Preprints
There are 6179 Preprints listed.
Natural Origins of 3I/ATLAS: Why 3I/ATLAS is Not an Alien Probe
Published: 2025-08-04
Subjects: Physical Sciences and Mathematics
A number of scientists have talked about the interstellar object 3I/ATLAS (C/2023 A3) since it was found in 2025. This is mostly because Dr. Avi Loeb thinks the object could be an alien probe because of its size, path, and chemical ambiguity. This work looks closely at Loeb's claims and gives a fresh astrogeological reason for them: Another group of scientists found that the lithified clastic [...]
Bridging Ancestral Knowledge and Ecosystem Science for Coastal Restoration in Latin America
Published: 2025-08-03
Subjects: Biodiversity, Biology, Cell and Developmental Biology, Ecology and Evolutionary Biology, Forest Sciences, Life Sciences, Marine Biology, Microbiology, Research Methods in Life Sciences, Systems Biology
Peer-review status: This manuscript has not been peer-reviewed. It is a preprint submitted for public dissemination and open feedback. This study documents the CALISUR methodology, a community-based mangrove restoration model rooted in ancestral ecological knowledge and applied across six intervention sites in the Gulf of Guayaquil. The methodology integrates scientific and traditional practices [...]
Artificial Intelligence in Earth Science: A GeoAI Perspective
Published: 2025-08-03
Subjects: Artificial Intelligence and Robotics, Computer Sciences, Earth Sciences, Engineering, Environmental Sciences, Physical Sciences and Mathematics
GeoAI, or geospatial artificial intelligence, has transformative potential for Earth science by integrating geospatial data with artificial intelligence to enhance environmental monitoring, predictive modeling, and decision-making. This commentary, based on the Greg Leptoukh Lecture at AGU 2024, explores the evolving role of GeoAI in addressing pressing challenges—from environmental change in the [...]
PhyX - Predicting Phytoplankton Community Composition from Satellite Ocean Color
Published: 2025-08-02
Subjects: Marine Biology
The way in which phytoplankton communities are structured - often referred to as phytoplankton community composition (PCC) - exerts fundamental control on ocean biogeochemical cycling, climate regulation, and marine ecosystem dynamics. Accurate quantification of these groups from satellite ocean color data remains challenging due to spectral similarities among phytoplankton types and the [...]
Post-Wildfire Indoor Pollution in WUI Areas Following the 2025 Los Angeles Fires — Part I: Establishing Baseline Contaminant Levels Prior to Home Reoccupation
Published: 2025-08-02
Subjects: Engineering, Medicine and Health Sciences
Wildland-Urban Interface (WUI) fires pose unique environmental pollution challenges due to the combustion of both natural vegetation and synthetic building materials. Following the 2025 Palisades and Eaton wildfires in Los Angeles, we conducted a field study to characterize indoor air quality and surface contamination in 19 homes before re-occupancy. Indoor PM₂.₅ and PM₁₀ concentrations averaged [...]
Mantle-driven, climatically modulated landscape evolution in Southern Patagonia
Published: 2025-08-02
Subjects: Earth Sciences
We explore the relative importance of tectonic, geodynamic and surface processes in driving landscape evolution in Argentine Patagonia using 64 new 10Be exposure ages of fluvial terraces preserved over >250 km along the Shehuén and Santa Cruz rivers (50ºS). Terrace ages range from 33 ka to 1.5 Ma, and coincide with Patagonian glaciations. We demonstrate that landscapes can respond directly to [...]
Robust networks of rainfall extremes emerge despite fragile ocean monsoon causality under Internal variability
Published: 2025-08-01
Subjects: Atmospheric Sciences, Climate, Meteorology, Oceanography
Climate ready multi sectoral risk management relies on understanding not only where extreme rainfall occurs but also how such events synchronize across regions and interact with internal climate modes. The stability of synchronized rainfall networks and remote climate forcings under internal climate variability (ICV), especially when aggregating ensemble simulations for statistical robustness, [...]
