Coastal observation of halocarbons in the Yellow Sea and East China Sea during winter: Spatial distribution and influence of different factors on the enzyme-mediated reactions

Zou, Yawen; He, Zhen; Liu, Chunying; Qi, Qianqian; Yang, Gui‐Peng; Mao, Shi-Hai

doi:10.1016/j.envpol.2021.118022

Cited by 5 publications

(1 citation statement)

References 65 publications

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“…Gas standards of NMHCs in N2 (Linde Gases, Germany) were diluted to 0.1-1 ppb for identification and calibration. Details of temperature programming and detector parameters can be seen in Zou et al (2021) and Li et al (2019). The precision and detection limits for the trace gases in the present study were 1-7 % and 0.03-20.0 ppt, respectively (Table S1).…”

Section: Introductionmentioning

confidence: 75%

Roles of oceanic ventilation and terrestrial outflow in the atmospheric non-methane hydrocarbons over the Chinese marginal seas

Wang,

Xue,

et al. 2024

Preprint

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Abstract. Non-methane hydrocarbons (NMHCs) in the marine atmosphere have been extensively studied due to their important roles in regulating the atmospheric chemistry and climate. However, very little is known about the distribution and sources of NMHCs in the lower atmosphere over the marginal seas of China. Herein, we characterized the atmospheric NMHCs (C2-C5) in both the coastal cities and marginal seas of China in spring 2021, with a focus on identifying the sources of NMHCs in the coastal atmosphere. The NMHCs in urban atmospheres, especially for alkanes, were significantly higher compared to that in marine atmosphere, suggesting that terrestrial NMHCs may serve as an important reservoir/source of the marine atmosphere. A significant correlation was observed between the alkane concentrations and the distances from sampling sites to the nearest land or retention of air mass over land, indicating that alkanes in the marine atmosphere are largely influenced by terrestrial inputs through air-mass transport. For alkenes, a greater impact from oceanic emissions was determined due to the lower terrestrial concentrations, short atmospheric lifetime, and substantial sea-to-air fluxes of alkenes compared to alkanes (489 ± 454 vs 129 ± 106 nmol m-2 d-1). As suggested by the positive matrix factorization, terrestrial inputs contributed to 89 % of alkanes and 69.6 % of alkenes in Chinese marginal seas, subsequently contributing to 84 % of the ozone formation potential associated with C2-C5 NMHCs. These findings underscore the significance of terrestrial outflow in controlling the distribution and composition of atmospheric NMHCs in the marginal seas of China.

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Section: Introductionmentioning

confidence: 75%

Roles of oceanic ventilation and terrestrial outflow in the atmospheric non-methane hydrocarbons over the Chinese marginal seas

Wang,

Xue,

et al. 2024

Preprint

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Spatiotemporal distribution and environmental control factors of halocarbons in the Yangtze River Estuary and its adjacent marine area during autumn and spring

Zou

Liu

et al. 2022

Environmental Pollution

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Spatiotemporal distributions and oceanic emissions of short-lived halocarbons in the East China Sea

Yang

et al. 2023

Science of The Total Environment

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Coastal observation of halocarbons in the Yellow Sea and East China Sea during winter: Spatial distribution and influence of different factors on the enzyme-mediated reactions

Cited by 5 publications

References 65 publications

Roles of oceanic ventilation and terrestrial outflow in the atmospheric non-methane hydrocarbons over the Chinese marginal seas

Roles of oceanic ventilation and terrestrial outflow in the atmospheric non-methane hydrocarbons over the Chinese marginal seas

Spatiotemporal distribution and environmental control factors of halocarbons in the Yangtze River Estuary and its adjacent marine area during autumn and spring

Spatiotemporal distributions and oceanic emissions of short-lived halocarbons in the East China Sea

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