Global Ocean Temperatures Reach Record High Amidst El Niño Development

Why it matters locally: California, with its extensive coastline and reliance on ocean-related industries like fishing and tourism, is particularly vulnerable to the effects of rising ocean temperatures and intensified El Niño events, which can alter marine ecosystems, exacerbate droughts or flooding, and impact water resources.

Global ocean surface temperatures attained their highest recorded level in July, the European Union's Copernicus Climate Change Service announced. This measurement surpassed previous benchmarks, with July 2023 recording a global average surface temperature of 20.96 degrees Celsius (69.73 degrees Fahrenheit). Researchers observed this temperature increase concurrently with the development of the El Niño weather pattern, which began its intensification in early July. Historically, El Niño brings warmer sea surface temperatures across the Pacific Ocean, influencing global weather patterns. Dr. Samantha Burgess, a deputy director at Copernicus, described the record as a clear indicator of environmental conditions. She noted that oceans absorb a significant amount of the heat generated by human activities, impacting both the climate and marine ecosystems. The previous record for global average ocean surface temperature occurred in March 2016. That year also saw a strong El Niño event. Scientists monitor ocean temperatures as a key metric for understanding climate change and its effects. The sustained warming trend has implications for marine life, weather systems, and sea levels.