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Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and photobleaching of chromophoric dissolved organic matter

A new approach for parameterizing dissolved organic matter (DOM) ultraviolet‐visible absorption spectra is presented. Two distinct spectral slope regions (275‐295 nm and 350‐400 nm) within…
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An antioxidant function for DMSP and DMS in marine algae

Results show that oxidative stressors, solar ultraviolet radiation, CO2 limitation, Fe limitation, high Cu2+ and H2O2 substantially increased cellular DMSP and/or its lysis to DMS in marine algal cultures, which probably influence the production of DMS and its release to the atmosphere.
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Impact of dimethylsulfide photochemistry on methyl sulfur cycling in the equatorial Pacific Ocean

Shipboard experiments were conducted in the equatorial Pacific Ocean to ascertain the relative importance of atmospheric ventilation, biological consumption, and photolysis in the removal of…
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Photochemical degradation of dissolved organic carbon and its impact on the oceanic carbon cycle

THE processes that regulate the cycling of oceanic dissolved organic carbon (DOC), one of the largest carbon reservoirs on the Earth's surface1, are largely unknown. DOC residues in the deep sea,…
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Contribution of sea surface carbon pool to organic matter enrichment in sea spray aerosol

Breaking waves on the ocean surface generate air bubbles that yield sea spray aerosols when released to the atmosphere. Measurements of sea spray aerosols in the North Atlantic Ocean and the coastal…
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Chemical and physical characteristics of nascent aerosols produced by bursting bubbles at a model air-sea interface

inorganic aerosol constituents were similar to those in ambient air. Ca 2+ was significantly enriched relative to seawater (median factor = 1.2). If in the form of CaCO3, these enrichments would have…
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A sea-state based source function for size- and composition-resolved marine aerosol production

Abstract. A parameterization for the size- and composition-resolved production fluxes of nascent marine aerosol was developed from prior experimental observations and extrapolated to ambient…
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Photochemical source of biological substrates in sea water: implications for carbon cycling

DISSOLVED organic carbon (DOC) in sea water represents one of the largest reservoirs of carbon on the earth1. The main fraction of this DOC is generally believed to be composed of old2, biologi-cally…
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Chapter 9 – Photochemistry and the Cycling of Carbon, Sulfur, Nitrogen and Phosphorus

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Photolysis and the dimethylsulfide (DMS) summer paradox in the Sargasso Sea

Apparent quantum yields and rates of dimethylsulfide (DMS) photolysis were determined from Sargasso Sea seawater with the goal of assessing the extent to which photoreactions affect the unusually…
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