| 离子迁移谱现场观测渤海和北黄海二甲基硫的研究 |
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| 引用本文： | 彭丽英,郭雨,娄婷婷,崔旭东,张桂成,傅晓婷,谷挺,马兴,孙军.离子迁移谱现场观测渤海和北黄海二甲基硫的研究[J].海洋学报,2022,44(1):1-10. |
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| 作者姓名： | 彭丽英 郭雨 娄婷婷 崔旭东 张桂成 傅晓婷 谷挺 马兴 孙军 |
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| 作者单位： | 1.天津科技大学 海洋与环境学院，天津 300457 |
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| 基金项目： | 天津市教委科研计划(2017KJ013)。 |
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| 摘 要： | 渤海、黄海是高产二甲基硫(Dimethyl Sulfide,DMS)的大陆架海区.该海区DMS的现场调查研究有助于准确评估海洋DMS释放量及其对全球气候变化的负反馈作用.目前,无论是基于模型还是直接测量法的通量估算均以表层海水或低层大气DMS浓度为基础,因此,先进的检测技术对其通量估算的准确度具有决定性作用.气相色谱法...
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| 关 键 词： | 离子迁移谱 二甲基硫 现场观测 海-气交换通量 全球气候变化 |
| 收稿时间： | 2021-07-10 |
Field investigation of dimethyl sulfur in the Bohai Sea and northern Yellow Sea by ion mobility spectrometry |
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| Peng Liying,Guo Yu,Lou Tingting,Cui Xudong,Zhang Guicheng,Fu Xiaoting,Gu Ting,Ma Xing,Sun Jun.Field investigation of dimethyl sulfur in the Bohai Sea and northern Yellow Sea by ion mobility spectrometry[J].Acta Oceanologica Sinica (in Chinese),2022,44(1):1-10. |
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| Authors: | Peng Liying Guo Yu Lou Tingting Cui Xudong Zhang Guicheng Fu Xiaoting Gu Ting Ma Xing Sun Jun |
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| Institution: | (College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin 300457,China;Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science and Technology,Tianjin 300457,China;Animal,Plant and Foodstuffs Inspection Center,Tianjin Customs,Tianjin 300461,China;College of Marine Science and Technology,China University of Geosciences(Wuhan),Wuhan 430074,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Wuhan),Wuhan 430074,China) |
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| Abstract: | The Bohai Sea and Yellow Sea are continental shelf areas with high production of dimethyl sulfide (DMS). Field investigation of DMS in this area is helpful to accurately assess its amount released from the ocean and its negative feedback on global climate change. Both model-based and direct measurement methods are based on DMS concentration in surface seawater and lower atmosphere, respectively, so advanced detection technology plays a decisive role in the accurate flux estimation. Gas chromatography, mass spectrometry, chemiluminescence and satellite remote sensing are commonly used observation techniques. At this paper, a method based on benzene-assisted photoionization positive ion mobility spectrometry (BAPI-PIMS) for in-situ observation of DMS in seawater is proposed. Combined with dynamic gas stripping and on-line water removal Nafion tube sampling system, the interference of environmental water vapor is eliminated. Under the optimal conditions, the linear range based on the two DMS product ions is 0.10?120 nmol/L, and the detection limit is as low as 0.065 nmol/L. Then the demonstrated method is applied to field detect DMS in the Bohai Sea and northern Yellow Sea, and the concentration of DMS in surface seawater ranged from 0.08 nmol/L to 0.96 nmol/L, while the air-sea exchange flux ranged from 0.12 μmol/(m2·d) to 17.75 μmol/(m2·d). Lastly, the difference between DMS detected on field and in lab and the main impact factors are discussed via the correlation analysis and canonical correspondence analysis, and results show that nutrients and phytoplankton community are the main factors during the seawater preservation, indicating the important significance of field observation method established currently for accurate evaluation of DMS release from the ocean. |
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| Keywords: | ion mobility spectrometry dimethyl sulfide field observation air-sea exchange flux global climate change |
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