气候变化领域集成服务门户(CCPortal): North atlantic modulation of interdecadal variations in hot drought events over northeastern China

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DOI	10.1175/JCLI-D-19-0440.1
	North atlantic modulation of interdecadal variations in hot drought events over northeastern China
	Huixin L.I.; Shengping H.E.; Yongqi G.A.O.; Chen H.; Wang H.
发表日期	2020
ISSN	0894-8755
起始页码	4315
结束页码	4332
卷号	33 期号:10
英文摘要	Based on the long-term reanalysis datasets and the multivariate copula method, this study reveals that the frequency of summer hot drought events (SHDEs) over northeastern China (NEC) shows interdecadal variations during 1925-2010. It is revealed that the summer sea surface temperature (SST) over the North Atlantic has a significant positive correlation with the frequency of SHDEs over NEC on the decadal time scale, indicating a potential influence of the Atlantic multidecadal oscillation (AMO). Further analyses indicate that during the positive phases of the AMO, the warming SST over the North Atlantic can trigger a stationary Rossby wave originating from the North Atlantic, which splits into two wave trains propagating along two different routes. One is a zonally orientated wave train that resembles the Silk Road pattern, whereas the other is an arching wave train that resembles the polar-Eurasian pattern. A negative (positive) phase of the Silk Road pattern (polar-Eurasian pattern) may result in the weakened westerly wind along the jet stream, the downward vertical motion, and the anomalous positive geopotential center over NEC, providing favorable conditions for precipitation deficiency and high temperature and resulting in increased SHDEs. Thus, the Silk Road pattern and the polar-Eurasian pattern serve as linkages between the AMO and SHDEs over northeastern China in summer on the interdecadal time scale. Model simulations from CAM4 perturbed with warmer SST in the North Atlantic show precipitation deficiency and high temperature conditions over northeastern China in summer, supporting the potential impacts of the North Atlantic SST on SHDEs over northeastern China. The results suggest that the phase of the AMO should be taken into account in the decadal prediction of SHDEs over northeastern China in summer. © 2020 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	Drought; Mechanical waves; Roads and streets; Silk; Surface waters; Atlantic multidecadal oscillations; Decadal predictions; Decadal timescale; Favorable conditions; High temperature condition; Inter-decadal variations; Positive correlations; Summer sea-surface temperatures; Oceanography; data set; decadal variation; drought; jet stream; multivariate analysis; Rossby wave; sea surface temperature; summer; warming; wave propagation; westerly; Atlantic Ocean; Atlantic Ocean (North); China
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/171327
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disasters, Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Nanjing University of Information Science and Technology, Nanjing, China; Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Climate Change Research Center, Chinese Academy of Sciences, Beijing, China; Nansen Environmental and Remote Sensing Center, Bjerknes Centre for Climate Research, Bergen, Norway; Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorolog...
推荐引用方式 GB/T 7714	Huixin L.I.,Shengping H.E.,Yongqi G.A.O.,et al. North atlantic modulation of interdecadal variations in hot drought events over northeastern China[J],2020,33(10).
APA	Huixin L.I.,Shengping H.E.,Yongqi G.A.O.,Chen H.,&Wang H..(2020).North atlantic modulation of interdecadal variations in hot drought events over northeastern China.Journal of Climate,33(10).
MLA	Huixin L.I.,et al."North atlantic modulation of interdecadal variations in hot drought events over northeastern China".Journal of Climate 33.10(2020).