干旱区生态环境知识资源中心(Arid): 准噶尔盆地南缘降水脉冲量级分布及其变化规律

Arid

	准噶尔盆地南缘降水脉冲量级分布及其变化规律
其他题名	Distribution and Change of Different Precipitation Pulse Sizes in the Southern Marginal Zone of the Junggar Basin,China
	郑新倩 1; 郑新军 2; 李彦1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2012
卷号	29 期号:3 页码:495-502
中文摘要	对干旱区降水脉冲发生规律的分析，将为理解荒漠生态系统结构与功能提供新的视野。选择准噶尔盆地南缘的温泉、精河、乌苏、蔡家湖、奇台和巴里坤6个气象站近50多年的逐日降水资料，分析不同量级降水脉冲对年总降水频次和降水量的贡献以及变化规律。结果表明：小降水脉冲(≤5 mm)占到全年总降水频次的87.5%，而大降水脉冲(>10 mm)只占到了4.3%。然而，小降水脉冲对年降水量的贡献为47.5%，大降水脉冲却贡献26.6%。近50多年来，准噶尔盆地南缘的年降水量有显著增加，但是，年降水频次的变化却不显著。这可以归结为小脉冲呈下降趋势，而大脉冲则显著增加。总之，近50多年来，准噶尔盆地南缘的降水脉冲在放大。
英文摘要	The "pulse-reserve" conceptual model was one of the most-cited paradigms to study the eco-process triggered by precipitation pulse in water-controlled ecosystem in the past decades,giving people a new scope to understand the relationship between precipitation and structure and function of desert ecosystem in arid area.In this paper,different sizes of precipitation pulse events contributing to annual precipitation and its frequency as well as its change in the marginal zone of the Junggar Basin,China were analyzed based on the daily precipitation data observed at 6 meteorological stations in the study area.The results showed that the proportion of low precipitation pulse event size(lower than or equal to 5 mm) was as high as 87.5%,while that of high one(higher than 10 mm) was only 4.3% of the total annual precipitation pulse frequency.However,the contribution rates of low and high precipitation pulse event sizes to annual precipitation were 47.5% and 26.6% respectively.In the past 50 years,annual precipitation was increased significantly,but the change of annual precipitation frequency was not significant.It could be explained that the low precipitation pulse event size was in a decrease trend,but the high one was in a significant increase trend.Anyway,the precipitation pulse event sizes in the marginal zone of the Junggar Basin were amplified in the past 50 years.
中文关键词	气候变化 ; 降水脉冲 ; 干旱区 ; 荒漠生态系统 ; 准噶尔盆地
英文关键词	climate change precipitation pulse arid region desert ecosystem Junggar Basin
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:4536255
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228041
作者单位	1.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院新疆生态与地理研究所阜康荒漠生态系统研究站, 阜康, 新疆 831500, 中国
推荐引用方式 GB/T 7714	郑新倩,郑新军,李彦. 准噶尔盆地南缘降水脉冲量级分布及其变化规律[J]. 中国科学院新疆生态与地理研究所,2012,29(3):495-502.
APA	郑新倩,郑新军,&李彦.(2012).准噶尔盆地南缘降水脉冲量级分布及其变化规律.干旱区研究,29(3),495-502.
MLA	郑新倩,et al."准噶尔盆地南缘降水脉冲量级分布及其变化规律".干旱区研究 29.3(2012):495-502.