Preprints

Filtering by Subject: Biogeochemistry

Human Health Benefits of the Minamata Convention on Mercury

Yanxu Zhang, Stephanie Dutkiewicz, Huanxin Zhang, Shiliang Wu, Long Chen, Shuxiao Wang, Ping Li, Feiyue Wang

Published: 2020-05-17
Subjects: Atmospheric Sciences, Biogeochemistry, Climate, Earth Sciences, Environmental Health and Protection, Environmental Sciences, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

The Minamata Convention is a legally-binding international treaty aimed at reducing the anthropogenic release of mercury, a potent neurotoxin. However, its human health benefit has not been quantified on a global scale. Here we evaluate the Convention’s benefit by a coupled climate-atmosphere-land-ocean-ecosystem model and a human mercury exposure component that considers all food categories. We [...]

International disparities in open access practices of the Earth Sciences community

Olivier Pourret, David William Hedding, Dasapta Erwin Irawan, Haiyan Liu, Jonathan Tennant

Published: 2020-03-31
Subjects: Biogeochemistry, Cosmochemistry, Earth Sciences, Geochemistry, Geology, Geomorphology, Geophysics and Seismology, Glaciology, Hydrology, Library and Information Science, Mineral Physics, Other Earth Sciences, Paleobiology, Paleontology, Physical Sciences and Mathematics, Sedimentology, Social and Behavioral Sciences, Soil Science, Speleology, Stratigraphy, Tectonics and Structure, Volcanology

Short communication on international disparities in open access practices of the Earth Sciences community

On the potential of preprints in geochemistry: the good, the bad and the ugly

Olivier Pourret, Dasapta Erwin Irawan, Jonathan Tennant

Published: 2020-03-21
Subjects: Biogeochemistry, Cosmochemistry, Earth Sciences, Geochemistry, Library and Information Science, Physical Sciences and Mathematics, Social and Behavioral Sciences

Short communication on the use of preprint in geochemistry

Fate of adsorbed organic compounds during transformation of ferrihydrite: implications for biogenic origin of Precambrian iron formations

Stanislav Jelavic, Andrew Mitchell, Karina Krarup Sand

Published: 2020-01-30
Subjects: Biogeochemistry, Chemistry, Earth Sciences, Physical Chemistry, Physical Sciences and Mathematics

The absence of organic compounds from Precambrian iron formations (IF) challenges the hypothesis of their biogenic origin. Here we address the fate of adsorbed organic compounds during transformation from ferrihydrite to hematite. We determined the binding energy between hematite and common molecular terminations found in extracellular polymeric substances and biofilms: carboxylic, alcohol and [...]

Magnetite biomineralization in ferruginous waters and early Earth evolution

Kohen Bauer, James Byrne, Paul Kenward, Rachel Simister, Celine Michiels, Andre Friese, Aurele Vuillemin, Cynthia Henny, Sulung Nomosatryo, Jens Kallmeyer

Published: 2020-01-09
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Physical Sciences and Mathematics

Burial of large quantities of magnetite (Fe(II)Fe(III)2O4) in iron formations (IFs) likely contributed to the protracted oxidation of Earth’s surface during the Precambrian Eons. Magnetite can form through a diversity of biological and abiotic pathways and its preservation in IFs may thus be variably interpreted as the result of some combination of these processes. Such interpretations thus give [...]

Ge and Si isotope behavior during intense tropical weathering and ecosystem cycling

J. Jotautas Baronas, A. Joshua West, Kevin W. Burton, Douglas E Hammond, Sophie Opfergelt, Philip A. E. Pogge von Strandmann, Rachael H. James, Olivier J. Rouxel

Published: 2020-01-03
Subjects: Biogeochemistry, Earth Sciences, Physical Sciences and Mathematics

Chemical weathering of volcanic rocks in warm and humid climates contributes disproportionately to global solute fluxes. Geochemical signatures of solutes and solids formed during this process can help quantify and reconstruct volcanic weathering intensity in the past. Here, we measured silicon (Si) and germanium (Ge) isotope ratios of the soils, clays, and fluids from a tropical lowland [...]

Open Access publishing practice in Geochemistry: current state and look to the future

Olivier Pourret, Andrew Hursthouse, Dasapta Erwin Irawan, Karen Johannesson, Haiyan Liu, Marc Poujol, Romain Tartèse, Eric D. van Hullebusch, Wiche O

Published: 2019-12-09
Subjects: Biogeochemistry, Earth Sciences, Geochemistry, Physical Sciences and Mathematics

Open Access (OA) describes the free, unrestricted access to and re-use of research articles. Recently, a new wave of interest, debate, and practice surrounding OA publishing has emerged. In this paper, we provide a simple overview of the trends in OA practice in the broad field of geochemistry. Characteristics of the approach such as whether or not an article processing charge (APC) exists, what [...]

No support for carbon storage of >1000 GtC in northern peatlands

Zicheng Yu, Fortunat Joos, Thomas K. Bauska, Benjamin D. Stocker, Hubertus Fischer, Julie Loisel, Victor Brovkin, Gustaf Hugelius, Christoph Nehrbass-Ahles, Thomas Kleinen

Published: 2019-12-04
Subjects: Biogeochemistry, Earth Sciences, Physical Sciences and Mathematics

Northern peatlands store large amounts of carbon (C) and have played an important role in the global carbon cycle since the Last Glacial Maximum. Most northern peatlands have established since the end of the deglaciation and accumulated C over the Holocene, leading to a total present-day stock of 500 ± 100 GtC. This is a consolidated estimate, emerging from a diversity of methods. Recently, [...]

