Cite this paper:
Han Yu, He Zhen, Liu Shanshan, Gao Xuxu, Yang Guipeng. Variation of volatile halocarbons concentrations and its influencing factors in incubation experiments in the western Pacific Ocean[J]. Haiyang Xuebao, 2020, 42(2): 1-9

Variation of volatile halocarbons concentrations and its influencing factors in incubation experiments in the western Pacific Ocean

Han Yu1,2, He Zhen1,2, Liu Shanshan1,2, Gao Xuxu1,2, Yang Guipeng1,2,3
1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;
2. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao 266100, China;
3. Laboratory for Marine Ecology and Environment Science, Pilot National Laboratory for Marine Science and Technology (Qiangdao), Qingdao 266237, China
CH3I, CHCl3, C2HCl3 and CH2Br2 are the four important components of volatile halocarbons, which have important influence on atmospheric chemistry. To study the effect of Fe, ocean acidification, coupling effect of ocean acidification and Fe, coupling effect of Fe and N/P (16∶1) and dust on the concentrations of CH3I, CHCl3, C2HCl3 and CH2Br2 released by phytoplankton, an onboard incubation experiments was performed at the western Pacific Ocean in October 2018. Compared with the blank control experiment, the results show that the releases of CH3I, C2HCl3 and CH2Br2 in the experimental groups are suppressed in some extent. While the release of CHCl3 is promoted except when the dust is added. The concentration of Chl a is relatively high but the changes in nutrients concentrations are not obviously unconspicuous. In conclusion, the ocean acidification and iron fertilization might be the two virtual factors for phytoplankton to release volatile halocarbons. Besides, the growth of phytoplankton is affected significantly by the dust.
Key words:    volatile halocarbons    ocean acidification    dust    field incubation experiments    western Pacific Ocean   
Received: 2019-03-07   Revised: 2019-07-08
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