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朱司光与合作者在科学通报上发表论文
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Hotspots of the sensitivity of the land surface hydrological cycle to climate change
HUA WenJian1, CHEN HaiShan1, ZHU SiGuang2, SUN ShanLei1,3, YU Miao1 & ZHOU LiMing4
1 Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2 College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China; 3 Applied Hydrometeorological Research Institute, Nanjing University of Information Science & Technology, Nanjing 210044, China; 4 Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY 12222, USA.
Abstract Due to the shortage of the global observational data of the terrestrial hydrological variables, the understanding of how surface hydrological processes respond to climate change is still limited. In this study, the Community Land Model (CLM4.0) with high resolution atmospheric forcing data is selected to simulate the global surface hydrological quantities during the period 1948–2006 and to investigate the spatial features of these quantities in response to climate change at the regional scales. The sensitivities of evaporation and runoff with respect to the dominant climate change factors (e.g. temperature and precipitation) derived from the concept of climate elasticity are introduced. Results show that evaporation has a declining trend with a rate of 0.7 mm per decade, while runoff shows a weak increasing trend of 0.15 mm per decade over the global land surface. Analyses of the hotspots in the hydrological cycle indicate that the spatial distributions for evaporation and runoff are similar over many areas in central Asia, Australia, and southern South America, but differ largely in high latitudes. It is also found that, the evaporation hotspots in arid regions are mainly associated with the changes in precipitation. Our sensitive analysis suggests that the hydrological quantities show a rather complicated spatial dependency of response of the water cycle to the different climate factors (temperature and precipitation).
KEY WORDS: hydrological cycle, hotspots, climate sensitivity, climate change
PUBLISHED BY: CHINESE SCIENCE BULLETIN, 2013, 58 (30): 3682-3688.
DOWNLOAD PDF: http://link.springer.com/content/pdf/10.1007/s11434-013-5846-7.pdf |
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