Observation of surface ozone in the marine boundary layer along a cruise through the Arctic Ocean: From offshore to remote
Observation of surface ozone in the marine boundary layer along a cruise through the Arctic Ocean: From offshore to remote
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沿着北冰洋航行对海洋边界层表面臭氧的观测：从近海到远程
DOI：
10.1016/j.atmosres.2015.10.009
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发表时间：
2016-03
影响因子：
5.5
通讯作者：
Zhouqing Xie
中科院分区：
文献类型：
--
作者：
Juan Yu;Chen Sun;Peipei Ye;Zhouqing Xie
臭氧是对流层中一种重要的活性气体，常被用来估算大气的氧化能力。然而，有关北冰洋尤其是北冰洋中部海面臭氧的资料很少。对中国第5次北极科学考察（2012年6 - 9月）期间沿着海洋边界层臭氧进行了研究。这次航行的纬度和纬度范围为31.1°N-87.7°N和9.3°E-90°E-168.4°W。1小时平均臭氧变化从9.4 ppbv到124.5 ppbv沿着巡航。混合比最高的海域是东海和日本海，最低的海域是楚科奇海。中国东海、日本海和冰岛近海的臭氧水平相对较高，是由附近大陆的前体和/或臭氧输送造成的。在31-45°N范围内，东海和日本海的臭氧混合比随纬度的增加而减小，在62-69°N范围内，冰岛近海的臭氧混合比随纬度的增加而减小，减小幅度约为2 ppbv/°。在整个北冰洋，臭氧水平相对较低，从9.4 ppbv到36.1 ppbv不等，平均值为23.8 ± 4.6（平均值±标准差）ppbv，这与巴罗观测站在同一时期观测到的数据没有统计学差异。与污染区上空的臭氧不同，在69-87°N观察到臭氧略有增加的趋势。这一现象可归因于垂直输送和太阳辐射引起的化学过程的作用。
Ozone is an important reactive gas in the troposphere; it has been frequently used to estimate atmospheric oxidation capacity. However, there are few data of surface ozone over the Arctic Ocean, especially the central Arctic Ocean. Here, surface ozone in the marine boundary layer along the cruise path during the 5th Chinese Arctic Research Expedition (June to September, 2012) was investigated. The latitudes and longitudes covered in the cruise were 31.1°N–87.7°N and 9.3°E–90°E–168.4°W. The 1-h-averaged ozone varied from 9.4 ppbv to 124.5 ppbv along the cruise. The highest mixing ratios appeared in the East China Sea and the Sea of Japan while the lowest in the Chukchi Sea. The relatively high ozone levels over the East China Sea, the Sea of Japan, and offshore Iceland were caused by transport of precursors and/or ozone from the nearby continent. Ozone mixing ratio decreasing by ~ 2 ppbv/° with increasing latitude was observed during 31–45°N covering the East China Sea and the Sea of Japan, and during 62–69°N covering offshore Iceland. Over the entire Arctic Ocean, ozone levels were relatively low, varying from 9.4 ppbv to 36.1 ppbv with an average of 23.8 ± 4.6 (mean ± standard deviation) ppbv, which was not statistically different with data observed at Barrow observatory during the same period. Unlike ozone over contaminated areas, a slight increasing trend of ozone in 69–87°N was observed. This phenomenon may be ascribed to the role of both vertical transport and chemical processes due to solar radiation.
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影响因子：
2.9
作者：
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影响因子：
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