Global Warming
Scientists warn earth has hit first climate tipping point
International climate scientists have warned in a new report that tropical coral reefs have already crossed their tipping point due to rising ocean temperatures. The Global Tipping Points Report 2025 highlights risks of cascading failures in other climate systems if global warming exceeds 1.5°C. The findings come ahead of the 30th World Climate Conference in Brazil.
Scientists uncover nitrogen-fixing bacteria beneath Arctic sea ice
An international team of researchers has discovered that nitrogen-fixing bacteria thrive beneath Arctic sea ice, challenging previous assumptions about nutrient availability in the region. This process, driven by non-cyanobacteria, could boost algae growth and enhance the ocean's CO2 absorption as ice melts. The findings suggest a need to revise models of Arctic ecological changes amid climate warming.
Melting ice strengthens southern ocean carbon barrier
Freshwater from melting ice and increased precipitation is temporarily trapping carbon dioxide in the deep Southern Ocean, countering predictions of a weakening carbon sink. Scientists from the Alfred Wegener Institute explain this stabilizing effect in a new study. However, intensifying winds may soon reverse this protection, potentially releasing stored CO2 into the atmosphere.
Scientists warn el niño may become more predictable and intense
A new study reveals that the El Niño-Southern Oscillation (ENSO) could intensify and synchronize with other climate patterns due to global warming, potentially leading to more extreme weather by mid-century. Researchers predict a tipping point around 2050 in the tropical Pacific, shifting ENSO from irregular cycles to strong, rhythmic oscillations. This change may heighten risks of rainfall extremes and climate whiplash in regions like Southern California and the Iberian Peninsula.