Open access copy available
Global Carbon Budget 2025Background“Global Carbon Budget 2025” extends the living dataset on anthropogenic carbon dioxide (CO2) emissions and their redistribution among atmosphere, ocean, and land, updating trends through 2024, and providing preliminary 2025 estimates. Atmospheric CO2 has risen from about 278 ppm in 1750 to 422.8 ± 0.1 ppm in 2024, with recent growth amplified by the 2023–2024 El Niño event. This paper highlights the continued dominance of fossil fuel emissions, persistent sources of land-use change, and climate-driven modulation of land and ocean sinks within the broader carbon-climate system. Open access copy available |
Global Carbon Budget 2024Background“Global Carbon Budget 2024” assesses how anthropogenic carbon dioxide (CO2) emissions disrupt the global carbon cycle relative to pre-industrial conditions, when atmospheric CO2 was about 278 ppm in 1750. The study focuses on emissions from fossil fuels and land-use change and how these are partitioned between the atmosphere, ocean, and terrestrial biosphere. Recent changes, in the context of long-term trends since 1958, emphasize the role of deforestation, fossil fuel combustion, and climate variability, such as El Niño, in shaping CO2 fluxes. Open access copy available |
Global Significance of Mangrove Blue Carbon in Climate Change MitigationBackgroundMangrove forests sequester proportionately greater amounts of carbon than most terrestrial environments. However, natural greenhouse gas (GHG) fluxes from these ecosystems and the carbon released when they are degraded counteract their carbon sequestration potential. Therefore, it is necessary to examine carbon stocks, rates of carbon sequestration, and carbon losses from these environments to clarify the global and regional potential of mangrove forests to mitigate climate change. Open access copy available |
Global potential and limits of mangrove blue carbon for climate change mitigationBackgroundDespite national and international policy organizations’ interest in blue carbon financing for mangrove conservation, there is a lack of investment in payments for ecosystem services from the commercial sector. To encourage future investments and scale up blue carbon projects, it is necessary to address knowledge gaps on the financial return on investment for blue carbon projects. Open access copy available |
Decreasing landscape carbon storage in western US forests with 2 °C of warmingBackgroundThis study investigates how a 2°C increase in global mean temperature above pre-industrial levels could alter above-ground carbon storage in forests across the western United States, a region already experiencing climate-driven tree mortality, reduced regeneration, and more frequent fire and insect outbreaks. Forest carbon density is treated as a “carbon carrying capacity” controlled by climate and disturbance regimes, and there is concern that warming and drying will shift many areas towards lower carbon forest or non-forest states, with implications for climate mitigation and carbon offset projects. Open access copy available |
Don’t judge species on their originsBackgroundThis commentary suggests that the long-standing “native versus non-native species” debate has created a widespread bias in conservation as it encourages the idea that introduced species are inherently harmful, despite limited quantitative evidence supporting broad claims of catastrophic biodiversity loss. As global changes (such as climate change, nitrogen eutrophication, increased urbanization, and other land-use changes) cause ecosystems to be unable to restore to their historical states, categorizing species based on their origin increasingly mismatches ecological reality, influencing policy, funding, and management priorities. Open access copy available |
Elevation, aspect, and climate shape blue pine (Pinus wallichiana) biomass and carbon dynamics in the Bhutanese HimalayasBackgroundForests cover over two-thirds of Bhutan and are constitutionally protected, enabling national carbon neutrality. Yet, climate change, increasing temperatures, variable precipitation, and heightened wildfire risk threaten carbon storage capacity and species distributions. Blue pine is a fast-growing, socio-economically important species dominating inner dry valleys between roughly 2200–3000 m, making it an ideal model to understand how elevation and slope aspect regulate biomass accumulation and carbon sequestration under changing climate conditions. Open access copy available |
Refining the Global Estimate of Mangrove Carbon Burial Rates Using Sedimentary and Geomorphic SettingsBackgroundPrevious research has focused on calculating accurate estimates of global mangrove carbon stock, while lacking studies examining global patterns of organic carbon (OC) burial. Mangrove forests are naturally highly variable, existing in different sedimentary (i.e., terrigenous- or carbonate-dominant) and geomorphic (i.e., delta, estuary, lagoon, open coast) environments. In addition, different anthropogenic factors affect their structure. Therefore, it is necessary to examine how the spatial variability of mangrove sedimentary and geomorphic settings affects global OC burial estimates. Open access copy available |
Factors influencing organic carbon accumulation in mangrove ecosystemsBackgroundMangrove forest sediments can store a significant amount of organic carbon (900 Mg ha-1). Environmental and anthropogenic impacts, like storms or deforestation, can increase or decrease carbon accumulation rates within mangrove sediments and ecosystems. Therefore, it is important to understand how these impacts affect blue carbon ecosystems’ storage capacity. Open access copy available |
Global, multi-scale standing deadwood segmentation in centimeter-scale aerial imagesBackgroundThis article examines how increasing tree mortality worldwide creates an urgent need for efficient approaches to map standing deadwood, including both fully dead crowns and partial canopy dieback, as a basis for monitoring forest dieback and informing management across biomes. Existing remote-sensing methods using RGB aerial imagery often work only for specific regions, resolutions, or forest types, limiting their transferability and value for global applications. Open access copy available |
