2026-08-27 ミシガン大学
This map of the tropical Pacific shows the ranking of ocean surface temperature extremes in July 2026, with the darkest red areas experiencing the warmest conditions for any July on record. El Niño conditions are defined by the temperature in the green rectangle, and the green circle indicates the location of the Galápagos Islands. Image credit: Julia Cole, University of Michigan, modified from Mercator Ocean International
＜関連情報＞
- https://news.umich.edu/el-ninos-more-intense-over-last-40-years-than-previous-1000-according-to-u-m-study/
- https://www.science.org/doi/10.1126/science.ady2660
過去千年間の古気候記録における東太平洋ENSOの最近の強化 Recent strengthening of eastern Pacific ENSO in the last millennium paleorecord
J. E. Cole, D. M. Thompson, K. A. Dyez, C. J. Tripp, […] , and R. L. Edwards
Science Published:27 Aug 2026
DOI:https://doi.org/10.1126/science.ady2660
Abstract
The Pacific El Niño–Southern Oscillation (ENSO) generates climate extremes that endanger ecosystems, infrastructure, and human well-being worldwide. The response of this system to climate warming is poorly constrained, due both to data scarcity and uncertainties in climate models. The geochemistry of Galápagos coral skeletons across the past millennium reveals a large recent increase in interannual variability of sea surface temperature in the eastern equatorial Pacific compared to existing paleorecords that exceeds simulated natural variability. This increase parallels rising global temperature and results from stronger El Niño events. Central Pacific coral data also show increased variability, although less distinctly than in the Galápagos. Our results provide long-term context for understanding ENSO variability trends, with troubling implications for climate extremes.
