Development of a flexible data assimilation system for a 3D unstructured-grid ocean model under Earth System Modeling Framework

IF 3.1 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Ocean Modelling Pub Date : 2025-04-01 DOI:10.1016/j.ocemod.2025.102546

Hao-Cheng Yu , Y. Joseph Zhang , Lars Nerger , Carsten Lemmen , Jason C.S. Yu , Tzu-Yin Chou , Chi-Hao Chu , Chuen-Teyr Terng

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引用次数: 0

Abstract

We develop a new data assimilative (DA) system by combining two parallel frameworks: the Parallel DA Framework (PDAF) and the Earth System Modeling Framework (ESMF). The new DA system is built on ESMF at the top level driving PDAF and any combination of Earth system model (ESM) components, thereby allowing maximum flexibility and ease of implementation of DA in fully coupled ESM applications, with minimal intrusive code changes to the original model components. We demonstrate the new DA system using the 3D unstructured-grid ocean model SCHISM as the ESM component. The new system is validated using both simple benchmarks and a realistic simulation of the Kuroshio current system around Taiwan. The new system improves the model skill for temperature and surface elevation before, during and after typhoon events. The flexibility and ease of implementation make the new system widely applicable for other coupled ESMs, thus paving the way for a new generation of data assimilative cross-scale ESMs.

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地球系统建模框架下三维非结构网格海洋模型灵活数据同化系统的开发

本文将并行数据同化框架（PDAF）和地球系统建模框架（ESMF）相结合，开发了一个新的数据同化（DA）系统。新的数据处理系统建立在顶层驱动PDAF和地球系统模型（ESM）组件的任何组合的ESMF上，从而允许在完全耦合的ESM应用程序中实现最大的灵活性和易用性，并且对原始模型组件进行最小的侵入性代码更改。我们使用三维非结构网格海洋模型SCHISM作为ESM组件来演示新的数据分析系统。新系统使用简单的基准测试和对台湾黑潮电流系统的真实模拟进行了验证。新系统提高了台风发生前、期间和之后的温度和地表海拔的模式技能。新系统的灵活性和易于实现性使其广泛适用于其他耦合esm，从而为新一代数据同化跨尺度esm铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean Modelling 地学-海洋学

CiteScore

5.50

自引率

9.40%

发文量

审稿时长

19.6 weeks

期刊介绍： The main objective of Ocean Modelling is to provide rapid communication between those interested in ocean modelling, whether through direct observation, or through analytical, numerical or laboratory models, and including interactions between physical and biogeochemical or biological phenomena. Because of the intimate links between ocean and atmosphere, involvement of scientists interested in influences of either medium on the other is welcome. The journal has a wide scope and includes ocean-atmosphere interaction in various forms as well as pure ocean results. In addition to primary peer-reviewed papers, the journal provides review papers, preliminary communications, and discussions.