过去千年中亚五国耕地变化数据集(1000‒2000)

Reconstruction Dataset of Cropland Change in Five Central Asian Countries over the Last Millennium

土地利用/土地覆盖变化(land use and cover change,LUCC)是全球变化研究的重要任务,耕地作为人类土地利用的重要方式之一,是历史LUCC数据集重建的重点。本研究基于历史文献重建了过去千年中亚五国耕地面积总量,并利用格网化分配模型重建出分辨率为5'×5'的过去千年中亚五国格网化耕地覆盖。研究发现,1000-2000年中亚五国耕地面积变化可划分出“平稳中存在波动-增长-下降”三个阶段;耕地主要分布在沿河流分布的绿洲中,随着时间增长呈现向外扩张趋势;1850年以后,耕地的扩张主要发生在哈萨克斯坦北部地区。本数据集数据量为8.61 MB(压缩为1个文件,422 KB),主要包括以.xlsx格式储存的过去千年中亚五国耕地面积总量表格和以.img格式储存的过去千年中亚五国耕地5'×5'格网化分布情况。

Reconstructing land use and cover change(LUCC)is an important task for global change research.As one of the important ways to use land,cropland is the focus for the reconstruction of historical land cover datasets.This study reconstructed the total cropland area of five Central Asian countries over the last millennium based on historical documents and used a gridded allocation algorithm to develop gridded cropland fraction data with a spatial resolution of 5'×5'.The main conclusions are as follows:(1)the change in cropland area in five Central Asian countries between 1000 A.D.and 2000 A.D.had three phases of"steady with fluctuations-growth-decline".(2)The cropland is mainly distributed in oases along rivers,with a tendency to expand outward over time.(3)After 1850 A.D.,the increase in cropland area mainly occurred in the northern part of Kazakhstan.This dataset includes tables of total cropland area in five Central Asian countries for the last millennium archived in.xlsx data format and preserved 5'×5'gridded cropland fractions of five Central Asian countries over the last millennium archived in.img data format with a data size of 8.61 MB(compressed into one single file with 422 KB).