Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau)
Knowing the evolution history of the climate systems in the Asian inland dominated by either the Westerlies or the Asian monsoon, and understanding their associated driving mechanisms are crucial for assessing future trends of climate and environmental conditions in this region, but both the evoluti...
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2019
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.904354 https://doi.org/10.1594/PANGAEA.904354 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.904354 2023-05-15T16:41:36+02:00 Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) Appel, Erwin Herb, Christian Fang, Xiaomin Han, Wenxia Rösler, Wolfgang Wang, Jiuyi Yang, Yibo LATITUDE: 38.409700 * LONGITUDE: 92.509200 2019-11-05 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.904354 https://doi.org/10.1594/PANGAEA.904354 en eng PANGAEA Han, Wenxia; Appel, Erwin; Galy, Albert; Rösler, Wolfgang; Fang, Xiaomin; Zhu, Xiaomin; Vandenberghe, Jef; Wang, Jiuyi; Berger, André; Lü, Shuang; Zhang, Tao (2020): Climate transition in the Asia inland at 0.8–0.6 Ma related to astronomically forced ice sheet expansion. Quaternary Science Reviews, 248, 106580, https://doi.org/10.1016/j.quascirev.2020.106580 https://doi.pangaea.de/10.1594/PANGAEA.904354 https://doi.org/10.1594/PANGAEA.904354 CC-BY-NC-SA-4.0: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY-NC-SA CAME-II_Q-TIP carbon & oxygen isotopes chemical elements Crossing Climatic Tipping Points - Consequences for Central Asia DRILL Drilling/drill rig Grain Size magnetic susceptibility Qaidam Basin Qaidam paleolake SG-1 Tibetan Plateau Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.904354 https://doi.org/10.1016/j.quascirev.2020.106580 2023-01-20T07:34:22Z Knowing the evolution history of the climate systems in the Asian inland dominated by either the Westerlies or the Asian monsoon, and understanding their associated driving mechanisms are crucial for assessing future trends of climate and environmental conditions in this region, but both the evolution and mechanisms are still under debate. In this study, we present a comparative analysis of massive data from an accurately dated drill core retrieved from the Westerlies controlled western Qaidam Basin (QB), with records from the Chinese Loess Plateau (CLP) dominated by the East Asia summer monsoon (EASM), to track the time and frequency domain evolution patterns and dynamic changes of the QB and the CLP systems. The results infer two main conclusions. First, a critical transition in the evolution of Qaidam paleolake occurred at 0.8-0.6 Ma, characterized by striking changes in proxy variations and a system shift from periodic variations to more irregular fluctuations after 0.6 Ma. Second, a similar evolution pattern prevailed in the Qaidam paleolake region and in the EASM-dominated CLP between ~2.7 to ~1.2 Ma, but a divergence of both systems started at ~1.2 Ma and fully established after 0.6 Ma, when largely fluctuating climate conditions in the QB with a distinct drying trend was accompanied by synchronous largely fluctuated EASM with an increasing trend after 0.6 Ma. We suggest that ice sheet expansion in the Northern Hemisphere, promoted by co-occurrence of low obliquity amplitudes and low eccentricity, drove both systems across a threshold at ~1.2 Ma, and the internal forcing due to glaciation disturbed the previous response of both systems to solar insolation and led to the divergence of two systems. At ~0.9-0.8 Ma, a node of the 1.2-Myr obliquity cycle co-occurred with an eccentricity minimum, which together with coeval decrease in atmospheric CO2 concentration, could have facilitated a striking expansion of ice sheets. The resulting more equatorial and zonally oriented northern hemisphere westerly jet could ... Dataset Ice Sheet PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(92.509200,92.509200,38.409700,38.409700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
CAME-II_Q-TIP carbon & oxygen isotopes chemical elements Crossing Climatic Tipping Points - Consequences for Central Asia DRILL Drilling/drill rig Grain Size magnetic susceptibility Qaidam Basin Qaidam paleolake SG-1 Tibetan Plateau |
spellingShingle |
