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与黑潮延伸体大弯曲相关的海洋热浪对2023年9月极端降水的影响。

Effects of a marine heatwave associated with the Kuroshio Extension large meander on extreme precipitation in September 2023.

作者信息

Hirata Hidetaka, Kawamura Ryuichi, Nonaka Masami

机构信息

Department of Data Science, Faculty of Data Science, Rissho University, Kumagaya, Japan.

Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University, Fukuoka, Japan.

出版信息

Sci Rep. 2025 Feb 13;15(1):5332. doi: 10.1038/s41598-025-88294-9.

DOI:10.1038/s41598-025-88294-9
PMID:39948147
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11825860/
Abstract

In 2023, the Kuroshio Extension (KE) exhibited an unusually large meander (LM) path, which caused a significant increase in sea surface temperatures, a marine heatwave (MHW), to the east of Japan. Although this MHW has the potential to influence heavy precipitation, it has not yet been examined. Here, we address this issue by examining an extreme precipitation event that occurred in Japan in September 2023 using high-resolution cloud-resolving numerical experiments. Results indicated that the MHW contributed to an increase in surface precipitation by ~ 300 mm, accounting for ~ 70% of the total precipitation. This precipitation intensification was attributed to the MHW-enhanced atmospheric instability and its influence on the formation and positioning of surface fronts. This research suggests that the KE-LM-induced MHW has elevated the risk of heavy precipitation in Japan, with significant societal implications. These findings could be applied to other regions such as the Northeastern United States.

摘要

2023年，黑潮延伸体（KE）呈现出一条异常大的弯曲路径，导致日本东部海面温度显著升高，形成了一次海洋热浪（MHW）。尽管此次海洋热浪有可能影响强降水，但尚未得到研究。在此，我们通过使用高分辨率云分辨数值实验，研究2023年9月在日本发生的一次极端降水事件来解决这一问题。结果表明，海洋热浪使地面降水增加了约300毫米，占总降水量的约70%。这种降水增强归因于海洋热浪增强的大气不稳定及其对地面锋面形成和位置的影响。这项研究表明，由黑潮延伸体-大弯曲（KE-LM）引发的海洋热浪增加了日本强降水的风险，具有重大的社会影响。这些发现可应用于美国东北部等其他地区。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/05abed797ac4/41598_2025_88294_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/c7102cd0f09a/41598_2025_88294_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/ab5fce5dc91c/41598_2025_88294_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/ce1286ba1fa3/41598_2025_88294_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/05abed797ac4/41598_2025_88294_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/c7102cd0f09a/41598_2025_88294_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/0b1c2c322348/41598_2025_88294_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/8c4049548ccd/41598_2025_88294_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/16718a1736da/41598_2025_88294_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/ab5fce5dc91c/41598_2025_88294_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/ce1286ba1fa3/41598_2025_88294_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf74/11825860/05abed797ac4/41598_2025_88294_Fig7_HTML.jpg

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本文引用的文献

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Sci Rep. 2024 Jul 19;14(1):16100. doi: 10.1038/s41598-024-65291-y.
2
Vertical structures of marine heatwaves.海洋热浪的垂直结构。
Nat Commun. 2023 Oct 14;14(1):6483. doi: 10.1038/s41467-023-42219-0.
3
Understanding physical drivers of the 2015/16 marine heatwaves in the Northwest Atlantic.理解 2015/16 年北大西洋西北海域海洋热浪的物理驱动因素。
Sci Rep. 2021 Sep 2;11(1):17623. doi: 10.1038/s41598-021-97012-0.
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Nat Commun. 2019 Jun 14;10(1):2624. doi: 10.1038/s41467-019-10206-z.
5
Impacts of a warming marginal sea on torrential rainfall organized under the Asian summer monsoon.变暖边缘海对亚洲夏季风期间组织的暴雨的影响。
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