{"id":2113,"date":"2026-09-20T01:17:00","date_gmt":"2026-09-19T16:17:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-20-indian-ocean-phytoplankton-dipole-en\/"},"modified":"2026-09-20T01:17:00","modified_gmt":"2026-09-19T16:17:00","slug":"2026-09-20-indian-ocean-phytoplankton-dipole-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-20-indian-ocean-phytoplankton-dipole-en\/","title":{"rendered":"Positive and negative Indian Ocean Dipole phases did not change coastal phytoplankton equally"},"content":{"rendered":"

2026-09-20 01:17 KST<\/strong><\/p>\n

The 17 September 2026 study links the asymmetry to Kelvin waves that alter the thermocline, mixing and nutrients, with underwater topography amplifying local responses.<\/p>\n

The two phases are not mirror images: an already nutrient-poor baseline can limit how much further biomass declines.<\/p>\n

Evidence<\/h2>\n

Field observations, remote sensing and model products covered surface and subsurface biomass along a broad eastern coastline.<\/p>\n

Positive phase<\/h2>\n

Easterly wind anomalies generate upwelling Kelvin waves, shoaling the thermocline and bringing nutrients toward the sunlit layer.<\/p>\n

\"Positive
This AI-generated image explains the topic; it is not a photograph of an actual event, observation or field site.<\/figcaption><\/figure>\n

Negative phase<\/h2>\n

Downwelling waves deepen nutrients, but oligotrophic waters have a constrained baseline, producing a smaller response.<\/p>\n

Limits<\/h2>\n

Biomass change is not the same percentage change in fish catch or carbon uptake. Species, food webs, seasons and topography matter.<\/p>\n

Next check<\/h2>\n

More floats and cruises must measure nutrients and community composition and test whether IOD forecasts improve ecological prediction.<\/p>\n

Primary source and independent checks<\/h2>\n

Nature Communications \uc6d0 \ub17c\ubb38<\/a><\/p>\n

Nature India \ub2e4\uc774\ud3f4 \ub3c5\ub9bd \ud574\uc124<\/a><\/p>\n

Columbia Climate School \uad00\ub828 \ud604\uc7a5 \uc5f0\uad6c<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Combining field, satellite and model data, researchers found eastern Indian Ocean coastal phytoplankton biomass rose 27.0\u00b117.0% during positive IOD phases but fell 13.1\u00b15.2% during negative phases. This does not mean all marine life across the Indian Ocean changed by those percentages.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2113","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=2113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}