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Prolonged Heavy Snowfall During the Younger Dryas

文献类型：期刊论文

作者Wang, L.1; Jiang, W. Y.1; Jiang, D. B.2,3,4; Zou, Y. F.1,4; Liu, Y. Y.5; Zhang, E. L.6; Hao, Q. Z.1,4; Zhang, D. G.7; Zhang, D. T.8; Peng, Z. Y.9
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2018-12-27
卷号123期号:24页码:13748-13762
ISSN号2169-897X
关键词Younger Dryas Heavy snowfall Diatoms AMOC ITCZ Asian summer monsoon
DOI10.1029/2018JD029271
英文摘要Snowfall is an important component of Earth's climate system; however, long, continuous high-resolution records of global snowfall are lacking because of the absence of suitable proxies. In this study, diatom record from the sediments of Yunlong Lake, in the southeastern Tibetan Plateau, was used to reconstruct snowfall during the Younger Dryas (YD). Variations in the abundance of low-light-tolerant diatoms and diatom flux indicate that the duration of lake ice cover during the YD was significantly longer than that during the colder Heinrich event 1; this suggests that heavy snowfall, rather than temperatures, was responsible for the greater duration of lake ice cover during the YD. Thus, we conclude that prolonged, heavy snowfall occurred in the southeastern Tibetan Plateau during the YD. In addition, this conclusion is supported by the results of a climate model simulation that also suggest that heavy snowfall occurred at high latitude in the Northern Hemisphere during the YD. We propose that the heavy snowfall intensified cooling in Northern Hemisphere by increasing the albedo and that it increased hydrological variability at low latitudes by increasing the duration of the southward migration of the Intertropical Convergence Zone and by delaying the onset of the Asian summer monsoon. The snowfall would have been a source of continuous freshwater that acted as a positive feedback and resulted in a prolonged weakened state of the Atlantic meridional overturning circulation, which lasted for more than 1,000years. Overall, our results emphasize the amplification and positive feedback function of heavy snowfall in triggering abrupt climate change.
WOS关键词INDIAN-SUMMER MONSOON ; INTERTROPICAL CONVERGENCE ZONE ; ASIAN WINTER MONSOON ; LAST GLACIAL MAXIMUM ; THERMOHALINE CIRCULATION ; HIGH-RESOLUTION ; OVERTURNING CIRCULATION ; OCEAN CIRCULATION ; TIBETAN PLATEAU ; CLIMATE
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41772379] ; National Natural Science Foundation of China[41372372] ; National Key R&D Program of China[2017YFA0603400]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000455876300008
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/90218]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Wang, L.
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Atmospher Phys, Nansen Zhu Int Res Ctr, Beijing, Peoples R China
3.Chinese Acad Sci, Climate Change Res Ctr, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
5.China Meteorol Adm, Meteorol Observat Ctr, Beijing, Peoples R China
6.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing, Jiangsu, Peoples R China
7.Zhejiang Univ, Sch Earth Sci, Hangzhou, Zhejiang, Peoples R China
8.China Univ Geosci, Sch Earth & Resources, Beijing, Peoples R China
9.China Geol Survey, Guangzhou Marine Geol Survey, Guangzhou, Guangdong, Peoples R China
10.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Wang, L.,Jiang, W. Y.,Jiang, D. B.,et al. Prolonged Heavy Snowfall During the Younger Dryas[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(24):13748-13762.
APA Wang, L..,Jiang, W. Y..,Jiang, D. B..,Zou, Y. F..,Liu, Y. Y..,...&Lu, H. Y..(2018).Prolonged Heavy Snowfall During the Younger Dryas.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(24),13748-13762.
MLA Wang, L.,et al."Prolonged Heavy Snowfall During the Younger Dryas".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.24(2018):13748-13762.

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来源：地质与地球物理研究所

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