LIU Lin,ZHANG Zhengyong,YAN Qiao.Spatiotemporal Changes of Potential Evaporation of the Northern Slope in Tianshan Mountains[J].Research of Soil and Water Conservation,2015,22(05):306-311.
天山北坡潜在蒸发量时空分布特征
- Title:
- Spatiotemporal Changes of Potential Evaporation of the Northern Slope in Tianshan Mountains
- 关键词:
- 潜在蒸发量; 时空分异; 天山北坡; Penman-Monteith 模型
- Keywords:
- potential evaporation; spatiotemporal pattern; the northern slope of the Tianshan Mountains; Penman-Monteith model
- 分类号:
- P426.2
- 摘要:
- 利用研究区10个气象站1960—2010年的逐日气象资料，采用FAO Penmarr Monteith模型计算研究区潜在蒸发量，运用气候倾向率和统计学原理分析了研究区潜在蒸发量的时间变化趋势，并在ArcGIS环境下通过Spline插值法分析了潜在蒸发量变化的空间分异，最后运用多元回归分析法对影响潜在蒸发量变化的主导因素进行了探讨，结果表明：近50年研究区年潜在蒸发量总体呈增加趋势，其年际变化倾向率为1.291 mm/10 a；年潜在蒸发量自20世纪60年代逐渐减少，80年代减少到最低，90年代以后逐渐增加，且增加幅度较大；从季节来看，夏季的潜在蒸发量呈减小的趋势，其他季节呈增加的趋势，其中秋季的增加幅度最大（1.635 mm/10 a）；空间分布来看，东、西部地区潜在蒸发量低于中部地区；最低气温和平均风速是影响研究区潜在蒸发量变化的主要因素。
- Abstract:
- Based on the daily data of 10 meteorological stations from 1960 to 2010, potential evapotranspiration was calculated using the Penman-Monteith Method recommended by FAO. The time changing trend of potential evaporation on the northern slope of Tianshan Mountains was analyzed. Using the method of spline under ArcGIS, the spatial distribution of potential evaporation was drawn in order to research regional difference. And the multivariate regression method was used to examine the dominant factor influencing potential evaporation. The results indicated that there was an increasing trend in general because the changing rate of annual potential evaporation varied at 1.291 mm/10 a; Annual potential evaporation declined since the 1960s, reached to the minimum in 1980s, gradually increased in later part of 1990s and the increase was significant; The potential evaporation decreased in summer, however, increased in other seasons especially in autumn (1.635 mm/10 a). The minimum temperature and average wind speed are the main factors affecting the potential evaporation on northern slope of Tianshan Mountains.
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备注/Memo
收稿日期:2014-11-04;改回日期:2014-12-15。
基金项目:国家自然科学基金（41461086，41361025）；校级团队创新项目子课题（2011ZRKXTD-05）
作者简介:刘琳(1981-),女,湖南衡阳人,副教授,硕士,主要从事GIS及其应用研究。E-mail:liulin779@163.com
通讯作者:张正勇(1978-),男,甘肃景泰人,副教授,在读博士,主要从事气候变化与环境资源研究。E-mail:zyz0815@163.com