北极大气边界层初步模拟试验

应用一维K闭合OSUPBL模式和ARCSCM极地柱模式,采用SHEBA观测资料和ECM- WF的输出结果作为模式的初始场和外强迫场,对SHEBA试验所在地(75°N,150°W)单点的北极大气边界层特征,进行了初步的模拟并与SHEBA资料进行对比分析。研究表明,这两个模式都具有较好地模拟单点北极大气边界层特征的能力。OSUPBL模式在垂直高度上的高分辨率,使其能够更好地反映大气边界层内部的细微变化特征。ARCSCM模式中考虑了比较多的物理过程,且需要提供比较完整的初始场、边界条件和侧向强迫,并每小时更新,模拟结果更符合实际情况。对模式的不足和下一步的研究也进行了讨论。

PRELIMINARY NUMERICAL SIMULATION FOR ARCTIC ATMOSPHERE BOUNDARY LAYER

The characteristics of polar atmosphere boundary layer have remarkable response to the flux variation at ocean-air interface in polar region.Both Ocean-Atmosphere-Ice Interactions (OAII)research and the Surface Heat Budget of the Arctic Ocean(SHEBA)project show that the study of structure and physical characteristics of polar atmosphere boundary layer is very im- portant for learning ocean-air interface flux and polar environmental change.The research on the polar ocean-air interface flux and the polar atmosphere boundary layer is briefly introduced in this paper and the preliminary numerical simulations are carried out by using a simple one- dimensional K-closure model and an Arctic single-column model,respectively.The output data from the European Centre for Medium-Range Weather Forecast(ECMWF)model are used as the lateral forcing in the simulation and the results from the simulation are analyzed and com- pared with the SHEBA data in the paper.