首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Multistatistics metric evaluation of ocean general circulation model sea surface temperature: Application to 0.08° Pacific Hybrid Coordinate Ocean Model simulations
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Multistatistics metric evaluation of ocean general circulation model sea surface temperature: Application to 0.08° Pacific Hybrid Coordinate Ocean Model simulations

机译:海洋一般环流模型海面温度的多统计量度评估:在0.08°太平洋混合坐标海洋模型模拟中的应用

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This study is a multimetric statistical evaluation of interannual and climatological mean sea surface temperature (SST) over the Pacific Ocean (north of 20°S) simulated by an ocean model. The evaluation procedure is outlined using daily and monthly SSTs from eddy-resolving (0.08°) Hybrid Coordinate Ocean Model (HYCOM). Satellite-based products and buoy measurements are used for model-data comparisons. Three are three principal findings. (1) Using monthly mean climatological atmospheric forcing with the addition of a 6-hourly wind component can yield realistic simulations of monthly mean climatological SST in comparison with observations and interannually forced simulations. (2) Nondimensional skill score can be a very useful metric for validating SST from an ocean model in a large region, such as the Pacific Ocean, where the amplitude of the SST seasonal cycle has large spatial variations. The use of skill score is extensively discussed along with its advantages over other traditional metrics. Interannual model-data comparisons (1993–2003) using satellite-based SST give basin-averaged yearly mean skill score values ranging from 0.35 to 0.58 for HYCOM. (3) A comparison of HYCOM to 804 yearlong daily buoy SST time series spanning 1990–2003 gives a median root mean square value of 0.83°C. Relatively small SST biases and high skill values are essential prerequisites for SST assimilation using an ocean model as a first guess and for SST forecasting. The validation procedures presented in this paper include a variety of statistical metrics and use a comprehensive observational buoy data set. Such procedures can be applied to any global- or basin-scale ocean general circulation model that predicts SST.
机译:这项研究是对海洋模型模拟的太平洋(北纬20°S)年际和气候平均海表温度(SST)的多度量统计评估。使用来自解析涡(0.08°)的混合坐标海洋模型(HYCOM)的每日和每月SST概述了评估程序。基于卫星的产品和浮标测量值用于模型数据比较。三是三个主要发现。 (1)与观测和年际强迫模拟相比,使用每月平均气候强迫和6小时风分量的增加可以产生每月平均气候SST的真实模拟。 (2)无量纲技能得分可能是一种非常有用的度量标准,可用于从较大区域(例如,SST季节周期的振幅具有较大的空间变化)的海洋模型中验证SST。技能得分的使用及其相对于其他传统指标的优势已得到广泛讨论。使用基于卫星的SST进行的年度模型数据比较(1993年至2003年)得出的HYCOM流域平均年平均技能得分值为0.35至0.58。 (3)将HYCOM与1990年至2003年的804年的每日浮标SST时间序列进行比较,得出的均方根中值为0.83°C。相对较小的SST偏差和较高的技能值是使用海洋模型作为首次猜测进行SST吸收和进行SST预测的必要先决条件。本文介绍的验证程序包括各种统计指标,并使用全面的观测浮标数据集。这样的程序可以应用于任何预测海温的全球或海盆尺度的海洋总环流模型。

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