Continental-scale temperature variability during the past two millennia

International audience Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperat...

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Published in:Nature Geoscience
Main Authors: Pages 2k Consortium, Ahmed, Moinuddin, Anchukaitis, Kevin J., Asrat, Asfawossen, Borgaonkar, Hemant P., Braida, Martina, Buckley, Brendan M., Büntgen, Ulf, Chase, Brian M., Christie, Duncan A., Cook, Edward R., Curran, Mark A. J., Diaz, Henry F., Esper, Jan, Fan, Ze-Xin, Gaire, Narayan P., Ge, Quansheng, Gergis, Joëlle, González-Rouco, J. Fidel, Goosse, Hugues, Grab, Stefan W., Graham, Nicholas, Graham, Rochelle, Grosjean, Martin, Hanhijärvi, Sami T., Kaufman, Darrell S., Kiefer, Thorsten, Kimura, Katsuhiko, Korhola, Atte A., Krusic, Paul J., Lara, Antonio, Lézine, Anne-Marie, Ljungqvist, Fredrik C., Lorrey, Andrew M., Luterbacher, Jürg, Masson-Delmotte, Valérie, Mccarroll, Danny, Mcconnell, Joseph R., Mckay, Nicholas P., Morales, Mariano S., Moy, Andrew D., Mulvaney, Robert, Mundo, Ignacio A., Nakatsuka, Takeshi, Nash, David J., Neukom, Raphael, Nicholson, Sharon E., Oerter, Hans, Palmer, Jonathan G., Phipps, Steven J., Prieto, Maria R., Rivera, Andres, Sano, Masaki, Severi, Mirko, Shanahan, Timothy M., Shao, Xuemei, Shi, Feng, Sigl, Michael, Smerdon, Jason E., Solomina, Olga N., Steig, Eric J., Stenni, Barbara, Thamban, Meloth, Trouet, Valerie, Turney, Chris S. M., Umer, Mohammed, van Ommen, Tas, Verschuren, Dirk, Viau, Andre E., Villalba, Ricardo, Vinther, Bo M., von Gunten, Lucien, Wagner, Sebastian, Wahl, Eugene R., Wanner, Heinz, Werner, Johannes P., White, James W. C., Yasue, Koh, Zorita, Eduardo
Other Authors: Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR), Université Catholique de Louvain = Catholic University of Louvain (UCL), Hydrologic Research Center, Paléoclimats, proxies, processus (PALEOPROXUS), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Glaces et Continents, Climats et Isotopes Stables (GLACCIOS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Centro de Estudios Científicos (CECs), Departamento de Geografia Santiago, Department of Chemistry, Università degli Studi di Firenze = University of Florence (UniFI), Department of Chemistry and Biochemistry, Universität Bern / University of Bern (UNIBE), Dipartimento di Scienze Geologiche Trieste, Università degli studi di Trieste = University of Trieste
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2013
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Online Access:https://hal.science/hal-00873363
https://doi.org/10.1038/NGEO1797
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Summary:International audience Past global climate changes had strong regional expression. To elucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two millennia. The most coherent feature in nearly all of the regional temperature reconstructions is a long-term cooling trend, which ended late in the nineteenth century. At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them. There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between AD 1580 and 1880, punctuated in some regions by warm decades during the eighteenth century. The transition to these colder conditions occurred earlier in the Arctic, Europe and Asia than in North America or the Southern Hemisphere regions. Recent warming reversed the long-term cooling; during the period AD 1971-2000, the area-weighted average reconstructed temperature was higher than any other time in nearly 1,400 years.