气候变化背景下近30年祁连山高寒荒漠分布时空变化

张富广,曾彪,杨太保

Spatiotemporal distribution changes in alpine desert belt in Qilian Mountains under climate changes in past 30 years

ZHANG Fu-Guang,ZENG Biao,YANG Tai-Bao

表3 1990S、2000S和2010S祁连山区高寒荒漠分布面积变化

Table 3 Area change in alpine deserts distribution in the Qilian Mountains (QLM) in the 1990S、2000S and 2010S

年代 Years 1990S 2000S 2010S 祁连山区 QLM 高寒荒漠面积 Alpine desert area (km2) 53 061.69 47 135.91 42 569.46 萎缩量 Shrunk area of the alpine desert (km2) 5 925.79 4 566.45 - 面积变化率 Area change ratio of the alpine desert 0.11 0.10 - 东段 Eastern 高寒荒漠面积 Alpine desert area (km2) 1 926.49 1 805.77 1 720.33 萎缩量 Shrunk area of the alpine desert (km2) 120.72 85.44 - 面积变化率 Area change ratio of the alpine desert 0.06 0.05 - 中段 Middle 高寒荒漠面积 Alpine desert area (km2) 15 221.68 14 019.75 11 710.50 萎缩量 Shrunk area of the alpine desert (km2) 1 201.92 2 309.26 - 面积变化率 Area change ratio of the alpine desert 0.08 0.16 - 西段 Western 高寒荒漠面积 Alpine desert area (km2) 35 936.33 31 310.39 29 138.63 萎缩量 Shrunk area of the alpine desert (km2) 4 625.94 2 171.75 - 面积变化率 Area change ratio of the alpine desert 0.13 0.07 -