Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming

doi:10.1088/1674-1056/24/4/049201

›› 2015, Vol. 24 ›› Issue (4): 49201-049201.doi: 10.1088/1674-1056/24/4/049201

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇下一篇

Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming

戴新刚^a, 柳晔^b, 汪萍^c

a RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
b Climate Center of Guangdong Meteorological Service, Guangzhou 510080, China;
c Chinese Academy of Meteorological Sciences, Beijing 100081, China

收稿日期:2014-09-03 修回日期:2014-10-31 出版日期:2015-04-05 发布日期:2015-04-05
基金资助:
Project supported by the National Basic Research and Development Program of China (Grant No. 2013CB430201), the National Natural Science Foundation of China (Grant Nos. 41075058 and 41475075), and the China Meteorological Administration Special Public Welfare Research Fund (Grant No. GYHY201106016).

Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming

Dai Xin-Gang (戴新刚)^a, Liu Ye (柳晔)^b, Wang Ping (汪萍)^c

a RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
b Climate Center of Guangdong Meteorological Service, Guangzhou 510080, China;
c Chinese Academy of Meteorological Sciences, Beijing 100081, China

Received:2014-09-03 Revised:2014-10-31 Online:2015-04-05 Published:2015-04-05
Contact: Liu Ye E-mail:liuye890523@163.com
Supported by:
Project supported by the National Basic Research and Development Program of China (Grant No. 2013CB430201), the National Natural Science Foundation of China (Grant Nos. 41075058 and 41475075), and the China Meteorological Administration Special Public Welfare Research Fund (Grant No. GYHY201106016).

摘要/Abstract

摘要： This study aims to investigate the recent drought in southwestern China and its association with environmental changes in moisture transport (MT) and atmospheric circulation. Climatic Research Unit grid data, in situ observations in China, and ERA-interim reanalysis are used to study the characteristics of the drought and the associated mechanism. Recent precipitation trends show a pattern of “Northern wetting and Southern drying”, similar to the anti-phase of the climate pattern prevailing during 1980-2000 in mainland China; southwestern China has incurred a severe drought during 2009-2013. Wavelet analysis reveals that the drought coincides with a warm-dry phase of temperature and precipitation on a period of about 20 years and beyond 100 years, which contributions account for 43% and 57% of the deficiency of the precipitation, averaged for 2003-2012, respectively. A further investigation reveals that the drought results chiefly from the decline of the southwestern monsoon MT toward southwestern China, in addition to mid-latitude circulation changes, which leads to more blockings near the Ural Mountains and the Sea of Okhotsk in the rainy season and negative anomalies around the Lake Baikal and Northeast China in the dry season. These anomalies are likely to be correlated with global sea surface temperature changes and need to be studied further.

关键词: southwestern drought, wavelet decomposition, monsoon moisture transport and circulation anomalies, climate warming

Abstract: This study aims to investigate the recent drought in southwestern China and its association with environmental changes in moisture transport (MT) and atmospheric circulation. Climatic Research Unit grid data, in situ observations in China, and ERA-interim reanalysis are used to study the characteristics of the drought and the associated mechanism. Recent precipitation trends show a pattern of “Northern wetting and Southern drying”, similar to the anti-phase of the climate pattern prevailing during 1980-2000 in mainland China; southwestern China has incurred a severe drought during 2009-2013. Wavelet analysis reveals that the drought coincides with a warm-dry phase of temperature and precipitation on a period of about 20 years and beyond 100 years, which contributions account for 43% and 57% of the deficiency of the precipitation, averaged for 2003-2012, respectively. A further investigation reveals that the drought results chiefly from the decline of the southwestern monsoon MT toward southwestern China, in addition to mid-latitude circulation changes, which leads to more blockings near the Ural Mountains and the Sea of Okhotsk in the rainy season and negative anomalies around the Lake Baikal and Northeast China in the dry season. These anomalies are likely to be correlated with global sea surface temperature changes and need to be studied further.

Key words: southwestern drought, wavelet decomposition, monsoon moisture transport and circulation anomalies, climate warming

中图分类号: (Climate and inter-annual variability)

92.05.Df

92.70.Gt (Climate dynamics)

戴新刚, 柳晔, 汪萍. Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming[J]. , 2015, 24(4): 49201-049201.

Dai Xin-Gang (戴新刚), Liu Ye (柳晔), Wang Ping (汪萍). Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming[J]. Chin. Phys. B, 2015, 24(4): 49201-049201.

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Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming

Warm-dry collocation of the recent drought in southwestern China tied to moisture transport and climate warming

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