Scholarlink

<p>Marine heatwaves (MHWs) are characterized by extremely high water temperatures persisting for at least several consecutive days, and their severe ecological and economic impacts have been increasing. In this study, the impacts of interannual-to-decadal sea surface temperature (SST) variability on MHWs in 10 areas around Japan were evaluated using daily satellite-based SST data from 1983 to 2022. To evaluate these impacts, MHWs were detected using SST without the interannual-to-decadal variability, while keeping the threshold for the MHW detection unchanged. As a result, the annual MHW days averaged for the 10 areas were reduced by 53% and 13% when applying high-pass filters with 1-year and 10-year cutoffs, respectively. This indicates that interannual-to-decadal variability affected the MHWs around Japan while the recent increase in MHWs was attributed to a warming trend, as the annual days of the MHWs detected using detrended SST from the 2010s were reduced by 66%. To clarify the influence of climate modes on MHWs around Japan, MHWs were detected using SST without the variability synchronized with each mode. It was found that the climate modes defined from North Pacific SST affected the MHWs around Japan. In particular, the third EOF mode of the North Pacific SST profoundly altered the MHWs around Japan.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Marine heatwaves around Japan over the past four decades: Links to interannual-to-decadal variability of sea surface temperature

  • 期刊论文

  • 发表日期：

    2026年5月19日

查看全文
  • Yusuke Ushijima,
  • Kei Sakamoto,
  • Koji Yagi,
  • Yuma Kawakami,
  • Hiroki Togawa,
  • Haruka Sasaki,
  • Yoshikazu Fukuda

摘要

Marine heatwaves (MHWs) are characterized by extremely high water temperatures persisting for at least several consecutive days, and their severe ecological and economic impacts have been increasing. In this study, the impacts of interannual-to-decadal sea surface temperature (SST) variability on MHWs in 10 areas around Japan were evaluated using daily satellite-based SST data from 1983 to 2022. To evaluate these impacts, MHWs were detected using SST without the interannual-to-decadal variability, while keeping the threshold for the MHW detection unchanged. As a result, the annual MHW days averaged for the 10 areas were reduced by 53% and 13% when applying high-pass filters with 1-year and 10-year cutoffs, respectively. This indicates that interannual-to-decadal variability affected the MHWs around Japan while the recent increase in MHWs was attributed to a warming trend, as the annual days of the MHWs detected using detrended SST from the 2010s were reduced by 66%. To clarify the influence of climate modes on MHWs around Japan, MHWs were detected using SST without the variability synchronized with each mode. It was found that the climate modes defined from North Pacific SST affected the MHWs around Japan. In particular, the third EOF mode of the North Pacific SST profoundly altered the MHWs around Japan.