Biogeochemical processes are driven jointly by mass flux and metabolism, but biogeochemical contrasts across latitude are more strongly related to metabolism than to mass flux. Metabolism can be expressed in terms of metabolic potential, which is regulated by temperature, irradiance, and chemical feedstocks (nutrients, electron acceptors, organic matter). Metabolic potential of autotrophs in tr...

The goal of the note is to document a method of solving nutrient dynamics in biogeochemical models. Specially it focuses on improving numerical solutions of biogeochemical models (specifically soil model) so that 1) negative nutrient concentrations are not simulated and 2) serial access (i.e. microbes have first access, then plants) to nutrients is not required by the different nutrient consume...

Introduction Conclusions References

Citation: Lehmann MF, Simona M, Wyss S, Blees J, Frame CH, Niemann H, Veronesi M and Zopfi J (2015) Powering up the “biogeochemical engine”: the impact of exceptional ventilation of a deep meromictic lake on the lacustrine redox, nutrient, and methane balances. Front. Earth Sci. 3:45. doi: 10.3389/feart.2015.00045 Powering up the “biogeochemical engine”: the impact of exceptional ventilation of...

Citation: Vega MA, Kulkarni HV, Mladenov N, Johannesson K, Hettiarachchi GM, Bhattacharya P, Kumar N, Weeks J, Galkaduwa M and Datta S (2017) Biogeochemical Controls on the Release and Accumulation of Mn and As in Shallow Aquifers, West Bengal, India. Front. Environ. Sci. 5:29. doi: 10.3389/fenvs.2017.00029 Biogeochemical Controls on the Release and Accumulation of Mn and As in Shallow Aquifers...

The long-term goal of this study is to develop a better mechanistic and quantitative understanding of the effects of biologically-enhanced transport, mineralogy, sediment fabric, and particle surface chemistry on biogeochemical reactions occurring in coastal sediments. Specifically, we plan to provide quantitative expressions of biogeochemical processes from field and laboratory studies and to ...

Synthesizing published data, we provide a quantitative summary of the global biogeochemical cycle of vanadium (V), including both human-derived and natural fluxes. Through mining of V ores (130 × 109 g V/y) and extraction and combustion of fossil fuels (600 × 109 g V/y), humans are the predominant force in the geochemical cycle of V at Earth's surface. Human emissions of V to the atmosphere are...

Significant refinements of biogeochemical methods applied to mineral exploration have been made over the past quarter century, with advances on all continents. Databases from surveys around the world provide enhanced information on which species and tissues to collect from all major climatic environments, and how, why and when to sample. Recent commercialization of sophisticated new ICPMS analy...