheet model CLIMBER-X showing a rapid increase in Northern Hemisphere ice sheet area and a sea level drop by ~ 35 m, with the vegetation feedback playing a key role. Overall, our simulations confirm and refine previous results showing that climate-vegetation–cryosphere–carbon cycle feedbacks play a fundamental role in the transition from interglacial to glacial states.
2024-03-18T18:03:44+01:00Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years
https://doi.org/10.5194/cp-20-547-2024
<b>Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years</b><br>
Montserrat Alonso-Garcia, Jesus Reolid, Francisco J. Jimenez-Espejo, Or M. Bialik, Carlos A. Alvarez Zarikian, Juan Carlos Laya, Igor Carrasquiera, Luigi Jovane, John J. G. Reijmer, Gregor P. Eberli, and Christian Betzler<br>
Clim. Past, 20, 547–571, https://doi.org/10.5194/cp-20-547-2024, 2024<br>
The Maldives Inner Sea (northern Indian Ocean) offers an excellent study site to explore the impact of climate and sea-level changes on carbonate platforms. The sediments from International Ocean Discovery Program (IODP) Site U1467 have been studied to determine the drivers of carbonate production in the atolls over the last 1.3 million years. Even though sea level is important, the intensity of the summer monsoon and the Indian Ocean dipole probably modulated the production at the atolls.
2024-03-18T18:03:44+01:00Planktonic foraminiferal assemblages as tracers of paleoceanographic changes within the Northern Benguela current system since the Early Pleistocene
https://doi.org/10.5194/cp-2024-16
<b>Planktonic foraminiferal assemblages as tracers of paleoceanographic changes within the Northern Benguela current system since the Early Pleistocene</b><br>
Arianna Valentina Del Gaudio, Aaron Avery, Gerald Auer, Werner Erwin Piller, and Walter Kurz<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-16,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 0 comments)<br>
The Benguela Upwelling System is a region in the SE Atlantic Ocean of high biological productivity. It comprises several water masses such as the Benguela Current, the South Atlantic Central Water and the Indian Ocean Agulhas waters. We analyzed planktonic foraminifera from IODP Sites U1575-U1576 to characterize the water masses and their interplay in the Pleistocene. This defined changes in the local thermocline, which were linked to long-term Benguela Niño/Niña-like and deglaciation events.
2024-03-18T18:03:44+01:00Antarctic climate response in Last-Interglacial simulations using the Community Earth System Model (CESM2)
https://doi.org/10.5194/cp-2024-19
<b>Antarctic climate response in Last-Interglacial simulations using the Community Earth System Model (CESM2)</b><br>
Mira Berdahl, Gunter R. Leguy, William H. Lipscomb, Bette L. Otto-Bliesner, Esther C. Brady, Robert A. Tomas, Nathan M. Urban, Ian Miller, Harriet Morgan, and Eric J. Steig<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-19,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 0 comments)<br>
Studying climate conditions near the Antarctic ice sheet (AIS) during Earth’s past warm periods informs us about how global warming may influence AIS ice loss. Using a global climate model, we investigate climate conditions near the AIS during the Last Interglacial (129 to 116 kyr ago), a period with warmer global temperatures and higher sea level than today. We identify the orbital and freshwater forcings that could cause ice loss and probe the mechanisms that lead to warmer climate conditions.
2024-03-15T18:03:44+01:00Evolution of winter precipitation in the Nile river watershed since the last glacial
https://doi.org/10.5194/cp-20-523-2024
<b>Evolution of winter precipitation in the Nile river watershed since the last glacial</b><br>
Vera Dorothee Meyer, Jürgen Pätzold, Gesine Mollenhauer, Isla S. Castañeda, Stefan Schouten, and Enno Schefuß<br>
Clim. Past, 20, 523–546, https://doi.org/10.5194/cp-20-523-2024, 2024<br>
The climatic factors sustaining vegetation in the Sahara during the African humid period (AHP) are still not fully understood. Using biomarkers in a marine sediment core from the eastern Mediterranean, we infer variations in Mediterranean (winter) and monsoonal (summer) rainfall in the Nile river watershed around the AHP. We find that winter and summer rain enhanced during the AHP, suggesting that Mediterranean moisture supported the monsoon in sustaining the “green Sahara”.
2024-03-14T18:03:44+01:00CO2-driven and orbitally driven oxygen isotope variability in the Early Eocene
https://doi.org/10.5194/cp-20-495-2024
<b>CO2-driven and orbitally driven oxygen isotope variability in the Early Eocene</b><br>
Julia Campbell, Christopher J. Poulsen, Jiang Zhu, Jessica E. Tierney, and Jeremy Keeler<br>
Clim. Past, 20, 495–522, https://doi.org/10.5194/cp-20-495-2024, 2024<br>
In this study, we use climate modeling to investigate the relative impact of CO2 and orbit on Early Eocene (~ 55 million years ago) climate and compare our modeled results to fossil records to determine the context for the Paleocene–Eocene Thermal Maximum, the most extreme hyperthermal in the Cenozoic. Our conclusions consider limitations and illustrate the importance of climate models when interpreting paleoclimate records in times of extreme warmth.
