Articles | Volume 10, issue 5
https://doi.org/10.5194/cp-10-1751-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-10-1751-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
19 Sep 2014
Research article |
| 19 Sep 2014
Natural periodicities and Northern Hemisphere–Southern Hemisphere connection of fast temperature changes during the last glacial period: EPICA and NGRIP revisited
T. Alberti
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
F. Lepreti
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
CNISM Unità di Cosenza, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
A. Vecchio
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
Istituto Nazionale di Geofisica e Vulcanologia, Sede di Cosenza, Rende (CS), Italy
E. Bevacqua
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
V. Capparelli
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
V. Carbone
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci 31C, 87036 Rende (CS), Italy
CNR-ISAC, Lamezia Terme (CZ), Italy
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Fabiola Banfi, Emanuele Bevacqua, Pauline Rivoire, Sérgio C. Oliveira, Joaquim G. Pinto, Alexandre M. Ramos, and Carlo De Michele
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Tommaso Alberti, Mirko Piersanti, Antonio Vecchio, Paola De Michelis, Fabio Lepreti, Vincenzo Carbone, and Leonardo Primavera
Ann. Geophys., 34, 1069–1084, https://doi.org/10.5194/angeo-34-1069-2016, https://doi.org/10.5194/angeo-34-1069-2016, 2016
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Related subject area
Subject: Climate Modelling | Archive: Ice Cores | Timescale: Millenial/D-O
Advances in conceptual modelling of the variable nature of Dansgaard-Oeschger events
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol
Sea ice feedbacks influence the isotopic signature of Greenland ice sheet elevation changes: last interglacial HadCM3 simulations
Assessing the robustness of Antarctic temperature reconstructions over the past 2 millennia using pseudoproxy and data assimilation experiments
Random and externally controlled occurrences of Dansgaard–Oeschger events
Quantifying molecular oxygen isotope variations during a Heinrich stadial
Temperature reconstruction from 10 to 120 kyr b2k from the NGRIP ice core
Volcanic synchronisation of the EPICA-DC and TALDICE ice cores for the last 42 kyr BP
TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica
Jonathan Ortved Melcher, Sune Halkjær, Peter Ditlevsen, Peter L. Langen, Guido Vettoretti, and Sune Olander Rasmussen
EGUsphere, https://doi.org/10.5194/egusphere-2024-2156, https://doi.org/10.5194/egusphere-2024-2156, 2024
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We introduce a new model that simulates Dansgaard-Oeschger events, dramatic and irregular climate shifts within past ice ages. The model consists of simplified equations inspired by ocean-current dynamics. We fine-tune this model to capture the Dansgaard-Oeschger events with unprecedented accuracy, providing deeper insights into past climate patterns. This helps us understand and predict complex climate changes, aiding future climate-change resilience efforts.
Irene Malmierca-Vallet, Louise C. Sime, and the D–O community members
Clim. Past, 19, 915–942, https://doi.org/10.5194/cp-19-915-2023, https://doi.org/10.5194/cp-19-915-2023, 2023
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Greenland ice core records feature Dansgaard–Oeschger (D–O) events, abrupt warming episodes followed by a gradual-cooling phase during mid-glacial periods. There is uncertainty whether current climate models can effectively represent the processes that cause D–O events. Here, we propose a Marine Isotopic Stage 3 (MIS3) baseline protocol which is intended to provide modelling groups investigating D–O oscillations with a common framework.
Irene Malmierca-Vallet, Louise C. Sime, Paul J. Valdes, and Julia C. Tindall
Clim. Past, 16, 2485–2508, https://doi.org/10.5194/cp-16-2485-2020, https://doi.org/10.5194/cp-16-2485-2020, 2020
François Klein, Nerilie J. Abram, Mark A. J. Curran, Hugues Goosse, Sentia Goursaud, Valérie Masson-Delmotte, Andrew Moy, Raphael Neukom, Anaïs Orsi, Jesper Sjolte, Nathan Steiger, Barbara Stenni, and Martin Werner
Clim. Past, 15, 661–684, https://doi.org/10.5194/cp-15-661-2019, https://doi.org/10.5194/cp-15-661-2019, 2019
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Antarctic temperature changes over the past millennia have been reconstructed from isotope records in ice cores in several studies. However, the link between both variables is complex. Here, we investigate the extent to which this affects the robustness of temperature reconstructions using pseudoproxy and data assimilation experiments. We show that the reconstruction skill is limited, especially at the regional scale, due to a weak and nonstationary covariance between δ18O and temperature.
Johannes Lohmann and Peter D. Ditlevsen
Clim. Past, 14, 609–617, https://doi.org/10.5194/cp-14-609-2018, https://doi.org/10.5194/cp-14-609-2018, 2018
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The climate of the last glacial period was frequently interrupted by rapid warming events, the cause of which is still unknown. One open question is whether the occurrence of events is random or externally controlled. We studied the temporal characteristics of warm and cold phases using statistical null models and find that they are well described as random processes modulated by two different external climate factors. This may help distinguish physical mechanisms for rapid climate change.
C. Reutenauer, A. Landais, T. Blunier, C. Bréant, M. Kageyama, M.-N. Woillez, C. Risi, V. Mariotti, and P. Braconnot
Clim. Past, 11, 1527–1551, https://doi.org/10.5194/cp-11-1527-2015, https://doi.org/10.5194/cp-11-1527-2015, 2015
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Isotopes of atmospheric O2 undergo millennial-scale variations during the last glacial period, and systematically increase during Heinrich stadials.
Such variations are mostly due to vegetation and water cycle processes.
Our modeling approach reproduces the main observed features of Heinrich stadials in terms of climate, vegetation and rainfall.
It highlights the strong role of hydrology on O2 isotopes, which can be seen as a global integrator of precipitation changes over vegetated areas.
P. Kindler, M. Guillevic, M. Baumgartner, J. Schwander, A. Landais, and M. Leuenberger
Clim. Past, 10, 887–902, https://doi.org/10.5194/cp-10-887-2014, https://doi.org/10.5194/cp-10-887-2014, 2014
M. Severi, R. Udisti, S. Becagli, B. Stenni, and R. Traversi
Clim. Past, 8, 509–517, https://doi.org/10.5194/cp-8-509-2012, https://doi.org/10.5194/cp-8-509-2012, 2012
D. Buiron, J. Chappellaz, B. Stenni, M. Frezzotti, M. Baumgartner, E. Capron, A. Landais, B. Lemieux-Dudon, V. Masson-Delmotte, M. Montagnat, F. Parrenin, and A. Schilt
Clim. Past, 7, 1–16, https://doi.org/10.5194/cp-7-1-2011, https://doi.org/10.5194/cp-7-1-2011, 2011
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