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That missing surge removed a seasonal food boost and left reefs in warmer water<\/a> for longer.<\/p>\n Where records broke<\/p>\n Along Panama\u2019s Pacific coast, waters that typically cool each dry season remained unusually warm instead.<\/p>\n Analyzing long-term observations, Aaron O\u2019Dea documented that the expected drop in temperature and surge in productivity did not occur in 2025.<\/p>\n Across four decades, this seasonal shift had arrived predictably each year, making its complete absence in 2025 a clear break from the historical pattern.<\/p>\n That disruption points to a change in the forces that drive this cycle, raising the need to examine what failed and why.<\/p>\n How the cycle works<\/p>\n Each dry season, strong northerly winds push surface water offshore, and that opening lets colder deep water rise.<\/p>\n Scientists call that rise upwelling, when deep ocean<\/a> water reaches the surface and brings nutrients with it.<\/p>\n Those nutrients feed phytoplankton, tiny drifting plants that feed the sea, and the bloom spreads energy through the food web.<\/p>\n Because that process also cools nearshore water, fish and corals usually enter Panama\u2019s dry months with extra help.<\/p>\n What the ocean showed<\/p>\n History made the anomaly easy to spot, because the seasonal drop had arrived by January 20 in every earlier year.<\/p>\n In 2025, the ocean did not cool until March 4, more than six weeks later than usual.<\/p>\n The cooler period lasted only 12 days instead of about two months, and the water never reached the colder temperatures seen in past years.<\/p>\n Profiles through the water column showed layered warmth instead of the usual cold rise, leaving little doubt that something broke.<\/p>\n Why the winds failed<\/p>\n Wind strength was not the main surprise, because the bursts that did arrive were close to normal.<\/p>\n Frequency crashed instead, with north-blowing winds occurring 74 percent less often across the season<\/a> overall.<\/p>\n Lulls between winds also lasted longer, cutting the total push on surface water even when individual gusts stayed strong.<\/p>\n Once that repeated force weakened, cold water stopped reaching the surface, which helps explain the missing season.<\/p>\n Why reefs worry<\/p>\n Coral reefs lost a yearly cooling buffer when the annual supply of deep cold water failed to arrive.<\/p>\n Earlier work<\/a> on Panamanian reefs found that seasonal cooling helped many corals escape the worst heat during El Nino.<\/p>\n Without that relief, thermal stress, heat that pushes corals beyond normal limits, can build faster and last longer.<\/p>\n A single warm season will not erase a reef, but repeated years like this could make bleaching harder to avoid.<\/p>\n Why 2025 differed<\/p>\n A weak La Nina was in place, but the gulf had endured stronger swings before without losing its yearly cooling.<\/p>\n That contrast suggests this was not a simple rerun of a familiar Pacific climate cycle.<\/p>\n \u201cPanama\u2019s 2025 upwelling failure underscores that regional-scale dynamics, rather than blanket global predictions, are essential for understanding these tropical upwelling systems,\u201d wrote O\u2019Dea.<\/p>\n Local monitoring becomes crucial, because broad climate labels alone cannot tell coastal communities what their next dry season will bring.<\/p>\n Human stakes ashore<\/p>\n Life along Panama\u2019s Pacific shore has been tied to these productive waters for far longer than modern records.<\/p>\n A 2025 review<\/a> of the southern Central American Pacific coast describes a deep human history built around marine resources.<\/p>\n When cold water fails to rise, the first effects reach plankton and small fish that support bigger catches.<\/p>\n That means families who sell or eat coastal fish can feel the damage before any long-term trend is formally measured.<\/p>\n Thin monitoring network<\/p>\n Many tropical upwelling zones stay poorly watched, which means a failure like this could pass without clear proof.<\/p>\n Panama stood out because STRI scientists had satellite data back to 1985 and direct temperature logs reaching to 1995.<\/p>\n Measurements from the S\/Y Eugen Seibold, a sailing research vessel used to study ocean conditions, showed warm water stacked in layers where cold<\/a> water would normally rise.<\/p>\n Because records this long are rare across the tropics, scientists may be undercounting how often vital ocean rhythms fail.<\/p>\n What comes next<\/p>\n Researchers now need to learn whether 2025 was a one-off shock or the first sign of a changing pattern.<\/p>\n A public monitoring page<\/a> shows the STRI team closely tracking the 2026 season week by week.<\/p>\n Early 2026 updates reported strong cooling again, a reminder that one failed year does not prove permanent collapse.<\/p>\n Even so, better forecasts and denser monitoring will matter, because fishing towns cannot plan around a vanished season.<\/p>\n What it means<\/p>\n Panama\u2019s missing cooling showed how quickly a familiar ocean system can falter when the winds that drive it stop repeating.<\/p>\n For a coast where food, reefs, and livelihoods depend on seasonal timing, that lesson is immediate, not theoretical.<\/p>\n The study is published in Proceedings of the National Academy of Sciences<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers have documented that the Gulf of Panama\u2019s seasonal upwelling failed in 2025 for the first time in…\n","protected":false},"author":2,"featured_media":559701,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[49,48,295,66],"class_list":{"0":"post-559700","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-ca","9":"tag-canada","10":"tag-environment","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/559700","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=559700"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/559700\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/559701"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=559700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=559700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=559700"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}