2024-03-13T18:03:44+01:00Reconstructing hydroclimate changes over the past 2500 years using speleothems from Pyrenean caves (NE Spain)
https://doi.org/10.5194/cp-20-467-2024
<b>Reconstructing hydroclimate changes over the past 2500 years using speleothems from Pyrenean caves (NE Spain)</b><br>
Miguel Bartolomé, Ana Moreno, Carlos Sancho, Isabel Cacho, Heather Stoll, Negar Haghipour, Ánchel Belmonte, Christoph Spötl, John Hellstrom, R. Lawrence Edwards, and Hai Cheng<br>
Clim. Past, 20, 467–494, https://doi.org/10.5194/cp-20-467-2024, 2024<br>
Reconstructing past temperatures at regional scales during the Common Era is necessary to place the current warming in the context of natural climate variability. We present a climate reconstruction based on eight stalagmites from four caves in the Pyrenees, NE Spain. These stalagmites were dated precisely and analysed for their oxygen isotopes, which appear dominated by temperature changes. Solar variability and major volcanic eruptions are the two main drivers of observed climate variability.
2024-03-13T18:03:44+01:00High-resolution LGM climate of Europe and the Alpine region using the regional climate model WRF
https://doi.org/10.5194/cp-20-449-2024
<b>High-resolution LGM climate of Europe and the Alpine region using the regional climate model WRF</b><br>
Emmanuele Russo, Jonathan Buzan, Sebastian Lienert, Guillaume Jouvet, Patricio Velasquez Alvarez, Basil Davis, Patrick Ludwig, Fortunat Joos, and Christoph C. Raible<br>
Clim. Past, 20, 449–465, https://doi.org/10.5194/cp-20-449-2024, 2024<br>
We present a series of experiments conducted for the Last Glacial Maximum (~21 ka) over Europe using the regional climate Weather Research and Forecasting model (WRF) at convection-permitting resolutions. The model, with new developments better suited to paleo-studies, agrees well with pollen-based climate reconstructions. This agreement is improved when considering different sources of uncertainty. The effect of convection-permitting resolutions is also assessed.
2024-03-12T18:03:44+01:00A global analysis of reconstructed land climate changes during Dansgaard-Oeschger events
https://doi.org/10.5194/cp-2024-12
<b>A global analysis of reconstructed land climate changes during Dansgaard-Oeschger events</b><br>
Mengmeng Liu, Iain Colin Prentice, and Sandy P. Harrison<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-12,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 1 comment)<br>
Dansgaard-Oeschger events were large and rapid warming events that occurred multiple times during the last ice age. We show that changes in the northern extratropics and the southern extratropics were anti-phased, with warming over most of the north and cooling in the south. The reconstructions do not provide evidence for a change in seasonality in temperature. However, they do indicate that warming was generally accompanied by wetter conditions and cooling by drier conditions.
2024-03-12T18:03:44+01:00Orbitally forced environmental changes during the accumulation of a Pliensbachian (Lower Jurassic) black shale in northern Iberia
https://doi.org/10.5194/cp-2024-13
<b>Orbitally forced environmental changes during the accumulation of a Pliensbachian (Lower Jurassic) black shale in northern Iberia</b><br>
Naroa Martínez-Braceras, Aitor Payros, Jaume Dinarès-Turell, Idoia Rosales, Javier Arostegi, and Roi Silva-Casal<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-13,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 0 comments)<br>
Although significant progress in Early Jurassic cyclostratigraphy has been made in the last few decades, fewer studies have focused on the climatic and environmental impact of orbital cycles on the sedimentary record. This study present an original orbitally modulated depositional model, which provides new insight into the formation of orbitally modulated organic-rich calcareous hemipelagic rhythmites accumulated in Early Pliensbachian times in the northern Iberian paleomargin.
2024-03-11T18:03:44+01:00Astronomically paced climate and carbon cycle feedbacks in the lead-up to the Late Devonian Kellwasser Crisis
https://doi.org/10.5194/cp-20-415-2024
<b>Astronomically paced climate and carbon cycle feedbacks in the lead-up to the Late Devonian Kellwasser Crisis</b><br>
Nina M. A. Wichern, Or M. Bialik, Theresa Nohl, Lawrence M. E. Percival, R. Thomas Becker, Pim Kaskes, Philippe Claeys, and David De Vleeschouwer<br>
Clim. Past, 20, 415–448, https://doi.org/10.5194/cp-20-415-2024, 2024<br>
Middle–Late Devonian sedimentary rocks are often punctuated by anoxic black shales. Due to their semi-regular nature, anoxic events may be linked to periodic changes in the Earth’s climate caused by astronomical forcing. We use portable X-ray fluorescence elemental records, measured on marine sediments from Germany, to construct an astrochronological framework for the Kellwasser ocean anoxic Crisis. Results suggest that the Upper Kellwasser event was preceded by a specific orbital configuration.
2024-02-28T18:03:44+01:00The Spatial-Temporal Evolution of the Chongzhen Drought (1627–1644) in China and its Impact on Famine
https://doi.org/10.5194/cp-2024-11
<b>The Spatial-Temporal Evolution of the Chongzhen Drought (1627–1644) in China and its Impact on Famine</b><br>
Siying Chen, Yun Su, Xudong Chen, and Liang Emlyn Yang<br>
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-11,2024<br>
<b>Preprint under review for CP</b> (discussion: open, 3 comments)<br>
This study used 1,802 drought and 1,977 famine records from historical documents to reconstruct the spatial-temporal progression of the Chongzhen Drought (1627–1644) in China and its impact on famine. The advances: reconstructing the annual spatial patterns and regional series of drought; demonstrating drought as the primary factor triggering famine, contributing 2/3; finding a continuity of 2–3 years in drought’s impacts on famine; identifying the transmission pathway of the drought's impacts.
2024-02-27T18:03:44+01:00