摘要
基于Google Earth Engine(GEE)云计算平台,利用像元二分模型法计算得到了吴忠市2000—2020年年均植被覆盖度(FVC),同时获取了各年年均气温、年降水量数据,通过分析揭示了该市近21年植被覆盖度的时空变化特征,并进行了气候驱动力分析。结果表明,在时间上,近21年吴忠市植被覆盖度变化整体上呈稳中向好趋势,且该市已由低植被覆盖度地区转变为中植被覆盖度地区,各县级地区与全市整体变化情况基本相同。在空间上,全市植被覆盖度主要呈现南部增大而北部减小或不变的趋势;全市植被在全局呈集聚趋势。植被覆盖度与年降水量呈线性正相关,而气温对植被覆盖度影响不大。
Based on Google Earth Engine(GEE)cloud computing platform,the annual average vegetation coverage(FVC)of Wuzhong City from 2000 to 2020 was calculated by pixel dichotomy model method,and the annual average temperature and annual precipitation data of each year were obtained.Through analysis,the spatio-temporal change characteristics of vegetation coverage in the city in recent 21 years were revealed,and the climate driving force was analyzed.The results showed that from the perspective of time,the change of vegetation coverage in Wuzhong City had generally shown a stable and positive trend in the past 21 years,and the city had changed from low vegetation coverage to medium vegetation coverage area.The changes in the county and the city were basically the same.Spatially,the vegetation coverage in the whole city mainly showed a trend of increasing in the south and decreasing or unchanged in the north;the global vegetation in the whole city showed a trend of agglomeration.There was a linear positive correlation between vegetation coverage and annual precipitation,while temperature had little effect on vegetation coverage.
作者
王军川
林中雪
马娟利
李治苇
徐来超
刘源
张萍
曹兵
WANG Jun-chuan;LIN Zhong-xue;MA Juan-li(College of Agriculture,Ningxia University,Yinchuan,Ningxia 750021;College of Life Science,Ningxia University,Yinchuan,Ningxia 750021)
出处
《安徽农业科学》
CAS
2023年第2期90-92,98,共4页
Journal of Anhui Agricultural Sciences
基金
宁夏回族自治区重点研发计划项目(2019BFG02024)。
关键词
植被覆盖度
时空变化
空间自相关
气候驱动力
吴忠市
Vegetation coverage
Temporal and spatial changes
Spatial autocorrelation
Climate driver
Wuzhong City
