Preprints
There are 5647 Preprints listed.
Transdisciplinary doctoral training to address global sustainability challenges
Published: 2023-12-14
Subjects: Education, Engineering, Life Sciences, Social and Behavioral Sciences
Amplified seasonality in western Europe in a warmer world
Published: 2023-12-11
Subjects: Physical Sciences and Mathematics
Documenting the seasonal temperature cycle constitutes an essential step towards mitigating risks associated with extreme weather events in a future warmer world. The mid-Piacenzian Warm Period (mPWP), 3.3 – 3.0 million years ago, featured global temperatures approximately 3°C above pre-industrial levels. It represents an ideal period for directed paleoclimate reconstructions equivalent to model [...]
Sensitivity Analysis of Global Kinematics on Mantle Structure Using Automatically Generated Adjoint Thermochemical Convection Codes
Published: 2023-12-11
Subjects: Earth Sciences, Geophysics and Seismology, Numerical Analysis and Scientific Computing, Tectonics and Structure
Within the past 30 years, numerical models of mantle convection have been able to predict observations on Earth and planets, and among them tectonics. The possibility of building inverse problems in global geodynamics became concrete, and often involve the development of adjoint codes. Such tools provide efficient ways to estimate sensitivities of misfit functions relative to control parameters, [...]
GEE-PICX: Generating cloud-free Sentinel-2 and Landsat image composites and spectral indices for custom areas and time frames - a Google Earth Engine web application
Published: 2023-12-11
Subjects: Environmental Sciences
Earth observation satellites are collecting vast amounts of free and openly accessible data with immense potential to support environmental, economic, and social fields. As the availability of remotely sensed data increases, so do the methods for accessing and processing it. Many solutions exist for creating cloud-free image composites from often cloudy satellite data, but these typically require [...]
MultiRS Flood Mapper: A Google Earth Engine Application for Water Extent Mapping with Multimodal Remote Sensing and Quantile-Based Postprocessing
Published: 2023-12-11
Subjects: Engineering, Geotechnical Engineering, Hydraulic Engineering
Remote Sensing (RS) imagery is an important data source in surface water mapping applications thanks to its high spatial and temporal consistency and scalability. The introduction of Google Earth Engine (GEE) has cleared some of the major barriers of fast and large-scale RS-based geospatial analyses by providing easy and open access to most of the commonly used RS image products as well as [...]
FootNet v1.0: Development of a machine learning emulator of atmospheric transport
Published: 2023-12-09
Subjects: Atmospheric Sciences, Environmental Monitoring
There has been a proliferation of dense observing systems to monitor greenhouse gas (GHG) concentrations over the past decade. Estimating emissions with these observations is often done using an atmospheric transport model to characterize the source-receptor relationship, which is commonly termed measurement "footprint". Computing and storing footprints using full-physics models is becoming [...]
Comprehensive review of the annual haze episode in Northern Thailand
Published: 2023-12-09
Subjects: Environmental Sciences, Environmental Studies, Oceanography and Atmospheric Sciences and Meteorology, Public Health
The mountainous part of northern Thailand is subject to an intense haze episode occurring almost every year between January and May. In the last couple of decades, this atmospheric phenomenon has been extensively covered in the media and is now a main concern for the population living in this area. In this review, we synthesized the information available from hundreds of publications on air [...]
Plio-Pleistocene evolution of westerly moisture transport into the northern tropical Andes
Published: 2023-12-09
Subjects: Physical Sciences and Mathematics
Westerly winds from the eastern equatorial Pacific direct moisture into the Western Cordillera of the northern tropical Andes, where subsequent orographic lifting creates the wettest regions in the world. The Choco low-level jet is emblematic of broader westerly winds in this region and is projected to weaken by the end of the 21st century, but climate models show considerable disagreement about [...]
Will the ‘Anthropocene’ finally be formalized?
Published: 2023-12-08
Subjects: Geology, Stratigraphy
A proposal for the formalization of the ‘Anthropocene’ as a new geological epoch following the Holocene has just been submitted (31 October 2023) to the International Commission on Stratigraphy (ICS). This proposal, prepared by the Anthropocene Working Group (AWG) after 13 years of discussions, places the beginning of the ‘Anthropocene’ in the mid-20th century, and considers that the [...]
Salt Precipitation during Geological CO2 Storage: Effect of Access to Continuous Brine Source
Published: 2023-12-08
Subjects: Earth Sciences, Engineering, Environmental Sciences
During CO2 storage, the near-wellbore environment experiences significant chemical, physical, thermal, and mechanical perturbations. Therefore, it is crucial to characterize the coupled thermo-hydro-mechanical-chemical (THMC) processes in this region through representative experimental tests and numerical simulations to maximize the safety and cost-efficiency of CO2 storage. One common [...]
Overview of the MOSAiC expedition: Ecosystem
Published: 2023-12-08
Subjects: Marine Biology, Oceanography
An international and interdisciplinary sea ice drift expedition, the ‘The Multidisciplinary drifting Observatory for the Study of Arctic Climate‘ (MOSAiC), was conducted from October 2019 to September 2020. The aim of MOSAiC was to study the interconnected physical, chemical and biological characteristics and processes from the atmosphere to the deep sea of the central Arctic system. The [...]
Experimental and Numerical Description of Mineral Precipitation Dynamics on Heterogeneous Substrate Surfaces
Published: 2023-12-07
Subjects: Chemical Engineering, Earth Sciences, Environmental Sciences
Mineral precipitation reactions are critical in reactive transport studies of porous media due to their significant impacts on flow and transport properties. Understanding the nucleation process, a probabilistic phenomenon that determines the location and distribution of solid formation in space and time domains, is essential for accurately comprehending the effect of mineral precipitation on [...]
Comment on Hodgkins et al. (2018)
Published: 2023-12-07
Subjects: Biochemistry, Other Life Sciences, Terrestrial and Aquatic Ecology
Hodgkins et al. (2018) used mid infrared spectra (MIRS) to make inferences about the stability of peat against decomposition along a latitudinal gradient from the tropics to northern latitudes. Recently, we have shown that these spectral prediction models are biased and their predictions more uncertain than considered in Hodgkins et al. (2018) (Teickner and Knorr (2022)). Here, we show what [...]
Monitoring CO2 Concentrations in Soil Gas: A Novel MRV Approach for Cropland-Based ERW?
Published: 2023-12-07
Subjects: Earth Sciences, Environmental Sciences
This paper discusses the challenges we have faced in the past 2.5 years of field experiments trying to measure the speed of Enhanced Rock Weathering (ERW) in agricultural settings for removing CO₂ from the atmosphere. Traditional measurements that allow quantification of carbon dioxide removal (CDR) in laboratory ERW tests include chemical analyses of the leached out soil water and monitoring [...]
Uncrewed aerial vehicle-based assessments of peatland permafrost vulnerability along the Labrador Sea coastline, northern Canada
Published: 2023-12-07
Subjects: Physical Sciences and Mathematics
Palsas and peat plateaus in subarctic peatlands are some of the southernmost lowland permafrost landforms in the Northern Hemisphere. Peatland permafrost along the Labrador Sea coastline in northeastern Canada has remained largely understudied and uncharacterised, despite the importance of these landforms for wildlife, carbon stores, and Indigenous land users. In this study, we derived [...]