干旱区生态环境知识资源中心(Arid): 印度洋SSTA对西北夏季空中可降水量的影响研究

Arid

	印度洋SSTA对西北夏季空中可降水量的影响研究
其他题名	Indian Ocean SSTA influence on atmosphere probable precipitation in northwest China
	杨金虎 1; 王鹏祥 1; 白志虎 1; 姚玉璧 2
ISSN	1000-6060
出版年	2009
卷号	32 期号:3 页码:373-380
中文摘要	利用近50年NCEP再分析月平均高度场、风场、地面气压,比湿以及NOAA重构海表温度资料,运用SVD及合成分析等方法,研究了印度洋SSTA对我国西北地区夏季空中可降水量的影响,结果表明前期秋季印度洋海温异常对预测夏季中国西北空中可降水量的变化特征具有明确的指示意义,而且关键区主要在赤道印度洋,如果印度洋秋季海温异常偏暖,则中国西北夏季空中可降水量异常偏少,反之亦然.同时发现由于印度洋秋季海温近50年有变暖趋势,使得中国西北夏季空中可降水量呈变少趋势.另外通过分析还发现,若印度洋秋季海温异常偏冷(暖),中国大陆上空从同期秋季到后期夏季500 hPa高度场呈西低(高)东高(低)型,这样新疆有明显偏弱(强),而期间南压夏季风也强(弱)于常年.冬季风弱(强)于常年,后期夏季我国西北地区东北部有异常偏强(弱)的偏南的水汽输送,使得空中可降水量异常偏多(少).
英文摘要	Because of shortage of enough moisture, drought is main nature disaster in the Northwest of China, in addition desert, Gobi and exposed ground cause fast evaporation, accordingly aggravate drought intensity. In the recent years, along with nation economy construction emphases gradually lean to west China, more and more drought climate of west China was quite concerned, thereinto many experts research drought of northwest China in terms of atmosphere precipitation, in fact the formation of drought climate has affinity with the lack of air water va-por , thus some experts start to concern characteristics of air water vapor of northwest China, such as He Jinhai and Yu Yaxun et al. , though many works were done about air water resource over northwest China, but the impact of sea temperature abnormity on air water resource was less touched on. The Indian Ocnean is a main water vapor source of west China, so the paper aims at the research on the Indian Ocean SSTA influence on atmosphere proba-ble precipitation of northwest China. In order to provide the scientific foundation for utilizing air water resource in the arid area, it is necessary to clear up the drought climate regularities. Using monthly mean NCEP to reanalysis height fields, wind fields, surface pressure, specific humidity and NOAA to reconstruct sea surface temperature, and with the help of SVD, composite analysis methods, the Indian Ocean autumn SSTA influence was studied on anaphase summer atmosphere probable precipitation of northwest China. The result shows that there is a clear indi-cation sense for autumn SSTA of the Indian Ocean to forecast anaphase summer atmosphere probable precipitation of northwest China, and its key areas is located on equator Indian Ocean. If autumn SST is warm in the Indian O-cean, anaphase summer atmosphere probable precipitation leans towards abnormally few, vice versa. It is found that there is a warm-up trend in the Indian Ocean in recent 50a,which causes atmosphere probable precipitation of northwest China to tail off. In addition it is proved that in autumn SST anomaly cold (warm) decade of the Indian Ocean, 500 hPa shows low (high) in west and high (low) in east pattern from autumn to anaphase summer in Chi-na, and Xinjiang ridge leans towards weak (strong) , south Asia summer monsoon strong (weak) than that of aver-age year, and south Asia winter monsoon weak (strong) than that of average year, northwards vapor transportation strong (weak) than that of average year in anaphase summer over northwest China, causing summer atmosphere probable precipitation more (few) than that of average year.
中文关键词	印度洋SSTA ; 西北 ; 空中可降水量
英文关键词	the Indian Ocean SSTA northwest China atmosphere probable precipitation
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:3761620
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223550
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.甘肃省定西市气象局, 定西, 甘肃 743000, 中国
推荐引用方式 GB/T 7714	杨金虎,王鹏祥,白志虎,等. 印度洋SSTA对西北夏季空中可降水量的影响研究[J]. 中国气象局兰州干旱气象研究所,2009,32(3):373-380.
APA	杨金虎,王鹏祥,白志虎,&姚玉璧.(2009).印度洋SSTA对西北夏季空中可降水量的影响研究.,32(3),373-380.
MLA	杨金虎,et al."印度洋SSTA对西北夏季空中可降水量的影响研究".32.3(2009):373-380.