Preprints
There are 6293 Preprints listed.
ClimActor 2.0: A spatialized database of subnational climate pledges and emissions data
Published: 2025-09-30
Subjects: Environmental Studies
ClimActor 2.0 is an open, spatialized database that compiles climate targets, action plans, and self-reported emission inventories from subnational governments, including cities, municipalities, states and regions, worldwide. The dataset provides standardized administrative boundaries for each entity, enabling direct linkage to geospatial data such as population, GDP, land cover, and other [...]
The African Transport Systems Database: an open geospatial database of multi-modal connected networks
Published: 2025-09-29
Subjects: Civil and Environmental Engineering, Engineering, Transportation Engineering
We present the first comprehensive geolocated multi-modal transport database for the whole continent of Africa, the African Transport Systems Database (AfTS-Db), including road, rail, aviation, maritime and inland waterway networks. To do so, we created and standardized asset and network data across all transport modes, including inter-modal connections, attributes of road and rail corridors and [...]
Machine learning predictions of summertime warming jumps on decadal timescales
Published: 2025-09-28
Subjects: Climate
Extreme events are responsible for some of the most severe impacts of climate change, but regional extreme event prediction remains a challenge as the events contain a large amount of stochasticity. Here we demonstrate an approach for predicting future summertime temperature extremes on decadal timescales by first identifying an abrupt jump in average summertime temperature as a covariate of [...]
Integrating Environmental Variables and Machine Learning for Wildfire Susceptibility Prediction in Portugal
Published: 2025-09-28
Subjects: Life Sciences, Physical Sciences and Mathematics
Wildfires constitute a significant ecological disturbance within Mediterranean ecosystems, exerting profound effects on forest dynamics, biodiversity, and land management practices. The development of precise susceptibility mapping is essential to inform prevention strategies, optimize resource allocation, and promote sustainable forest management by increasing fire pressure. This study employed [...]
Restoration of forestry-drained oligotrophic peatlands can bring climate change mitigation within a few decades
Published: 2025-09-28
Subjects: Life Sciences
Introduction: Assessment of climate mitigation of peatland restoration is urgently needed, but data on greenhouse gas (GHG) fluxes from restored forestry-drained peatlands (FDP) is sparse. Using surrogate values from pristine peatlands, some studies have indicated long-lasting warming effect of restoration especially of nutrient-poor FDPs, while studies considering realized conditions and data [...]
Detection of Point-Source Methane Enhancements from MethaneSAT Observations with Target-Driven Spectral Matching Algorithm
Published: 2025-09-28
Subjects: Atmospheric Sciences, Environmental Sciences
Methane is a potent greenhouse gas with large emissions often arising from localized point sources in industrial facilities. MethaneSAT, launched in 2024, observes the 1598-1683 nm band with sub-nanometer resolution and 100 m × 400 m footprints, enabling sensitive detection of methane absorption. We introduce an updated matched filter (BCMF) with covariance exclusion and a statistical correction [...]
Water recharge, hydrological processes, and surface water quality through Nature-Based Solutions (NBS) in streams of the Ilaló volcano.
Published: 2025-09-27
Subjects: Civil and Environmental Engineering
In the Ilaló volcano, water supplied the Valle de los Chillos and Tumbaco to the south of the capital of Ecuador. Mamatena and Kanguil Uku are two water sources, and for approximately 40 years, there has been a pipeline for domestic and irrigation use. The main objectives were to identify the water recharge areas, characterize the groundwater flow lines, and determine the percentage of losses due [...]
A Sensitivity Analysis Approach to Identifying Drivers of Streamflow Hysteresis
Published: 2025-09-27
Subjects: Civil and Environmental Engineering, Engineering, Hydraulic Engineering
We study the critical interplay between streamflow hysteresis and local hydro-morphologic conditions. Hysteresis strength, which can lead to over 60% errors in discharge estimation with widely accepted monitoring methods, is primarily influenced by local characteristics such as bed slope, roughness, and event wave intensity. Our study used a 1D numerical model to highlight the hysteresis response [...]