CAME-II_Q-TIP carbon & oxygen isotopes chemical elements Crossing Climatic Tipping Points - Consequences for Central Asia DRILL Drilling/drill rig Grain Size magnetic susceptibility Qaidam Basin Qaidam paleolake SG-1 Tibetan Plateau Appel, Erwin Herb, Christian Fang, Xiaomin Han, Wenxia Rösler, Wolfgang Wang, Jiuyi Yang, Yibo Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
topic_facet |
CAME-II_Q-TIP carbon & oxygen isotopes chemical elements Crossing Climatic Tipping Points - Consequences for Central Asia DRILL Drilling/drill rig Grain Size magnetic susceptibility Qaidam Basin Qaidam paleolake SG-1 Tibetan Plateau |
description |
Knowing the evolution history of the climate systems in the Asian inland dominated by either the Westerlies or the Asian monsoon, and understanding their associated driving mechanisms are crucial for assessing future trends of climate and environmental conditions in this region, but both the evolution and mechanisms are still under debate. In this study, we present a comparative analysis of massive data from an accurately dated drill core retrieved from the Westerlies controlled western Qaidam Basin (QB), with records from the Chinese Loess Plateau (CLP) dominated by the East Asia summer monsoon (EASM), to track the time and frequency domain evolution patterns and dynamic changes of the QB and the CLP systems. The results infer two main conclusions. First, a critical transition in the evolution of Qaidam paleolake occurred at 0.8-0.6 Ma, characterized by striking changes in proxy variations and a system shift from periodic variations to more irregular fluctuations after 0.6 Ma. Second, a similar evolution pattern prevailed in the Qaidam paleolake region and in the EASM-dominated CLP between ~2.7 to ~1.2 Ma, but a divergence of both systems started at ~1.2 Ma and fully established after 0.6 Ma, when largely fluctuating climate conditions in the QB with a distinct drying trend was accompanied by synchronous largely fluctuated EASM with an increasing trend after 0.6 Ma. We suggest that ice sheet expansion in the Northern Hemisphere, promoted by co-occurrence of low obliquity amplitudes and low eccentricity, drove both systems across a threshold at ~1.2 Ma, and the internal forcing due to glaciation disturbed the previous response of both systems to solar insolation and led to the divergence of two systems. At ~0.9-0.8 Ma, a node of the 1.2-Myr obliquity cycle co-occurred with an eccentricity minimum, which together with coeval decrease in atmospheric CO2 concentration, could have facilitated a striking expansion of ice sheets. The resulting more equatorial and zonally oriented northern hemisphere westerly jet could ... |
format |
Dataset |
author |
Appel, Erwin Herb, Christian Fang, Xiaomin Han, Wenxia Rösler, Wolfgang Wang, Jiuyi Yang, Yibo |
author_facet |
Appel, Erwin Herb, Christian Fang, Xiaomin Han, Wenxia Rösler, Wolfgang Wang, Jiuyi Yang, Yibo |
author_sort |
Appel, Erwin |
title |
Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
title_short |
Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
title_full |
Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
title_fullStr |
Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
title_full_unstemmed |
Climate proxy data from SG-1 drill core (2.69-0.08 Ma; Qaidam Basin, NE Tibetan Plateau) |
title_sort |
climate proxy data from sg-1 drill core (2.69-0.08 ma; qaidam basin, ne tibetan plateau) |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.904354 https://doi.org/10.1594/PANGAEA.904354 |
op_coverage |
LATITUDE: 38.409700 * LONGITUDE: 92.509200 |
long_lat |
ENVELOPE(92.509200,92.509200,38.409700,38.409700) |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Han, Wenxia; Appel, Erwin; Galy, Albert; Rösler, Wolfgang; Fang, Xiaomin; Zhu, Xiaomin; Vandenberghe, Jef; Wang, Jiuyi; Berger, André; Lü, Shuang; Zhang, Tao (2020): Climate transition in the Asia inland at 0.8–0.6 Ma related to astronomically forced ice sheet expansion. Quaternary Science Reviews, 248, 106580, https://doi.org/10.1016/j.quascirev.2020.106580 https://doi.pangaea.de/10.1594/PANGAEA.904354 https://doi.org/10.1594/PANGAEA.904354 |
op_rights |
CC-BY-NC-SA-4.0: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1594/PANGAEA.904354 https://doi.org/10.1016/j.quascirev.2020.106580 |
_version_ |
1766032056261804032 |