3 results on '"Bräuning, Achim [0000-0003-3106-4229]"'
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2. The influence of decision-making in tree ring-based climate reconstructions
- Author
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Guobao Xu, Christophe Corona, Rob Wilson, Ulf Büntgen, Josef Ludescher, Kathy Allen, Dominique Arseneault, Alexander V. Kirdyanov, Wolfgang Jens-Henrik Meier, Joel Guiot, Paolo Cherubini, Markus Stoffel, Clive Oppenheimer, Björn E. Gunnarson, Sebastian Guillet, Kristina Seftigen, A. Stine, Bao Yang, A. M. Trevino, Kevin J. Anchukaitis, Matthew W. Salzer, Malcolm K. Hughes, Jianglin Wang, Scott St. George, Kurt Nicolussi, Fabio Gennaretti, Achim Bräuning, Peter Huybers, Samuli Helama, Paul J. Krusic, Olga V. Churakova (Sidorova), Jan Esper, Vladimir S. Myglan, Valerie Trouet, Ernesto Tejedor, Philipp Hochreuther, Snigdhansu Chatterjee, Jussi Grießinger, Frederick Reinig, Étienne Boucher, Büntgen, Ulf [0000-0002-3821-0818], Anchukaitis, Kevin J [0000-0002-8509-8080], Arseneault, Dominique [0000-0002-3419-2480], Bräuning, Achim [0000-0003-3106-4229], Churakova Sidorova, Olga V [0000-0002-1687-1201], Grießinger, Jussi [0000-0001-6103-2071], Helama, Samuli [0000-0002-9777-3354], Hughes, Malcolm K [0000-0003-1062-3167], Kirdyanov, Alexander V [0000-0002-6797-4964], Nicolussi, Kurt [0000-0002-1737-4119], Oppenheimer, Clive [0000-0003-4506-7260], Reinig, Frederick [0000-0001-6839-8340], Seftigen, Kristina [0000-0001-5555-5757], Stine, Alexander R [0000-0002-1676-5572], Stoffel, Markus [0000-0003-0816-1303], St George, Scott [0000-0002-0945-4944], Tejedor, Ernesto [0000-0001-6825-3870], Apollo - University of Cambridge Repository, Department of Geography, University of Cambridge, University of Cambridge [UK] (CAM), Centre de recherche sur la dynamique du système Terre (GEOTOP), Université de Montréal (UdeM)-McGill University = Université McGill [Montréal, Canada]-École Polytechnique de Montréal (EPM)-Concordia University [Montreal]-Université du Québec à Rimouski (UQAR)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Université du Québec en Abitibi-Témiscamingue (UQAT), Université du Québec en Abitibi-Témiscamingue (UQAT), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), École Polytechnique de Montréal (EPM)-McGill University = Université McGill [Montréal, Canada]-Université de Montréal (UdeM)-Université du Québec en Abitibi-Témiscamingue (UQAT)-Université du Québec à Rimouski (UQAR)-Concordia University [Montreal]-Université du Québec à Montréal = University of Québec in Montréal (UQAM), University of St Andrews. School of Earth & Environmental Sciences, University of St Andrews. Scottish Oceans Institute, Anchukaitis, Kevin J. [0000-0002-8509-8080], Churakova (Sidorova), Olga V. [0000-0002-1687-1201], Hughes, Malcolm K. [0000-0003-1062-3167], Kirdyanov, Alexander V. [0000-0002-6797-4964], Stine, Alexander R. [0000-0002-1676-5572], and St. George, Scott [0000-0002-0945-4944]
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141 ,704/106/694 ,010506 paleontology ,010504 meteorology & atmospheric sciences ,Science ,General Physics and Astronomy ,Climate change ,Palaeoclimate ,01 natural sciences ,Article ,General Biochemistry, Genetics and Molecular Biology ,Paleoclimatology ,SDG 13 - Climate Action ,Dendrochronology ,ddc:550 ,[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment ,0105 earth and related environmental sciences ,Research data ,ddc:333.7-333.9 ,13 Climate Action ,GE ,Multidisciplinary ,Northern Hemisphere ,DAS ,General Chemistry ,706/648/697 ,Geography ,13. Climate action ,Climatology ,704/106/413 ,GE Environmental Sciences - Abstract
Tree-ring chronologies underpin the majority of annually-resolved reconstructions of Common Era climate. However, they are derived using different datasets and techniques, the ramifications of which have hitherto been little explored. Here, we report the results of a double-blind experiment that yielded 15 Northern Hemisphere summer temperature reconstructions from a common network of regional tree-ring width datasets. Taken together as an ensemble, the Common Era reconstruction mean correlates with instrumental temperatures from 1794–2016 CE at 0.79 (p, Tree rings are a crucial archive for Common Era climate reconstructions, but the degree to which methodological decisions influence outcomes is not well known. Here, the authors show how different approaches taken by 15 different groups influence the ensemble temperature reconstruction from the same data.
