气候变化领域集成服务门户(CCPortal): Interdecadal variations of the East Asian winter monsoon in CMIP5 preindustrial simulations

CCPortal

DOI	10.1175/JCLI-D-19-0148.1
	Interdecadal variations of the East Asian winter monsoon in CMIP5 preindustrial simulations
	Miao J.; Wang T.; Wang H.
发表日期	2020
ISSN	0894-8755
起始页码	559
结束页码	575
卷号	33 期号:2
英文摘要	In this study, focusing on the interdecadal time scale, we investigate the internal variability of the East Asian winter monsoon (EAWM) using output from 19 coupled models' long-term preindustrial control (piControl) simulations within phase 5 of the Coupled Model Intercomparison Program (CMIP5). In total, we identify 53 cases of significant interdecadal weakening of the EAWM from these 19 piControl simulations. In most weakening cases, both the Siberian high and the East Asian trough are significantly weakened. The East Asian jet stream in the upper troposphere shifts poleward. Southerly wind anomalies are evident over East Asia in the lower troposphere. At the same time, both the Arctic Oscillation (AO) and the North Pacific Oscillation are in their positive phases. Associated anomalous anticyclonic circulation can be found over the North Pacific. Additionally, the North Pacific shows negative Pacific decadal oscillation (PDO)-like sea surface temperature (SST) anomalies. In contrast, we also analyzed 49 cases of significant strengthening of the EAWM, and the atmospheric and oceanic anomalies show opposite signals with the weakening cases. This suggests that internal variabilities of the climate system can also cause interdecadal variations of the EAWM. In addition, the phase shifting of the AO is likely the main reason for the EAWM's interdecadal variations in the unforced long-term simulations. Further numerical experiments using the Community Atmosphere Model, version 4 (CAM4), deny the causal relationship between the interdecadal variations of EAWM and PDO-like SST anomalies. This study also implies that the internal variabilities of the climate system could contribute to the observed interdecadal weakening of the EAWM around the mid-1980s. © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric thermodynamics; Climate models; Surface waters; Troposphere; Anticyclonic circulation; Community atmosphere model; Coupled model intercomparison programs; East asian jet streams; East Asian winter monsoon; Inter-decadal variations; Pacific decadal oscillation; Sea surface temperature anomalies; Oceanography; anticyclone; Arctic Oscillation; climate modeling; decadal variation; jet stream; monsoon; Pacific Decadal Oscillation; sea surface temperature; troposphere; winter; Far East; Pacific Ocean; 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/171500
作者单位	Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Joint Laboratory for Climate and Environmental Change, Chengdu University of Information Technology, Chengdu, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China; Climate Change Research Center, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Miao J.,Wang T.,Wang H.. Interdecadal variations of the East Asian winter monsoon in CMIP5 preindustrial simulations[J],2020,33(2).
APA	Miao J.,Wang T.,&Wang H..(2020).Interdecadal variations of the East Asian winter monsoon in CMIP5 preindustrial simulations.Journal of Climate,33(2).
MLA	Miao J.,et al."Interdecadal variations of the East Asian winter monsoon in CMIP5 preindustrial simulations".Journal of Climate 33.2(2020).