2001-2010 年内蒙古植被覆盖度时空变化特征

doi:10.11821/xb201209010

地理学报 ›› 2012, Vol. 67 ›› Issue (9): 1255-1268.doi: 10.11821/xb201209010

2001-2010 年内蒙古植被覆盖度时空变化特征

穆少杰¹, 李建龙¹, 陈奕兆¹, 刚成诚¹, 周伟¹, 居为民²

1. 南京大学生命科学学院, 南京210093;
2. 南京大学国际地球系统科学研究所, 南京210093

收稿日期:2012-05-04 修回日期:2012-05-29 出版日期:2012-09-20 发布日期:2012-09-20
通讯作者: 李建龙(1962-),教授。E-mail:jianlongli@gmail.com
作者简介:穆少杰(1985-),男,内蒙古乌兰察布人,在读博士,主要从事遥感技术应用及陆地碳循环方面的研究。E-mail:musjeg@gmail.com
基金资助:
国家重点基础研究发展计划(973 计划) 项目(2010CB950702); 国家863 计划专题项目(2007AA10Z231);APN 全球变化基金项目(ARCP2011-06CMY-Li)

Spatial Differences of Variations of Vegetation Coverage in Inner Mongolia during 2001-2010

MU Shaojie¹, LI Jianlong¹, CHEN Yizhao¹, GANG Chengcheng¹, ZHOU Wei¹, JU Weimin²

1. School of Life Science, Nanjing University, Nanjing 210093, China;
2. International Institute for Earth System Science, Nanjing University, Nanjing 210093, China

Received:2012-05-04 Revised:2012-05-29 Online:2012-09-20 Published:2012-09-20
Supported by:
National Basic Research Program of China, No.2010CB950702; National High Technology Research and Development Program of China (863 Program), No.2007AA10Z231; APN project, No.ARCP2011-06CMY-Li

摘要/Abstract

摘要： 基于MODIS-NDVI 遥感数据反演了内蒙古地区2001-2010 年植被覆盖度的空间格局和变化规律, 并结合该地区同期降雨量和温度数据, 分别从不同空间和时间尺度上分析了森林生态区、草原生态区和荒漠生态区植被的年际变化和月际变化对气候变化的响应。结果表明:(1) 内蒙古植被覆盖度在空间上呈现东高西低的分布特征, 自西向东的变化速率为0.2/10°N, 10 年间森林、草原和荒漠生态区的年均植被覆盖度分别为0.57、0.4 和0.16;(2) 2001-2010年, 内蒙古植被覆盖度总体上呈上升趋势, 研究区内植被覆盖度极显著增加和显著增加的面积分别占总面积的11.25%和29.13%, 二者之和大于植被覆盖度极显著减少和显著减少的面积比例之和, 后者分别为7.65%和26.61%;(3) 在年际水平上, 内蒙古植被生长总体上与降雨量的关系更加密切, 而在月际水平上, 降雨量和温度对植被生长的影响作用相当, 说明年内植被生长更依赖于水热组合的共同作用, 而与单一气候因子的相关性降低;(4) 森林生态区植被覆盖度在年/月际水平上均与温度的相关性较强, 荒漠生态区植被覆盖度在年/月际水平上均与降雨量相关性较强, 而草原生态区植被覆盖度在年际水平上主要受降雨影响, 在月际水平上与二者相关性相当;(5) 草原区月植被覆盖度对降雨量的响应存在时滞效应。

关键词: 内蒙古, 植被覆盖度, 降雨量, 温度, 相关性

Abstract: Global climate change has led to significant vegetation changes in the past half century. Inner Mongolia, most of which was located in arid and semi-arid areas, is undergoing a process of prominent warming and drying. It is necessary to investigate the response of vegetation to the climatic variations (temperature and precipitation) for a better understanding of the accumulated consequence of climate change. Vegetation coverage, which is an important indicator for evaluating terrestrial environment, is used to monitor vegetation change. MODIS-NDVI data and climate data were used to analyze the vegetation dynamics and its relationship with climate change on different spatial (forest, grassland and desert biome) and temporal (yearly and monthly) scales in Inner Mongolia during 2001-2010. It was found that vegetation coverage increased from west to east across Inner Mongolia with a change rate of 0.2/10°N. During 2001-2010, the mean vegetation coverage was 0.57, 0.4 and 0.16 in forest, grassland and desert biome, respectively, exhibiting evident spatial heterogeneities. There is a slight increase of vegetation coverage over the study period. Across Inner Mongolia, the vegetation coverages with extremely significant and significant increase accounted for 11.25% and 29.13% of the total study area, respectively, while those with extremely significant and significant decrease were 7.65% and 26.61%, respectively. The correlation analysis between vegetation coverage and climate shows that annual vegetation coverage was better correlated with precipitation, while the change of monthly vegetation coverage is consistent with both the changes of temperature and precipitation, indicating that the vegetation growth within a year is more sensitive to the joint function of hydrothermal combination rather than either climate factor. The vegetation coverage of forest biome was mainly affected by temperature on both yearly and monthly scales, while that of desert biome was mainly influenced by precipitation on the two temporal scales.

Key words: Inner Mongolia, vegetation coverage, precipitation, temperature, correlation

穆少杰, 李建龙, 陈奕兆, 刚成诚, 周伟, 居为民. 2001-2010 年内蒙古植被覆盖度时空变化特征[J]. 地理学报, 2012, 67(9): 1255-1268.

MU Shaojie, LI Jianlong, CHEN Yizhao, GANG Chengcheng, ZHOU Wei, JU Weimin. Spatial Differences of Variations of Vegetation Coverage in Inner Mongolia during 2001-2010[J]. Acta Geographica Sinica, 2012, 67(9): 1255-1268.

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2001-2010 年内蒙古植被覆盖度时空变化特征

Spatial Differences of Variations of Vegetation Coverage in Inner Mongolia during 2001-2010

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