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- 2021
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3. Long-term decrease in Asian monsoon rainfall and abrupt climate change events over the past 6,700 years
- Author
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Guanghui Dong, Valerie Trouet, Mi Yan, Nils Chr. Stenseth, Jianglin Wang, Chun Qin, Ulf Büntgen, Juerg Luterbacher, Liang Ning, Suming Wang, Jussi Grießinger, Bao Yang, Achim Bräuning, Sergio Rossi, Timothy J. Osborn, Jan Esper, Fredrik Charpentier Ljungqvist, Edward R. Cook, Xiaofeng Wang, Lea Schneider, Yang, Bao [0000-0002-1063-351X], Qin, Chun [0000-0003-3115-2376], Bräuning, Achim [0000-0003-3106-4229], Osborn, Timothy J [0000-0001-8425-6799], Trouet, Valerie [0000-0002-2683-8704], Ljungqvist, Fredrik Charpentier [0000-0003-0220-3947], Schneider, Lea [0000-0002-8208-7300], Grießinger, Jussi [0000-0001-6103-2071], Büntgen, Ulf [0000-0002-3821-0818], Yan, Mi [0000-0003-4730-3781], Wang, Xiaofeng [0000-0002-7476-2206], Stenseth, Nils Chr [0000-0002-1591-5399], and Apollo - University of Cambridge Repository
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climate variability ,Climate Research ,010504 meteorology & atmospheric sciences ,Social Sciences ,stable isotopes ,010502 geochemistry & geophysics ,01 natural sciences ,Klimatforskning ,megadrought ,East Asian Monsoon ,Precipitation ,Holocene ,0105 earth and related environmental sciences ,geography ,Multidisciplinary ,Plateau ,geography.geographical_feature_category ,variability ,Asian summer monsoon ,Biological Sciences ,tree rings ,Aridification ,Abrupt climate change ,Physical geography ,Megadrought ,Environmental Sciences ,Chronology - Abstract
Significance The variability of the Asian summer monsoon (ASM) is important for the functioning of ecological and societal systems at regional to continental scales, but the long-term evolution and interannual variability of this system is not well understood. Here, we present a stable isotope–based reconstruction of ASM variability covering 4680 BCE to 2011 CE. Superimposed on a gradual drying trend, a rapid drop in mean annual precipitation (>40%) toward persistently drier conditions occurred in ∼1675 BCE. This megadrought caused regional forest deterioration and enhanced aeolian activity affecting Chinese ecosystems. We argue that this abrupt aridification starting ∼2000 BCE triggered waves of human migration and societal transformation in northern China, which contributed to the alteration of spatial pattern of ancient civilizations., Asian summer monsoon (ASM) variability and its long-term ecological and societal impacts extending back to Neolithic times are poorly understood due to a lack of high-resolution climate proxy data. Here, we present a precisely dated and well-calibrated tree-ring stable isotope chronology from the Tibetan Plateau with 1- to 5-y resolution that reflects high- to low-frequency ASM variability from 4680 BCE to 2011 CE. Superimposed on a persistent drying trend since the mid-Holocene, a rapid decrease in moisture availability between ∼2000 and ∼1500 BCE caused a dry hydroclimatic regime from ∼1675 to ∼1185 BCE, with mean precipitation estimated at 42 ± 4% and 5 ± 2% lower than during the mid-Holocene and the instrumental period, respectively. This second-millennium–BCE megadrought marks the mid-to late Holocene transition, during which regional forests declined and enhanced aeolian activity affected northern Chinese ecosystems. We argue that this abrupt aridification starting ∼2000 BCE contributed to the shift of Neolithic cultures in northern China and likely triggered human migration and societal transformation.
- Published
- 2021
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