Preprints
There are 7104 Preprints listed.
A scoping review to map research gaps and opportunities relating to heat-related health hazards in countries surrounding Lake Victoria, Africa.
Published: 2026-06-11
Subjects: Climate, Environmental Public Health, Physical and Environmental Geography, Sustainability
Urban populations in sub-Saharan Africa are at rising risks of climate-related health hazards due to global climate change and uncontrolled rapid urbanization. Despite the increasing recognition of these challenges, the extent to which urban climates impact health outcomes in Africa remains poorly understood. East African countries surrounding the Lake Victoria Basin (Kenya, Uganda, Rwanda, [...]
Novel Data-driven High-Frequency Mass Change Models from GRACE orbit residuals
Published: 2026-06-11
Subjects: Climate, Earth Sciences, Fresh Water Studies, Glaciology, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Other Earth Sciences, Other Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
We present a fully data-driven framework for transforming residual K-band range-rate (KBRR) data from GRACE into 5-day mass change models expressed in Equivalent Water Height (EWH). The approach first derives residual range and Line-of-Sight Gravity Differences (LGDs) from monthly post-fit residual range-rates and combines them with 5-day post-fit residuals. A hybrid formulation, merging LGD- and [...]
Historical biogeography of Middle-East mangroves: paleobotanical evidence
Published: 2026-06-11
Subjects: Paleontology
This paper reconstructs the origin, diversification, and decline of Middle East (ME) mangroves from the Late Cretaceous to the present using the MESMA database, a comprehensive compilation of fossil pollen and macrofossil records integrated with paleogeographic, tectonic, climatic and sea-level evidence. To date, global paleobiogeographical and evolutionary syntheses of mangroves have emphasized [...]
High-resolution monthly sectoral water demands for the U.S. over 1980-2100
Published: 2026-06-11
Subjects: Civil Engineering, Hydrology, Water Resource Management
U.S. water demand varies sharply by sector and region as land use, population, weather patterns, and economic activity co-evolve. High-resolution water demand data are required to capture these dynamics and to support integrated energy-water-land modeling and local-to-regional water scarcity assessments. We present a gridded (1/8$^{\circ}$), monthly, multi-sector water demand dataset for the [...]
The influence of speed and scale of carbon dioxide removal on overshoot peak temperature and duration
Published: 2026-06-11
Subjects: Other Earth Sciences, Other Physical Sciences and Mathematics
CO2 emissions are pushing global temperatures higher, with the Paris Agreement temperature target of limiting warming to no more than 1.5°C above the preindustrial average likely to be exceeded within the next two decades. Overshooting this target before reducing global temperature by the end of the century is increasingly viewed as a potential pathway to still meet the Paris Agreement target, [...]
Reactive soil inputs during high-flow events decouple carbon chemistry and CO2 evasion in a granitic headwater stream
Published: 2026-06-11
Subjects: Biogeochemistry, Hydrology
Quantifying CO2 dynamics in low-alkalinity headwater streams is challenging because thermodynamically based evaluations of pCO2 and CO2 fluxes (FCO2) assume coherent DIC-alkalinity-pH coupling. This study examines how hydrologically driven disturbances violate this assumption in a forested, granitic headwater stream using 15 months of calculated pCO2 and FCO2, alongside measurements of pH, [...]
Shifting Patterns of Summer Humid Heatwaves Highlight Growing Threat over South Asia and Middle East–North Africa
Published: 2026-06-11
Subjects: Engineering
Humid heatwaves (HHWs), marked by elevated heat−high moisture compounding, are increasingly concerning for sustainable development in South-Asia (SAS) and the Middle East–North Africa (MENA). We examine the spatiotemporal compounding of HHWs during summer (March−August) across 268 urban and peri-urban sites within the IPCC–reference regions in the SAS and MENA using in-situ observations. We [...]
Future hydrology of a Himalayan basin shaped by elevation dependent shifts in water balance components
Published: 2026-06-10
Subjects: Other Physical Sciences and Mathematics
Mountainous basins in the Himalayas serve as critical ``water towers'' sustaining downstream livelihoods, yet their hydrological response to climate change is complex due to extreme elevation gradients. This study investigates the future hydrology of the Karnali basin (situated in Western Nepal) by disaggregating water balance components along its elevation profile. Using the fully distributed [...]
