干旱区生态环境知识资源中心(Arid): 气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅰ)--地表干湿状况时空演变特征分析

Arid

	气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅰ)--地表干湿状况时空演变特征分析
其他题名	Effect of climate change on net primary productivity(NPP) of natural vegetation in Wei river basin(Ⅰ).Temporal and spatial characteristics of dry-wet condition
	蒋冲; 王飞; 穆兴民; 李锐
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2013
卷号	27 期号:4 页码:30-36
中文摘要	采用1959~2010年23个气象站的逐日气象资料,利用FAO Penman-Monteith公式计算出渭河流域各气象站的潜在蒸散量,由此计算出各站的湿润指数。采用样条曲线插值法(Spline)、气候倾向率、标准化指数、相关分析等方法对流域湿润指数的时空变化特征以及影响其变化的气象要素进行了分析。结果表明:近52a渭河流域地表湿润指数整体下降,由南向北干旱程度逐渐增加。北部黄土高原丘陵沟壑区最干,南部秦岭山地和关中地区最湿。湿润指数年际间波动较大,与潜在蒸散量的变化趋势呈反相位关系,泾河和北洛河流域干湿分布规律与渭河流域整体类似。干旱化速率较大的为华山和宝鸡,关中部分地区微弱变湿。流域整体在春季和秋季变干,夏季除关中和陇东部分地区外也逐渐变干,冬季呈变湿趋势。影响湿润指数的因素主要为降水(正相关)和温度(负相关),风速的增加也会加剧干旱化的趋势。
英文摘要	Based on the daily data of 23 meteorological stations from 1959 to 2010,the potential evaporation (ET_0) was calculated using the Food and Agriculture Organization (FAO) Penman - Monteith model,and then the humid index in the Wei river basin was reconstructed from the ET0. With the method of spline interpolation, climatic trend rate,normalized ratio and correlation analysis,etc,the temporal and spatial variations of humid index and extreme arid and wet event,as well as its influential factors were discussed. The results indicated that the humid index decreased in the last 52 years,drought phenomenon increased gradually from south to North, with the driest condition in the loess hilly gully region and the wettest condition in Guanzhong Region and Qin Mountain. The inter annual fluctuations of humid index was very significant and change trend of extreme points presented a antiphase relation corresponding to the potential evaporation. Jing River and North Luo River had the similar dry - wet condition to Wei River Basin. Drying rate was larger for the Hua Mountain and Baoji, Guanzhong Region presented a trend of becoming wet. There was a positive correlation with precipitation and relative humidity,and negative correlation with sunshine duration,potential evaporation and wind speed.
中文关键词	渭河流域 ; 湿润指数 ; Penman-Monteith模型 ; 空间分布 ; 影响因素
英文关键词	Wei river basin humidity index Penman-Monteith model spatial distribution extreme arid and wet event influential factor
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:4776746
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229628
作者单位	西北农林科技大学资源环境学院, 杨凌, 712100
推荐引用方式 GB/T 7714	蒋冲,王飞,穆兴民,等. 气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅰ)--地表干湿状况时空演变特征分析[J]. 西北农林科技大学,2013,27(4):30-36.
APA	蒋冲,王飞,穆兴民,&李锐.(2013).气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅰ)--地表干湿状况时空演变特征分析.干旱区资源与环境,27(4),30-36.
MLA	蒋冲,et al."气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅰ)--地表干湿状况时空演变特征分析".干旱区资源与环境 27.4(2013):30-36.