Preprints
There are 5978 Preprints listed.
Grain size evolution in mantle convection models promotes continuous rather than episodic tectonics
Published: 2025-01-06
Subjects: Earth Sciences, Physical Sciences and Mathematics, Planetary Sciences
A long-persistent caveat of geodynamic models with Earth-like tectonic behavior is the need of an ‘ad hoc’ yield stress lower than any laboratory-inferred rock strength. Grain size reduction due to dynamic recrystallization provides local weak zones in the lithosphere thereby promoting lithospheric breakdown and continuous mobile-lid tectonics. Grain growth should instead (re-)strengthen the [...]
Rotational Flow Dominates Abrupt Seasonal Change in Zonally Asymmetric Tropical Meridional Circulation
Published: 2025-01-06
Subjects: Physical Sciences and Mathematics
By defining a pseudo meridional overturning streamfunction (Ψpseudo) at any zonal sector and defining a new vector-type, dual-component index (Abrupt Seasonal Change Index, ASCI), we diagnose zonally asymmetric abrupt seasonal change (ASC) of tropical meridional circulation. Ψpseudo converges to traditional, meridional overturning streamfunction (Ψm) after being averaged over a zonal circle [...]
2027: Waking the AKU-- A Cosmic Hyperobject View of the Ancient Giant Palm Forest on Rapa Nui
Published: 2025-01-06
Subjects: Astrophysics and Astronomy, Earth Sciences, Ecology and Evolutionary Biology, Environmental Sciences, Forest Sciences, Other Astrophysics and Astronomy, Other Environmental Sciences, Other Plant Sciences, Physical Sciences and Mathematics, Planetary Sciences, Plant Sciences, The Sun and the Solar System
Can a repeating climate event be termed as a cosmic hyperobject? Even if it is dynamically changing within hundreds of thousands of years? At the center of this paper is the science: observable data, 15,000 years of climate change on Rapa Nui. Reaching into the past however we begin with a much broader mathematical view from the eyes of Milankovitch theories of the cosmos that stretches a million [...]
Water Storage in Hydrous Minerals in the Shallow Martian Mantle
Published: 2025-01-06
Subjects: Earth Sciences, Geochemistry, Geology, Planetary Geochemistry
In this paper we investigate the possibility of storing water in the shallow martian mantle under water-saturated fluid absent conditions for different bulk silicate mars (BSM) compositions. We performed phase equilibria experiments on two BSM compositions with comparable Mg number for pressure between 2 and 4 GPa, temperatures between 950 to 1150°C, and for a water content of 0.3 % wt. The [...]
Evaluation of the InSightSeers and DART Boarders mission observer programmes
Published: 2025-01-04
Subjects: Education, Higher Education, Physical Sciences and Mathematics, Planetary Sciences
Encouraging diversity in planetary science requires making a particular effort to bring a broader range of people onto the mission teams that are the backbone of the field. Observer programmes, which offer early-career researchers the chance to embed within a mission team during a science meeting, are one way of doing this. Here we present a quantitative analysis of the effectiveness of two [...]
Techno-economic analysis of natural and stimulated geological hydrogen
Published: 2025-01-03
Subjects: Earth Sciences
Geological hydrogen has emerged as a low-cost and low-carbon primary source of energy. This study provides a comprehensive techno-economic analysis of natural geological hydrogen (GH) and stimulated geological hydrogen (SGH) production, reaffirming its potential as a low-cost energy source. For the United States, we estimate production costs at $0.54/kg for GH and $0.92/kg for SGH, demonstrating [...]
Is the Suez Rift in its post-rift phase?
Published: 2025-01-03
Subjects: Earth Sciences, Geology, Geomorphology, Physical Sciences and Mathematics, Tectonics and Structure
Failed rifts are widely assumed to enter post-rift quiescence after termination of intracontinental rifting, but comprehensive, regional evaluations of their tectonic (in)activity are rare. Our quantitative, rift-scale geomorphic analyses in the Suez Rift, an archetypal failed rift in Egypt, reveals widespread rifting after presumed rift “failure”. Stacked topographic swaths document normal fault [...]
A Proposal to Create a Single Global Cap-and-Trade Scheme to Ensure a Ceiling on Gross CO2 Emissions below a Pre-set Allowable Carbon Budget
Published: 2025-01-03
Subjects: Environmental Studies
It is time for faithful and trustworthy world leaders to lead in establishing a “Global Cap-and-Trade regulatory framework” to change our course promptly. This framework aims to establish an institutional mechanism that ensures steadily decreasing global emission limits. The Scheme regulates upstream entities that import or produce fossil fuels, with the initiation of countries that share the [...]
