Preprints
Filtering by Subject: Earth Sciences
Greenhouse Gas (GHG) Emissions Poised to Rocket: Modeling the Environmental Impact of LEO Satellite Constellations
Published: 2025-04-11
Subjects: Astrophysics and Astronomy, Earth Sciences, Environmental Sciences, Physics
The proliferation of satellite megaconstellations in low Earth orbit (LEO) represents a significant advancement in global broadband connectivity. However, we urgently need to understand the potential environmental impacts, particularly greenhouse gas (GHG) emissions associated with these constellations. This study addresses a critical gap in modeling current and future GHG emissions by developing [...]
Tidal flexure reveals effective elasticity in grounding zones on the Ross Ice Shelf
Published: 2025-04-11
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
The grounding zones of Antarctic ice shelves are among the continent’s most dynamic regions, where floating ice shelves buttress grounded upstream ice and tidal forcing drives cyclic flexure at the ice-ocean-bed interface. We use ICESat-2 altimetry and airborne ice-penetrating radar to constrain the effective Young’s modulus E* of ice in the flexure zone at three sites on the Ross Ice Shelf. By [...]
Deep source regions for back-arc volcanism in the Patagonian slab window imaged by finite frequency P and SH body wave tomography
Published: 2025-04-09
Subjects: Earth Sciences, Geochemistry, Geology, Geophysics and Seismology, Glaciology, Physical Sciences and Mathematics, Tectonics and Structure, Volcanology
The subduction of the Chile Ridge beneath South America beginning 12-16 Myr ago opened a gap in the subducting slab beneath southern Patagonia, which migrated northward and is located today at 46oS. Geodynamic processes associated with the slab window are poorly understood. Here we apply finite-frequency P and SH body wave tomography to seismic data from several temporary arrays as well as [...]
Forecasting During Volcanic Crises
Published: 2025-04-08
Subjects: Earth Sciences
Forecasting during a volcanic crisis is vital to the preservation of life and mitigation of loss during eruption. Decisions on when, where and how to evacuate, where to send the evacuees, and when they can return, are all informed by forecasts of impending volcanic activity. We review input data and models that underlie short-term forecasts during an eruption crisis, software and tools applied, [...]
dageo: Data Assimilation in Geosciences
Published: 2025-04-08
Subjects: Earth Sciences, Mining Engineering, Oceanography and Atmospheric Sciences and Meteorology, Other Engineering
Data Assimilation combines computer models with real-world measurements to improve estimates and forecasts of dynamical systems such as oceans, atmosphere, and subsurface reservoirs. The Python package dageo is a tool to apply data assimilation in geoscience applications. Currently, it encompasses the Ensemble Smoother with Multiple Data Assimilation (ESMDA) method and provides tools for [...]
Assessing Future Ice Shelf Collapse Vulnerability in the ISMIP6 Ensemble
Published: 2025-04-08
Subjects: Earth Sciences, Glaciology, Physical Sciences and Mathematics
Understanding the possibility of future ice shelf collapses similar to the Larsen B is critical for improving sea-level-rise projections due to the restraint on upstream flow that ice shelves provide. Prior research has provided a criterion for assessing the vulnerability of ice shelf to hydrofracture. We apply these calculations to the model ensemble results from the Ice Sheet Modeling [...]
Google Earth Engine Approach in Monitoring of Mangrove Forest in Govatr Bay, on Oman Sea
Published: 2025-04-05
Subjects: Earth Sciences, Geography
This study investigates geomorphological changes influencing mangrove habitats along Iran's coastline using satellite photos to identify crucial sites for coastal management. Biogeomorphol-ogy helps to solve real-world problems, such as mangrove restoration and coastal management. This study explored the relationship between coastal mangrove habitats and local geomorpholo-gy in Govatr Bay by [...]
