Increasing model resolution improves but overestimates global mid-depth circulation simulation.

IF 3.8 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2024-11-26 DOI:10.1038/s41598-024-80152-4

Haihong Guo, Zhaohui Chen, Ruichen Zhu, Jinzhuo Cai

引用次数: 0

Abstract

Increasing the spatial resolution in climate models has significantly improved the simulation of global upper-layer ocean circulation. However, the ability of high-resolution models to accurately reproduce mid-depth circulation, in terms of strength and direction, still remains uncertain. An analysis of 17 climate models with varying resolutions reveals that both low and high-resolution models depict weaker current speeds compared with observations. High-resolution models demonstrate improved simulations of current speed and flow direction, except in the Southern Ocean. The performance of high-resolution models in regions with strong currents is generally better than in regions with weak flows. Dynamically, increasing the model resolution enhances the representation of temporal variations in mid-depth circulation by effectively capturing mesoscale processes. However, this also results in an overestimation of their intensity by approximately 65% on average across the global ocean.

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提高模型分辨率可改善但会高估全球中深层环流模拟。

气候模式空间分辨率的提高大大改善了对全球上层海洋环流的模拟。然而，高分辨率模式在强度和方向方面准确再现中层环流的能力仍不确定。对 17 个不同分辨率的气候模式的分析表明，与观测结果相比，低分辨率和高分辨率模式描述的海流速度都较弱。高分辨率模式对流速和流向的模拟有所改进，南大洋除外。高分辨率模式在强流区域的表现一般好于弱流区域。从动力学角度看，提高模式分辨率可以有效地捕捉中尺度过程，从而增强对中深层环流时变的描述。然而，这也导致对全球海洋中尺度环流强度的平均高估约 65%。

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

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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