滇黔桂岩溶区NDVI变化及其与气候因子的耦合关系  

NDVI variation and coupling relation with climate factors in Yunnan-Guizhou-Guangxi karst area

作　　者：靖娟利[1] 王永锋[2] JING Juan - li WANG Yong-feng(a. College of Geomatics and Geoinformatio b. Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin 541004, Chin)

机构地区：[1]桂林理工大学测绘地理信息学院,广西桂林541004 [2]桂林理工大学广西空间信息与测绘重点实验室,广西桂林541004

出　　处：《桂林理工大学学报》2017年第1期146-153,共8页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41261088);广西"八桂学者"岗位专项经费资助项目;广西空间信息与测绘重点实验室项目(130511411;140452408);广西中青年教师基础能力提升项目(KY2016YB192)

摘　　要：利用1998—2012年SPOT NDVI数据和气象站点的温度和降水数据,采用趋势分析和相关系数法,研究了滇黔桂岩溶NDVI时空变化特征,并分析了NDVI与气候因子的关系。研究表明:(1)近15年来,滇黔桂岩溶区NDVI年际和季节变化均呈增加趋势;(2)从年际变化来看,NDVI与温度呈正相关的站点略多于负相关的;而NDVI与降水量呈正相关和负相关的站点基本相当,说明温度对研究区植被生长的影响略大于降水量;(3)从年内变化来看,春季和秋季NDVI变化受降水量影响较大,而冬季受温度影响较显著;不同季节温度和降水量对植被NDVI变化的综合作用具有差异性;生长季NDVI受当月水热因子的影响较大,没有表现出明显的滞后效应。The spatial and temporal variation of NDVI and its response to climate change in Yunnan - Guizhou -Guangxi karst area of China during 1998 -2012 are researched based on SPOT NDVI data and temperature/ precipitation data from meteorological stations by linear regression and correlation analysis. Results show that ：（1） In the past 15 years, both the annual and seasonal NDVI increased. （ 2） At the annual time scale, the site with positive correlation between NDVI and temperature was slightly high er than negative correlation , while the site with positive correlation between rainfall and NDVI were almost equal to negative correlat ion site. The above analysis illustrated that the influence of temperature on the growth of vegetation was slightly greater than that of precipitation. （3） At the monthly time scale, NDVI variat ion was greatly in fluenced by ra in fallin spring and autumn, while significantly influenced by temperature in winter. Temperature and precipitation had different comprehensive effect on vegetation NDVI with season variation. Growing season NDVI was strongly in flue nced by hydrothermal factor during the month, and there was no obvious lag effect.

关 键 词：滇黔桂岩溶区 NDVI 气候因子 相关分析 耦合关系 

分 类 号：P237[天文地球—摄影测量与遥感] TP79[天文地球—测绘科学与技术]