新疆NDVI时空特征及气候变化影响研究
慈晖, 张强

Spatio-temporal Patterns of NDVI Variations and Possible Relations with Climate Changes in Xinjiang Province
CI Hui,ZHANG Qiang
表1 年均NDVI变化趋势
Tab. 1 Statistics of tendency of annual average NDVI
NDVI变化趋势 等级 面积(km2 占全疆比例/%
θslope<-0.009 严重退化 42 016 0.87
-0.009≤θslope <-0.0045 中度退化 178 960 3.72
-0.0045≤θslope<-0.001 轻微退化 777 316 16.15
-0.001≤θslope<0.001 基本不变 2 959 714 61.50
0.001≤θslope<0.0045 轻微改善 599 140 12.45
0.0045≤θslope<0.009 中度改善 167 875 3.49
θslope≥0.009 明显改善 87 564 1.82