20世纪80年代以来西南喀斯特地区植被变化对气候变化的响应

doi:10.11821/yj2007050001

地理研究 ›› 2007, Vol. 26 ›› Issue (5): 857-866.doi: 10.11821/yj2007050001

• 气候与全球变化 • 下一篇

20世纪80年代以来西南喀斯特地区植被变化对气候变化的响应

蒙吉军, 王钧

北京大学城市与环境学院,地表过程分析与模拟教育部重点实验室,北京 100871

收稿日期:2007-01-24 修回日期:2007-05-15 出版日期:2007-09-25 发布日期:2007-09-25
作者简介:蒙吉军(1971-),男,甘肃张掖人,博士,副教授。主要研究方向为综合自然地理学和土地变化科学。 E-mail :jijunm@pku.edu.cn
基金资助:
国家自然科学基金重点项目资助(40335046);国家科技支撑计划课题(2006BAD20B07)

The response of vegetation dynamics to climate change in the southwestern karst region of China since the early 1980s

MENG Ji-jun, WANG Jun

College of Urban and Environmental Sciences, Department of Geography, Peking University|Key Laboratory of Analysis and Simulation of Earth Surface Processes, Ministry of Education, Beijing 100871, China

Received:2007-01-24 Revised:2007-05-15 Online:2007-09-25 Published:2007-09-25
Supported by:
国家自然科学基金重点项目资助(40335046);国家科技支撑计划课题(2006BAD20B07)

摘要/Abstract

摘要： 气候变化与植被变化的关系已经在全球和区域尺度上得到了研究证明。在前人研究的基础上,基于AVHRR GIMMS NDVI和AVHRR GloPEM NPP数据集,通过对逐个像元信息的提取和分析,研究了20世纪80年代以来,我国西南喀斯特地区植被变化对气候变化的响应。研究结果显示:(1)20世纪80年代以来,西南喀斯特地区植被覆盖度和净初级生产量总体均呈增加的趋势,但不显著。植被指数的年际变化存在着明显的区域差异;(2)植被指数年际变化与气候因子年际变化的相关系数区域分异比较明显;(3)不同的植被类型对气候变化有着不同的响应特征;在该研究区气温变化对植被变化的影响要高于降水量变化对其影响;(4)植被指数年际变化与气候因子年际变化的相关系数在不同气候条件下分布的规律性比较明显。本研究将会增进对影响喀斯特生态系统稳定性的自然过程的认识,同时也会为喀斯特生态系统的管理提供科学依据。

关键词: 气候变化, 植被变化, NDVI, NPP, 西南喀斯特地区

Abstract: The relationship between climate change and vegetation dynamics has been identified by recent studies in global and regional scales. Based on previous researches and AVHRR GIMMS NDVI and AVHRR GloPEM NPP data sets, this paper analyzes the response of vegetation dynamics to climate change in the southwestern karst region of China since the early 1980s by extracting each pixel's information. The results show that: (1) since the early 1980s, both vegetation cover density and net primary production have the ascending tendencies. However, interannual variation rates of vegetation indexes have apparent spatial differentiations; (2) correlation coefficients between the interannual variations of vegetation indexes and the interannual variations of climate factors also have apparent spatial differentiations; (3) various vegetation types have different responses to climate change, and the annual mean temperature variations have more significant impact on vegetation dynamics than the annual precipitation variations;and (4) the distribution laws of correlation coefficients between the interannual variations of vegetation indexes and the interannual variations of climate factors under different climate conditions are apparent. The study of the response of vegetation dynamics to climate change in the southwestern karst region of China will enrich our knowledge of the natural courses which impact the stability of karst ecosystems and provide scientific basis for the management of karst ecosystems.

Key words: climate change, vegetation dynamics, NDVI, NPP, southwestern karst region of China

蒙吉军, 王钧. 20世纪80年代以来西南喀斯特地区植被变化对气候变化的响应[J]. 地理研究, 2007, 26(5): 857-866.

MENG Ji-jun, WANG Jun. The response of vegetation dynamics to climate change in the southwestern karst region of China since the early 1980s[J]. GEOGRAPHICAL RESEARCH, 2007, 26(5): 857-866.

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20世纪80年代以来西南喀斯特地区植被变化对气候变化的响应

The response of vegetation dynamics to climate change in the southwestern karst region of China since the early 1980s

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