水利学报2017，Vol.48Issue(5)：535-544,550,11.DOI:10.13243/j.cnki.slxb.20160701
气候变化对科尔沁沙地蒸散发和植被的影响
Simulated impacts of climate change on evapotranspiration and vegetation in Horqin Sandy Land
摘要
Abstract
Vegetation degraded significantly in Horqin Sandy Land over the past three decades.Identifying the variability of the key ecohydrological processes (such as evapotranspiration and vegetation growth) that are closely related to desertification is prerequisite for a better control of desertification processes in the future.Based on an ecohydrological cellular automata model,the Water and Vegetation Interactions-based Eco-hydrological Model (WaVEM) was developed and employed to evaluate the effects of the precipitation and potential evapotranspiration changes on the actual evapotranspiration (Et) and leaf area index,and to analyze the responses of vegetation to the multi-year precipitation reduction.During 1964-2013,Et and annual maximum LAI (LAImax) had insignificant trends while precipitation changed insignificantly and potential evapotranspiration increased significantly.The precipitation change was the major factor causing the decreases of both Et and LAImax while the effect of potential evapotranspiration was the second.Multi-year precipitation reduction during 1999-2011 caused significant vegetation degradation in Horqin sandy land.A short-term drought could lead to a sudden decline in vegetation,however,vegetation recovered quickly after the drought.关键词
蒸散发/植被变化/生态水文模型/科尔沁沙地/气候变化Key words
evapotranspiration/vegetation change/ecohydrological model/Horqin Sandy Land/climate change分类
天文与地球科学引用本文复制引用
王思如,雷慧闽,段利民,刘廷玺,杨大文..气候变化对科尔沁沙地蒸散发和植被的影响[J].水利学报,2017,48(5):535-544,550,11.基金项目
国家自然科学基金项目(51369016,51609139,51139002),水沙科学与水利水电工程国家重点实验室课题(2014-KY-04) （51369016,51609139,51139002）
