Physics
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3813404l&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 13, CiteID L13404
Physics
2
Global Change: Abrupt/Rapid Climate Change (4901, 8408), Global Change: Regional Climate Change (4321), Hydrology: Climate Impacts (4321), Hydrology: Evapotranspiration, Hydrology: Hydroclimatology
Scientific paper
Pan-evaporation (Epan) as the indicator of atmospheric evaporative demand has decreased worldwide with climate change in the last decades, which is called “Pan Evaporation Paradox”. This study investigates the recent changes in Epan dynamics in China using the observed Epan records for the period 1960-2007. The records show that Epan decreased in China from 1960 to 1991 by -5.4 mm yr-2. The attribution results show that the significant decreases (P < 0.001) in wind speed and solar radiation offset the effect of increasing air temperature and led to the decrease in Epan. However, the observed Epan has increased since 1992 by 7.9 mm yr-2. From 1992 to 2007, the amplitude of increase in air temperature rose seriously, while the amplitude of decrease in wind speed declined and solar radiation even increased insignificantly (P > 0.1). The results show that increasing air temperature dominated the change in Epan, which offset the effect of wind speed and led to the increase in Epan.
Liu Changming
Liu Xiaomang
Luo Yuzhou
Zhang Dan
Zhang Minghua
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