The scene is beautiful, but the real story is below the waves.<\/p>\n Currents and eddies stretched the bloom into wisps and spirals, while a huge underwater rise helped bring together the light and nutrients needed for microscopic life to multiply.<\/p>\n Why the green ring formed<\/p>\n Phytoplankton<\/a> are tiny organisms that use sunlight to grow, much like plants on land.<\/p>\n When enough light and nutrients<\/a> reach the same patch of ocean, their numbers can increase until the water changes color and the bloom becomes visible from orbit.<\/p>\n How can hidden terrain paint the sea above it?<\/p>\n The Chatham Rise<\/a> is a broad underwater plateau roughly 500 miles long and 185 miles wide, with deep water on both sides.<\/p>\n Its shape helps hold the boundary where cold, nutrient-rich Antarctic water meets warmer, nutrient-poor subtropical water.<\/p>\n January falls in the Southern Hemisphere summer, when long days provide more sunlight.<\/p>\n Once the bloom formed, surface currents pulled it into loops, filaments, and swirls around the islands.<\/p>\n The phytoplankton became a moving map of the ocean.<\/p>\n How the satellite spotted it<\/p>\n The image came from the Visible Infrared Imaging Radiometer Suite, known as VIIRS<\/a>, aboard the NOAA-20 satellite<\/a>.<\/p>\n The sensor measures ocean color, and greener water can signal more chlorophyll, the pigment phytoplankton use to capture light.<\/p>\n Satellite color<\/a> can show where a bloom is and how it moves across a huge area.<\/p>\n But the January report did not identify a species, which matters because color alone is not the same as collecting organisms from the water and examining them directly.<\/p>\n Earlier regional blooms offer a clue, not a final answer.<\/p>\n Official images from 2008 and 2009<\/a> said milky turquoise patches could contain coccolithophores<\/a>, microscopic algae wrapped in reflective, chalk-like plates.<\/p>\n For the 2026 halo, however, the confirmed description remains a phytoplankton bloom.<\/p>\n Why tiny plankton matter<\/p>\n Phytoplankton sit at the bottom of much of the marine food web<\/a>.<\/p>\n They feed zooplankton, tiny drifting organisms that are eaten by fish and other animals, so a major bloom can send a pulse of energy through the ecosystem.<\/p>\n The waters around the Chathams support p\u0101ua, a local abalone, along with rock lobster and blue cod.<\/p>\n New Zealand Department of Conservation records<\/a> also list five seal species and 25 whale and dolphin species around the islands.<\/p>\n A 2011 food-web model<\/a> by marine scientist Matthew Pinkerton at New Zealand\u2019s National Institute of Water and Atmospheric Research divided the Chatham Rise ecosystem into 28 major groups.<\/p>\n The model connected phytoplankton with zooplankton, deep-water fish, seabirds, seals, and whales, showing how many parts of the region depend on the same flow of energy.<\/p>\n A bloom with a history<\/p>\n This was not the first vivid bloom seen around the Chatham Islands.<\/p>\n Satellites recorded<\/a> a ring in November 2008, broad swirls across the rise in December 2009, and another large green-blue display in December 2010.<\/p>\n Those earlier events make the 2026 image look less like a one-time surprise and more like a recurring seasonal feature.<\/p>\n Still, one photograph cannot predict the next fishing season or prove a long-term climate shift. A snapshot is not a trend.<\/p>\n A natural laboratory from orbit<\/p>\n Repeated satellite observations can reveal when blooms appear, how far they spread, and how currents reshape them.<\/p>\n Direct sampling is still needed to confirm the species in the water and measure the local conditions behind each event.<\/p>\n Lauren Dauphin prepared the image from VIIRS data, and Lindsey Doermann wrote the official report.<\/p>\n What looks like a green halo is really a surface signature of sunlight, nutrients, moving water, and seafloor geography<\/a> working together.<\/p>\n The official observation has been published by NASA Earth Observatory<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read?\u00a0Subscribe to our newsletter<\/a>\u00a0for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on\u00a0EarthSnap<\/a>, a free app brought to you by\u00a0Eric Ralls<\/a>\u00a0and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"A satellite image captured on January 10, 2026, shows bright green and chalky blue water curling into a…\n","protected":false},"author":2,"featured_media":560027,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[111,139,69,147],"class_list":["post-560026","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-new-zealand","tag-newzealand","tag-nz","tag-science"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/560026","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=560026"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/560026\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/560027"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=560026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=560026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=560026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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\n<\/a><\/p>\n