Chemical characteristics of sulfur-containing aerosol particles across the western North Pacific and the Arctic Ocean

Yu, Chunyan; Yan, Jun; Zhang, Honghai; Qiu, Lin; Zheng, Huaiji; Zhao, Shuang; Zhong, Xinlin; Zhao, Shenghui; Zhang, Miming; Chen, Liqi

doi:10.1016/j.atmosres.2021.105480

Cited by 10 publications

(1 citation statement)

References 66 publications

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“…2). This consistency between atmospheric methanesulfonic acid and marine Chl‐ a was also reported by Yu et al (2021). Monitoring the DMS distribution in seawater is, therefore, of great significance for predicting the atmospheric methanesulfonic acid change.…”

Section: Resultssupporting

confidence: 89%

Occurrence and cycle of dimethyl sulfide in the western Pacific Ocean

Feng

Yan

Zhang

et al. 2021

Limnology & Oceanography

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Oceanic production and occurrence of dimethyl sulfide (DMS) and its subsequent ventilation to the atmosphere significantly contribute to the global sulfur cycle and impact the climate regulation. Spatial distributions of DMS, dimethylsulfoniopropionate (DMSP, precursor of DMS), and dimethyl sulfoxide (DMSO, oxidation product of DMS), production and removal processes of DMS (including biological production, microbial consumption, photo-degradation, and sea-to-air exchange), and biogenic contributions to the atmospheric sulfate burden were simultaneously studied in the western Pacific Ocean during winter. Sea surface DMS, DMSP, and DMSO were strongly correlated and had similar distribution patterns. The DMS photo-degradation efficiency ratio (normalized using incident photon flux density) for ultraviolet B radiation (UVB): ultraviolet A radiation (UVA): photosynthetically active radiation (PAR) was 391: 36: 1. However, considering the solar spectral composition, the actual contributions of UVB, UVA, and PAR to DMS photo-degradation in surface waters were 40.6% AE 10.7%, 41.2% AE 15.6%, and 18.2% AE 7.2%, respectively. When integrated across the entire mixed layer, UVA and PAR became the dominant drivers, accounting for 45.2% AE 18.0% and 38.0% AE 17.3% of DMS photo-degradation, respectively, as UVB was significantly attenuated in seawater. The DMS budget of the entire mixed layer indicated that microbial consumption, photo-degradation, and ventilation accounted for about 74.3% AE 11.9%, 19.3% AE 9.3%, and 6.5% AE 4.0% of total DMS removal, respectively. Even if ventilation was a minor DMS removal pathway, DMS emissions still contributed approximately 45.2% AE 25.6% of the atmospheric non-sea-salt sulfate burden over the western Pacific Ocean.

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Section: Resultssupporting

confidence: 89%