Preprints

Filtering by Subject: Planetary Biogeochemistry

The gap between atmospheric nitrogen deposition experiments and reality

Daniel Patrick Bebber

Published: 2021-05-05
Subjects: Agricultural Science, Agriculture, Atmospheric Sciences, Biogeochemistry, Environmental Indicators and Impact Assessment, Environmental Microbiology and Microbial Ecology Life Sciences, Environmental Monitoring, Forest Biology, Other Environmental Sciences, Planetary Biogeochemistry, Soil Science, Terrestrial and Aquatic Ecology

Anthropogenic activities have dramatically altered the global nitrogen (N) cycle. Atmospheric N deposition, primarily from combustion of biomass and fossil fuels, has caused acidification of precipitation and freshwater and triggered intense research into ecosystem responses to this pollutant. Experimental simulations of N deposition have been the main scientific tool to understand ecosystem [...]

How EU policies could reduce nutrient pollution in European inland and coastal waters?

Bruna Grizzetti, Olga Vigiak, Angel Udias, Alberto Aloe, Michela Zanni, Faycal Bouraoui, Alberto Pistocchi, Chiara Dorati, Rene Friedland, Ad De Roo, Carlos Benitez Sanz, Adrian Leip, Maria Bielza

Published: 2021-02-16
Subjects: Environmental Indicators and Impact Assessment, Planetary Biogeochemistry, Water Resource Management

Intensive agriculture and densely populated areas represent major sources of nutrient pollution for European inland and coastal waters, altering the aquatic ecosystems and affecting their capacity to provide ecosystem services and support economic activities. Ambitious water policies are in place in the European Union (EU) for protecting and restoring aquatic ecosystems under the Water Framework [...]

Decomposition of Amino Acids in Water with Application to In-Situ Measurements of Enceladus, Europa and Other Hydrothermally Active Icy Ocean Worlds

Ngoc Tuan Truong

Published: 2019-04-17
Subjects: Astrophysics and Astronomy, Physical Sciences and Mathematics, Planetary Biogeochemistry, Planetary Geochemistry, Planetary Sciences, The Sun and the Solar System

To test the potential of using amino acid abundances as a biosignature at icy ocean worlds, we investigate whether primordial amino acids (accreted or formed by early aqueous processes) could persist until the present time. By examining the decomposition kinetics of amino acids in aqueous solution based on existing laboratory rate data, we find that all fourteen proteinogenic amino acids [...]

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