VIKING20X-JRA-short: daily to multi-decadal ocean dynamics under JRA55-do atmospheric forcing

Project: Simulations with the 1/20° nested Atlantic Ocean ocean-sea-ice model VIKING20X - This project provides output for simulations conducted with the 1/20° nested Atlantic Ocean model configuration VIKING20X. It is performed under atmospheric forcing of the past decades, simulating the Atlantic Ocean circulation and hydrography variability on daily to multi-decadal timescales with a spatial resolution sufficient to capture mesoscale processes up to subarctic latitudes.

The model configuration is based on the Nucleus for European Modelling of the Ocean (NEMO; https://doi.org/10.5281/zenodo.1464816) code version 3.6, in combination with the Louvain la Neuve Ice Model (LIM2; https://doi.org/10.1029/97JC00480). The global domain at 1/4° resolution (ORCA025; https://doi.org/10.1007/s10236-006-0082-1) embeds the eddy-rich 1/20° nest using the two-way nesting technique Adaptive Grid Refinement In Fortran (AGRIF; https://doi.org/10.1016/j.cageo.2007.01.009). The nest covers the Atlantic Ocean from 33.5°S to ∼65°N. The atmospheric forcing data are applied through bulk formulae.

Key scientific values:
The “eddy-rich” coverage and the atmospheric forcing provide a configuration that realistically simulates various key aspects of wind-driven and thermohaline ocean dynamics such as large-scale structure of the mean flow, the distribution and strength of mesoscale eddies, western boundary current structures, or the Atlantic Meridional Overturning Circulation.
This configuration allows the possibility to fill observational gaps for the benefit of an improved understanding of the ocean as well as to include or use the high-resolution model output in disciplines like marine biology, marine traffic, ocean health and their societal and economic implications.

A full description and evaluation of the large-scale circulation is given in:
Biastoch et al. 2021, Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X, Ocean. Sci., 17, 1177–1211, https://doi.org/10.5194/os-17-1177-2021.
Summary: VIKING20X-JRA-short (Biastoch et al., 2021) is part of a series of VIKING20X simulations under JRA55-do atmospheric forcing. It is based on a restart from a pre-spun experiment in 1980 (VIKING20X-CORE; see Biastoch et al., 2021) and integrated for the period 1980 to 2019 in the framework of the RACE–Synthesis: Regional Atlantic Circulation and Global Change (https://race-synthese.de).
The applied atmospheric forcing JRA55-do (Tsujino et al., 2020, http://doi.org/10.5194/gmd-13-3643-2020) builds on the Japanese reanalysis product JRA-55 with improvements through the implementation of satellite and several other reanalysis products.

项目：基于1/20°分辨率嵌套式大西洋海洋-海冰模式VIKING20X的数值模拟
本项目提供基于1/20°分辨率嵌套大西洋模式配置VIKING20X开展的数值模拟结果输出。该模拟采用近数十年的大气强迫场，以足以捕捉副北极纬度带中尺度过程的空间分辨率，在逐日至多年代际尺度上模拟大西洋环流与水文变量的时空变化。

该模式配置基于欧洲海洋模式核心框架（Nucleus for European Modelling of the Ocean, NEMO）3.6版本代码，结合卢万-拉讷夫海冰模式（Louvain la Neuve Ice Model, LIM2）构建。1/4°分辨率的全球模式域ORCA025通过双向嵌套技术——Fortran自适应网格细化（Adaptive Grid Refinement In Fortran, AGRIF），嵌入富含中尺度涡的1/20°嵌套计算域。该嵌套域覆盖南纬33.5°至北纬约65°的大西洋海域，大气强迫数据通过总体通量公式实现模式驱动。

核心科学价值：
该模式凭借富含中尺度涡的计算域与精准的大气强迫场，可真实模拟风驱动与热盐海洋动力学的诸多关键过程，包括平均流的大尺度结构、中尺度涡的分布与强度、西边界流结构，以及大西洋经向翻转环流。该配置能够填补海洋观测空白，助力深化对海洋系统的认知，同时可为海洋生物学、船舶交通、海洋健康等学科及其社会经济影响研究提供高分辨率模式输出数据支持。

关于该模式大尺度环流的完整描述与评估详见：Biastoch等（2021）发表于《Ocean Science》的论文《Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X》，第17卷，1177–1211页，DOI: 10.5194/os-17-1177-2021。

数据集摘要：VIKING20X-JRA-short（Biastoch等，2021）是基于JRA55-do大气强迫场的VIKING20X系列模拟的组成部分。该模拟从1980年的模式启动预积分试验（VIKING20X-CORE；详见Biastoch等，2021）的重启文件出发，在"RACE–Synthesis: Regional Atlantic Circulation and Global Change"（https://race-synthese.de）研究框架下，积分时段为1980年至2019年。本研究采用的JRA55-do大气强迫场（Tsujino等，2020，DOI: 10.5194/gmd-13-3643-2020）以日本再分析产品JRA-55为基础，通过融合卫星观测与多套其他再分析产品完成优化改进。

搜集汇总

背景与挑战

背景概述

VIKING20X-JRA-short是VIKING20X模拟系列的一部分，使用JRA55-do大气强迫模拟1980年至2019年大西洋区域的海洋动力学，重点关注大西洋经向翻转环流等关键过程。该数据集采用高分辨率嵌套配置（1/20°嵌套区域嵌入1/4°全球网格），输出格式为NetCDF，大小约25.89 TiB，适用于海洋和气候研究，但数据主要针对特定科学问题设计，用户需谨慎使用。