DOI: 10.1175/JCLI-D-19-0588.1
论文题名: Impact of global warming on the western North Pacific circulation anomaly during developing El Niño
作者: Wang Y. ; He C. ; Li T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2020
卷: 33, 期: 6 语种: 英语
Scopus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)
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158684
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Wang Y.,He C.,Li T.. Impact of global warming on the western North Pacific circulation anomaly during developing El Niño[J]. Journal of Climate,2020-01-01,33(6)