全球历史森林数据中国区域的可靠性评估
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杨帆,何凡能,李美娇,李士成
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Reliability assessment of global historical forest data in China
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YANG Fan,HE Fanneng,LI Meijiao,LI Shicheng
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表2 SAGE、PJ、KK10和CHFD数据集中国森林面积与数量差异百分比
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Tab. 2 Forest area of China and its quantity variance among SAGE, PJ, KK10 and CHFD datasets
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| 年份 | CHFD森林
面积(万km2) | SAGE | | PJ | | KK10 | | 森林面积(万km2) | 数量差异率
(%) | 森林面积(万km2) | 数量差异率
(%) | 森林面积(万 km2) | 数量差异率
(%) | | 1700 | 241.27 | 296.00 | 20.44 | | 265.23 | 9.47 | | 333.04 | 32.23 | | 1720 | 235.58 | 286.40 | 19.53 | 256.30 | 8.43 | 339.63 | 36.58 | | 1740 | 229.89 | 276.80 | 18.57 | 246.37 | 6.92 | 318.04 | 32.46 | | 1760 | 222.81 | 267.20 | 18.17 | 236.41 | 5.92 | 311.20 | 33.41 | | 1780 | 214.34 | 257.60 | 18.38 | 226.41 | 5.48 | 303.65 | 34.83 | | 1800 | 205.87 | 248.00 | 18.62 | 216.35 | 4.97 | 299.10 | 37.35 | | 1820 | 194.99 | 238.00 | 19.93 | 206.22 | 5.60 | 294.55 | 41.25 | | 1840 | 184.11 | 228.00 | 21.38 | 195.91 | 6.21 | 292.50 | 46.29 | | 1860 | 172.74 | 218.00 | 23.27 | 185.66 | 7.21 | | | | 1880 | 160.88 | 208.00 | 25.69 | 176.21 | 9.10 | | | | 1900 | 149.02 | 200.00 | 29.42 | 167.80 | 11.87 | | | | 1920 | 133.48 | 190.00 | 35.31 | 158.20 | 16.99 | | | | 1940 | 117.94 | 177.00 | 40.60 | 144.44 | 20.27 | | | | 1960 | 87.88 | 169.00 | 65.39 | 143.98 | 49.37 | | | | 1980 | 111.92 | 167.00 | 40.02 | 144.86 | 25.80 | | |
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