干旱区生态环境知识资源中心(Arid): 20002012年中国北方草地NDVI和气候因子时空变化

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	20002012年中国北方草地NDVI和气候因子时空变化
其他题名	Spatio-temporal Changes of NDVI and Climatic Factors of Grassland in Northern China from 2000 to 2012
	张仁平 1; 冯琦胜 1; 郭靖 2; 尚振艳 1; 梁天刚 1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:5 页码:1403-1412
中文摘要	利用20002012年的MODIS NDVI数据,结合中国北方187个气象基准站年均温度和年降水量资料,对20002012年中国北方草地NDVI的时空变化特征和同期年均温度、降水量动态变化进行了分析。结果表明:(1)草地NDVI无明显变化的区域占北方草地总面积的64.35%,以荒漠草地为主;草地退化区域的面积(占北方草地总面积的23.97%)大于改善区域的面积(占北方草地11.68%)。(2)NDVI变异系数分析结果表明,20002012年以来中国北方草地68.37%区域呈稳定状态。其中,荒漠草地植被变异性较小,处于相对稳定状态的草地占其总面积的79.73%;而灌丛草地和典型草地的变异性较大,变化显著的草地分别占其草地面积的41.55%和45.92%。(3)北方草地区中,54.04%的区域年均温度呈升高趋势,大于温度呈降低趋势的区域,温度升高幅度最大为0.159 ℃·a~(-1);年降水量呈增加趋势的面积达71.01%,远大于呈减少趋势的面积,降水量增加的最大幅度为23.29 mm·a~(-1)。
英文摘要	Based on MODIS NDVI data,combined with average annual temperature(AAT)and annual precipitation(AP)collected from 187 meteorological reference stations from 2000 to 2012 in northern China,this paper analyzed the spatio-temporal characteristics of NDVI and dynamic change of AAT and AP in past 13 years. The result showed that:(1)The grassland in most study areas doesnt appear significant change trend,and the main type is desert grassland;From view of change region,the degraded region(accounting for 23.97%of the grassland in northern China)is slightly greater than that of improved region(accounting for 11.68%of the grassland in northern China),its main type is shrubland and typical grassland.(2)The principal part of the grassland in northern China is stable relatively in recent 13 years,which accounts for 68.37%.Among them, the desert grassland has less change,and its area in relatively stable condition accounts for 79.73%of this type of grassland.The shrubland and typical grassland have great change,and account for 41.55%and 45.92%, and their area of the coefficient of variation less than 1.5 accounts for 91.42%in the past 13 years.This shows that most of grassland in northern China is in a relatively stable status.(3)The region with a slight increasing trend of the AAT is larger than that with a decreasing trend of the AAT.The area of increasing temperature accounts for 54.04%of the grassland in northern China,the maximum increasing magnitude of AAT is 0.159℃·a~(-1);The region with increasing trend of the AP is significantly larger than that with a decreasing trend of the AP.The area of increasing precipitation accounts for 71.01%of the grassland in northern China,the maximum increasing magnitude of AP is 23.29 mm·a~(-1).
中文关键词	中国北方草地 ; 气候因子 ; 变异系数
英文关键词	NDVI grassland in northern China NDVI coefficient of variation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5527294
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233783
作者单位	1.兰州大学草地农业科技学院草地, 农业生态系统国家重点实验室, 兰州, 甘肃 730020, 中国; 2.新疆林业科学院, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	张仁平,冯琦胜,郭靖,等. 20002012年中国北方草地NDVI和气候因子时空变化[J]. 兰州大学,2015,35(5):1403-1412.
APA	张仁平,冯琦胜,郭靖,尚振艳,&梁天刚.(2015).20002012年中国北方草地NDVI和气候因子时空变化.中国沙漠,35(5),1403-1412.
MLA	张仁平,et al."20002012年中国北方草地NDVI和气候因子时空变化".中国沙漠 35.5(2015):1403-1412.