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南大洋大气有机胺分布及来源特征研究
杨航,赵淑惠,林奇,王珊珊,史军,戴思颖,张麋鸣,许苏清,颜金培
0
(自然资源部第三海洋研究所,福建 厦门 361005;自然资源部海洋大气化学与全球变化重点实验室,福建 厦门 361005;泰山学院旅游学院,山东 泰安 271000)
摘要:
依托中国第36次南极科学考察,利用船载走航气溶胶及气体组分在线分析仪对南大洋大气中气态和颗粒态有机胺进行了在线观测。获得了南大洋开阔海域及普里兹湾大气中高分辨气态和颗粒态有机胺的组成及分布,并对其来源特征进行了分析。结果表明:南大洋大气有机胺以气态三甲胺(TMA)和二甲胺(DMA)为主要存在形态,其均值分别为(104.0±285.2)、(3.5±6.0) ng/m3。普里兹湾大气中有机胺的平均浓度显著高于南大洋开阔海域,气态TMA和DMA均值分别达到(289.0±396.6)、(5.6±16.1) ng/m3。南大洋大气中气态TMA、DMA和氨气(NH3)在不同区域内均具有良好的线性关系,表明三者具有同源性。从来源分析,南大洋大气有机胺主要受到海洋生物活动的影响,但在海冰边缘区及南极近岸海域,企鹅等动物的生物活动会导致大气中有机胺的浓度显著升高。
关键词:  海洋化学  海洋气溶胶  有机胺  南大洋
DOI:10.3969/J.ISSN.2095-4972.20230203001
基金项目:国家自然科学基金(41941014);自然资源部第三海洋研究所基本科研业务费(海三科2019024)
Characteristics of atmospheric amine distribution and source over the Southern Ocean
YANG Hang,ZHAO Shuhui,LIN Qi,WANG Shanshan,SHI Jun,DAI Siying,ZHANG Miming,XU Suqing,YAN Jinpei
(Third Institute of Oceanography, MNR, Xiamen 361005, China;Key Laboratory of Global Change and MarineAtmospheric Chemistry, MNR, Xiamen 361005, China;School of Tourism, Taishan University, Tai’an 271000, China)
Abstract:
The composition and distribution of atmospheric aerosols and gaseous organic amines over the Southern Ocean and the Antarctic nearshore area were investigated for the first time during the 36th CHINARE by online observation and their source characteristics were analyzed. Results show that gaseous trimethylamine and dimethylamine are the main forms of organic amines in the Southern Ocean, with mean values of (104.0±285.2) and (3.5±6.0) ng/m3, respectively. The concentrations of organic amines in the Antarctic near-shore area are significantly higher than the average oceanic concentrations, for example, the mean values of gaseous trimethylamine and dimethylamine over Prydz Bay reach (289.0±396.6) and (5.6±16.1) ng/m3, respectively. Gaseous trimethylamine, dimethylamine and ammonia over the Southern Ocean showed good linearity in different regions, indicating their homology. From the source analysis, the atmospheric organic amines over the Southern Ocean are mainly influenced by marine biological activities, but in the sea ice edge area and the Antarctic near-shore area, animal activities such as penguin emissions can lead to a significant increase in the concentration of organic amines in the atmosphere.
Key words:  marine chemistry  marine aerosol  alkylamine  Southern Ocean

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