秋季东海海域氢气的分布、光化学产生与释放通量研究

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Abstract The spatial distribution, photo-production rate and sea-to-air flux of hydrogen (H₂) were investigated in the East China Sea in October, 2021. The concentration of H₂ in the surface seawater ranged from 2.94 to 7.67nmol/L, with a mean of value (4.82 ±1.12) nmol/L. As the vertical distribution of H₂, the higher concentrations appeared at the bottom (11.86nmol/L) which attributed to the release from sediment, as an important source of H₂ in the bottom seawater, according to the sediment incubation experiment. The photo-productionrates varied between 0.42 and 1.14nmol/(L·h), with an average of (0.72 ±0.25) nmol/L. The ratio of the quotient of H₂ photo-production rates and cumulative photon flux under UV and PAR was 33:1. In addition, the saturation factors of H₂ ranged from 7.14 to 24.37, suggesting the concentrations of H₂ were oversaturated in seawater. The sea-to-air fluxes of H₂ were estimated to be from 0.53 to 9.19 μmol/(m²·d), with a meanof (3.50 ±1.86) μmol/(m²·d), which indicated that the East China Sea is the net source of atmospheric H₂.

Key words： Hydrogen distribution photo-production sea-to-air flux East China Sea

Received: 13 January 2023

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X511

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	JIANG Yu-cheng
	XU Gao-bin
	ZHOU Li-min
	ZHANG Hong-hai

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JIANG Yu-cheng,XU Gao-bin,ZHOU Li-min等. Spatial distribution, photo-production and flux of Hydrogen in the East China Sea in autumn[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(8): 3900-3908.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I8/3900

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