Carbonyl sulfide in two estuaries and shelf waters of the western North Atlantic Ocean

Cutter, Gregory A.; Radford-Knoery, Joël

doi:10.1016/0304-4203(93)90228-g

Cited by 28 publications

(20 citation statements)

References 30 publications

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“…4b), as previously observed by Sciare et al (2002) in the Rhine estuary (Germany), Watts (2000) in Yarmouth estuary (UK), and Cutter and Radford-Knoery (1993) in two estuaries in the eastern US. The production of OCS in surface waters is thought to be controlled by photochemical processes, which depend on photosensitizer concentrations (Zepp and Andreae 1994), which in turn are related to phytoplankton concentrations (Kettle et al 2001).…”

Section: Distribution Of Dms Dmds and Mesh Along The Salinity Gradientsupporting

confidence: 76%

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

Cozic

Viollier

Chiffoleau

et al. 2008

Estuaries and Coasts

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Concentrations of volatile hydrogen sulfide (H 2 S), carbonyl sulfide (OCS), methane thiol (MeSH), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS) in the Seine estuary (France) were investigated in spring 2005 using samples collected from the first meter beneath the surface. Levels of dissolved metals (Ag, Cd, Cu, Zn, Ni, Co, Pb), suspended particulate matter, and particular organic carbon were also assessed. Maximum concentrations were 0.80 nM for H 2 S, 0.64 nM for OCS, 3.06 nM for MeSH, 11.06 nM for DMS, and 1.18 nM for DMDS, and different features were observed for the five volatile reduced sulfur compounds (VRSCs). Experiments were conducted to determine silver-VRSC conditional stability constants. Major interactions were observed between H 2 S and Ag, which may partially account for the absence of volatile H 2 S at the lowest salinities. OCS, MeSH, and DMS did not interact with Ag, as revealed by their insignificant K′ values. Variations in concentrations along the salinity gradient may be explained by the influence of phytoplanktonic compounds.

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Section: Distribution Of Dms Dmds and Mesh Along The Salinity Gradientsupporting

confidence: 76%

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

Cozic

Viollier

Chiffoleau

et al. 2008

Estuaries and Coasts

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“…We assume they reflect the DOM composition in our study region best due to their similarity in a 350 . We note other observed AQYs (Zepp and Andreae, 1994;Cutter et al, 2004), which vary by up to 2 orders of magnitude. In addition, the photoproduction rate constant p of OCS in Eq.…”

Section: -D Water Column Modules For Ocs and Csmentioning

confidence: 61%

The influence of dissolved organic matter on the marine production of carbonyl sulfide (OCS) and carbon disulfide (CS<sub>2</sub>) in the Peruvian upwelling

et al. 2019

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Abstract. Oceanic emissions of the climate-relevant trace gases carbonyl sulfide (OCS) and carbon disulfide (CS2) are a major source to their atmospheric budget. Their current and future emission estimates are still uncertain due to incomplete process understanding and therefore inexact quantification across different biogeochemical regimes. Here we present the first concurrent measurements of both gases together with related fractions of the dissolved organic matter (DOM) pool, i.e., solid-phase extractable dissolved organic sulfur (DOSSPE, n=24, 0.16±0.04 µmol L−1), chromophoric (CDOM, n=76, 0.152±0.03), and fluorescent dissolved organic matter (FDOM, n=35), from the Peruvian upwelling region (Guayaquil, Ecuador to Antofagasta, Chile, October 2015). OCS was measured continuously with an equilibrator connected to an off-axis integrated cavity output spectrometer at the surface (29.8±19.8 pmol L−1) and at four profiles ranging down to 136 m. CS2 was measured at the surface (n=143, 17.8±9.0 pmol L−1) and below, ranging down to 1000 m (24 profiles). These observations were used to estimate in situ production rates and identify their drivers. We find different limiting factors of marine photoproduction: while OCS production is limited by the humic-like DOM fraction that can act as a photosensitizer, high CS2 production coincides with high DOSSPE concentration. Quantifying OCS photoproduction using a specific humic-like FDOM component as proxy, together with an updated parameterization for dark production, improves agreement with observations in a 1-D biogeochemical model. Our results will help to better predict oceanic concentrations and emissions of both gases on regional and, potentially, global scales.

