The Impact of Horizontal Resolution on North American Monsoon Gulf of California Moisture Surges in a Suite of Coupled Global Climate Models
The Impact of Horizontal Resolution on North American Monsoon Gulf of California Moisture Surges in a Suite of Coupled Global Climate Models
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DOI：
10.1175/jcli-d-16-0199.1
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发表时间：
2016-10
影响因子：
4.9
通讯作者：
S. Pascale;S. Bordoni;S. Kapnick;G. Vecchi;L. Jia;T. Delworth;S. Underwood;W. Anderson
中科院分区：
文献类型：
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作者：
S. Pascale;S. Bordoni;S. Kapnick;G. Vecchi;L. Jia;T. Delworth;S. Underwood;W. Anderson
在地球物理流体动力学实验室（GFDL）开发的一套全球环流模式（CM2.1，FLOR，CM2.5，CM2.6和HiFLOR）中，研究了大气和海洋水平分辨率对北美季风加州湾（GoC）水汽潮气候学的影响。这些模式具有基本相同的物理参数化，但在大气（200、50和25公里）或海洋（0.1 °、0.25°和0.1°）中的水平分辨率不同。增加水平大气分辨率从200到50公里的结果在一个巨大的改善模型的准确模拟浪涌事件的能力。气候近地面流和水分和降水异常与GOC浪涌总体上令人满意的模拟在所有较高分辨率的模式。浪涌事件的数量同意与再分析，但模型往往低估7月至8月浪涌相关的降水和高估9月浪涌相关的降雨在东南部。
AbstractThe impact of atmosphere and ocean horizontal resolution on the climatology of North American monsoon Gulf of California (GoC) moisture surges is examined in a suite of global circulation models (CM2.1, FLOR, CM2.5, CM2.6, and HiFLOR) developed at the Geophysical Fluid Dynamics Laboratory (GFDL). These models feature essentially the same physical parameterizations but differ in horizontal resolution in either the atmosphere (≃200, 50, and 25 km) or the ocean (≃1°, 0.25°, and 0.1°). Increasing horizontal atmospheric resolution from 200 to 50 km results in a drastic improvement in the model’s capability of accurately simulating surge events. The climatological near-surface flow and moisture and precipitation anomalies associated with GoC surges are overall satisfactorily simulated in all higher-resolution models. The number of surge events agrees well with reanalyses, but models tend to underestimate July–August surge-related precipitation and overestimate September surge-related rainfall in the sou...