摘要
针对不同区域植被覆盖度时空变化及其降水、气温对其变化的响应差异问题,该文以2011年为特征年,基于中分辨率光谱成像仪数据,采用线性回归分析法、变异系数,从空间和时间尺度对可可西里盐湖流域植被覆盖度变化进行研究,同时利用相关系数,分析植被变化与降水量、温度的时空变化关系。结果表明:①近16年可可西里盐湖流域植被呈现由西向东逐渐递减的趋势,2011年之后植被覆盖度虽保持相对稳定,但整体变化趋势发生改变;②近16年可可西里盐湖流域平均植被覆盖度总体呈弹性增长趋势,大部分区域的植被覆盖度变异程度为相对较低波动变化;③近16年可可西里盐湖流域内的年降水量、年降水量与年平均植被植被覆盖度显著相关,且年平均气温的相关性比年降水量高。
Aiming at problems of the spatial-temporal variation of vegetation coverage in different regions and the response of precipitation and temperature to these variations,the paper took 2011 as the characteristic year,used linear regression analysis and coefficient of variation method to study the change of vegetation coverage in Hoh Xil Salt Lake Basin from the spatial and temporal scales based on moderate-resolution imaging spectroradiometer data,and then applyed the correlation coefficient to analyze Spatial and temporal relationship of vegetation change between precipitation and temperature.The results showed that:①the vegetation in the Hoh Xili Salt Lake Basin had gradually decreased from west to East in the past 16 years,the vegetation coverage had remained relatively stable since 2011,but the overall change trend had changed;②the average vegetation coverage in the Hoh Xili Salt Lake Basin had shown an elastic growth trend in the past 16 years and the variation degree of vegetation coverage in most areas was relatively low;③the annual precipitation and annual precipitation in the Hoh Xili Salt Lake Basin were significantly related to the annual average vegetation coverage in the past 16 years and the correlation of the annual average temperature was higher than the annual precipitation.
作者
刘慧
乔占明
赖锋
LIU Hui;QIAO Zhanming;LAI Feng(Qinghai Provincial Natural Resources Survey and Monitoring Institute,Xining 810000,China;Geomatics Technology and Application Key Laboratory of Qinghai Province,Xining 810000,China;Academy of Animal Science and Veterinary Medicine Qinghai University/Qinghai Academy of Animal Science and Veterinary Medicine,Xining 810016,China)
出处
《测绘科学》
CSCD
北大核心
2022年第8期79-85,共7页
Science of Surveying and Mapping
基金
青海省科学技术厅项目(2018-ZJ-780)
关键词
植被覆盖度
线性回归分析
变异系数
相关系数
vegetation coverage
linear regression analysis
coefficient of variation
correlation coefficient
作者简介
刘慧(1985—),女,四川富顺人,高级工程师,硕士,主要研究方向为自然资源调查监测等。E-mail:liuhui260@163.com;通信作者:乔占明,E-mail:346627407@qq.com
