Atmospheric Chemistry and Physics Ozone in the Boundary Layer Air over the Arctic Ocean: Measurements during the Tara Transpolar Drift 2006–2008
Atmospheric Chemistry and Physics Ozone in the Boundary Layer Air over the Arctic Ocean: Measurements during the Tara Transpolar Drift 2006–2008
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通讯作者：
J. Bottenheim;S. Netcheva;S. Morin;S. Nghiem
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作者：
J. Bottenheim;S. Netcheva;S. Morin;S. Nghiem
本文提供了远离陆地的北冰洋（北纬81 - 88）上空一整年的地面臭氧观测资料。这些数据是在2006年9月至2008年1月期间法国纵帆船塔拉号在北冰洋冻结期间漂移时获得的。这些数据证实，在极地日出后的春季（3月中旬至6月中旬），臭氧几乎完全消失。在一年中的其他时间，臭氧浓度与其他海洋观测结果相当，冬季摩尔分数约为100%。30-40 nmol mol −1和夏季最小值约为。20 nmol mol −1。与早先从北极沿海观测站获得的臭氧探测仪数据中观察到的情况相反，在大多数臭氧消耗事件期间，环境温度远高于零下20摄氏度。向后的轨迹计算表明，在这些ODE空气先前已经与冻结的海洋表面接触了几天，主要来自西伯利亚海岸，那里有几个大的开放式裂缝引线和冰穴在2007年春天发展。
A full year of measurements of surface ozone over the Arctic Ocean far removed from land is presented (81 • N– 88 • N latitude). The data were obtained during the drift of the French schooner TARA between September 2006 and January 2008, while frozen in the Arctic Ocean. The data confirm that long periods of virtually total absence of ozone occur in the spring (mid March to mid June) after Polar sunrise. At other times of the year, ozone concentrations are comparable to other oceanic observations with winter mole fractions of ca. 30–40 nmol mol −1 and summer minima of ca. 20 nmol mol −1. Contrary to earlier observations from ozone sonde data obtained at Arctic coastal observatories, the ambient temperature was well above −20 • C during most ODEs (ozone depletion episodes). Backwards trajectory calculations suggest that during these ODEs the air had previously been in contact with the frozen ocean surface for several days and originated largely from the Siberian coast where several large open flaw leads and polynyas developed in the spring of 2007.