Spatially explicit reconstruction of cropland cover in Europe from AD 1800 to 2000  

作　　者：Jun LI Yu YE Xiuqi FANG Diyang ZHANG Zhilei WU 

机构地区：[1]Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China [2]Key Laboratory of Environmental Change and Natural Disaster,Ministry of Education,Beijing Normal University,Beijing 100875,China [3]College of Geographical Science,Qinghai Normal University,Xining 810016,China

出　　处：《Science China Earth Sciences》2024年第9期2953-2971,共19页中国科学（地球科学英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2017YFA0603304)。

摘　　要：One of the challenges in global change research is the significant uncertainty in global historical land use and land cover(LUCC)datasets,which are widely used as foundational data.In addition to the regional cropland area reconstructions,improving the grid allocation method is another feasible way to raise the reliability of historical LUCC data.In this study,an integrated reconstruction of the national cropland areas over the past 200 years was developed for 36 European countries.After that,the allocation algorithm was built using physiogeographic variables and historical city sites for accounting for land suitability and cultivation preferences,respectively.Finally,cropland data in Europe with a spatial resolution of 5′×5′at five time sections from AD 1800 to 2000 were generated using the optimal allocation algorithm in accordance with the stages of the regional history.The results were as follows:(1)The dominant factors governing the distribution of croplands in Europe vary at different agricultural stages,but the results can be merged together.Land suitability was more optimal for allocation during the modern agricultural stage(AD 1950 and 2000);the priority index combined with land suitability and cultivation preference was more reasonable for allocation during the traditional agricultural stage(AD 1800).The average of the allocations by priority index and the land suitability could be adopted as the allocation results during the transitional stage(AD 1850 and 1900)because the grids for absolute differences within±10 and±20 percentage points between the results obtained from the above two allocations were above 80% and 95%,respectively,which means the two allocation results could be merged.(2)Over the past 200 years,the total cropland area in Europe first increased to a peak in AD 1900 and then decreased.Spatially,the centre of the higher cropland fraction shifted from the western part of Europe in AD 1800 to the eastern part of the continent after AD 1950.(3)Both the cropland area and the spatial di

关 键 词：Land use and land cover change Historical cropland Gridding allocation EUROPE Past 200 years 

分 类 号：P208[天文地球—地图制图学与地理信息工程] F35[天文地球—测绘科学与技术]