干旱区生态环境知识资源中心(Arid): 基于GIMMS NDVI数据的北方13省荒漠化趋势评价

Arid

	基于GIMMS NDVI数据的北方13省荒漠化趋势评价
其他题名	Assessment of desertification trends of 13 provinces in Northern China based on GIMMS NDVI data
	安佑志 1; 张远 1; 高炜 1; 尹占娥 2; 殷杰 3
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2014
卷号	28 期号:4 页码:1-7
中文摘要	北方13省处在干旱、半干旱和半湿润地区,植被对气候变化和人类活动最为敏感,一直是荒漠化研究的热点地区。基于GIMMS NDVI和降水数据,使用一元线性回归方法对北方13省1982年-2006年SigmaNDVI和降水的年际变化趋势及其相关性进行了分析,并对SigmaNDVI和降水的变化趋势差异做进一步分析。研究结果表明:从总体上来看,中国北方13省在25年间荒漠化趋势变缓,即植被覆盖度呈显著上升趋势,其中显著增加的像元数为35.3%,而显著降低的像元数仅占7.2%。从SigmaNDVI与降水的斜率散点象限图来看,SigmaNDVI和降水的差异主要在第二象限和第三象限,说明尽管降水在北方地区植被覆盖度变化中起到主要作用,但是降水并不能完全解释植被覆盖度的变化趋势,人类活动如植树造林等是植被覆盖度增加的重要驱动力。内蒙古自治区东北部和东北地区的三江平原呈现出荒漠化趋势,在大部分地区与降水的相关性不显著,表明在该地区降水的影响作用较弱,主要是人类活动等因素导致的。
英文摘要	As one of the most sensitive region to climate change and human activities in arid,semi-arid and sub-humid areas,13 provinces in northern China have been recognized as a hot spot on desertification study.A linear regression method was performed to analyze the annual variations trends of GIMMS NDVI and precipitation data.And also,the correlation and anomaly of SigmaNDVI and precipitation in northern province for the period of 1982-2006 were further investigated.The results showed that overall,the trend of desertification slowed down for the 13 provinces in northern China during the 25 years.The vegetation coverage was significantly down increasing, in which the number of pixels with significant increase were upto 35.3%,and the decreased one accounted for only 7.2%.SigmaNDVI and precipitation anomaly were mainly in the second and third quadrant.This indicates that despite the precipitation played a major role in vegetation changes in the northern region, it did not fully explain the increasing trend of vegetation.In addition to precipitation,vegetation increase was also influenced by anthropogenic factors,such as afforestation activity,which was an important driving force.The northeastern part of Inner Mongolia and Sanjiang Plain of Northeast China showing the trend of desertification,no significant correlation in most parts of the precipitation,indicating that the effect of precipitation in the region was weak,mainly aused by human activities and other factors.
中文关键词	中国北方 ; 荒漠化趋势
英文关键词	GIMMS NDVI GIMMS NDVI the northern China desertification
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5114109
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231215
作者单位	1.华东师范大学中国科学院对地观测与数字地球科学中心环境遥感与数据同化联合实验室, 地理信息科学教育部重点实验室, 上海 200241, 中国; 2.上海师范大学地理系, 上海 200234, 中国; 3.浙江工商大学旅游与城市管理学院, 杭州, 浙江 310018, 中国
推荐引用方式 GB/T 7714	安佑志,张远,高炜,等. 基于GIMMS NDVI数据的北方13省荒漠化趋势评价[J],2014,28(4):1-7.
APA	安佑志,张远,高炜,尹占娥,&殷杰.(2014).基于GIMMS NDVI数据的北方13省荒漠化趋势评价.干旱区资源与环境,28(4),1-7.
MLA	安佑志,et al."基于GIMMS NDVI数据的北方13省荒漠化趋势评价".干旱区资源与环境 28.4(2014):1-7.