Intercomparison of Model-Estimated Potential Evapotranspiration on the Tibetan Plateau during 1981–2010

Earth Interactions

LuluSong¹ 

关键词: Climate change;    Evapotranspiration;    Model comparison;   

DOI  :  10.1175/EI-D-16-0020.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractPotential evapotranspiration (PET), the maximum evapotranspiration rate under unlimited water supply, reflects the capacity for transpiration flow and plant primary production. Numerous models have been developed to quantify PET, but there are still large uncertainties in PET estimations. In this study, the authors conducted spatially explicit estimations of daily PET from 1981 to 2010 for eight different land-cover types on the Tibetan Plateau by applying three types of PET models including a combination model (Penman–Monteith), a radiation-based model (Priestley–Taylor), and a temperature-based model (Thornthwaite). This study found that the PET estimated by Thornthwaite model (PETT) was lower than those estimated by Priestley–Taylor (PETPT) and Penman–Monteith models (PETPM). Penman–Monteith model gave the highest estimates of PET on annual and daily scales. The mean annual PET for the whole plateau estimated by these three models varied from 675.1 to 700.5 mm yr−1, and daily PET varied from 1....

【 授权许可】

Unknown