中国历史土地覆被变化重建研究进展

Review of China's Historical Land Cover Change Reconstructions

为对中国已有区域历史土地覆被数据集有一个综合全面的认识,并为今后的研究方向提供参考,筛选了30篇空间表达清晰的面向全球变化研究的中国历史土地覆被重建文献,从数据源选取与数字提取和订正处理、时间尺度与覆盖时段、空间范围与空间分辨率、重建的主要土地覆被类型几个方面进行总结和评述。主要结论有:历史文献是重建历史土地覆被的最主要数据源,数字提取和订正方法因数据源不同而各异;国外关于历史土地覆被研究的最长时段达过去12 000年,国内研究时段多为过去300年,时间分辨率均以几十年到百年居多;重建研究的空间范围分为中国全国、中国东部和某个行政单元或地理形态上比较完整或典型的区域3种空间尺度系列,第三系列中还存在研究空白区;在不同土地覆被类型的重建方面,现有研究集中于耕地覆被重建。充分利用不同数据源、加强研究空白区内历史土地覆被重建、改进网格化处理方法及已有数据的整合在今后研究中尤为必要。

To have a better understand of China＇ s historical land cover datasets and provide reference for fu- ture reconstruction study, 30 papers on reconstructions of China＇ s historical land cover change were summarized based on the source of data, the extraction and calibration of data, the time period, the time resolution, the spatial scale, the spatial resolution, and the reconstructed land cover types. All datasets of the studies included have clear spatial resolution and are able to serve global change study. The main conclusions are as follows： Historical docu- ments are the main sources of historical land cover change reconstruction and the methods of data＇ s extraction and calibration are different according to their data sources;the longest time period of foreign resultsis from 10000BC to 2000AD, while most of the domestic datasets cover the past 300 years, the main time resolution is decades or cen- turies; there are three types of study areas, including the whole China, the Eastern China and one or several provinces or a region with complete geographic pattern ; the existing change. It is important to make full use of different data sources, land cover change data approaching the international requirement, the existing data. studies still focus on historical cropland cover to enhance to improve the study in the gridding areas with no historical method and to integrate the existing data.