干旱区生态环境知识资源中心(Arid): 5月青藏高原地区感热异常对北疆夏季降水的影响

Arid

	5月青藏高原地区感热异常对北疆夏季降水的影响
其他题名	Impact of the Anomaly of Surface Sensible Heat in Qinghai-Xizang Plateau and Its Surrounding Areas on Summertime Precipitation in Northern Xinjiang
	赵勇 1; 李如琦 2; 杨霞 2; 何冬燕 3; 张超 2
来源期刊	高原气象
ISSN	1000-0534
出版年	2013
卷号	32 期号:5 页码:1215-1223
中文摘要	利用NCEP/NCAR月平均再分析资料和北疆43个气象站降水资料，分析了1961-2010年5月青藏高原地区地表感热异常与北疆夏季降水的关系。结果表明, 青藏高原主体及其东、西部（以90°E为界）地表感热与北疆夏季降水的关系有所不同，以青藏高原东部关系最优。当5月青藏高原感热偏弱、其西北侧沙漠感热偏强时，南亚高压呈双体型分布，500 hPa 中亚和贝加尔湖上空分别受异常气旋和反气旋控制，新疆上空盛行异常偏南风，有利于低纬度暖湿气流北上。同时，越赤道索马里急流加强，阿拉伯海上空为异常反气旋控制，低纬水汽向北输送加强，导致更多的北疆夏季降水; 反之亦然。
英文摘要	As well known, the surface thermal anomaly (STA) in the Qinghai-Xizang Plateau (QXP) have important influences on the climate in China. Previous studies were focused on the effects of the STA on the weather and climate in eastern monsoon regions, less attention was paid to the connection between the STA and the precipitation in arid regions, especially in Xinjiang. In this paper, the preliminary results of the relationship between the STA in QXP and summer rainfall in northern Xinjiang were given. Using the NCEP/NCAR reanalysis monthly mean data and precipitation data at 43 stations in northern Xinjiang, the relationships between the anomaly of surface sensible heat (SH) in QXP and its surrounding areas and the summer precipitation in northern Xinjiang were analyzed. The results showed the effects of the SH in the QXP, eastern QXP and western QXP (divided along 90°E) on the summer time precipitation are different and the SH in eastern QXP have the most closed relation with summer precipitation. When the SH weakened in QXP and strengthened on the northwest side of the QXP, the South Asia High has two positive centers, which is one of the most important circulation patterns for occurring more summer rainfall in northern Xinjiang, and there are an anomalous cyclone over central Asia and an anomalous anticyclone over the Baikal Lake, respectively, which results in the anomalous south wind prevailing and is favorable to the warm-wet air move from the low latitude regions. In addition, the transportation of water vapor by Somalia jet is unusually strong, passing over the Equator, and at the same time the Arabian Sea is controlled by anomalous anticyclone circulation, driving the water vapor to be transferred continuously to the central Asia and Xinjiang, so the south water vapor channel which impacted Xinjiang is strengthened significantly. Above all are contributed to the occurrence of more summer precipitation in northern Xinjiang, and vice versa.
中文关键词	青藏高原 ; 地表感热 ; 热力空间差异 ; 北疆夏季降水
英文关键词	Qinghai-Xizang Plateau Surface sensible heat Spatial thermal contrast Summertime precipitation in northern Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:4971409
来源机构	中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229688
作者单位	1.中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国; 2.新疆维吾尔自治区气象台, 乌鲁木齐, 新疆 830002, 中国; 3.安徽省气候中心, 合肥, 安徽 230031, 中国
推荐引用方式 GB/T 7714	赵勇,李如琦,杨霞,等. 5月青藏高原地区感热异常对北疆夏季降水的影响[J]. 中国气象局乌鲁木齐沙漠气象研究所,2013,32(5):1215-1223.
APA	赵勇,李如琦,杨霞,何冬燕,&张超.(2013).5月青藏高原地区感热异常对北疆夏季降水的影响.高原气象,32(5),1215-1223.
MLA	赵勇,et al."5月青藏高原地区感热异常对北疆夏季降水的影响".高原气象 32.5(2013):1215-1223.