Spaceborne mineral mapping reduces dust’s shortwave radiative impact uncertainty
Published: 2025-08-01
Subjects: Physical Sciences and Mathematics
Mineral dust impacts climate through complex interactions with radiation, which remain poorly quantified due to uncertainties in the amount of light-absorbing iron oxides within dust particles. NASA’s EMIT imaging spectrometer, now delivering high-resolution soil mineralogy from the International Space Station, provides the first observational basis to address this gap at a global scale. Using [...]
Real-time GIS for Programming and Geocomputation
Published: 2025-08-01
Subjects: Engineering
Streaming data generated continuously from sensor networks, mobile devices, social media platforms and other edge devices have posed significant challenges to existing computing platforms for achieving both high throughput and low latency data processing in addition to scalable computing. This paper introduces a real-time computing and programming platform for time-critical GIS (Geographic [...]
Slow Slip Events in Mexico: A Historical Perspective
Published: 2025-08-01
Subjects: Physical Sciences and Mathematics
This paper introduces a historical catalogue of slow slip events (SSE) for the Mexican subduction zone. The catalogue incorporates all 25 SSEs recorded since they were discovered in 1997. The inversion of GPS data for ten SSEs in Guerrero and five in Oaxaca reveals a clear slow slip segmentation along the Middle America Trench, with slip maxima between 30 and 40 km depth in both regions. SSEs in [...]
Classifying Climate Benefits and Addressing Trade-offs of Timber Use in Buildings for Voluntary Carbon Markets and the EU Carbon Removal Certification Framework
Published: 2025-07-31
Subjects: Environmental Sciences, Materials Science and Engineering, Other Engineering, Planetary Sciences, Statistics and Probability
Timber use in construction is increasingly promoted as a climate mitigation option due to its potential for carbon storage and material substitution. Current classifications often conflate storage with carbon removal, risking misalignment with voluntary carbon market integrity frameworks and the EU Carbon Removal Certification Framework. This paper evaluates the scientific and methodological [...]
The 1908 Tunguska event and electromagnetic phenomena
Published: 2025-07-31
Subjects: Education, Physical Sciences and Mathematics
This paper is a continuation of a series of works, devoted to various aspects of the 1908 Tunguska event. In this paper its author would like to draw attention to the arguments about the manifestations of electromagnetic phenomena in the 1908 Tunguska event. A review is provided of some data supporting the idea about the manifestation of electromagnetic phenomena. Although there is no direct [...]
“It is a sham process with participation.” Ten forms of citizen participation for sustainable development in the Norwegian Arctic
Published: 2025-07-31
Subjects: Environmental Studies
This study examined practices of citizen participation at the municipal level and the role of sustainability in this context in various municipalities in Nordland, Finnmark, and Troms in the Norwegian Arctic. Analysis of transcripts from 75 interviews identified 10 forms of citizen participation in planning processes and meetings aimed at discussing local challenges and possible solutions. Only [...]
The Indispensable Role of Weather Data in Consumer Spending Prediction: A Robust Machine Learning Assessment
Published: 2025-07-31
Subjects: Climate, Environmental Indicators and Impact Assessment, Environmental Monitoring, Meteorology
Accurate forecasting of daily consumer spending is crucial for strategic decision-making in the retail sector, yet the dynamic influence of weather is often underestimated or insufficiently integrated into predictive models. This study presents a comprehensive evaluation of incorporating both historical and 7-day weather forecast data on predicting consumer spending amounts across three diverse [...]
Regionally divergent drivers behind transgressions of the freshwater change planetary boundary
Published: 2025-07-31
Subjects: Hydrology, Physical Sciences and Mathematics
Human-driven freshwater change contributes to elevated Earth system risks. Here, we advance the understanding of drivers behind the transgression of the planetary boundary for freshwater change (PB-FW), based on historical (1901–2019) streamflow (blue water) and soil moisture (green water) simulations from a large ensemble of global hydrological models. Since the former estimate ending in 2005, [...]