Climate change critical transition indicators

🌍 The Arctic's Alarming Transition: From Carbon Sink to Carbon Source 🌍 According to NOAA: National Oceanic & Atmospheric Administration’s latest Arctic Report Card, the tundra is now emitting more #carbondioxide and #methane than it absorbs—a profound shift with global #climate implications. In 2024, permafrost temperatures reached their highest levels on record at nearly half of Alaska’s long-term monitoring stations. #Wildfire emissions north of the Arctic Circle ranked second-highest in history, amplifying #carbon and methane releases. The tundra region has transitioned from a carbon sink to a source, while the boreal forest region remains a vital carbon sink. 🔥 Why This Matters: Thawing permafrost and intensifying wildfires, driven by warming temperatures, are fueling microbial activity and releasing ancient carbon deposits. These emissions are no longer offset by regrowing vegetation, as frequent and severe wildfires and below-ground carbon combustion prevent re-sequestration. 📏 Tracking the Change: Initiatives like the World Meteorological Organization Global #GreenhouseGas Watch #G3W are essential to track and understand these emissions in real time, providing critical data to inform climate action and assess the effectiveness of global mitigation efforts. 📢 What Can Be Done? This sobering reality demands global action: Rapid emission reductions to slow warming. Investment in Arctic research to better predict and mitigate these changes. Support for communities on the front lines of climate change impacts. The Arctic is a climate bellwether. Its transformation reflects the urgency of addressing global warming—not tomorrow, but today. https://lnkd.in/d2GeiTYS

New paper – Critical intervention points for European adaptation to cascading climate change impacts Abstract “In an interconnected world, #climatechange impacts can cascade across sectors and regions, creating #systemicrisks. Here we analyse cascading climate change impacts on the EU, originating from outside the region, and identify critical intervention points for #adaptation. Using network analysis, we integrate stakeholder-co-produced impact chains with quantitative data for 102 countries across #foreignpolicy, human security, #trade and #finance. Our archetypal impact cascade model reveals critical intervention points related to water, livelihoods, agriculture, infrastructure and economy, and violent conflict. Livelihood instability, with violence exacerbating conditions in conflict-prone regions, tends to amplify risks of cascading impacts emerging from low-income countries. High-income countries can trigger cascading impacts through, for example, reduced crop exports. Our findings highlight the importance of policy coherence in addressing interconnected vulnerabilities rather than isolated risks. Thus, agricultural intensification without integrated water management may exacerbate scarcity, whereas safeguarding livelihoods alleviates cascading risks related to forced migration, violent conflict and instability.” Read more below. Auer, C., Reyer, C.P.O., Adamczak, W. et al. Critical intervention points for European adaptation to cascading climate change impacts. Nat. Clim. Chang. 15, 1226–1233 (2025). https://lnkd.in/eGg9vitS

I am very excited to share two major new resources released by our Office of Climate Change and Health Equity today! The first is a new Climate Resilience for Health Care (CR4HC) toolkit that substantially updates the previous HHS toolkit from 2014 and provides specific assessment and resilience measures for multiple climate-related hazards like flooding, wildfires and heat. It is designed to align closely with the ASPR Risk Identification and Site Criticality Assessment Tool. Huge shoutout to the talented and dedicated OCCHE staff who created this new toolkit! https://lnkd.in/evDvCJ7E The second is a new Climate Change and Health Equity Indicators webpage. This is the first federal climate and health indicators webpage to explicitly link indicators of exposure, health impact, vulnerability, and adaptation measures in one integrated system, as well as the first to allow scaling of indicators to the state and county level and to include indicators of health sector sustainability and resilience. Huge shoutout to the talented and dedicated OCCHE staff who created this indicators webpage! https://lnkd.in/eFEtd-aC All please feel free to share, distribute and download these materials for your use!

Indicators of Global #ClimateChange 2023: annual update of key indicators of the state of the climate system and #human #influence Abstract: Intergovernmental Panel on Climate Change (IPCC) assessments are the trusted source of #scientific #evidence for climate negotiations taking place under the United Nations Framework Convention on Climate Change (UNFCCC). Evidence-based decision-making needs to be informed by up-to-date and timely #information on key #indicators of the state of the climate system and of the human influence on the global climate system. However, successive IPCC reports are published at intervals of 5–10 years, creating potential for an information gap between report cycles We follow methods as close as possible to those used in the IPCC Sixth Assessment Report (AR6) Working Group One (WGI) report. We compile monitoring datasets to produce estimates for key climate indicators related to forcing of the climate system: emissions of greenhouse gases and short-lived climate forcers, greenhouse gas concentrations, radiative forcing, the Earth's energy imbalance, surface temperature changes, warming attributed to human activities, the remaining #carbon budget, and estimates of global #temperature extremes. The purpose of this effort, grounded in an open-data, open-science approach, is to make annually updated reliable global climate indicators available in the public domain As they are traceable to IPCC report methods, they can be trusted by all parties involved in UNFCCC negotiations and help convey wider understanding of the latest knowledge of the climate system and its direction of travel The indicators show that, for the 2014–2023 decade average, observed warming was 1.19 [1.06 to 1.30] °C, of which 1.19 [1.0 to 1.4] °C was human-induced. For the single-year average, human-induced warming reached 1.31 [1.1 to 1.7] °C in 2023 relative to 1850–1900. The best estimate is below the 2023-observed warming record of 1.43 [1.32 to 1.53] °C, indicating a substantial contribution of internal variability in the 2023 record. Human-induced #warming has been increasing at a rate that is unprecedented in the instrumental record, reaching 0.26 [0.2–0.4] °C per decade over 2014–2023 This high rate of warming is caused by a combination of net greenhouse gas emissions being at a persistent high of 53±5.4 Gt CO2e yr−1 over the last decade, as well as reductions in the strength of aerosol cooling. Despite this, there is evidence that the rate of increase in CO2 emissions over the last decade has slowed compared to the 2000s, and depending on societal choices, a continued series of these annual updates over the critical 2020s decade could track a change of direction for some of the indicators presented here Please read the full article!

45 key climate indicators assessed 45 key climate indicators off-track This is the alarming finding from the latest State of Climate Action report From World Resources Institute, ClimateWorks Foundation, Bezos Earth Fund, Climate Analytics, and other partners. Out of 45 key indicators across sectors from energy to land use, none are on track to meet 2030 targets aligned with 1.5°C. -6 indicators show “promising” progress. -29 are well below the required pace. -5 are actually moving in the wrong direction. Some bright spots remind us what alignment can achieve: ☀️ Solar is now the fastest-growing power source in history. 💰 Private climate finance has surged, moving from “well off track” to “off track.” ⚗️ Emerging technologies like green hydrogen are seeing encouraging gains. But these positives are overshadowed by the slowdowns and setbacks: 🚗 Electric vehicle growth has decelerated as the only previously “on track” indicator is now off track. 🌲 Deforestation and coal phase-outs remain stubbornly stagnant. 🔥 Each year of delay means the slope to 2030 becomes even steeper. To realign with 1.5°C, progress must accelerate dramatically: -Deforestation decline: 9× faster -Gas phase-out: 7× faster -Climate finance growth: 4× faster My takeaway: We are well past the point of incremental progress. We need systems change to decarbonize and keep warming within safe limits. Reports are already saying 1.5 C may be going up in smoke. Exponential shifts can feel extreme, but so is the situation. We must be prepared for the mounting physical and transition risks in this volatile world. Check out the full report here: https://lnkd.in/eyrVv53t #climate #climateaction #decarbonization #netzero #cop30