Summer Southern Hemisphere [new] May 2026

The Southern Ocean is warming and freshening due to increased glacial melt from Antarctica. This alters thermohaline circulation and reduces summer sea ice extent around Antarctica, with profound implications for albedo feedback and marine ecosystems.

During the austral summer, the Sun’s direct rays strike the Tropic of Capricorn (23.5°S) at the December solstice. As a result, locations south of the Antarctic Circle (66.5°S) experience 24-hour daylight. Conversely, the Northern Hemisphere receives lower solar intensity, marking its winter. summer southern hemisphere

Observed trends show increasing frequency, duration, and intensity of heatwaves across Australia, southern South America, and South Africa. The warming rate over land in mid-latitudes of the Southern Hemisphere has accelerated since 1980, exacerbated by reduced soil moisture and land-atmosphere feedbacks. The Southern Ocean is warming and freshening due