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地球科学进展  2007, Vol. 22 Issue (1): 33-40    DOI: 10.11867/j.issn.1001-8166.2007.01.0033
研究论文     
近21年青藏高原植被覆盖变化规律
梁四海1,陈 江2,金晓媚1,万 力1,龚 斌3
1. 中国地质大学水资源与环境学院,北京 100083;2. 中国地质科学院水文地质环境地质研究所,河北 石家庄 050061;3. 中国环境科学研究院,北京 100012
Regularity of Vegetation Coverage Changes in the Tibetan Plateau  over the Last 21 Years
LIANG Si-hai1, CHEN Jiang2, JIN Xiao-mei1, WAN Li1, GONG Bin3
1.School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;2.The Institute of Hydrogeology and Environmental Geology, Shijiazhuang 050061,China;3.Chinese Research Academy of Environmental Science, Beijing 100012, China
 全文: PDF(456 KB)  
摘要:

利用GIMMSNDVI遥感数据和GIS技术,结合多种统计、计算方法,定量分析了1982—2002年青藏高原植被覆盖随时间和空间的变化规律,评定了植被变化的自然和人类的影响。结果表明,21年来,青藏高原植被覆盖呈总体增加的变化趋势,平均增长率为3 961.9 km2/年,仅局部出现退化现象,人类对高原植被覆盖未造成破坏性影响。1982—1991年,高原植被呈现良好增加趋势,增加幅度从东部南部向西部北部逐渐减弱,表明由东南向西北逐步减弱的有利气候条件具有经向和纬向的变化规律。1992—2002年,高原中部和西北地区植被呈现退化趋势,强烈退化的地区集中在长江、黄河、澜沧江和怒江的源头地区,显示了高原中部和西北地区的气候条件向不利于植被生长方向转变,高原中部和西北地区植被是响应气候变化的最敏感区。高原植被变化具有7年、3.5年两个显著周期,均为温度所致,表现对温度的变化敏感性。21年期间,高原的8种主要植被类型中有7种类型表现为波动上升的趋势,且寒区旱区植被表现出脆弱性和难恢复性。

关键词: 青藏高原植被覆盖遥感GIMMS    
Abstract:

Analysis of the vegetation coverage changing with the time in the last 21 years is the purpose of this paper to study the regularity of the regional eco-environment in the Tibetan plateau. Based on the remote sensing data GIMMS NDVI, statistical processing and analysis, also calculation, the paper gives quantitative analyses and evaluations of the variability of vegetated rate of the Tibetan plateau. In the last 21 years, the regional vegetation coverage has been on the slow increase at the rate of 3 961.9 km2/a as a whole, except for some place degradation, and also the human have not done damage to the eco-environment. From 1982 to 1991, the vegetation coverage of the whole region increased, except for degrading region at the middle and the west of the area. The value increased is decreasing from the south and the east to the north and the west. The induction, the climate benefiting the vegetation growing, changing with degree of longitude and latitude, can be worked out. It's the main period from 1992 to 2002 that the vegetation degrade, those deteriorated regions are located in the resource regions of the Yangtze river, the Yellow river, the Lancangjiang river and the Nujiang river, which indicates the changing climate would be adverse to the vegetation. The NDVI also has two significant periods of 7 years and 3.5 years, caused by the same significant periods of the temperature, and that indicates that the plateau plant is more senstive to the temperature than to the precipitation. Over 21 years, there are 7 from 8 types vegetation coverage which are raising unstably including clod-arid-region plant with vulnerability and difficult recovery.

Key words: Remote sensing    GIMMS.    The Tibetan plateau    Vegetation coverage
收稿日期: 2006-05-22 出版日期: 2007-01-10
:  Q948.2  
基金资助:

国家自然科学基金西部环境和生态项目“黄河源区区域地下水位下降机制及其环境效应”(编号:90302003);国土资源部黄河源区调查项目“黄河源区1∶25万生态环境地质调查”(编号:1999123004121);长江源区调查项目“长江源区1∶25万生态环境地质调查”(编号:20050127)共同资助.

通讯作者: 梁四海(1970-),男,江苏徐州人,讲师,博士生,主要从事水文与生态环境教学与研究.E-mail: liangsh@cugb.edu.cn     E-mail: liangsh@cugb.edu.cn
作者简介: 梁四海(1970-),男,江苏徐州人,讲师,博士生,主要从事水文与生态环境教学与研究.E-mail: liangsh@cugb.edu.cn
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引用本文:

梁四海,陈江,金晓媚,万力,龚斌. 近21年青藏高原植被覆盖变化规律[J]. 地球科学进展, 2007, 22(1): 33-40.

LIANG Si-hai, CHEN Jiang, JIN Xiao-mei, WAN Li, GONG Bin. Regularity of Vegetation Coverage Changes in the Tibetan Plateau  over the Last 21 Years. Advances in Earth Science, 2007, 22(1): 33-40.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2007.01.0033        http://www.adearth.ac.cn/CN/Y2007/V22/I1/33

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