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中国东海至南大洋航线海洋近地层大气氮氧化物分布特征
付丹,郑晓玲,陈军辉,韩同竹,等
作者单位E-mail
付丹 国家海洋局第一海洋研究所 874200984@qq.com 
郑晓玲 国家海洋局第一海洋研究所  
陈军辉 国家海洋局第一海洋研究所  
韩同竹 国家海洋局第一海洋研究所  
摘要:
摘要:为了探究我国东海至南大洋航线海洋近地层大气NOx分布特征,于2015年11月—2016年1月,利用中国极地科学考察船“雪龙号”的观测平台,采用Saltzman法对中国东海至南大洋航线海洋近地层大气NOx日平均浓度进行了监测. 结果表明,中国东海至南大洋航线海洋近地层大气NOx浓度变化范围为0.001~0.046 mg/m3,NO浓度变化范围为0.001~0.036 mg/m3,NO2浓度变化范围为未检出~0.015 mg/m3. 中国东海至南大洋航线海洋近地层大气中,NO是NOx主要成分. 南极圈外海洋近地层大气NOx分布特征显示离陆地越近,NOx浓度越高,NO2:NO值越大,反映出海陆差异及人为污染对海洋近地层大气的影响. 远离陆地的南大洋航段NOx显示较低的大洋背景值. 南桑威奇群岛的火山活动导致附近海域异常高浓度的NOx分布,NOx最高浓度达0.160 mg/m3,NO为0.145 mg/m3,NO2为0.015mg/m3. 西风带的阻隔导致该区域NOx向周围扩散时,难以穿越西风带,向南极大陆边缘扩散的趋势更加强烈,影响大范围南大洋近地层大气NOx浓度分布. 人为活动可能是南极半岛和中山站附近海洋近地层大气高浓度NOx和高NO2 : NO值的原因之一.
关键词:  南极科考航线  海洋近地层大气  氮氧化物  分布特征  南桑威奇群岛  火山活动
DOI:
分类号:
基金项目:南极周边海域海洋化学与碳通量考察(CHINARE2016-01-04),束星北青年学者计划项目(2016S2)
Distribution Characteristic of NOx in the Surface Layer Atmosphere of Ocean in the Route from China East Sea to Southern Ocean
fudan,zhengxiaoling,chenjunhui,hantongzhu,et al
Abstract:
Abstract: To research the distribution characteristic of NOx in the Surface Layer Atmosphere of Ocean in the route from Shanghai to Southern Ocean, the method of Saltzman were used to measure the daily average concentration of NOx in “XUE LONG”. Result showed that the daily average concentration of NOx ranged from 0.001 to 0.046 mg/m3 while the daily average concentration of NO ranged from 0.001 to 0.036 mg/m3 and NO2 ranged from zero to 0.015 mg/m3. NO is the main component of NOx in the surface layer atmosphere of ocean. The distribution characteristics of atmospheric NOx in the surface layer atmosphere of ocean outside of Antarctic Circle show that the closer to the land, the higher NOx concentration, the larger value of NO2: NO, which reflects the influence of anthropogenic pollution on the surface layer atmosphere of ocean and the difference between mainland and the ocean. NOx of the Southern Ocean segment away from mainland showed lower ocean background. The distribution of NOx is particularly high near the South Sandwich Islands caused by volcano activities. The concentration of NOx reached 0.160 mg/m3 while the concentration of NO reached 0.145 mg/m3 and NO2 reached 0.015 mg/m3. NOx caused by volcano activities showed a strong trend to diffuse to the Antarctic continent edge and had a great influence on Southern Ocean. It was isolated by westerly and affected the concentration distribution of NOx in a wide range of the surface layer atmosphere of Southern Ocean. The investigation may be one of the reasons of high concentration of NOx and high value of NO2: NO in the surface layer atmosphere of Southern Ocean near Antarctic Peninsula and Zhongshan station.
Key words:  Antarctic expedition route    the surface layer atmosphere of ocean  NOx  distribution  the South Sandwich Islands  volcano activities