地理学报 ›› 2019, Vol. 74 ›› Issue (5): 923-934.doi: 10.11821/dlxb201905007
收稿日期:
2018-03-07
修回日期:
2019-01-23
出版日期:
2019-05-25
发布日期:
2019-05-24
作者简介:
杨帆(1991-), 男, 山西武乡人, 博士生, 主要从事历史土地利用变化研究。E-mail: yangf. 基金资助:
YANG Fan1,2,HE Fanneng1(),LI Meijiao1,2,LI Shicheng3
Received:
2018-03-07
Revised:
2019-01-23
Published:
2019-05-25
Online:
2019-05-24
Supported by:
摘要:
全球历史土地利用数据集对于深入理解全球或区域环境变化具有重要意义。历史森林数据作为其重要组成部分,在区域尺度上的可靠性至今鲜有评估。以中国区域为研究对象,依据中国学者基于历史文献资料重建的中国历史森林数据(CHFD),采用趋势、数量和空间格局等对比法,对全球数据集(SAGE、PJ和KK10)中国森林数据的可靠性进行评估。结果表明:① 虽然全球数据集中国森林数据与CHFD在近300年的变化趋势上均呈减少态势,但数量上差异较大。其中,SAGE数据集对中国1700年以来的森林面积估算较CHFD高出约20%~40%;KK10数据集重建的1700-1850年森林数量则高出约32%~46%;而PJ数据集由于吸纳了区域性研究成果,其总量与CHFD较为接近,多数时点的数量差异低于20%。② 在省区尺度上,从总量与CHFD较为接近的PJ数据集来看,其与CHFD数据集森林变化趋势差异较大省区占到84%,而数量差异较大的省区占比高达92%。③ 在网格尺度上,PJ与CHFD数据集相对差异率> 70%的网格占比高达60%~80%,二者的时空动态格局差异明显。④ 全球数据集中国历史森林数据未能客观反映该区域森林变化的过程与格局特征,造成这一现象的原因在于全球与区域性数据集重建历史数据所依据的资料源不同,以及基于不同空间尺度构建的重建方法的差异等。
杨帆,何凡能,李美娇,李士成. 全球历史森林数据中国区域的可靠性评估[J]. 地理学报, 2019, 74(5): 923-934.
YANG Fan,HE Fanneng,LI Meijiao,LI Shicheng. Reliability assessment of global historical forest data in China[J]. Acta Geographica Sinica, 2019, 74(5): 923-934.
表2
SAGE、PJ、KK10和CHFD数据集中国森林面积与数量差异百分比
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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