文献类型：期刊文献

中文题名：Comparing Land Degradation and Regeneration Trends in China Drylands

作者：Gabriel Del BARRIO[1] Zhihai GAO[2] Jaime Martinez-VALDERRAMA[1] Xiaosong LI[3] Maria ESANJUAN[1] Bin SUN[2] Alberto RUIZ[1] Bengyu WANG[2] Juan PUIGDEFABREGAS[1]

第一作者：Gabriel Del BARRIO

机构：[1]Estacion Experimental de Zonas Aridas,Consejo Superior de Investigaciones Científicas,Almeria 04001,Spain;[2]Research Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091,China;[3]Key Laboratory of Digital Earth Science,Institute of Remote Sensing&Digital Earth,Chinese Academy of Sciences,Beijing 100094,China

年份：2020

卷号：3

期号：4

起止页码：89-97

中文期刊名：测绘学报：英文版

基金：European Space Agency(No.4000123342/18/I-NB);Science and Technology Service Network Initiative of Chinese Academy of Sciences(No.KFJ-STSZDTP-010-02)。

语种：英文

中文关键词：land degradation;Potential Extent of Desertification in China;environmental monitoring;vegetation temporal trends;standard partial regression coefficients

分类号：X171.1

摘要：The aim of this paper is to offer a statistically sound method to make a precise account of the speed of land degradation and regeneration processes.Most common analyses of land degradation focus instead on the extent of degraded areas,rather than on the intensity of degradation processes.The study was implemented for the Potential Extent of Desertification in China(PEDC),composed by arid,semi-arid,and dry sub-humid regions and refers to the period 2002 to 2012.The metrics were standard partial regression coefficients from stepwise regressions,fitted using Net Primary Productivity as the dependent variable,and year number and aridity as predictors.The results indicate that:①the extension of degrading lands(292896 km 2 or 9.12%of PEDC)overcomes the area that is recovering(194560 km 2 or 6.06%of PEDC);and②the intensity of degrading trends is lower than that of increasing trends in three land cover types(grassland,desert,and crops)and in two aridity levels(semi-arid and dry sub-humid).Such an outcome might pinpoint restoration policies by the Chinese government,and document a possible case of hysteresis.