Metabolic retraction and virulence expansion in a tropical urban river microbiome under dry-season stress
Published: 2026-06-10
Subjects: Microbiology
Anthropogenic pollution and seasonal flow reduction concentrate untreated organic waste in tropical rivers, yet the coupled response of microbial metabolism and virulence gene repertoires remains poorly understood. We applied shotgun metagenomics to the Shitalakshya River (Bangladesh) from early (December 2024) to peak (February 2025) dry season. Dissolved oxygen fell to near-hypoxic levels, [...]
Satellite-Based Clustering of Pre-Monsoon Wildfires and Variability of Tropospheric NO₂ and CO in Nepal
Published: 2026-06-10
Subjects: Environmental Engineering
Nepal's pre-monsoon season transforms the country's southern lowlands into one of South Asia's most active wildfire landscapes. However, spatially explicit assessments of wildfire dynamics and trace gas variability at high temporal resolution remain limited. This study uses a satellite-based methodology to quantify wildfire activity and its atmospheric impacts across Nepal during 2021–2024. [...]
Seeing Cities in Depth: Subsurface Urban Expansion and the Case for Volumetric Monitoring and Accountability
Published: 2026-06-10
Subjects: Physical Sciences and Mathematics, Social and Behavioral Sciences
Urban science can measure surface and aboveground change with increasing precision. Satellites, building-footprint datasets, and emerging three-dimensional products now track urban land, building height, and built volume. Yet these tools still struggle to capture urbanization below ground. This Perspective defines subsurface urban expansion as the extension of urbanization below the local ground [...]
A Rotating Air-Ring Model for Atmospheric Vortices and a Peripheral Drag Concept for Tornado Mitigation
Published: 2026-06-10
Subjects: Education, Engineering, Physical Sciences and Mathematics
This study introduces Latent Angular Momentum (LAM) as a heuristic parameter for understanding the intensification of rotating atmospheric vortices. Using a simplified air-ring model based on the conservation of angular momentum, we derive an analytical expression for tangential wind speed as a function of radial contraction and latitude. Model predictions yield physically plausible initial radii [...]
Carbon Dioxide Removal Supply Curves: A Multi-Model Assessment
Published: 2026-06-10
Subjects: Other Environmental Sciences
Carbon dioxide removal (CDR) is widely recognised as essential for pathways consistent with the Paris Climate Agreement. Yet the cost-dependent potential of CDR options, given resource competition, remains uncertain. Here we present CDR-supply curves assessing a range of CDR options across carbon price levels using five Integrated Assessment Models (IAMs) for 2035, 2050 and 2100. At 400 (200) $ [...]
Dress Rehearsal: 2023 El Niño Anticipatory Action Somalia, in the Shadow of 1997
Published: 2026-06-10
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Environmental Studies, Human Geography, Meteorology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Other Geography, Physical and Environmental Geography
In 2023 Somalia saw the largest-ever scale of anticipatory action (AA) linked to a seasonal forecast. $24m was spent on preparedness and early response, based on forecasted flooding driven by El Niño and a positiveIn 2023 Somalia saw the largest-ever scale of anticipatory action (AA) linked to a seasonal forecast. $24m was spent on preparedness and early response, based on forecasted flooding [...]
Mangrove Loss and Growing Coastal Flood Exposure in East Malaysia: A Multi-Decadal Analysis with Sea Level Rise Projections
Published: 2026-06-10
Subjects: Earth Sciences, Environmental Sciences, Environmental Studies, Geographic Information Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical and Environmental Geography, Remote Sensing
Mangrove forests provide critical coastal flood protection, yet their ongoing loss in combination with sea level rise creates a compounding exposure dynamic that remains poorly quantified at sub-national scale across Southeast Asia. This study presents the first systematic, multi-decadal analysis of mangrove loss and coastal flood exposure change for the 10 km coastal buffer of East Malaysia [...]