Iron and sulfur cycling in the cGENIE.muffin Earth system model (v0.9.21)

The coupled biogeochemical cycles of iron and sulfur are central to the long-term biogeochemical evolution of Earth's oceans. For instance, before the development of a persistently oxygenated deep ocean, the ocean interior likely alternated between states buffered by reduced sulfur ("euxin...

Full description

Saved in:
Bibliographic Details
Published in:Geoscientific Model Development 2021-05, Vol.14 (5), p.2713-2745
Main Authors: van de Velde, Sebastiaan J, Hülse, Dominik, Reinhard, Christopher T, Ridgwell, Andy
Format: Article
Language:English
Subjects:
Analysis
Anoxia
Atmosphere
Atmospheric oxygen
Benthic boundary layer
Benthos
Bioavailability
Biogeochemical cycle
Biogeochemical cycles
Biogeochemistry
Buffers
Cretaceous
Cycles
Earth
Ecosystems
Fluxes
General circulation models
Geochemistry
Geology
Iron
Isotopes
Lakes
Mass extinction theory
Mass extinctions
Mathematical models
Mineral nutrients
Minerals
Nutrient cycles
Ocean circulation
Ocean currents
Oceans
Organic carbon
Oxidoreductions
Oxygen
Parameter sensitivity
Permian
Phosphates
Precipitation
Pyrite
Sediments
Sensitivity analysis
Siderite
Signatures
Solid phases
Species extinction
Sulfur
Sulfur compounds
Sulfur cycle
Sulfur isotopes
Sulphur
Triassic
Water circulation
Water column
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The coupled biogeochemical cycles of iron and sulfur are central to the long-term biogeochemical evolution of Earth's oceans. For instance, before the development of a persistently oxygenated deep ocean, the ocean interior likely alternated between states buffered by reduced sulfur ("euxinic") and buffered by reduced iron ("ferruginous"), with important implications for the cycles and hence bioavailability of dissolved iron (and phosphate). Even after atmospheric oxygen concentrations rose to modern-like values, the ocean episodically continued to develop regions of euxinic or ferruginous conditions, such as those associated with past key intervals of organic carbon deposition (e.g. during the Cretaceous) and extinction events (e.g. at the Permian-Triassic boundary). A better understanding of the cycling of iron and sulfur in an anoxic ocean, how geochemical patterns in the ocean relate to the available spatially heterogeneous geological observations, and quantification of the feedback strengths between nutrient cycling, biological productivity, and ocean redox requires a spatially resolved representation of ocean circulation together with an extended set of (bio)geochemical reactions.
ISSN:1991-9603
1991-959X
1991-962X
1991-9603
1991-962X
DOI:10.5194/gmd-14-2713-2021