新たな研究によると、アマゾンにおける森林破壊がこのまま続けば、地球温暖化がわずか1.5℃進むだけでも広範囲な熱帯雨林の枯死が引き起こされる可能性がある。研究者らは、森林消失率が22%に達した場合、早ければ2031年にもその臨界点が訪れる可能性があると警告している。
ポツダム気候影響研究所の科学者らは、2050年までの気温上昇と森林破壊の複合的な影響をモデル化した。その結果、森林破壊を考慮しなかった従来の予測と比較して、森林破壊を含めた場合、アマゾンが枯死する臨界温度が約2℃低下することが示された。
A new analysis in Geophysical Research Letters shows Earth warming at ~0.36°C per decade since 2014—about double the prior rate of 0.18°C per decade—with 98% confidence after accounting for natural factors. Led by Stefan Rahmstorf, the study warns the Paris Agreement's 1.5°C limit could be breached by 2028, amid debates over short-term trends and data uncertainties.
AIによるレポート
Building on recent studies like Stefan Rahmstorf et al.'s analysis showing a doubling of Earth's warming rate to ~0.36°C per decade since 2014, scientists disagree on whether reductions in aerosol pollution or natural fluctuations are driving the speedup. Nearly all agree warming has accelerated, but views differ on causes, rate, and future trajectory—with implications for climate sensitivity and adaptation.
A new study warns of an interdisciplinary blind spot that could force 132 million people to flee rising sea levels, which could rise by up to 150 centimeters. Swedish oceanographer Ola Kalén at SMHI describes the acceleration of sea level rise since the 1960s as shocking.
AIによるレポート
Atmospheric methane concentrations rose at an unprecedented rate in the early 2020s, driven by a weakened natural removal process and increased emissions from wetter landscapes. Scientists attribute much of the spike to a drop in hydroxyl radicals during 2020-2021, combined with climate-driven boosts from wetlands and agriculture. The findings underscore the interplay between atmospheric chemistry and weather patterns in global greenhouse gas trends.