A model of the temporal and spatial distribution of carbon monoxide in the mixed layer
Kettle, A. James
MetadataShow full item record
A field experiment demonstrated the presence of a diurnal cycle in the concentration of carbon monoxide ([CO]) in the upper ocean at the BATS site. A series of laboratory experiments and numerical simulations were carried out to assess the diurnal variation in [CO] both at the sea surface and in the upper layers of the water column down to 200 m. Published studies of this cycle have suggested that the dominant controlling processes are light-induced production, microbial CO consumption, surface degassing, and dilution due to entrainment of deeper CO-depleted water into the mixed layer. Laboratory experiments focussed on finding the production rate coefficient and the destruction rate. The numerical studies were conducted to simulate the diurnal cycle in [CO] at the sea surface and at depth, and the results confirmed the values of the production rate coefficient and destruction rate obtained by the laboratory experiments. The field measurements indicate that [CO] does not vanish below the euphotic zone as expected. This may be due to a possible blank correction to the measurements, low destruction rate at depth, or a small dark production rate. The CO consumption e-folding was optimized by numeric experiment and calculated to be about 52±9 h on the basis of a minimized sea surface [CO] deviation and 73±10 h on the basis of minimized CO inventory deviation. Laboratory determinations of apparent quantum yield and numeric experiment lead to an optimized sea surface production of CO 0.40 ± 0.05nMh-1. Finally, deviations between the [CO] measurements and numeric experiments suggest that factors controlling the CO budget may be subject to spatial and temporal patchiness.
Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 1994
Suggested CitationThesis: Kettle, A. James, "A model of the temporal and spatial distribution of carbon monoxide in the mixed layer", 1994-06, DOI:10.1575/1912/8851, https://hdl.handle.net/1912/8851
Showing items related by title, author, creator and subject.
Identity and dynamics of the microbial community responsible for carbon monoxide oxidation in marine environments Tolli, John D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2003-09)As colored dissolved organic matter in seawater absorbs UV solar radiation, a variety of simple chemical species are produced, including carbon monoxide (CO). The ocean surface water is saturated with respect to CO, and ...
Evidence for significant photochemical production of carbon monoxide by particles in coastal and oligotrophic marine waters Xie, Huixiang; Zafiriou, Oliver C. (American Geophysical Union, 2009-12-09)Carbon monoxide (CO) photoproduction from particulate and chromophoric dissolved organic matter (CDOM) was determined in seawater from open-ocean and coastal areas. In confirmatory tests, poisoned or non-poisoned filtered ...
Unexpected diversity of bacteria capable of carbon monoxide oxidation in a coastal marine environment, and contribution of the Roseobacter-cssociated clade to total CO oxidation Tolli, John D.; Sievert, Stefan M.; Taylor, Craig D. (American Society for Microbiology, 2006-03)The species diversity, phylogenetic affiliations, and physiological activity rates of carbon monoxide-oxidizing microorganisms were investigated, using new isolates from surface waters collected from the coast of New England ...