干旱区生态环境知识资源中心(Arid): 近20多年来西北绿洲植被指数的变化及其成因

Arid

	近20多年来西北绿洲植被指数的变化及其成因
其他题名	Analyses on the Vegetation Index Variation and Its Formation Causes in the Oases in Northwest China in Recent 22 Years
	郭铌; 王小平; 蔡迪花; 倾继祖
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:1 页码:75-82
中文摘要	利用NASA GIMMS 1982-2003年逐月的标准化植被指数NDVI数据集以及相关的气候资料,选黄河、河西内陆河以及新疆内陆河的典型绿洲为代表,分析了22年间各绿洲春、夏、秋季NDVI的变化和绿洲面积变化,比较了不同年代间NDVI的年变化特征,并研究了绿洲NDVI与气候和人类活动的关系.结果表明:①近22年来,各绿洲夏季和秋季NDVI均呈显著增加趋势,以夏季NDVI增加幅度最大.从地域上看,新疆塔里木盆地南侧绿洲和’河西走廊绿洲各季NDVI增加较其他绿洲明显.②不同年代间各绿洲NDVl年变化较大,主要表现为年代问植被生长季NDVI的增加和NDVI峰值出现时间的改变.③近22年来,西北绿洲面积均呈现增加趋势,以河西走廊和新疆内陆河绿洲面积增加最为显著,黄河绿洲面积扩大趋势不太显著.④绿洲NDVI增加的主要原因为绿洲面积的扩大、种植结构的调整,气温的升高和降水量的增加,对绿洲NDVI增加有正效益,但降水量的变化对不同绿洲NDVI的驱动作用随着降水量在地域上的减少而变弱.
英文摘要	This paper analyzes the variation of Normalized Difference Vegetation Index (NDVI) in spring, sum-mer and autumn and the area change of some typical oases in the Yellow River Basin, the Hexi Corridor and Xin-jiang Uygur Autonomous Region in recent 22 years using the monthly datasets of NDVI during the period of 1982 -2003, compares the annual change characteristics of NDVI in 3 decades, and researches the relations between the NDVI, climate and human activities in the oases. The results are as follows : (1) The NDVIs of all the oases were increased significantly in autumn, especially in summer in recent 22 years. Regionally, the increasing rate of NDVI was the highest in the Shihezi Oasis (0.0075/a), and that of the oases in the Hexi Corridor and the southern mar-ginal zone of the Tarim Basin were higher than that of others oases ; (2) The variations of NDVI of all the oases in different decades were obvious, especially in the increase of NDVI in plant growth season and the change of occur-ring time of the peak value of NDVI; (3) The areas of the oases in northwest China were all enlarged in recent 22 years, especially in the Hexi Corridor and Xinjiang; (4) The NDVI increase was mainly caused by the enlargement of oases and the regulation of farming structure, and both temperature increase and precipitation increase had posi-tive effects on the NDVI increase.
中文关键词	绿洲面积 ; 气温 ; 降水量 ; 西北地区
英文关键词	NDVI GIMMS the area of oasis NDVI GIMMS temperature precipitation northwest China
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:3858784
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225048
作者单位	中国气象局兰州干旱气象研究所, 甘肃省干旱气候与减灾重点实验室,中国气象局干旱气候与减灾重点实验室, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	郭铌,王小平,蔡迪花,等. 近20多年来西北绿洲植被指数的变化及其成因[J]. 中国气象局兰州干旱气象研究所,2010,27(1):75-82.
APA	郭铌,王小平,蔡迪花,&倾继祖.(2010).近20多年来西北绿洲植被指数的变化及其成因.干旱区研究,27(1),75-82.
MLA	郭铌,et al."近20多年来西北绿洲植被指数的变化及其成因".干旱区研究 27.1(2010):75-82.