The IPCC has made it clear that 50% emissions reductions must occur globally by 2030 to remain close to 1.5°C of warming; and prevent cascading and irreversible damage, on a planetary scale, from the impact of greenhouse gas emissions on the cryosphere. As the above papers make clear, overshoot of the 1.5°C limit cannot be considered a viable or safe option, from either an economic or social standpoint. Much of the Earth’s polar and mountain regions – including glaciers, snowpack, permafrost, sea ice, polar oceans and ice sheets – directly react to peaks in temperature and carbon dioxide emissions; and can tip many of these systems into a state of decline, where a later return to lower temperatures and CO2 levels makes little difference: the damage is done, and cannot be reversed on any human timescale. This session features a deeper and more detailed analysis of the NDCs from a number of countries, both 50×30-consistent and those needing strengthened policies to reach the needed emissions reductions needed to keep the 1.5°C goal.
Main presenters include Joeri Rogelj, IPCC AR5 CLA, SR1.5 CLA, and AR6 LA, Director of Research at the Grantham Institute; and Ryan Wilson, Climate and Energy Policy Analyst at Climate Analytics.
Nature Communications, 29 May 2026 The soils of Arctic river deltas store large amounts of…
Scientific Reports, 27 May 2026 Rising global temperatures increase the exposure of communities and infrastructure…
Global Environmental Change, 20 May 2026 In the Qinghai-Tibet Plateau, reducing greenhouse gas emissions could…
Nature Sustainability, 4 May 2026 Sediment records from the Last Inter-Glacial (LIG) period suggest that…
NPJ Climate and Atmospheric Science, 20 May 2026 Human-caused warming has been the primary driver…
Nature Communications, 27 May 2026 Sudden drainage of meltwater lakes through water-filled fractures can locally…