气候变化领域集成服务门户(CCPortal): The weakening and eastward movement of ENSO impacts during the last glacial maximum

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DOI	10.2196/10.1175/JCLI-D-19-0728.1
	The weakening and eastward movement of ENSO impacts during the last glacial maximum
	Liu S.; Jiang D.; Lang X.
发表日期	2020
ISSN	0894-8755
起始页码	5507
结束页码	5526
卷号	33 期号:3
英文摘要	The assumption of a stationary global signal linked to El Niño-Southern Oscillation (ENSO) events is often used in paleo-ENSO proxy data interpretation. This paper attempts to investigate whether the assumption is valid during the last glacial maximum (LGM) over the region 608S-908N, 608E2608W. Using four models within phase 3 of the Paleoclimate Modeling Intercomparison Project framework that well reproduce ENSOinduced variabilities, differences from the preindustrial period to LGM in the ENSO-related sea surface temperature pattern and its impacts are investigated. Compared to the preindustrial period, the ENSO impacts are revealed to weaken and shift eastward during the LGM. According to multimodel medians, ENSO impacts on precipitation and near-surface air temperature are attenuated over most regions of concern, with percentage changes in both parameters averaging 221% for the whole region; the ENSO-induced Pacific- North America (PNA) teleconnection pattern is weakened, manifested by the 41% diminished center over the North Pacific and the almost vanished activity centers over the continent. Spatially, there is a zonal contraction of 138 for the sea surface warming of ENSO, as well as eastward migration over 108 for the ENSOinduced positive precipitation anomaly center over the tropical Pacific and the PNA teleconnection pattern outside the tropics. The aforementioned changes are linked to the altered climatic background during the LGM, which features a 168 eastward shift for the Pacific Walker circulation rising branch and a weakened waveguide in the midlatitudes. The results suggest that the hypothesis of stationary ENSO impacts should be applied cautiously to the past. © 2020 American Meteorological Society.
英文关键词	Atmospheric pressure; Atmospheric temperature; Glacial geology; Oceanography; Surface waters; Tropics; Last Glacial Maximum; Model inter comparisons; Near surface air temperature; Pacific-north america; Precipitation anomalies; Sea surface temperature (SST); Southern oscillation; Teleconnection patterns; Climatology; air temperature; CMIP; data interpretation; El Nino-Southern Oscillation; Last Glacial Maximum; paleoclimate; precipitation (climatology); sea surface temperature; teleconnection; Walker circulation; North America; Pacific Ocean; Pomatiopsis californica
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171248
作者单位	Institute of Atmospheric Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
推荐引用方式 GB/T 7714	Liu S.,Jiang D.,Lang X.. The weakening and eastward movement of ENSO impacts during the last glacial maximum[J],2020,33(3).
APA	Liu S.,Jiang D.,&Lang X..(2020).The weakening and eastward movement of ENSO impacts during the last glacial maximum.Journal of Climate,33(3).
MLA	Liu S.,et al."The weakening and eastward movement of ENSO impacts during the last glacial maximum".Journal of Climate 33.3(2020).