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“…Given a photochemical production of COS in the upper few meters near the surface, this assumption may be an oversimplification to a certain extent. However, only very few published COS depth profiles are available to test this assumption: Only one of five COS depth profiles from the Pettaquamscutt River Estuary and the Chesapeake Bay show a discernible gradient in the upper mixed layer (Cutter and Radford-Knoery, 1993). Similarly, only two out of eight depth profiles from the western North Atlantic (Radford-Kncery and Cutter, 1994) display near surface concentrations of a factor of about 2 higher compared to the base of the mixed layer.…”

Section: (A) Kinetic Modelmentioning

confidence: 99%

The diel cycle of carbonyl sulfide in marine surface waters: Field study results and a simple model

Uher

1997

Aquat Geochem

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The concentrations of atmospheric and dissolved carbonyl sulfide (COS) were measured during a Lagrangian study aboard the R/V Meteor in the northeast Atlantic Ocean, April/May 1992, and during a campaign on the research platform Nordsee in the German Bight (southeastern North Sea), September 1992. The arithmetic means and standard deviations of the COS saturation ratios were 1.27 4-0.58 (northeast Atlantic) and 3.23 ± 0.73 (German Bight). Sea surface COS showed a pronounced diel cycle with highest concentrations in the late afternoon and a mean concentration amplitude of about 2. To account for this diel cycle, we analyze our results using a simple empirical model, which includes a zeroth order photoproduction constant, sea surface UV light intensity, and terms for hydrolysis removal and air-sea exchange. Fitted and observed COS concentrations agreed to o o within 11 ~ (northeast Atlantic) and 14 ~ (German Bight). The in situ COS photoproduction constants 1 1 2 were (0.030 4-0.008) fmol L-s-W-m in the northeast Atlantic (n = 8) and (0.17 4-0.07) fmol I 1 1 2L-s-W-m in the German Bight (n = 10). After normalization to the cloud cover corrected UV irradiance at 40 ° latitude, we obtained sea surface COS production rates of (0.034 4-0.017) nmol L -1 d -1 in the northeast Atlantic and (1.62 4-0.62) nmol L -l d -1 in the German Bight. Currently available in situ photoproduction rates show a high degree of correlation with the UV absorbance (r 2 = 0.98, n = 4) and fluorescence (r 2 = 0.85, n = 4) of chromophoric dissolved organic matter (CDOM). The regional differences between the COS productivity in the northeast Atlantic Ocean and the German Bight is attributed to the distribution pattern of CDOM optical properties.

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Carbonyl sulfide in two estuaries and shelf waters of the western North Atlantic Ocean

Cited by 28 publications

References 30 publications

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

The influence of dissolved organic matter on the marine production of carbonyl sulfide (OCS) and carbon disulfide (CS<sub>2</sub>) in the Peruvian upwelling

The diel cycle of carbonyl sulfide in marine surface waters: Field study results and a simple model

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Carbonyl sulfide in two estuaries and shelf waters of the western North Atlantic Ocean

Cited by 28 publications

References 30 publications

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

Interactions between Volatile Reduced Sulfur Compounds and Metals in the Seine Estuary (France)

The influence of dissolved organic matter on the marine production of carbonyl sulfide (OCS) and carbon disulfide (CS&lt;sub&gt;2&lt;/sub&gt;) in the Peruvian upwelling

The diel cycle of carbonyl sulfide in marine surface waters: Field study results and a simple model

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The influence of dissolved organic matter on the marine production of carbonyl sulfide (OCS) and carbon disulfide (CS<sub>2</sub>) in the Peruvian upwelling