干旱区生态环境知识资源中心(Arid): 19822012年全球干旱区植被变化及驱动因子分析

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	19822012年全球干旱区植被变化及驱动因子分析
其他题名	Vegetation Change and Its Driving Factors in Global Drylands during the Period of 1982 -2012
	郑艺 1; 张丽 2; 周宇 1; 张炳华 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2017
卷号	34 期号:1 页码:59-66
中文摘要	基于长时间序列卫星遥感数据GIMMS3g NDVI(19822012年), 分析了全球干旱区(包括亚湿润干旱区、半干旱区、干旱区和极端干旱区)植被时空变化及其对气候和人文等非气候因子的响应。结果表明: ①全球干旱区NDVI总体呈显著增长趋势(P < 0.001), 增长速率为0.000 5·a~(-1), 略低于全球植被增长速率。显著上升区域和显著下降区域分别占全球植被显著变化区域面积的27.0%和7.7%(P < 0.05) 。显著退化面积最大区域为半干旱区。②降水作为干旱区植被变化的主要影响因子,主要表现在对干旱区和半干旱区植被的影响上,对亚湿润干旱区和极端干旱区影响较小。③全球不同干旱区植被变化及驱动因子存在较大差异。如澳大利亚南部主要受到季节降水的影响,植被改善;而南美和欧亚大陆中部则主要受到人为因素的影响,植被退化。
英文摘要	Global drylands are characterized by the scarcity of precipitation and the fragile ecological environment. They play the important roles in global climate change and ecosystem regulation. It could contribute to protecting the environment and improving the living standards of local people to detecte the vegetation variation and its driving factors in global drylands including the dry subhumid, semi-arid,arid and hyper-arid areas. In this study, the long-term satellite data of GIMMS3g NDVI during the period of 1982 - 2012 and the precipitation and temperature data were used to illustrate the spatiotemperal variation of vegetation and its response to climate change and non-climate factors in drylands. The results are as follows: ① NDVI of vegetation in global drylands increased significantly (P < 0.001) with a rate of 0.000 5·a~(-1),which was slightly lower than that of global vegetation. The area proportions of global drylands with the significant NDVI increase and decrease to global vegetated areas with significant NDVI trends were 27.0% and 7.7% respectively. The largest areas of dryland regions with the significant vegetation degeneration occurred in semi-arid areas; ② Precipitation was the dominant factor affecting the change of vegetation in global drylands,expecially in arid and semi-arid areas,and its influence was slighter in dry subhumid and hyper-arid areas; ③ Because of the different climatic and geographic conditions and human factors, the change of vegetation in drylands was different from different regions. For example, the vegetation was improved in south Australia because of the effect of seasonal precipitation,but it was in a degeneration trend in South America and Eurasia due to human activities.
中文关键词	植被变化 ; 驱动因子 ; 气候变化 ; 人文因素 ; 干旱区
英文关键词	GIMMS3g NDVI vegetation change driving factor GIMMS3g NDVI climate change human activity drylands
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5897491
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235974
作者单位	1.中国科学院遥感与数字地球研究所, 中国科学院数字地球重点实验室, 北京 100094, 中国; 2.中国科学院遥感与数字地球研究所, 中国科学院数字地球重点实验室;;海南省地球观测重点实验室, 北京 100094, 中国
推荐引用方式 GB/T 7714	郑艺,张丽,周宇,等. 19822012年全球干旱区植被变化及驱动因子分析[J],2017,34(1):59-66.
APA	郑艺,张丽,周宇,&张炳华.(2017).19822012年全球干旱区植被变化及驱动因子分析.干旱区研究,34(1),59-66.
MLA	郑艺,et al."19822012年全球干旱区植被变化及驱动因子分析".干旱区研究 34.1(2017):59-66.