Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011

LIU Yang; YANG Yongchun; ZHANG Ke; SUN Yanmeng

doi:10.13961/j.cnki.stbctb.2015.01.011

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Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011

- Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011
- Bulletin of Soiland Water Conservation Vol. 35, Issue 1, Pages: 54-60(2015)
- 作者机构：
  
  1. 兰州大学资源环境学院,甘肃,兰州,730000
  2. 兰州大学西部环境教育部重点实验室,甘肃,兰州,730000
  3. 兰州大学信息科学与工程学院,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.01.011
  CLC：
- Published：2015
- 稿件说明：
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LIU Yang, YANG Yongchun, ZHANG Ke, et al. Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 54-60.
DOI：

LIU Yang, YANG Yongchun, ZHANG Ke, et al. Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 54-60. DOI： 10.13961/j.cnki.stbctb.2015.01.011.

摘要

[目的] 为了探讨河西走廊地区地表干湿状况对气候变化的响应。[方法] 利用河西走廊地区14个气象站1960-2011年逐日气象数据

基于FAO推荐的Penman-Monteith模型计算河西走廊各气象站的参考蒸散量和湿润指数

采用Sen's斜率和Mann-Kendall趋势检验方法

分析河西地区地表干湿的时空变化特征

探讨影响湿润指数变化的主导因子。[结果] 河西走廊地表多年平均干湿指数为0.00~0.56

且52 a来河西走廊湿润指数整体呈增加趋势;湿润指数的变化具有明显地域性差异。各季节湿润指数亦整体呈增加趋势

以冬季增幅最大

秋、春次之

而夏季变化最小。[结论] 河西走廊地区气候属于干旱

52 a来湿润指数略有增大

其主要原因是降水的增加和风速的减小。

Abstract

[Objective] To explore the response of land surface humidity to the regional climate change in Hexi Corridor.[Methods] The daily meteorological data from 14 stations during the period from 1960 to 2011 were used to calculate the referential evapotranspiration and humid index for each site based on the Penman-Monteith model. The Sen's slope and Mann-Kendall trend test were used to analyze the temporal and spatial variation of humidity and its influential factors in the study area.[Results] The humid index of Hexi Corridor was around 0.00~0.56

and the humid index increased during the past 52 years. The humidity conditions showed a spatial variation due to the differences in climate and terrain. The seasonal humid index showed an increasing trend as a whole

with the greatest increases in winter

while smallest changes in summer.[Conclusion] Hexi Corridor is subject to arid climate

while the humid index increased slightly in the past 52 years due to the increase in precipitation and decrease in wind speed.

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