NDVI-based increase in growth of temperate grasslands and its responses to climate changes in China

被引：589

作者：

Piao, Shilong

Mohammat, Anwar

Fang, Jingyun ^{[1
]}

Cai, Qiang

Feng, Jianmeng

机构：

[1] Peking Univ, Ctr Ecol Res & Educ, Coll Environm Sci, Dept Ecol, Beijing 100871, Peoples R China

[2] Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China

[3] Univ Iowa, Dept Geog, Iowa City, IA 52245 USA

来源：

GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS | 2006年 / 16卷 / 04期

基金：

中国国家自然科学基金;

关键词：

China; climate change; Normalized Difference Vegetation Index (NDVI); interannual change in NDVI; spatial pattern of NDVI; temperate grassland;

D O I：

10.1016/j.gloenvcha.2006.02.002

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study analyzes the temporal change of Normalized Difference Vegetation Index (NDVI) for temperate grasslands in China and its correlation with climatic variables over the period of 1982-1999. Average NDVI of the study area increased at rates of 0.5% yr(-1) for the growing season (April-October), 0.61% yr(-1) for spring (April and May), 0.49% yr(-1) for summer (June-August), and 0.6% yr(-1) for autumn (September and October) over the study period. The humped-shape pattern between coefficient of correlation (R) of the growing season NDVI to precipitation and growing season precipitation documents various responses of grassland growth to changing precipitation, while the decreased R values of NDVI to temperature with increase of temperature implies that increased temperature declines sensitivity of plant growth to changing temperature. The results also suggest that the NDVI trends induced by climate changes varied between different vegetation types and seasons. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：340 / 348

页数：9

共 46 条

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