2001年～2010年重庆地区植被NPP时空变化特征及其与气候因子的关系  

The Spatio-temporal Variation Characteristics of Vegetation NPP in Chongqing and Its Relation with Climatic Factors from2001 to 2010

作　　者：刘琳[1] 李月臣[1,2,3] 朱翠霞[1] 杨扬[1] 李琼瑶[1] 

机构地区：[1]重庆师范大学地理与旅游学院GIS应用研究重庆市高校重点实验室,重庆400047 [2]重庆市气象科学研究所,重庆400047 [3]重庆交通大学土木建筑学院,重庆400047

出　　处：《遥感信息》2013年第5期99-108,共10页Remote Sensing Information

基　　金：重庆市气象局开放基金(kfjj-201103);重庆市博士后科研项目特别资助基金(渝xm201102001)

摘　　要：以2001年～2010年MOD17A3的年均NPP数据为基础,利用GIS技术定量分析了重庆地区植被NPP的时空变化特征及与气候因子的相关性,结果表明:2001年～2010年重庆地区植被NPP整体呈微弱上升趋势,植被覆盖略有增加,且总体分布呈现从南到北递减的趋势;重庆地区植被NPP增加幅度由南到北递减且整体变化幅度较小,仅部分区县变化幅度较大.不同的植被类型的NPP存在差异,其NPP大小顺序为:常绿阔叶林＞草地＞农田植被＞混生林＞常绿针叶林＞落叶阔叶林＞落叶针叶林＞灌丛.就气候因子与植被NPP的相关性而言,NPP与气温的相关性不明显,NPP与降水的相关显著性存在空间差异.By means of average annual Net Primary Productivity(NPP)data of MOD17A3data set from 2001to 2010and by GIS technology quantitative analysis,the temporal and spatial variation of vegetation NPP in Chongqing and the correlation with meteorological factors have been conducted in this paper.The results indicate that:the vegetation NPP in Chongqing increases slowly from 2001to 2010,and vegetation cover increases slightly;more importantly,the overall distribution trend decreases from south to north.The rate of increase of the annual NPP in Chongqing decreases from south to north,and it varies greatly in some districts.Different vegetation types have different NPP,and the order is evergreen broadleaf forest> glassland>farmland vegetation>mix forest>evergreen coniferous forest>deciduous broad-leaved forest>deciduous coniferous forest>scrub.In terms of the impact from climatic factors on vegetation NPP,the annual NPP is not sensitive to temperature in Chongqing from2001to 2010.However,the correlation between NPP and precipitation has spatial differences.

关 键 词：NPP 时空变化特征 气候因子 重庆 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]