A New Fault Model for the 1933 Long Beach Earthquake, Long Beach Area, Southern California
Published: 2025-04-05
Subjects: Earth Sciences, Geology, Geophysics and Seismology, Physical Sciences and Mathematics
Newly identified thrust faults and their corresponding thrust sheets, combined with recent micro-earthquake epicenters, better explain anomalous rupture data observed during the 1933 Long Beach Earthquake than previous models based exclusively on Newport-Inglewood Fault Zone strike-slip faulting. A high-quality 45 km2 3D seismic dataset was recorded in 2017, centered along the Seal Beach [...]
Nuclear Winter Could Sever Urban Water Access Across the Northern Hemisphere
Published: 2025-04-03
Subjects: Civil and Environmental Engineering, Earth Sciences, Risk Analysis, Water Resource Management
The continuous functioning of the underground water supply networks is essential for many aspects of modern civilization. Therefore, it is essential to keep such critical infrastructure safe from disasters. However, existing risk assessment studies often assume relatively stable climate conditions. Abrupt sunlight reduction scenarios, such as those caused by a nuclear war, a large volcanic [...]
Anthropogenic Interference in Aeolian Processes in Kerman Plain, Southeastern Iran
Published: 2025-04-02
Subjects: Earth Sciences, Environmental Sciences, Environmental Studies, Geography
Dry climate, poor vegetation and relatively smooth topography are the most important factors that brought about wind erosion processes prevail in the Kerman plain. Aeolian sediments in the Kerman plain can be divided into active and stabilized sediments. Stabilized sediments show a cross-bedding structure and coarser-grained fluvial sediments are found between layers of aeolian sediments. [...]
Estimate rainfall-runoff using Google Earth Engine in the Minab River Basin
Published: 2025-03-29
Subjects: Earth Sciences, Geography
The Soil Conservation Service Curve Number (SCS-CN) method is a widely accepted and reliable approach for estimating rainfall-runoff relationships within a watershed. This technique is instrumental in hydrological studies, particularly for sustainable water resource management, flood control, and soil conservation. The integration of the SCS-CN method with Google Earth Engine (GEE), a cloud-based [...]
Physical properties of magmas and their evolution during storage, transport, eruption and emplacement
Published: 2025-03-27
Subjects: Earth Sciences
Magma has played an important role in the Earth’s evolution through volcanic and magmatic activity, including the formation of the crust and atmosphere. Magma storage, transport, eruption and emplacement can be quantitatively evaluated based on the understanding and knowledge of magma physical properties. In this chapter, the rheology, permeability and thermodynamic properties of magma are [...]
The Petrology, Geochemistry, and Origin of the East Australian Potassic Suite: Bulk Chemistry and Genesis
Published: 2025-03-27
Subjects: Earth Sciences, Geochemistry, Geology, Volcanology
The Eastern Australian Potassic Suite (EAPS) is an alkaline volcanic province made up of over 20 widely dispersed outcrops that extend almost 700 km, forming the southern portion of the world’s longest continental hotspot track, the Cosgrove track. In contrast to the large basaltic volcanic complexes to the east and north, the EAPS occurs exclusively as mafic potassium–rich occurrences with [...]
Mid-Ocean Ridge Volcanism (Encyclopedia of Volcanoes, 3rd edition, book chapter)
Published: 2025-03-26
Subjects: Earth Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
The vast majority of the Earth’s volcanism takes place in the deep ocean along mid-ocean ridges (MORs), yet because it is difficult to detect and observe, it is also relatively poorly understood. MOR volcanism occurs where tectonic plates spread apart and mainly produces effusive basaltic fissure eruptions where dikes reach the surface. The character and frequency of volcanism varies greatly as a [...]
Eruption triggering
Published: 2025-03-26
Subjects: Earth Sciences
Volcanic systems behave episodically and require mechanisms for magma segregation, instability and ascent. Here, we discuss the processes that promote the ascent of magma to the Earth's surface and prepare the onset of an eruption, thus acting as triggers, as well as the factors that prevent eruption. We describe the various petrological, geochemical and geophysical observations that reveal the [...]