Preindustrial Control Simulations With HadGEM3‐GC3.1 for CMIP6
Preindustrial Control Simulations With HadGEM3‐GC3.1 for CMIP6
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DOI：
10.1029/2018ms001495
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发表时间：
2018-12
影响因子：
6.8
通讯作者：
M. Menary;T. Kuhlbrodt;J. Ridley;M. Andrews;O. Dimdore-Miles;J. Deshayes;R. Eade;L. Gray;S. Ineson;J. Mignot;C. Roberts;J. Robson;R. Wood;P. Xavier
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作者：
M. Menary;T. Kuhlbrodt;J. Ridley;M. Andrews;O. Dimdore-Miles;J. Deshayes;R. Eade;L. Gray;S. Ineson;J. Mignot;C. Roberts;J. Robson;R. Wood;P. Xavier
使用第三个哈德利中心全球环境模型进行的工业化前控制模拟，在气象局统一模型 (HadGEM3‐GC3.1) 的全球耦合配置 3.1 中运行，以两种分辨率进行呈现。它们是N216ORCA025，其在大气中的水平分辨率为60公里，在海洋中的水平分辨率为0.25°，以及N96ORCA1，其在大气中的水平分辨率为130公里，在海洋中的水平分辨率为1°。这项研究的目的是记录这些模拟中的气候变化，与当前的观测结果进行比较（尽管在不同的强迫下），并讨论由于分辨率而产生的差异。就气候变化主要模式的年际变化而言，这两个决议的表现通常非常相似。显着的差异在于厄尔尼诺现象的西移范围和大西洋数十年变率的模式，其中 N216ORCA025 与观测结果相比更有利，而南极绕极流则在 N216ORCA025 中太弱。在北大西洋地区，N216ORCA025具有更强、更深的大西洋经向翻转环流，与观测结果相比较，并减少了北大西洋副极地环流的温度和盐度偏差。这些模拟将提供给第六个耦合模型比对项目（CMIP6），并提供可以评估进一步强制实验的基线。
Preindustrial control simulations with the third Hadley Centre Global Environmental Model, run in the Global Coupled configuration 3.1 of the Met Office Unified Model (HadGEM3‐GC3.1) are presented at two resolutions. These are N216ORCA025, which has a horizontal resolution of 60 km in the atmosphere and 0.25° in the ocean, and N96ORCA1, which has a horizontal resolution of 130 km in the atmosphere and 1° in the ocean. The aim of this study is to document the climate variability in these simulations, make comparisons against present‐day observations (albeit under different forcing), and discuss differences arising due to resolution. In terms of interannual variability in the leading modes of climate variability the two resolutions behave generally very similarly. Notable differences are in the westward extent of El Niño and the pattern of Atlantic multidecadal variability, in which N216ORCA025 compares more favorably to observations, and in the Antarctic Circumpolar Current, which is far too weak in N216ORCA025. In the North Atlantic region, N216ORCA025 has a stronger and deeper Atlantic Meridional Overturning Circulation, which compares well against observations, and reduced biases in temperature and salinity in the North Atlantic subpolar gyre. These simulations are being provided to the sixth Coupled Model Intercomparison Project (CMIP6) and provide a baseline against which further forced experiments may be assessed.