Item: Development of a Model for Water and Heat Exchange Between the Atmosphere and a Water Body
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Title: Development of a Model for Water and Heat Exchange Between the Atmosphere and a Water Body
Proceedings: Proceedings Whistler 2008 International Snow Science Workshop September 21-27, 2008
Authors:
- Shufen Sun [ LASG, IAP, Chinese Academy of Sciences, Beijing, Chin ]
- Weiping Li [ Division of Climate System Center, National Climate Center, China Meteorological Administration, Beijing, China; ]
- Yao Chu [ Institute of Nechanics, Chinese Academy of Sciences, Beijing, China ]
Date: 2008-09-22
Abstract: A model for studying the heat and mass exchange between the atmosphere and a water body is developed, in which the phase change process of liquid water-ice-snow system freezing in winter and melting in summer and the function of the convective mixing process are taken into consideration. The model uses enthalpy rather than temperature as the predictive variable. It helps to set up governing equations more concisely, to deal with the phase change process more easily, and make the numerical scheme simpler. The model is verified by observed data from Lake Kinneret for a non-frozen lake in summer time, and Lake Lower Two Medicine for a frozen lake in winter time. Reasonably good agreements between the model simulations and observed data indicate that the model can serve as a component for a water body in a land surface model. In order to more efficiently apply the scheme in a climate system model, a sensitivity study of various division schemes with less layers in the vertical direction in the water body is conducted. The results of the study show that the division with around 10 vertical layers could produce a prediction accuracy that is comparable to the fine division with around 40 layers.
Language of Article: English
Presenters: Shufen Sun
Keywords: liquid water-ice-snow system, enthalpy model, convective mixing, model validation
Page Number(s): empty
Subjects: weather
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Digital Article Not Available
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