Simulations of dissolved oxygen concentration in CMIP5 Earth system models
Simulations of dissolved oxygen concentration in CMIP5 Earth system models
复制标题
CMIP5地球系统模型中溶解氧浓度的模拟
DOI：
10.1007/s13131-016-0959-x
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发表时间：
2016
影响因子：
1.4
通讯作者：
Yangchun Li
中科院分区：
文献类型：
--
作者：
Y. Bao;Yangchun Li
通过将CMIP5（气候模式比对项目第5阶段）9个地球系统模式模拟的海洋溶解氧浓度与WOA09观测值进行比较，基于常用统计指标，定量评价了9个地球系统模式模拟的海洋溶解氧浓度气候学。在海面上，由于模拟良好的海表温度（SST）， 9个esm都能很好地模拟溶解氧的分布，全球平均误差和均方根误差（RMSE）都接近于零，相关系数和归一化标准差都接近于1。然而，在存在重要水团的中深度和深海，模型的性能有所不同。在氧气最小带存在的500 ~ 1 000 m深度，所有esm的全球平均误差和均方根误差最大，空间相关系数最小。在海洋内部，模式偏差的原因是复杂的，经向翻转环流（MOC）和颗粒有机碳通量都是造成溶解氧分布偏差的原因。分析结果表明，物理偏差的影响更大。moc分布所表示的北大西洋深水（NADW）、南极底水（AABW）和北太平洋中间水（NPIW）等重要水团的模拟偏差分别对北大西洋、南大洋和北太平洋的氧分布有较大影响。虽然各模式对海洋内部氧的模拟结果差异较大，但多模式平均值与观测值吻合较好。
The climatologies of dissolved oxygen concentration in the ocean simulated by nine Earth system models (ESMs) from the historical emission driven experiment of CMIP5 (Phase 5 of the Climate Model Intercomparison Project) are quantitatively evaluated by comparing the simulated oxygen to the WOA09 observation based on common statistical metrics. At the sea surface, distribution of dissolved oxygen is well simulated by all nine ESMs due to well-simulated sea surface temperature (SST), with both globally-averaged error and root mean square error (RMSE) close to zero, and both correlation coefficients and normalized standard deviation close to 1. However, the model performance differs from each other at the intermediate depth and deep ocean where important water masses exist. At the depth of 500 to 1 000 m where the oxygen minimum zones (OMZs) exist, all ESMs show a maximum of globally-averaged error and RMSE, and a minimum of the spatial correlation coefficient. In the ocean interior, the reason for model biases is complicated, and both the meridional overturning circulation (MOC) and the particulate organic carbon flux contribute to the biases of dissolved oxygen distribution. Analysis results show the physical bias contributes more. Simulation bias of important water masses such as North Atlantic Deep Water (NADW), Antarctic Bottom Water (AABW) and North Pacific Intermediate Water (NPIW) indicated by distributions of MOCs greatly affects the distributions of oxygen in north Atlantic, Southern Ocean and north Pacific, respectively. Although the model simulations of oxygen differ greatly from each other in the ocean interior, the multi-model mean shows a better agreement with the observation.
影响因子：
56.9
作者：
Stramma, Lothar;Johnson, Gregory C.;Mohrholz, Volker
通讯作者：
Mohrholz, Volker