Do Coupled Megathrusts Rupture?
Published: 2025-09-27
Subjects: Physical Sciences and Mathematics
Megathrust earthquakes are among the most destructive and least predictable natural hazards. Kinematic geodetic coupling models, which identify regions of the plate interface where interseismic strain accumulates, are essential for seismic and tsunami hazard assessment. Yet their reliability remains debated: geodetic records are short, offshore resolution remains poor, and earthquake ruptures may [...]
Surface tension estimation of bubble nuclei in magma using spinodal pressure and nonclassical nucleation theory
Published: 2025-09-24
Subjects: Physical Sciences and Mathematics
Efforts to estimate the magma decompression rate from the vesicular texture of volcanic products have progressed through the development of theoretical models and laboratory experiments. The theoretical model is based on nucleation theory, with the surface tension between the melt and bubble nucleus being the parameter that most strongly governs nucleation. Since direct measurement of surface [...]
Insights from the Unseen - Occlusion in Forest Laser Scanning
Published: 2025-09-23
Subjects: Environmental Monitoring, Forest Sciences, Other Forestry and Forest Sciences
Laser scanning is a powerful tool for assessing the structural complexity of forests and its role in ecosystem processes and functioning. Laser scans are however highly affected by occlusion (where objects block laser pulses), resulting in data gaps within the 3D representation of the forest. Although occlusion is a well-known and frequently discussed challenge for estimating forest structural [...]
SWOT Satellite Altimetry Observations and Source Model for the Tsunami from the 2025 M8.8 Kamchatka Earthquake
Published: 2025-09-23
Subjects: Physical Sciences and Mathematics
On 29 July 2025 a Mw 8.8 earthquake struck off Kamchatka, Russia generating a Pacific-wide tsunami and marking the largest earthquake since the launch of the SWOT satellite in 2022. We analyze tsunami observations from SWOT together with three nearby DART buoys to resolve the source of the event. SWOT provided the first high-resolution spaceborne track of a great subduction-zone tsunami, [...]
Planetary analog sites in the Indian subcontinent and the Indian Ocean: Underexplored environments suited for astrobiological and space research
Published: 2025-09-23
Subjects: Earth Sciences, Environmental Microbiology and Microbial Ecology Life Sciences, Other Planetary Sciences
A central objective of astrobiology is to evaluate the habitability of other planetary bodies, and given the high cost and logistical complexity of space missions, preliminary investigations of planetary analog sites are a critical step in supporting and de-risking future exploration efforts. Planetary analog sites are extreme environments on Earth that exhibit one or more environmental, [...]
Satellite-Derived Approaches for Coal Mine Methane Estimation: A Re-view
Published: 2025-09-23
Subjects: Earth Sciences, Environmental Sciences
Methane emissions from coal mines, especially surface operations, are spatially diffuse, presenting signif-icant challenges for accurate quantification. Satellites such as TROPOMI, GHGSat, PRISMA, Gaofen-5, and GOSAT have been extensively used for detecting methane emissions at various scales, from individual point sources to regional and global assessments. Despite various advancements, methane [...]
Paleoecology indicates wave climate as key factor in coral reef development
Published: 2025-09-23
Subjects: Climate, Earth Sciences, Ecology and Evolutionary Biology, Environmental Sciences, Geology, Geomorphology, Oceanography and Atmospheric Sciences and Meteorology, Stratigraphy
The Last Interglacial (∼125,000 years ago) experienced global temperatures warmer than today, making it a natural analog for future climate scenarios. Contemporary coral reefs preserve ecological signals that offer valuable insights into past climate dynamics. Here, we examine the fossil reefs of Aruba, Bonaire, and Curaçao to reconstruct wind and wave conditions during this period. While modern [...]