学术活动
学术活动
首页
>> 学术活动 >> 学术活动
学术活动  
Maximum Entropy Production Model of Evapotranspiration and Surface Heat Fluxes
发布日期:2016-07-29浏览次数: 来源:水院 字号:[ ]

报告人:Jingfeng Wang 副教授,美国乔治亚理工学院

时间:201681日下午2:00-3:00

地点:水院楼101

报告人简介:Jingfeng Wang博士分别于1984年和1987年在北京大学获得应用力学和流体力学学士和硕士学位,1997年在美国麻省理工学院获水文气象学博士学位, 之后在麻省理工学院从事博士后研究及研究助理工作。2012年开始在美国乔治亚理工学院任副教授。主要从事水文气象、陆面水文方面的研究工作。

报告简介:A new model of energy budgets over the Earth’s surface was formulated based on the principle of maximum entropy production (MEP). Built on the theory of Bayesian probability, information, non-equilibrium thermodynamics, and boundary layer turbulence, analytical solutions of the partition of surface radiative fluxes into evapotranspiration (ET) and (turbulent and/or conductive) heat fluxes are derived as functions of surface temperature and humidity. Compared to the classical models, the MEP modeled ET and surface heat fluxes: (1) close surface energy balance at all space and time scales; (2) are independent of gradient variables (i.e. temperature and moisture), wind speed and surface roughness parameters, (3) valid for the entire range of soil moisture from dryness to saturation over land surfaces, and (4) are not sensitive to the uncertainties of model input and parameters and free of empirical tuning parameters. It is the first physically based atmospheric humidity-gradient and vapor pressure deficit independent ET model for all land-cover types. The MEP model has been tested extensively against in-situ observations over bare soil and canopy as well as water, snow and ice surfaces. The MEP model may be used as a retrieval algorithm for remote sensing of ET and surface fluxes and a physical parameterization of surface energy budgets in coupled local, regional and global land-atmosphere models.

 

联系人:霍再林     电话:62736762

 

【打印本页】 【关闭本页】