Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic parameters in Northeast China
Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic parameters in Northeast China
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集成AVHRR和MODIS数据监测东北地区NDVI变化及其与气候参数的关系
DOI：
10.1016/j.jag.2011.10.007
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发表时间：
2012-08-01
影响因子：
7.5
通讯作者：
Ren, Chunying
中科院分区：
文献类型：
--
作者：
Mao, Dehua;Wang, Zongming;Ren, Chunying
在AVHRR GIMMS NDVI和MODIS NDVI的基础上，采用逐像元一元线性回归模型构建了1982年至2009年覆盖中国东北地区的月NDVI序列。扩展后的NDVI通过了一致性检验，可以很好地用于分析。月度NDVI趋势与气候变化高度相关。 28年来，夏季空间平均NDVI随气温升高而呈下降趋势，降水量显着减少。 NDVI趋势存在空间异质性，与不同季节的区域气候特征相对应。研究期间95个气象站的NDVI与月平均气温和月降水量表现出显着的相关性。在大多数站点和所有植被类型中，NDVI 与温度的相关性强于 NDVI 与降水的相关性。不同的植被类型对气候变化表现出不同的空间响应。 (C) 2011 Elsevier B.V. 保留所有权利。
On the basis of AVHRR GIMMS NDVI and MODIS NDVI, we constructed monthly NDVI sequences covering Northeast China from 1982 to 2009 using a per-pixel unary linear regression model. The expanded NDVI passed the consistency check and were well used for analysis. The monthly NDVI trends were highly correlated with climatic changes. Spatially averaged NDVI in summer exhibited a downward trend with increased temperature and significantly decreased precipitation in the 28 years. NDVI trends were spatially heterogeneous, corresponding with the regional climatic features of different seasons. NDVI for the 95 meteorological stations exhibited significant correlations with monthly mean temperature and monthly precipitation during the study period. The NDVI-temperature correlation was stronger than NDVI-precipitation correlation in most stations and for all vegetation types. Different vegetation types showed various spatial responses to climatic changes. (C) 2011 Elsevier B.V. All rights reserved.