Monthly Sea-Surface Temperature, Sea Ice, and Sea-Level Pressure over 1850–2023 from Coupled Data Assimilation
Published: 2025-01-03
Subjects: Atmospheric Sciences, Climate, Oceanography and Atmospheric Sciences and Meteorology
Historical observations of Earth's climate underpin our knowledge and predictions of climate variability and change. However, the observations are incomplete and uncertain, and existing datasets based on these observations typically do not assimilate observations simultaneously across different components of the climate system, yielding inconsistencies that limit understanding of coupled climate [...]
Sea level rise submergence simulations suggest substantial deterioration of Indian River Lagoon ecosystem services by 2050, Florida, U.S.A.
Published: 2025-01-03
Subjects: Climate, Earth Sciences, Environmental Indicators and Impact Assessment, Environmental Monitoring, Environmental Sciences, Geology, Geomorphology, Natural Resources and Conservation, Natural Resources Management and Policy, Sustainability, Water Resource Management
The Indian River Lagoon is a 250-km-long Estuary of National Significance located along the east-central Florida coast of the USA. NOAA tidal data generated at a station located in the central reaches of the estuary indicate sea level rise has accelerated over the duration of record to an average of 9.6 ± 1.6 mm year−1 (2003–2022). It is expected to continue accelerating over the duration of this [...]
Disentangling impact ejecta dynamics using micro–X-ray fluorescence (µ-XRF): a case study from the terrestrial Cretaceous-Paleogene (K-Pg) boundary
Published: 2024-12-31
Subjects: Physical Sciences and Mathematics
This study presents a non-destructive geochemical and petrographic workflow to generate high-resolution chemostratigraphic records across key stratigraphic intervals, here exemplified by a terrestrial Cretaceous-Paleogene (K-Pg) boundary sequence. The geochemical records fingerprint specific Chicxulub related impact ejecta products and thereby further constrain the timeline of ejecta deposition. [...]
HydroLang FRAM: Web-Based Framework for Comprehensive Flood Risk and Mitigation Assessment and Communication
Published: 2024-12-31
Subjects: Civil Engineering, Environmental Engineering, Hydraulic Engineering
As the frequency and impact of floods continue to rise, real-time systems for assessment and sharing flood risk and mitigation information are crucial for proactive stakeholder engagement, effective decision-making, and public education on flood risks. This study introduces an innovative web-based framework designed to revolutionize access and utilization of flood information for flood risk and [...]
L-Band Radiometric Measurement of Liquid Water in Greenland's Firn: Comparative Analysis with In Situ Measurements and Modeling
Published: 2024-12-31
Subjects: Earth Sciences, Glaciology
The addition and refreezing of liquid water to Greenland's accumulation area are increasingly important processes for assessing the ice sheet’s present and future mass balance, but uncertain initial conditions, complex infiltration physics, and limited field data pose challenges. Satellite-based L-band radiometry offers a promising new tool for observing liquid water in the firn layer, although [...]
Chromium Isotopes: A Window into Atmospheric Oxygenation
Published: 2024-12-31
Subjects: Earth Sciences, Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology
Chromium (Cr) isotopes are pivotal proxies for understanding Earth’s atmospheric oxygenation history. This review highlights δ53Cr signatures as tools for reconstructing redox dynamics during events like the Great Oxidation Event (GOE) and the Neoproterozoic Oxygenation Event (NOE). Advances in analytical techniques, particularly multi-collector inductively coupled plasma mass spectrometry [...]
Site Planning for a Network of Government-operated Weather Stations in the Dominican Republic Using Zonal Statistics from Geospatial Sources, Multi-Criteria Decision-Making, and Neighborhood Analysis
Published: 2024-12-30
Subjects: Applied Statistics, Climate, Earth Sciences, Environmental Monitoring, Environmental Sciences, Geographic Information Sciences, Geography, Meteorology, Oceanography and Atmospheric Sciences and Meteorology, Physical and Environmental Geography, Physical Sciences and Mathematics, Remote Sensing, Spatial Science
Many weather station networks lack sufficient representativeness, and their station density is often inadequate to capture spatial and climatic variability effectively. Optimal site selection is therefore essential to enhance spatial coverage and improve data quality. This study proposes a methodology for identifying optimal sites for a meteorological station network in the Dominican Republic, [...]