Improved Treatment of Surface Turbulent Fluxes over Sea Ice: Towards a Unified Parameterization over Land, Ocean, and Snow/Ice in Climate Models

该项目力求在气候模型中更好地理解和表现海洋和陆地上大气和冰雪之间的动荡交换。主要目标是：(A)海冰上大气湍流表面通量的不同参数化方案的相互比较，(B)改进海冰上粗糙度长度的计算，以及非常稳定条件下的湍流交换系数的计算，(C)量化湍流通量参数化对海洋和陆地上雪/冰模拟的影响，以及(D)在全球气候模拟中评估陆地、海洋和海冰上统一的湍流通量参数化的影响。该项目将为研究生提供培训，而研究成果将纳入本科生和研究生教学课程。

This project seeks to improve the understanding and representation, in climate models, of the turbulent exchanges between the atmosphere and snow and ice over oceans and land. The principal objectives are (a) the intercomparison of various parameterization schemes for atmospheric turbulent surface fluxes over sea ice, (b) improving the computation of roughness lengths over sea ice, as well as the turbulent exchange coefficients under very stable conditions, (c) quantifying the impacts of turbulent flux parameterization on the simulation of snow/ice over ocean and land, and (d) evaluating the impact of a unified turbulent flux parameterization over land, ocean and sea ice in a global climate simulation.The improved formulations expected from this project could be adopted in the NCAR Community Climate System Model for community-wide use. The project will provide training for graduate students, while research results will be included in undergraduate and graduate teaching courses.