气候变化对阿拉善荒漠植被的影响研究

摘要/Abstract

摘要： 利用1982—2003年NASA GIMMS归一化植被指数(NDVI)数据集和阿拉善左旗、右旗和额济纳旗气温和降水资料,对阿拉善地区NDVI变化和气候变化特征及其相互关系进行了分析。结果表明：①1982—2003年东部地区(左旗植被指数略有增加,而中部(右旗)和西部地区(额济纳旗)则呈下降趋势。季节变化东、中、西部表现不同。左旗和额济纳旗多年平均NDVI的月变化和右旗相反。②东部地区升温率最大,其次是西部和中部地区。降水表现为东部和西部地区(额济纳旗)稍有增加,而中部地区(右旗)呈缓慢减少趋势。季节变化东、中、西部表现不同。多年平均气温和降水量的月变化趋势东、中、西部一致,呈单峰型曲线。③东部地区和中部地区,降水量与植被指数存在明显的年相关、隔季和当季相关,而西部地区额济纳旗没有明显的相关性。阿拉善地区NDVI同温度的相关性不好。

关键词: 荒漠植被, NDVI变化, 气候变化, 阿拉善地区

Abstract:

The variation characteristics of vegetation and their relationship with climate change in Alxa region from 1982 to 2003 were studied by using the GIMMS Normalized Difference Vegetation Index (NDVI) data and meteorological records from Alxa Left Banner, Alxa Right Banner and Ejin Banner in order to find out the regional response of the vegetation to the global change. The results showed that: ①From 1982 to 2003, the annual mean of NDVI weakly increased in the eastern Left Banner but descended in the middle Right Banner and in the western Ejin Banner of Alxa. The season variation of NDVI was different: the monthly variation of 22-year averaged NDVI in Left Banner and Ejin Banner was contrary to that in Right Banner. ②Rate of temperature increase was the biggest in the eastern Left Banner and the smallest in the middle Right Banner from 1982 to 2003. The annual mean precipitation slightly increased in the eastern Left Banner and in the western Ejin Banner but descended slowly in the middle Right Banner. The seasonal variation of temperature and precipitation was also different: the monthly variation of 22-year averaged temperature and precipitation appeared to vary in a single-peak curve in Left Banner, Right Banner and Ejin Banner.③The NDVI showed a positive annual correlation, interseasonal correlation and seasonal correlation with precipitation in the eastern Left Banner and the middle Right Banner, but there was no correlation between NDVI and precipitation in the western Ejin Banner. There was no correlation between NDVI and temperature in Alxa region.

Key words: desert vegetation, NDVI change, climate change, Alxa region

中图分类号:

Q948

张凯;司建华;王润元;王小平;韩海涛;郭铌. 气候变化对阿拉善荒漠植被的影响研究[J]. 中国沙漠, 2008, 28(5): 879-885.

ZHANG Kai;SI Jian-hua;WANG Run-yuan;WANG Xiao-ping;HAN Hai-tao;GUO Ni. Impact of Climate Change on Desert Vegetation in Alxa Region[J]. JOURNAL OF DESERT RESEARCH, 2008, 28(5): 879-885.

参考文献

[1]孙红雨,王常耀,牛铮,等.中国地表植被覆盖变化及其与气候因子关系——基于NOAA时间序列数据分析[J].遥感学报,1998,2(3):204-210.
[2]Tucker C J,Vanpraet C I,Sharman M,et al. Satellite remote sensing of total herbaceous biomass production in the Senegalese Sahel:1980—1984[J].Remote Sens Environ,1985,17:233-249.
[3]Gramer W.Comparing global models of terrestrial net primary productivity (NPP):overview and key results[J].Global Change Biol,1999,5:1-15.
[4]高志海,李增元,魏怀东,等.干旱地区植被指数(VI)的适宜性研究[J].中国沙漠,2006,26(2):243-248.
[5]卢玲,李新,程国栋.利用NOAA AVHRR 植被指数数据集分析黑河流域季候特征[J].中国沙漠,2002,22(2):187-191.
[6]李本纲,陶澍. AVHRR NDVI与气候因子的相关分析[J].生态学报,2000,20(5):898-902.
[7]李晓兵,史培军.中国典型植被类型NDVI动态变化与气温、降水变化的敏感性分析[J].植物生态学报,2000,24(3):379-382.
[8]陈云浩,李晓兵,史培军.1983—1992年中国陆地NDVI变化的气候因子驱动分析[J].植物生态学报,2001,25(6):716-720.
[9]高志强,刘纪远.基于遥感和GIS的中国植被指数变化的驱动因子分析及模型研究[J].气候与环境研究,2000,5(2):155-164.
[10]龚家栋.阿拉善地区生态环境综合治理意见[J].中国沙漠,2005,25(1):98-115.
[11]叶笃正.中国全球变化预测研究[M].北京:气象出版社,1992:40-42.
[12]傅华,陈亚明,周志宇,等.阿拉善荒漠草地恢复初期植被与土壤环境的变化[J].中国沙漠,2003,23(6):661-664.
[13]杜方红,黄文浩.阿拉善地区生态环境问题及探讨[J].内蒙古环境保护,2005,17(3):5-9.
[14]Holben B N.Characteristics of maximum-value composite images for temporal AVHRR data[J].Int J Remote Sens,1987,7:1435-1445.
[15]邓朝平,郭铌,王介民,等.近20余年来西北地区植被变化特征分析[J].冰川冻土,2006,28(5):686-693.
[16]郭铌,梁芸,王小平.黑河调水对下游生态环境恢复效果的卫星遥感监测分析[J].中国沙漠,2004,24(6):740-744.