1960-2011年河西走廊地表干湿状况的时空变化及影响因素
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国家自然科学基金项目"制度非均衡供给与后进转型:渐进制度改革背景下的中国西部城市生长转型的格局、模式与动力机制"(41171143)


Temporal and Spatial Variation of Humidity and Its Influential Factors in Hexi Corridor During 1960-2011
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    [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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刘扬,杨永春,张轲,孙彦猛.1960-2011年河西走廊地表干湿状况的时空变化及影响因素[J].水土保持通报,2015,35(1):54-60

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  • 收稿日期:2013-12-06
  • 最后修改日期:2014-01-10
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  • 在线发布日期: 2016-04-05
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