Preprints
There are 7999 Preprints listed.
Health system resilience in the face of climate change: A policy scoping review of Indonesia
Published: 2026-01-27
Subjects: Public Health
Indonesia has experienced more frequent climate-driven disasters and a rise in climate-sensitive diseases, underscoring the need for stronger climate adaptation strategies in health. This study assessed policies across health and supporting sectors to evaluate their contribution to building a climate-resilient health system (CRHS) and strengthening emergency response capacity. We conducted a [...]
Ocean climate variability and travel surveillance data inform understanding of global dengue dynamics
Published: 2026-01-28
Subjects: Public Health
Oceanic-atmospheric interactions significantly influence regional rainfall and vector-borne disease dynamics. Travel-related dengue cases serve as effective sentinels for dengue transmission, yet the impact of sea surface temperature (SST) variability on their occurrence remains under explored. Here we analyzed 2000–2019 GeoSentinel traveler dengue data alongside ERA5 SST and precipitation [...]
Improving 210Po low level measurements in seawater
Published: 2026-01-28
Subjects: Environmental Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Physics
Ocean is the largest sink of atmospheric carbon, atmospheric CO2 is synthesized by surface phytoplankton into particle organic carbon (POC) that is exported from the ocean surface to depth, where it can be stored for years. An accurate quantification of downward POC flux is crucial for making reliable predictions of present and future atmospheric CO2 concentrations. A method based on the [...]
Systematic Review of Dissolved Oxygen in Streams and Rivers: Advances, Challenges, and Opportunities
Published: 2026-01-29
Subjects: Environmental Sciences, Terrestrial and Aquatic Ecology
Dissolved oxygen (DO) has been extensively studied in streams and rivers. Despite this breadth of research, the processes governing DO are rarely quantified concurrently with whole-ecosystem measurements. To address this gap, we synthesize 230 empirical studies (1964-2024) to evaluate how, where, and with what methods oxygen exchanges—the processes by which oxygen enters and leaves streams—have [...]
The Role of Humidity in Past and Future Fire Weather Trends in the Contiguous United States
Published: 2026-05-06
Subjects: Other Earth Sciences, Risk Analysis
There has been evidence of increasing fire activity in the United States since approximately the 1980s, now estimated to cause tens to hundreds of billions of dollars of damage per year. Weather is one of the key drivers of fire activity, with hot, dry, and windy weather commonly associated with high-risk conditions. We are still, however, developing an understanding of how these weather [...]
Analyzing volcanic-like earthquakes with distributed acoustic sensing using a short segment of the Tongan seafloor telecommunications cable
Published: 2026-01-30
Subjects: Volcanology
The 2022 Hunga Tonga-Hunga Haʻapai (HTHH) eruption highlighted the need for monitoring submarine volcanoes. Distributed Acoustic Sensing (DAS), utilizing existing seafloor cables offers a promising solution. We analyze a one-week DAS dataset recorded in February 2023, one year after the eruption, using a 30-km segment of the domestic telecommunication cable in Tonga. The previous study (Nakano et [...]
A Multivariable Calculus Sustainability Infusion
Published: 2026-02-02
Subjects: Applied Mathematics, Other Applied Mathematics, Physical Sciences and Mathematics
Climate change is one of the big challenges facing this generation. Given the threats faced by climate change, it is important that everyone have an education that allows them to engage with the issue as an informed member of society. Typical math courses rarely include examples from Earth science or ecology as part of the curriculum. Incorporating sustainability into pre-requisite math classes [...]
Climate overshoot and the insurability frontier: peak stress, domestic capacity, and market retreat risk
Published: 2026-06-04
Subjects: Environmental Sciences, Environmental Studies, Geography, Oceanography and Atmospheric Sciences and Meteorology, Planetary Sciences
Climate overshoot can create mid-century peaks in climate stress before end-century temperatures stabilize, but its implications for insurance availability remain poorly understood. We assess subnational insurance market exit risk under overshoot across 1,590 first-order administrative regions in 88 countries, covering 4.54 billion people. Combining ADM1-level multi-hazard climate stress, an [...]
Who holds Brazil’s biodiversity? The pivotal role of private landholders
Published: 2026-01-29
Subjects: Social and Behavioral Sciences
The urgency of tackling the biodiversity crisis across the tropics is clear, yet governance structures such as land tenure can act as barriers or enablers for conservation. Here, we focus on Brazil, a megadiverse country that has made major efforts to link deforestation to individual properties through self-reported environmental registries. Yet, how these efforts support biodiversity explicitly, [...]
Modelling void fraction distributions in breaking hydraulic jumps
Published: 2026-02-02
Subjects: Engineering
We present two models for predicting void-fraction distributions in hydraulic jumps, addressing the limitations of the conventional two-layer formulation in representing continuous profiles. The first model introduces a two-state convolution to describe the smooth transition between the turbulent shear and roller regions, while the second applies a superposition framework to capture the [...]
Applicability of machine learning-based downscaling method to climate change prediction
Published: 2026-01-29
Subjects: Oceanography and Atmospheric Sciences and Meteorology
The precipitation characteristics that cause water-related disasters strongly depend on local factors such as topography. Therefore, high-resolution climate change projection data is needed to accurately assess regional flood disaster risk. Climate models generally have low resolution and are insufficient to reproduce observed precipitation distributions. Downscaling techniques are usually [...]
Mathematical modeling of dialectical emergent hybrid regimes in ecosystems
Published: 2026-01-30
Subjects: Life Sciences
Traditional resilience theory often models complex systems as toggling between discrete alternative regimes, such as clear-water and turbid states in shallow lakes, each stabilized by internal feedback. While analytically powerful, this binary paradigm overlooks more nuanced dynamics observed in many real-world systems: the emergence of hybrid regimes that blend structural and functional elements [...]
Calculation of Slope Terrain Movement Rate from Tree Trunk Deformation
Published: 2026-04-09
Subjects: Engineering
Movement of terrain on slopes, unless intense, as in the case of landslides, is practically imperceptible and the deformed trunks of trees growing on slopes are detectors of these movements. The deformation of a tree trunk may therefore be considered as a continuous record of terrain movement for the period of tree vegetation life. The cause of trunk deformation is a slight change in the [...]
Chemical Dosage Prediction for Drinking Water Treatment Using Random Forest and Polynomial Regression
Published: 2026-01-31
Subjects: Engineering
Predictive modeling of chemical dosage based on raw water quality can be useful in decision-making in operating a water treatment plant. In this study, two statistical methods, i.e., random forest and polynomial regression, are used for modeling the chemical usages in drinking water treatment based on the measured water quality parameters in source water. The daily chemical dosages and eight [...]
What Companies Say vs. What Matters: LLM Analysis of Biodiversity Disclosures in Oil and Gas
Published: 2026-01-31
Subjects: Artificial Intelligence and Robotics, Biodiversity, Oil, Gas, and Energy, Sustainability
The power system ecosystem encompasses infrastructure intensive industries such as electric utilities, hydropower operators, oil and gas producers, and mining companies supplying critical minerals. These industries share a common challenge: their physical assets interact extensively with natural ecosystems, creating dependencies and impacts that increasingly draw investor and stakeholder [...]