
File name: blogERSSTv5Nov24.png
Original Resolution: 2093 × 1348
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2-year history of sea surface temperatures in the Niño-3.4 region of the tropical Pacific for all strong El Niño events since 1950 (gray lines) and the recent (2023-24) event (purple line). Five of the eight gray lines dip below the dashed blue line (the La Niña threshold) in the winter following the El Niño. Graph by Emily Becker based on monthly Niño-3.4 index data from CPC using ERSSTv5.