毛乌素沙地乌审旗不同降水年份ET_(0)变化特征及影响因子分析  

Variation Characteristics and Influencing Factors of Potential Evapotranspiration in Different Precipitation Years in Uxin Banner,Mu Us Sandy Land

作　　者：洪光宇[1] 于志刚 云昕 张玉 高颖 李俊霞 高孝威[1] 李燕南 HONG Guangyu;YU Zhigang;YUN Xin;ZHANG Yu;GAO Ying;LI Junxia;GAO Xiaowei;LI Yannan(Inner Mongolia Academy of Forestry Sciences,Hohhot 010010,China;Bayanerdeng Sand Control Forest Farm,Bairin Right Banner,Inner Mongolia,Chifeng 025150,China;Inner Mongolia Mapping and Geographic Information Center,Hohhot 010000,China;Wujiacun Management Station of Inner Mongolia Daqingshan National Nature Reserve,Inner Mongolia,Hohhot 011700,China;M·Grass Ecological Environment(Group)Co.,Ltd,Hohhot 010070,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]巴林右旗巴彦尔灯治沙林场,内蒙古赤峰025150 [3]内蒙古自治区测绘地理信息中心,内蒙古呼和浩特010000 [4]内蒙古大青山国家级自然保护区五家村管理站,内蒙古呼和浩特011700 [5]蒙草生态环境(集团)股份有限公司,内蒙古呼和浩特010070

出　　处：《内蒙古林业科技》2023年第2期1-5,共5页Journal of Inner Mongolia Forestry Science and Technology

基　　金：中央财政林业和草原科技推广示范项目(内林草科推[2022]09号)。

摘　　要：本文探究毛乌素沙地乌审旗丰水年、平水年及欠水年潜在蒸散量(ET_(0))的变化特征,可为水资源短缺地区植被结构优化、植被合理布局及水资源合理利用提供依据。根据对乌审旗3个气象站连续监测数据的筛选,采用相关性分析法及多元回归法,分析不同降水年份潜在蒸散量变化特征,并探讨各气候因子对毛乌素沙地的影响。结果表明:(1)ET_(0)存在明显的季节性变化,年际内变化呈单峰曲线,在6—8月间达到峰值;(2)湿润度随着月份的增加出现波动性增大现象,波动趋势均与降水量有高度一致性,且二者之间呈极显著正相关关系。(3)平均温度是该区ET_(0)的主要影响因子,贡献率为56.78%;其次是风速,贡献率为15.69%;再次是日照时数和相对湿度。相对湿度对ET_(0)起到了抑制作用,而平均温度、风速和日照时数对ET_(0)有正向推动作用,温度升高与湿度下降导致潜在ET_(0)增大。The characteristics of ET_(0)changes in flat,wet and dry years in Uxin Banner,Mu Us Sandy Land were explored to provide reference for optimizing vegetation structure,rational vegetation layout and rational utilization of water resources in water shortage areas.According to the continuous long-term monitoring data of three meteorological stations in Mu Us Sandy Land,the meteorological data in flat,wet and dry years were screened out.Through correlation analysis and multiple regression method,the characteristics of potential evapotranspiration changes in different precipitation years were analyzed and the images of various climate factors were discussed.The results indicated that:(1)ET_(0)exhibited significant seasonal changes,with a single peak curve between years,reaching its peak between June and August.(2)The wettability showed an increase in volatility with the increase of months,and the fluctuation trend was highly consistent with precipitation,and there was a highly significant positive correlation between them.(3)The average temperature was the main influencing factor of ET_(0)in this area,with a contribution rate of 56.78%,followed by wind speed with a contribution rate of 15.69%,and then sunshine hours and relative humidity.Relative humidity had a inhibitory effect on ET_(0),while temperature,wind speed and sunlight had a positive driving effect on ET_(0).The increase in temperature and decrease in humidity led to an increase in potential ET_(0).

关 键 词：影响因子 潜在蒸散量 湿润度 降水量 毛乌素沙地 

分 类 号：P426.2[天文地球—大气科学及气象学]