High-resolution distribution and emission of dimethyl sulfide and its relationship with pCO2 in the Northwest Pacific Ocean

Yan, Shi‐Bo; Li, Xiaojun; Feng, Xinbin; Zhang, Honghai; Wang, Jian; Zhang, Yueqi; Yang, Gui‐Peng; Zhuang, Guang‐Chao; Chen, Zhaohui

doi:10.3389/fmars.2023.1074474

Cited by 8 publications

(12 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2020) in the East China Sea in spring (DMS flux: 3.70 μmol m −2 d −1 ; DMS concentration:1.89 nmol L −1 ; lack of wind speed) and in summer (DMS flux: 7.42 μmol m −2 d −1 ; DMS concentration:1.23 nmol L −1 in summer; lack of wind speed), as well as with those from Yan et al. (2023) in the Northwest Pacific Ocean in winter (DMS flux: 5.37 μmol m −2 d −1 ; DMS concentration: 1.08 nmol L −1 ; wind speed: 8.76 m s −1 ). We could infer that variations in DMS concentration and wind speed are key factors that lead to dynamic changes of DMS flux in the YS and BS, which creates a great deal of uncertainty in the estimation of this region's DMS emissions.…”

Section: Resultssupporting

confidence: 70%

“…Various regional and seasonal differences of oceanic DMS concentrations in surface seawater have been reported by field studies and data compilation. For example, concentrations of DMS ranged from 0.63 to 2.28 nmol L −1 in the Northwest Pacific and its marginal seas (Yan et al., 2023). Higher values, as much as ∼8.8–14.7 nmol L −1 of DMS, have also been reported in polar areas with up to 25 folds concentration difference between winter and summer (Hulswar et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dimethylated Sulfur, Methane and Aerobic Methane Production in the Yellow Sea and Bohai Sea

Zhang

Tan

et al. 2023

JGR Oceans

View full text Add to dashboard Cite

This paper presents a comprehensive study of biogenic dimethylated sulfur compounds and methane (CH4) from 27 March to 16 April 2018 (spring) and from 24 July to 10 August 2018 (summer) in the Yellow Sea and Bohai Sea. The overall distributions of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP, precursor of DMS), dimethylsulfoxide (DMSO, oxidation product of DMS) and CH4 in surface waters were characterized by elevated concentrations in summer and in coastal waters, coupled to phytoplankton biomass and terrestrially sourced inputs. Surface waters were oversaturated with CH4. The flux distributions of DMS and CH4 were generally consistent with their concentration distributions. In situ incubation experiments revealed that microbial consumption was the main removal mechanism for DMS, which could remove up to 72.1% of the total DMS compared to sea‐to‐air exchange in the surface layer. High DMS release and enhanced DMS yields (34%‐62%) suggested more obvious influence from high DMSP concentrations (1 or 5 μm L‐1) on DMS production in oligotrophic waters with lower bacterial sulfur demand in contrast to near‐shore waters. Positive correlations were found between CH4 and DMSP (dissolved) in summer and DMSO (particulate and dissolved) in spring. A DMSP addition experiment suggested that DMSP could act as a precursor for aerobic methanogenesis, and CH4 preferentially occurs under nitrogen‐stressed conditions in the surface layers of the Yellow Sea and Bohai Sea.

show abstract

Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Dimethylated Sulfur, Methane and Aerobic Methane Production in the Yellow Sea and Bohai Sea

Zhang

Tan

et al. 2023

JGR Oceans

View full text Add to dashboard Cite

show abstract

“…Apparently, the sites E2-E7 were influenced by a strong wind field (2.93-3.47 m s -1 ), while the wind speed at the sites E1 (1.88 m s -1 ), E8 (0.97 m s -1 ) and E9 (1.11 m s -1 ) were relatively calm. For air-sea exchange, the calculated air-sea fluxes of CO 2 in this anticyclone eddy (-1.04 ± 0.80 mmol m -2 d -1 ) were lower than those reported values in the KOE region (-6.5 mmol m -2 d -1 , Sutton et al, 2017;-2.70 ± 2.31 mmol m -2 d -1 , Yan et al, 2023) and North Pacific extratropic (2.42 ± 0.67 mmol m -2 d -1 , Ishii et al, 2014). In addition, the sink of CO 2 at the eddy core (-1.27 ± 0.78 mmol m -2 d -1 ) was stronger than the eddy outside (-0.60 ± 0.57 mmol m -2 d -1 ).…”

Section: Effect Of Anticyclone Eddy On the Airsea Fluxes Of Gasescontrasting

confidence: 79%

The distribution and emission of CO2, CH4 and light hydrocarbons in an anticyclonic eddy of the Kuroshio extension

Wang

Qiao

et al. 2023

Front. Mar. Sci.

