气候变化领域集成服务门户(CCPortal): Winter temperature extremes in China and their possible causes

CCPortal

DOI	10.1002/joc.3525
	Winter temperature extremes in China and their possible causes
	You, Qinglong; Ren, Guoyu; Fraedrich, Klaus; Kang, Shichang; Ren, Yuyu; Wang, Pengling
发表日期	2013
ISSN	0899-8418
EISSN	1097-0088
卷号	33 期号:6
英文摘要	Cold and warm temperature extremes predominantly occurring in winter gained much more attention than mean temperatures. On the basis of daily maximum and minimum surface air temperature records at 303 meteorological stations in China, the spatial and temporal distributions of five indices for winter (DJF: December, subsequent January and February) temperature extremes are analysed during 19612003. For the majority of stations, the frequency of cold days/nights decreases by 1.33/ 2.98 and warm days/nights increases by 0.92/2.35 d/decade, respectively. Cold days/nights are significantly negatively correlated with the Arctic Oscillation (AO) index, while warm days/nights are positively correlated with the AO. The diurnal temperature range (DTR) has a declining trend with rate of 0.25 degrees C/decade and positive correlation with the AO index. Compared with other regions in China, stations in the northern China have larger trend magnitudes and stronger correlations with the AO index, and the AO can explain more than 50% of winter temperature extreme change in China. Compared with the annual basis, the winter temperature extremes have larger trend magnitudes, which reflect the rapid warming. During strongly positive AO index years, enhanced contrast tropospheric temperature (defined as the average of air temperature vertically integrated between 200 hPa and 1000 hPa based on the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis) between the north of China and the southern China weakens the East Asian winter monsoon which in turn reduces cold outbreaks in the northern and eastern China. The composites of large-scale atmospheric circulation are consistent with the asymmetrical changes of the geopotential height, zonal and meridional winds at high and mid latitudes at troposphere. Meanwhile, the linkage between the AO and solar activity also modulates the winter temperature extremes, while the mechanism needs to be investigated. Copyright (c) 2012 Royal Meteorological Society
关键词	temperature extremes Arctic Oscillation atmospheric circulation China
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111686
作者单位	Chinese Acad Sci, Lab Tibetan Environm Changes & Land Surface Proc, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	You, Qinglong,Ren, Guoyu,Fraedrich, Klaus,et al. Winter temperature extremes in China and their possible causes[J]. 中国科学院西北生态环境资源研究院,2013,33(6).
APA	You, Qinglong,Ren, Guoyu,Fraedrich, Klaus,Kang, Shichang,Ren, Yuyu,&Wang, Pengling.(2013).Winter temperature extremes in China and their possible causes.INTERNATIONAL JOURNAL OF CLIMATOLOGY,33(6).
MLA	You, Qinglong,et al."Winter temperature extremes in China and their possible causes".INTERNATIONAL JOURNAL OF CLIMATOLOGY 33.6(2013).