2001-2013年华北地区植被覆盖度与干旱条件的相关分析
赵舒怡, 宫兆宁, 刘旭颖

Correlation analysis between vegetation coverage and climate drought conditions in North China during 2001-2013
ZHAO Shuyi, GONG Zhaoning, LIU Xuying
表1 PDSI干湿等级
Tab. 1 Palmer Drought Severity Index ranges and classes
干旱指数值 等级 干旱指数值 等级
≥ 4.00 极端湿润 -1.99~-1.00 轻微干旱
3.00~3.99 严重湿润 -2.99~-2.00 中等
2.00~2.99 中等湿润 -3.99~-3.00 严重干旱
1.00~1.99 轻微湿润 ≤-4.00 极端干旱
-0.99~0.99 正常