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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Specifying Air-Sea Exchange Coefficients in the High-Wind Regime of a Mature Tropical Cyclone by an Adjoint Data Assimilation Method
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Specifying Air-Sea Exchange Coefficients in the High-Wind Regime of a Mature Tropical Cyclone by an Adjoint Data Assimilation Method

机译：通过伴随数据同化方法指定成熟热带气旋高风区域的海-气交换系数

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References(13) Cited-By(6) Supplementary materials(1) Uncertainty in the values of air-sea exchange coefficients has a detrimental effect on tropical cyclone (TC) modeling. Since a TC is one of the most destructive disasters, a method is required to reduce such uncertainty with respect to scientific progress and disaster prevention. In this study, we investigate the feasibility of specifying air-sea exchange coefficients in the high-wind regime of a mature TC by an identical twin experiment using the adjoint data assimilation method. The forward integration is executed by an intermediate cloud-resolving atmosphere-ocean coupled model, while the datasets for the backward integration are sampled as in multiple aircraft missions. Our results show that the air-sea exchange coefficients are successfully improved toward the “True” values. The updated air-sea exchange coefficients yield persistent improvements in the maximum wind speed, the radius of maximum wind, the radius of strong updraft, and in the distribution of water vapor. Without adjustment of the exchange coefficients, the analysis field of the inner-core is contaminated, even if the initial state is modified by the adjoint method.
机译：参考文献（13）被引用的文献（6）补充材料（1）气-海交换系数值的不确定性对热带气旋（TC）建模有不利影响。由于TC是最具破坏性的灾难之一，因此需要一种方法来减少科学进步和防灾方面的不确定性。在这项研究中，我们研究了通过伴生数据同化方法进行的同卵双生实验，在成熟TC的强风条件下指定海气交换系数的可行性。前向集成由中间的云解析大气-海洋耦合模型执行，而后向集成的数据集则像在多个飞机任务中一样进行采样。我们的结果表明，海气交换系数已成功地朝“真”值提高。更新的海气交换系数在最大风速，最大风半径，强上升气流半径和水蒸气分布方面产生了持续的改善。在不调整交换系数的情况下，即使通过伴随方法修改了初始状态，内芯的分析场也会受到污染。

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