SGER: Modeling the Atmospheric Circulation Over the Arctic

拟议的项目将在T42、T85和T170分辨率下执行和分析气候共同体模式（CCM）的非耦合大气模式相互比较项目（AMIP-2）类型集成。PI将测试模拟海平面压力（SLP）的偏差是否由以下原因引起：（i）地形上气流分辨率不足，特别是格陵兰岛，（ii）瞬态环流分辨率不足，包括表面对北方高纬度风暴路径中气旋生成和气旋演变的影响，（iii）由于模型物理学的原因，云和大气辐射的模拟效果不佳;（iv）海冰表面边界条件过于简单。改进北极地面风和SLP的GCM模拟是获得北极气候有用的耦合模拟的先决条件。这项工作很重要，因为它将为CSM项目提供强有力的诊断基础，该项目来自一个大学小组，该小组从事高纬度观测到的气候变率的动态诊断。

The proposed project will perform and analyze uncoupled Atmospheric Model Intercomparison Project (AMIP-2) type integrations of the Climate Community Model (CCM) at T 42, T85 and T170 resolutions. The PIs will test if biases in simulated sea level pressure(SLP) are caused by (i) insufficient resolution of flow over orography, especially Greenland, (ii) insufficient resolution of transient circulations including surface effects on cyclogenesis and cyclone evolution in the storm tracks of high northern latitutes, (iii) poor simulation of clouds and atmospheric radiation due to model physics and (iv) over-simplification in the prescribed surface boundary conditions over sea ice. Improving GCM simulations of arctic surface winds and SLP is a prerequisite to obtaining useful coupled simulations of the arctic climate. The work is important because it will provide strong diagnostics underpinning to the CSM project from a university based group engaged in dynamical diagnosis of observed climate variability at high latitudes.