基于MODIS植被指数的藏北高原植被物候空间分布特征

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	基于MODIS植被指数的藏北高原植被物候空间分布特征
	游松财 1; 宋春桥 2; 柯灵红 2; 刘高焕 2; 钟新科 2
刊名	生态学杂志
	2011
卷号	30 期号:7 页码:1513-1520
关键词	物候藏北高原动态阈值 MODIS 植被指数
ISSN号	1000-4890
其他题名	Spatial distribution characteristics of vegetation phenology in northern Tibetan Plateau based on MODIS enhanced vegetation index
英文摘要	基于非对称高斯拟合算法重建了2001—2010年的MODIS EVI时间序列影像,利用动态阈值法提取2001—2010年各年藏北高原植被覆盖的关键物候参数(生长季峰值、返青期、枯黄期及生长季长度),并在此基础上分析了藏北高原植被覆盖的物候参数空间分布特征。结果表明:植被生长季EVImax、物候返青期及生长季长度均表现出从东南到西北过渡的水平地带性与东南高山峡谷区的垂直地带性相结合的空间格局;对于不同地表覆盖类型,EVImax、返青期、生长季长度均呈现农林混合区>林灌区>草甸>草原>荒漠草原的特征,枯黄期除农林混合区较迟外,其他4种地表覆盖类型时间接近;对于不同气候区划,植被生长季EVImax、返青期、生长季长度表现出半湿润区→半干旱区→干旱区的递变规律;研究区内植被物候受地形影响较大,随着海拔的升高,植被生长季EVImax降低、物候返青期推迟、生长季长度减小。; In this paper,the 2001-2010 time-series TERRA/MODIS EVI dataset of northern Tibetan Plateau was reconstructed by asymmetric Guassian function fitting method,and the yearly key vegetation phenological parameters including the maximum EVI(EVImax)in growth season,growth season length,green-up date,and wilting date of typical grassland plants in the region in 2001-2010 were extracted with dynamic threshold method.On these bases,the spatial distribution patterns of the vegetation phenology in northern Tibetan Plateau were analyzed.For the typical grassland plants in the region,their EVImax in growth season,growth season length,and green-up date all showed the spatial distribution of horizontal transition from southeast to northwest and vertical zonation in southeastern Nagqu mountain topography,and the three phenological parameters all decreased in the order of mixed agriculture-forestry zone > forest and shrub > meadow > steppe > desert steppe.As for the wilting date,it was obviously later in mixed agriculture-forestry zone than in other vegetation cover types.Considering for different climatic zones,the EVImax in growth season,growth season length,and green-up date all performed the order of sub-humid area > semi-arid zone > arid zone.Besides,with the increase of altitude,the EVImax in growth season became smaller,growth season length became shorter,and green-up date postponed.
学科主题	植物学
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/17163]
专题	农业环境与可持续发展研究所_农业减灾研究室
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 北京, 100081 2.中国科学院地理科学与资源研究所, 资源与环境信息系统国家重点实验室, 北京, 100101
推荐引用方式 GB/T 7714	游松财,宋春桥,柯灵红,等. 基于MODIS植被指数的藏北高原植被物候空间分布特征[J]. 生态学杂志,2011,30(7):1513-1520.
APA	游松财,宋春桥,柯灵红,刘高焕,&钟新科.(2011).基于MODIS植被指数的藏北高原植被物候空间分布特征.生态学杂志,30(7),1513-1520.
MLA	游松财,et al."基于MODIS植被指数的藏北高原植被物候空间分布特征".生态学杂志 30.7(2011):1513-1520.