COP29 Video of the Week: Polar Oceans – Triple Threat of Acidification, Warming and Freshening

The Arctic and Southern Oceans are crucial components of the global climate system. Their unique ecosystems are under serious threat from warming, acidification, freshening and ice loss. Polar oceans are already experiencing changes in chemistry, and continued warming is leading to population range shifts, changes in food webs, ecosystems, fisheries, and climate regulation. Speakers highlighted […]

Groundbreaking Study Consolidates Two Decades of Glacier Observations

Nature, 19 February 2025 A comprehensive analysis from the Glacier Mass Balance Intercomparison Exercise, or GlaMBIE, reveals global glaciers are losing ice at an alarming rate, averaging 270 billion tonnes annually from 2000 to 2023, with a significant acceleration in recent years. This mass loss, surpassing both Greenland and Antarctic ice sheet contributions, made glaciers […]

Rising Temperatures Expected to Weaken Major Polar-driven Ocean Circulation Systems

Nature and Environmental Research Letters, 26 February and 3 March 2025 Two recent studies refine predictions of North Atlantic and Antarctic ocean circulation behavior this century, highlighting the interconnectedness of the Earth’s polar oceans and climate system. Together, the studies emphasize the urgent need for mitigation of emissions, to avoid major disruption to the delicate […]

Regime Shift in Antarctic Sea Ice Levels

Nature Communications Earth and Environment, 21 February 2025 A new study reveals a significant structural shift in Antarctic sea ice patterns over the past decade. While Antarctic sea ice showed a long-term slightly increasing trend until 2016, patterns changed in 2017 with multiple consecutive summers displaying record-low amounts of sea ice. By reconstructing sea ice […]

到 2100 年,海平面上升可能威胁到北极一半的社区

AGU 地球的未来,2024 年 12 月 16 日。这项跨学科的海岸威胁风险评估整合了北极地区的海蚀、海平面上升和永久冻土融化数据,绘制出了第一幅全面展示气候变化对沿海社区和基础设施脆弱性的地图。结果显示,到 2100 年,% 的沿海居民点将受到影响……

COP29 本周视频:缓慢显现,影响巨大——永久冻土对全球 1.5°C 目标意味着什么

冻土在计算当前和未来碳排放量时起着至关重要的作用。高级研究人员解释了永久冻土融化的近期趋势,并概述了在多种排放情景(包括我们目前的排放轨迹)下,永久冻土融化未来产生的二氧化碳和甲烷排放量。他们深入探讨了对这些排放量进行监测、测量和核算的现状。[…]

北极“最后一片冰区”可能比先前预测的更早消失

通信地球与环境,2025年1月23日 北极的“最后冰区”(LIA)——该区域位于格陵兰岛北部和加拿大北极群岛,长期以来被认为是常年海冰能够存活时间最长的地区,为依赖冰的物种提供了一个潜在的避难所——可能会在中央北极[…]后不到十年内消失。

本周COP29视频:消失的海冰——它对我们的海洋和生态系统的意义

海冰是北极和南极地区独特、基础且脆弱的栖息地。气温升高导致海冰厚度和范围减小,破坏了脆弱的海洋环境平衡,并带来全球性后果。科学和政策专家讨论了北极和南极海冰的当前和未来变化、它们对极地海洋生态系统的影响以及目前的准备状况 […]