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Study of seasonal variability and heat budget of the East Australian Current using two eddy-resolving ocean circulation models

机译：使用两个解析涡旋的海洋环流模型研究东澳大利亚洋流的季节变化和热量收支

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摘要

Two mutually exclusive ocean models, Ocean general circulation model for the Earth Simulator (OFES) and the Bluelink ReANalysis (version 2.1; BRAN2.1), and the spin-up model (SPINUP4) of BRAN2.1 were used to investigate seasonal variability of the East Australian Current (EAC). These model outputs were tested against satellite and in situ data. The seasonally averaged sea surface temperature (SST) in the OFES and SPINUP4 shows a negative bias of 1 °C. However, the OFES, SPINUP4, and BRAN2.1 have a similar seasonal cycle in SST. The annual mean EAC transport computed at 28°S from the three models shows a good agreement with annual mean transport computed using the in situ data. However, they have considerable differences in terms of annual cycle. A better performance of the BRAN2.1 in simulating the temperature field is a result of data assimilation. The advection of heat across the open boundaries contributes ∼50 % of the heat content change in the region. This study suggests that the advection by the EAC plays a significant role in heat content change of the region.
机译：使用两个互斥的海洋模型，即地球模拟器（OFES）和Bluelink ReANalysis（2.1版； BRAN2.1版）的海洋总环流模型以及BRAN2.1的旋转模型（SPINUP4）来研究海洋模拟的季节性变化。东澳大利亚洋流（EAC）。这些模型输出针对卫星和现场数据进行了测试。 OFES和SPINUP4中的季节性平均海表温度（SST）显示为1°C的负偏差。但是，OFS，SPINUP4和BRAN2.1在SST中具有相似的季节性周期。通过这三个模型在28°S处计算出的年均EAC传输量与使用原位数据计算出的年均传输量显示出良好的一致性。但是，它们在年度周期方面有很大差异。 BRAN2.1在模拟温度场方面的更好性能是数据同化的结果。热量跨开放边界的平流贡献了该区域热量含量变化的约50％。这项研究表明，EAC的对流在该区域热量含量的变化中起着重要作用。

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