{"id":29706,"date":"2026-02-16T22:16:31","date_gmt":"2026-02-17T03:16:31","guid":{"rendered":"https:\/\/site.extension.uga.edu\/climate\/?p=29706"},"modified":"2026-02-16T22:16:32","modified_gmt":"2026-02-17T03:16:32","slug":"cpc-adopts-relative-oceanic-nino-index-roni-for-tracking-of-enso","status":"publish","type":"post","link":"https:\/\/site.extension.uga.edu\/climate\/2026\/02\/cpc-adopts-relative-oceanic-nino-index-roni-for-tracking-of-enso\/","title":{"rendered":"CPC adopts Relative Oceanic Ni\u00f1o Index (RONI) for tracking of ENSO"},"content":{"rendered":"\n<p>NOAA&#8217;s Climate Prediction Center noted that they are updating the index they use to track the rise and fall of El Nino and La Nina to a new index that is less affected by the trend towards rising temperatures than previously-used indices. Here is what they say:  &#8220;The Climate Prediction Center is making the shift to use the\u00a0<a href=\"https:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/enso\/roni\/\">Relative Oceanic Ni\u00f1o Index (RONI)<\/a>\u00a0to better designate past events and predict future ENSO. The traditional Oceanic Ni\u00f1o Index (ONI) relies on a departure from 30-year average that struggles to keep pace with anomalous changes in tropical sea surface temperature (SST), which is particularly problematic in real-time when using a time lagged climatology. RONI solves this problem by comparing the ENSO region to the global tropics, thereby reducing the dependency on the climate base period.&#8221; You can read more about it and view their information circular at <a href=\"https:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/enso\/roni\/announcement.php\">https:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/enso\/roni\/announcement.php<\/a>. You can also see their newly reclassified historical index for years back to 1950 at <a href=\"https:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/enso\/roni\/\">https:\/\/www.cpc.ncep.noaa.gov\/products\/analysis_monitoring\/enso\/roni\/<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/site.extension.uga.edu\/climate\/files\/2026\/02\/image-6.png\"><img loading=\"lazy\" decoding=\"async\" width=\"655\" height=\"342\" src=\"https:\/\/site.extension.uga.edu\/climate\/files\/2026\/02\/image-6.png\" alt=\"\" class=\"wp-image-29707\" srcset=\"https:\/\/site.extension.uga.edu\/climate\/files\/2026\/02\/image-6.png 655w, https:\/\/site.extension.uga.edu\/climate\/files\/2026\/02\/image-6-300x157.png 300w\" sizes=\"auto, (max-width: 655px) 100vw, 655px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>NOAA&#8217;s Climate Prediction Center noted that they are updating the index they use to track the rise and fall of El Nino and La Nina to a new index that is less affected by the trend towards rising temperatures than previously-used indices. Here is what they say: &#8220;The Climate Prediction Center is making the shift [&hellip;]<\/p>\n","protected":false},"author":58,"featured_media":29707,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,22],"tags":[],"class_list":["post-29706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate-science","category-el-nino-and-la-nina"],"_links":{"self":[{"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/posts\/29706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/users\/58"}],"replies":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/comments?post=29706"}],"version-history":[{"count":1,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/posts\/29706\/revisions"}],"predecessor-version":[{"id":29708,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/posts\/29706\/revisions\/29708"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/media\/29707"}],"wp:attachment":[{"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/media?parent=29706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/categories?post=29706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/site.extension.uga.edu\/climate\/wp-json\/wp\/v2\/tags?post=29706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}