Research press release


Nature Communications

Climate sciences: Marine heatwaves on the rise



今回、Eric Oliverたちの研究グループは、1900~2016年の海面温度の人工衛星観測データと現場観測データを分析し、1925~1954年と1987~2016年の各期間に海の熱波の頻度が全球平均で34%上昇し、熱波の継続期間が全球平均で17%長くなったことを明らかにした。Oliverたちは、その原因として、平均海洋温度の全球的上昇を挙げており、内部変動が地域レベルで一定の役割を果たしているが、長期的傾向には影響しないことも明らかにした。


Marine heatwaves have become longer and more frequent over the last century, reports a study published in Nature Communications this week. The research shows that annual marine heatwave days have increased by 54% from 1925 to 2016, with an accelerating trend since 1982.

Prolonged periods of anomalously high ocean surface temperatures, known as marine heatwaves, are extreme climate events that can have detrimental effects on marine ecosystems leading to substantial ecological and economic impacts. Ongoing warming has been observed extensively in the upper ocean; however, trends in extreme temperatures have not been examined on a global scale.

Eric Oliver and colleagues analyse satellite and in-situ observations of sea surface temperature from 1900-2016 and show that between 1925-1954 and 1987-2016 marine heatwave frequency increased by an average of 34% and marine heatwave duration by 17% globally. They attribute this to a global increase in mean ocean temperatures, and although internal variability has a role at the regional level, it does not affect long-term trends.

The authors suggest that given the likelihood of continued ocean surface warming throughout the 21st century, and the accelerating trend observed in recent decades, we can expect a continued global increase in marine heatwaves in future, with implications for marine biodiversity.

doi: 10.1038/s41467-018-03732-9

「Nature 関連誌注目のハイライト」は、ネイチャー広報部門が報道関係者向けに作成したリリースを翻訳したものです。より正確かつ詳細な情報が必要な場合には、必ず原著論文をご覧ください。

メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週最新のNature 関連誌のハイライトを皆様にお届けいたします。