The Mongolian and Tibetan Plateaus have experieneed warming higher than the global average in recent decades, resulting in many significant changes to ecosystem structures and functions. Among items that show change a...The Mongolian and Tibetan Plateaus have experieneed warming higher than the global average in recent decades, resulting in many significant changes to ecosystem structures and functions. Among items that show change are the leaf area in dex (LAI) and evapotranspirati on (ET), both of which play a fun dame ntal role in shapi ng many causes and conseque nces of la nd surface processes and climate. This study examines the spatiotemporal changes of the LAI and ET and their relationships on these two roofing Iandscapes. Based on the MODIS products from 2000 through 2014, we found that there existed a gen era I positive relationship betwee n LAI and ET on the Mongolia Plateau (MP), while synergy did not exist on the Tibetan Plateau (TP). Overall, 49.38%(50.62%) of land areas on the TP experieneed significant increases (decreases) in LAI, while on the MP the percentages of increase and decrease were 94.92%(5.09%). For ET, the increased land area was 21.70%(124100 km^2) on the TP and 88.01%(341600 km^2) on the MP. More importantly, the relationships varied substantially across space and over time, with mismatches found in some parts of the Iandscapes. Additional observational investigations and/or experime ntal research are n eeded to explore the relati on ships, including the in flue nces of vegetation characteristics and disturbances.展开更多
基金National Key Research and Development Program of China(2017YFB0503005)The Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19050501,XDA19040305)+1 种基金National Natural Science Foundation of China(41601100)The International Postdoctoral Exchange Fellowship Program 2015 by the Office of China Postdoctoral Council(No.38 Document of OCPC,2015)
文摘The Mongolian and Tibetan Plateaus have experieneed warming higher than the global average in recent decades, resulting in many significant changes to ecosystem structures and functions. Among items that show change are the leaf area in dex (LAI) and evapotranspirati on (ET), both of which play a fun dame ntal role in shapi ng many causes and conseque nces of la nd surface processes and climate. This study examines the spatiotemporal changes of the LAI and ET and their relationships on these two roofing Iandscapes. Based on the MODIS products from 2000 through 2014, we found that there existed a gen era I positive relationship betwee n LAI and ET on the Mongolia Plateau (MP), while synergy did not exist on the Tibetan Plateau (TP). Overall, 49.38%(50.62%) of land areas on the TP experieneed significant increases (decreases) in LAI, while on the MP the percentages of increase and decrease were 94.92%(5.09%). For ET, the increased land area was 21.70%(124100 km^2) on the TP and 88.01%(341600 km^2) on the MP. More importantly, the relationships varied substantially across space and over time, with mismatches found in some parts of the Iandscapes. Additional observational investigations and/or experime ntal research are n eeded to explore the relati on ships, including the in flue nces of vegetation characteristics and disturbances.
