气候变化领域集成服务门户(CCPortal): Impact of global warming on the western North Pacific circulation anomaly during developing El Niño

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DOI	10.1175/JCLI-D-19-0588.1
	Impact of global warming on the western North Pacific circulation anomaly during developing El Niño
	Wang Y.; He C.; Li T.
发表日期	2020
ISSN	0894-8755
起始页码	2333
结束页码	2349
卷号	33 期号:6
英文摘要	El Niño stimulates an anomalous cyclone over the North Pacific during its developing phase. Using 30 CGCMs and 11 AGCMs from CMIP5, we find a weakly strengthened anomalous North Pacific cyclone (NPC) in a warmer climate in CGCMs, and intermodel uncertainty exists. A similar change of the anomalous NPC is found in AGCMs with increased mean state SST but with a stronger amplitude of enhancement. Based on a simple Gill model, the diabatic heating anomaly, mean state static stability, and meridional gradient of relative vorticity are identified to be responsible for the change of the anomalous NPC. Analyses of the CMIP5 models suggest that the change of the anomalous NPC is largely determined by the competition between the enhanced diabatic heating anomaly and the enhanced mean state static stability. The amplitude of enhancement of the anomalous NPC is strongly modulated by the change of precipitation anomaly over the equatorial central-eastern Pacific, which depends on the changes of mean state SST and the El Niño–related SST anomaly. Compared with a uniform warming, an El Niño–like mean state SST warming favors a much stronger enhancement of the anomalous NPC, by enhancing the mean state precipitation and latent heating anomaly associated with the precipitation anomaly over the equatorial Pacific. However, the air–sea coupling acts to weaken the SST anomaly associated with El Niño in the CGCMs, which further reduces the enhancement of the anomalous NPC. © 2020 American Meteorological Society.
英文关键词	Climate models; Global warming; Storms; Circulation anomalies; Diabatic heating; Equatorial Pacific; Meridional gradients; Precipitation anomalies; Relative vorticity; Static stability; Western North Pacific; Oceanography; cyclone; diabatic process; El Nino; global warming; oceanic circulation; sea surface temperature; temperature anomaly; vorticity; Pacific Ocean; Pacific Ocean (Equatorial); Pacific Ocean (North)
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/171394
作者单位	Key laboratory of Meteorological Disaster, Ministry of Education, Joint International Research Laboratory of Climate and Environmental Change, Collaborative Innovation Center on Forecast of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; International Pacific Research Center, Department of Atmospheric Sciences, School of Ocean and Earth Science and Technology, University of Hawai‘i at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Wang Y.,He C.,Li T.. Impact of global warming on the western North Pacific circulation anomaly during developing El Niño[J],2020,33(6).
APA	Wang Y.,He C.,&Li T..(2020).Impact of global warming on the western North Pacific circulation anomaly during developing El Niño.Journal of Climate,33(6).
MLA	Wang Y.,et al."Impact of global warming on the western North Pacific circulation anomaly during developing El Niño".Journal of Climate 33.6(2020).