New ice core studies expand histories of greenhouse gases and ocean temperature to 3 million years
Oregon State University
Published: 18 March 2026
Ancient Antarctic ice core analyses led by Oregon State revealed that ocean temperatures declined 2-2.5C over 3 million years while atmospheric CO2 showed only modest decline, suggesting other climate system components played key roles.
Keywords: ice cores, ocean temperature, greenhouse gases, paleoclimate, Antarctica, Allan Hills, carbon dioxide, methane
Researchers find harmful algae species was not new to South Australian waters
Commonwealth Scientific and Industrial Research Organisation (CSIRO) Oceans and Atmosphere
Published: 19 March 2026
Archived DNA analysis by CSIRO and partners revealed that Karenia cristata, the species behind South Australia's devastating 2025 algal bloom, has been present at low levels since 2016, indicating environmental changes triggered its dramatic increase.
Keywords: harmful algal bloom, Karenia cristata, eDNA, South Australia, brevetoxin, marine microbiology, IMOS
Interaction of carbon and nutrient cycles overlooked in marine carbon dioxide strategies
University of Rhode Island Graduate School of Oceanography
Published: 9 March 2026
URI researchers found that marine carbon removal strategies may overestimate their long-term impact by overlooking how phosphorus remains trapped in the deep ocean longer than carbon, creating a productivity hangover.
Keywords: marine carbon dioxide removal, nutrient cycles, phosphorus, ocean fertilization, carbon pump, phytoplankton, biogeochemistry