Self Cite

View full text Add to dashboard Cite

Mesoscale eddies are energetic and swirling circulations that frequently occur in the open ocean. The effects of mesoscale eddies on the biogeochemical cycling of climate-relevant gases remain poorly constrained. We investigated the distribution and air-sea fluxes of CO2, methane, and five non–methane hydrocarbons (NMHCs) in an anticyclone eddy of Kuroshio Extension during September 2019. Within eddy core, intense stratification hindered the replenishment of nutrients and favored the growth of small-size phytoplankton, such as Prochlorococcus. Seawater pCO2 decreased from 406.1 μatm at the eddy outside to 377.5 μatm at the eddy core, accompanied by a decrease in surface seawater temperature from 26.7 °C to 25.2 °C. The vertical distribution of methane (0.3-9.9 nmol L-1) was influenced by the eddy process, with a maximum at 80 m in the eddy core, which might be attributed to the degradation of phosphonates sustained by Prochlorococcus. The concentrations of five NMHCs (ethane, ethylene, propane, propylene, and isoprene) ranged from 17.2-126.2, 36.7-168.1, 7.5-29.2, 22.6-64.1, 54.5-172.1, 3.5-27.9 pmol L-1, respectively. Isoprene correlated well with Chl-a concentrations at the eddy core, while no significant correlation was observed at the eddy outside. Air-sea fluxes of CO2 and isoprene associated with the eddy core were higher than those of the eddy outside, while the maximum ventilation of methane and other NMHCs (ethane, ethylene, propane, and propylene) was found at the eddy outside. Collectively, physical processes such as eddies impact the production and distribution of light hydrocarbons in seawater and further influence their regional emissions to the atmosphere.

show abstract

“…Here, Ca and Cw are measured in situ, while k depends on wind speed. Cw is several orders of magnitude higher than Ca; hence Ca/H is often ignored (Yan et al, 2023). The seven parameterizations discussed give estimates of the k and Sc values.…”

Section: Methodsmentioning

confidence: 99%

Dimethyl sulfide (DMS) climatologies, fluxes, and trends – Part B: Sea-air fluxes

Joge,

Mahajan,

Hulswar

et al. 2024

Preprint

View full text Add to dashboard Cite

Abstract. Dimethyl sulfide (DMS) significantly contributes to cloud condensation nuclei (CCN) formation in the marine environment. DMS is ventilated from the ocean to the atmosphere, and in most models, this flux is calculated using seawater DMS concentrations and a sea-air flux parameterization. Here, climatological seawater DMS concentrations from interpolation and parameterization techniques are passed through seven flux parametrizations to estimate the DMS flux. The seasonal means of calculated fluxes are compared to identify differences in absolute values and spatial distribution, which show large differences depending on the flux parameterization used. In situ flux observations were used to validate the estimated fluxes from all seven parameterizations. Even though we see a correlation between the estimated and observed values, all methods underestimate the fluxes in the higher range (>20 µmol m-2 d-1) and overestimate the fluxes in the lower range (< 20 µmol m-2 d-1). The estimated uncertainty in DMS fluxes is driven by the uncertainty in seawater DMS concentrations in some regions but by the choice of flux parameterization in others. We show that the resultant flux is hence highly sensitive to both and suggest that there needs to be an improvement in the estimation methods of global seawater DMS concentration and sea-air fluxes for accurately modeling the effect of DMS on the atmosphere.

show abstract

High-resolution distribution and emission of dimethyl sulfide and its relationship with pCO2 in the Northwest Pacific Ocean

Cited by 8 publications

References 79 publications

Dimethylated Sulfur, Methane and Aerobic Methane Production in the Yellow Sea and Bohai Sea

Dimethylated Sulfur, Methane and Aerobic Methane Production in the Yellow Sea and Bohai Sea

The distribution and emission of CO2, CH4 and light hydrocarbons in an anticyclonic eddy of the Kuroshio extension

Dimethyl sulfide (DMS) climatologies, fluxes, and trends – Part B: Sea-air fluxes

Contact Info

Product

Resources

About