A prototype two-decade fully-coupled fine-resolution CCSM simulation
A prototype two-decade fully-coupled fine-resolution CCSM simulation
复制标题
DOI：
10.1016/j.ocemod.2011.02.011
复制
发表时间：
2011-01-01
期刊：
影响因子：
3.2
通讯作者：
Worley, Patrick H.
中科院分区：
文献类型：
--
作者：
McClean, Julie L.;Bader, David C.;Worley, Patrick H.
使用社区气候系统模式(CCSM)的完全耦合全球模拟是使用海洋和海冰0.1度、大气和陆地0.25度的网格分辨率配置的，并在目前的温室气体条件下运行了20年。它代表着以如此高的水平分辨率模拟行星系统的首批努力之一。大气和上层海洋环流的气候学与观测数据和再分析产品进行了比较，以确定持续的平均气候偏差。该模式产生的主要偏差是极地涡旋增强和收缩，以及北半球亚极和中纬度地区的海洋表面温度(SST)过低。强烈的4级气旋在热带北太平洋自发形成。对一次这样的事件的海洋响应的个例研究表明，现实中形成了冷的SST尾迹，混合层加深，混合层下方变暖。然而，由于热带东太平洋的海温过高，北太平洋形成了太多的热带气旋。在北大西洋，异常低的海温导致飓风稀少。阿古拉涡旋路径比在大气再分析中强制进行的等效独立海洋模拟更真实。(C)2011爱思唯尔有限公司。保留所有权利。
A fully coupled global simulation using the Community Climate System Model (CCSM) was configured using grid resolutions of 0.1 degrees for the ocean and sea-ice, and 0.25 degrees for the atmosphere and land, and was run under present-day greenhouse gas conditions for 20 years. It represents one of the first efforts to simulate the planetary system at such high horizontal resolution. The climatology of the circulation of the atmosphere and the upper ocean were compared with observational data and reanalysis products to identify persistent mean climate biases. Intensified and contracted polar vortices, and too cold sea surface temperatures (SSTs) in the subpolar and mid-latitude Northern Hemisphere were the dominant biases produced by the model. Intense category 4 cyclones formed spontaneously in the tropical North Pacific. A case study of the ocean response to one such event shows the realistic formation of a cold SST wake, mixed layer deepening, and warming below the mixed layer. Too many tropical cyclones formed in the North Pacific however, due to too high SSTs in the tropical eastern Pacific. In the North Atlantic anomalously low SSTs lead to a dearth of hurricanes. Agulhas eddy pathways are more realistic than in equivalent stand-alone ocean simulations forced with atmospheric reanalysis. (C) 2011 Elsevier Ltd. All rights reserved.