基于MODIS数据的潞安矿区NPP时空格局

摘要

基于EOS/MODIS卫星遥感数据,运用ArcGIS9.3统计与分析模块对2001—2006年潞安矿区生态系统NPP从时、空变化两个角度进行了研究分析。结果表明：时间异质性上,2001—2003年间的矿区绝大部分区域NPP大于0.2 kg/m2,而2004—2006年间NPP低于0.2 kg/m2,即研究时段内矿区NPP呈显著减少趋势;空间异质性上,NPP分布格局与海拔高程、降水量关系较为密切,但与纬向、经向地带性没有直接关系,低山丘陵区NPP数值多在0.25 kg/m2以上,平原河谷区多小于0.2 kg/m2;究其时空格局影响因素,矿区NPP时间异质性主要与煤炭开采、农业耕作等人类活动联系紧密,空间异质性多与地形地貌、植被类型、年降水量等自然因子相关。%Based on EOS/MODIS satelite remote sensing data and using spatial analysis module of ArcGIS9.3,analysed the temporal and spatial characters of vegetation NPP in Lu＇an mining area from 2001 to 2006.As to temporal heterogeneity,the net primary production from 2001 to 2003 is higher than 0.2 kg/m2 in most area while it is lower than 0.2 kg/m2 from 2004 to 2006.This significant decreasing trend deserves more attention.As to spatial heterogeneity,NPP pattern are closely related with both elevation and precipitation,but no direct relationship with latitude and longitude.The NPP data are up to 0.25 kg/m2 in low mountain and hill regions while NPP are less than 0.2 kg/m2 in plain or valley regions.The temporal changes of NPP are resulted from human activities,including coal mining and agriculture farming,while the spatial changes of NPP are related with natural factors,such as topography,vegetation types and precipitation,etc.