Simultaneous measurement of aqueous redox sensitive elements and their species across soil-water interface

Zhao-Feng Yuan, Williamson Gustave, Raju Sekar, Jonathan Bridge, Jia-Yue Wang, Wei-Jia Feng, Bin Guo, Zheng Chen

Published: 2019-11-20
Subjects: Biogeochemistry, Earth Sciences, Environmental Monitoring, Environmental Sciences, Physical Sciences and Mathematics

Soil-water interface (SWI) hosts versatile elements speciation and controls elements cycling in flooded lands. However, the study on the element’s interaction along SWI is limited by the sampling and analytical methods available. Here with an optimized ICP-MS method and an updated porewater sampler, we succeeded in simultaneously mapping the elements of environmental concerns in every 1.7 mm [...]

Macrophyte cover type and groundwater as the key drivers of the extremely high organic carbon concentration of soda pans

Emil Boros, Katalin V.-Balogh, Bianka Csitári, Lajos Vörös, Anna Székely

Published: 2019-11-20
Subjects: Biogeochemistry, Earth Sciences, Environmental Sciences, Other Environmental Sciences, Physical Sciences and Mathematics

1. Endorheic soda pans are among the aquatic systems that have the highest dissolved organic carbon (DOC) content on the planet with concentrations reaching values close to 1 g L−1. Considering the importance of inland waters in the global carbon cycle, the understanding of the drivers of such outstanding aquatic organic carbon pools is eminent. The soda pans of the Carpathian Basin present a [...]

Equifinality, Sloppiness, and emergent model structures of mechanistic soil biogeochemical models

Gianna Marschmann, Holger Pagel, Philipp Kuegler, Thilo Streck

Published: 2019-11-05
Subjects: Biogeochemistry, Earth Sciences, Environmental Sciences, Physical Sciences and Mathematics, Soil Science

Biogeochemical models increasingly consider the microbial control of car- bon cycling in soil. The major current challenge is to validate mechanistic descriptions of microbial processes and predicted system responses against experimental observations. We analyzed soil biochemical models of different complexity regarding parameter identifiability using information geometry, i.e. a model is [...]

A unique bacteriohopanetetrol stereoisomer of marine anammox

Rachel Schwartz-Narbonne, Philippe Schaeffer, Ellen C. Hopmans, Margot Schenesse, E. Alex Charlton, Martin Jones, Jaap Damste, Muhammad Farhan Ul Haque, Mike S. M. Jetten, Sabine Lengger

Published: 2019-10-31
Subjects: Biogeochemistry, Earth Sciences, Physical Sciences and Mathematics

Anaerobic ammonium oxidation (anammox) is a significant process for bioavailable nitrogen removal from marine systems. A bacteriohopanetetrol (BHT) isomer, with unknown stereochemistry, eluting later than BHT using high performance liquid chromatography (HPLC), was detected in ‘Ca. Scalindua profunda’ and proposed as a biomarker for anammox in marine paleo-environments. Four non-marine, [...]

On the difficulties of being rigorous in environmental geochemistry studies: some recommendations for designing an impactful paper

Olivier Pourret, BOLLINGER Jean-Claude, Eric D. van Hullebusch

Published: 2019-10-25
Subjects: Biogeochemistry, Chemistry, Earth Sciences, Environmental Chemistry, Environmental Sciences, Geochemistry, Other Environmental Sciences, Physical Sciences and Mathematics

There have been numerous environmental geochemistry studies using chemical, geological, ecological and toxicological methods but each of these fields requires more subject specialist rigour than has generally been applied so far. Field-specific terminology has been misused and the resulting interpretations rendered inaccurate. In this paper, we propose a series of suggestions, based on our [...]

River inflow dominates methane emissions in an Arctic coastal system

Cara C Manning, Victoria Preston, Samantha Jones, Anna Michel, David Nicholson, Patrick Duke, Mohamed Ahmed, Kevin Manganini, Brent Else, Philippe Tortell

Published: 2019-10-13
Subjects: Biogeochemistry, Earth Sciences, Environmental Monitoring, Environmental Sciences, Fresh Water Studies, Geochemistry, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Measurements of greenhouse gases in Arctic waters are strongly biased toward low-ice summer conditions, with few observations during periods of seasonal ice retreat. We present a year-round time series of dissolved methane (CH4) and nitrous oxide (N2O), along with targeted observations during ice melt of CH4 and carbon dioxide (CO2) in a river and estuary adjacent to Cambridge Bay, Nunavut, [...]

Skillful multiyear predictions of ocean acidification in the California Current System

Riley X Brady, Nicole S. Lovenduski, Stephen G. Yeager, Matthew C. Long, Keith Lindsay

Published: 2019-10-10
Subjects: Biogeochemistry, Climate, Earth Sciences, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

The California Current System (CCS) sustains economically valuable fisheries and is particularly vulnerable to ocean acidification, due to the natural upwelling of corrosive waters that affect ecosystem function. Marine resource managers in the CCS could benefit from advanced knowledge of ocean acidity on multiyear timescales. We use a novel suite of retrospective forecasts with an initialized [...]

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