摘要
以河南省郑州市为研究区,通过搜集2009—2018年河南省的气象数据,基于GEE平台获取月尺度、年尺度NDVI时间序列数据,并进行Slope趋势分析,探讨郑州市植被年际尺度上时空格局的演变规律。基于郑州国家站月尺度的气象数据,进行相关性分析与小波分析,试图分析出郑州国家观测站2009—2018年逐月降水量连续时间序列的周期变化情况,并以此来体现郑州市的植被覆盖在时空演变下对降水的响应情况。结果表明:郑州市植被覆盖度在2009—2018年整体为微微增长的趋势,但在郑州界内呈现明显的空间差异,东部与南部NDVI衰退趋势明显。郑州市降水量呈增长趋势,但增长趋势不明显,同时具有明显的丰水期与枯水期交替的特点,并在2012年前后发生突变,降至10年内最低值。
Taking Zhengzhou city, Henan Province as the study area, this paper collected meteorological data of Henan province from 2009 to 2018, obtained monthly scale and annual scale NDVI time series data based on GEE platform, and conducted Slope trend analysis to discuss the evolution law of vegetation spatial and temporal pattern on the interannual scale in Zhengzhou city. Based on the monthly meteorological data of Zhengzhou National Station, correlation analysis and wavelet analysis were carried out to analyze the periodic change of continuous time series of monthly precipitation in Zhengzhou National Station from 2009 to 2018, and to reflect the response of vegetation coverage to precipitation under the spatio-temporal evolution of Zhengzhou City. The results showed that the vegetation coverage in Zhengzhou increased slightly from 2009 to 2018, but there was an obvious spatial difference within Zhengzhou. The NDVI declined significantly in the east and south. The precipitation in Zhengzhou showed an increasing trend, but the increasing trend was not obvious. At the same time, there was an obvious alternating between wet and dry periods, and the precipitation suddenly changed around 2012 and fell to the lowest value in ten years.
作者
张成玉
牛宇
王梦晨
苏圣鑫
林晓凤
ZHANG Chengyu;NIU Yu;WANG Mengchen;SU Shengxin;LIN Xiaofeng(School of Harbor and Coastal Engineering,Jimei University,Xiamen 361021,China;School of Electromechanical Engineering,Wenzhou University,Wenzhou 325035,China)
出处
《河南科技》
2022年第12期110-115,共6页
Henan Science and Technology
基金
福建省教育厅中青年教师教育科研项目(B20271)。
关键词
归一化植被指数
谷歌地球引擎
Slope趋势分析法
小波分析
Normalized Difference Vegetation Index
Google Earth Engine
Slope trend analysis method
wavelet analysis
