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Forests 2014, 5(10), 2542-2560;

Impacts of Deforestation and Climate Variability on Terrestrial Evapotranspiration in Subarctic China

State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, No.19 Xinjiekou Street, Beijing 100875, China
Department of Geographical Sciences, University of Maryland, College Park, MD 20742, USA
Institute of Remote Sensing and GIS, Peking University, No.5 Yiheyuan Road, Beijing 100871, China
Author to whom correspondence should be addressed.
Received: 26 June 2014 / Revised: 6 October 2014 / Accepted: 20 October 2014 / Published: 23 October 2014
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Although deforestation affects hydrological and climatic variables over tropical regions, its actual contributions to changes in evapotranspiration (ET) over subarctic China remain unknown. To establish a quantitative relationship between deforestation and terrestrial ET variations, we estimated ET using a semi-empirical Penman (SEMI-PM) algorithm driven by meteorological and satellite data at both local and regional scales. The results indicate that the estimated ET can be used to analyse the observed inter-annual variations. There is a statistically significant positive relationship between local-scale forest cover changes (∆F) and annual ET variations (∆ET) of the following form: ∆ET = 0.0377∆F – 2.11 (R2 = 0.43, p < 0.05). This relationship may be due to deforestation-induced increases in surface albedo and a reduction in the fractional vegetation cover (FVC). However, the El Niño/Southern Oscillation (ENSO), rather than deforestation, dominates the multi-decadal ET variability due to regional-scale wind speed changes, but the exact effects of deforestation and ENSO on ET are challenging to quantify. View Full-Text
Keywords: deforestation; evapotranspiration; subarctic China; climate variability deforestation; evapotranspiration; subarctic China; climate variability

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Yao, Y.; Liang, S.; Cheng, J.; Lin, Y.; Jia, K.; Liu, M. Impacts of Deforestation and Climate Variability on Terrestrial Evapotranspiration in Subarctic China. Forests 2014, 5, 2542-2560.

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