气候变化领域集成服务门户(CCPortal): ENSO Teleconnections and Impacts on U.S. Summertime Temperature during a Multiyear la Niña Life Cycle

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DOI	10.1175/JCLI-D-19-0701.1
	ENSO Teleconnections and Impacts on U.S. Summertime Temperature during a Multiyear la Niña Life Cycle
	Jong B.-T.; Ting M.; Seager R.; Anderson W.B.
发表日期	2020
ISSN	0894-8755
起始页码	6009
结束页码	6024
卷号	33 期号:14
英文摘要	El Niño-Southern Oscillation (ENSO) teleconnections have been recognized as possible negative influences on crop yields in the United States during the summer growing season, especially in a developing La Niña summer. This study examines the physical processes of the ENSO summer teleconnections and remote impacts on the United States during a multiyear La Niña life cycle. Since 1950, a developing La Niña summer is either when an El Niño is transitioning to a LaNiña or when a LaNiña is persisting. Due to the distinct prior ENSO conditions, the oceanic and atmospheric characteristics in the tropics are dissimilar in these two different La Niña summers, leading to different teleconnection patterns. During the transitioning summer, the decaying El Niño and the developing La Niña induce suppressed deep convection over both the subtropical western Pacific (WP) and the tropical central Pacific (CP). Both of these two suppressed convection regions induce Rossby wave propagation extending toward North America, resulting in a statistically significant anomalous anticyclone over northeastern North America and, therefore, a robust warming signal over the Midwest. In contrast, during the persisting summer, only one suppressed convection region is present over the tropical CP induced by the La Niña SST forcing, resulting in a weak and insignificant extratropical teleconnection. Experiments from a stationary wave model confirm that the suppressed convection over the subtropicalWPduring the transitioning summer not only contributes substantially to the robust warming over the Midwest but also causes the teleconnections to be different from those in the persisting summer. © 2020 American Meteorological Society. All rights reserved.
英文关键词	Artificial life; Atmospheric pressure; Climatology; Lanthanum; Mechanical waves; Oceanography; Tropics; Wave propagation; Deep convection; Physical process; ROSSBY wave propagation; Southern oscillation; Stationary wave model; Teleconnection patterns; Teleconnections; Western Pacific; Nickel compounds; air temperature; anticyclone; atmospheric convection; El Nino; El Nino-Southern Oscillation; La Nina; Rossby wave; sea surface temperature; standing wave; summer; teleconnection; wave propagation; Midwest; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (West); United States
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/171215
作者单位	NOAA Physical Sciences Laboratory, Boulder, CO, United States; Department of Earth and Environmental Sciences, Columbia University, New York, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; International Research Institute for Climate and Society, Palisades, NY, United States
推荐引用方式 GB/T 7714	Jong B.-T.,Ting M.,Seager R.,et al. ENSO Teleconnections and Impacts on U.S. Summertime Temperature during a Multiyear la Niña Life Cycle[J],2020,33(14).
APA	Jong B.-T.,Ting M.,Seager R.,&Anderson W.B..(2020).ENSO Teleconnections and Impacts on U.S. Summertime Temperature during a Multiyear la Niña Life Cycle.Journal of Climate,33(14).
MLA	Jong B.-T.,et al."ENSO Teleconnections and Impacts on U.S. Summertime Temperature during a Multiyear la Niña Life Cycle".Journal of Climate 33.14(2020).