Springtime boundary layer ozone depletion at Barrow, Alaska: Meteorological influence, year-to-year variation, and long-term change
Springtime boundary layer ozone depletion at Barrow, Alaska: Meteorological influence, year-to-year variation, and long-term change
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阿拉斯加巴罗春季边界层臭氧消耗：气象影响、逐年变化和长期变化
DOI：
10.1029/2011jd016889
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发表时间：
2012
影响因子：
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通讯作者：
J. Harris
中科院分区：
文献类型：
--
作者：
S. Oltmans;B. Johnson;J. Harris
[1]2008年4月和2009年3月至4月，对阿拉斯加巴罗附近的春季北极边界层臭氧损失进行了几周的逐日臭氧探空仪测量。从测深得到的消耗事件的垂直结构的详细图像显示，消耗被限制在大约最低的1000米，层顶的平均高度在∼500m。这两年在臭氧消耗事件的频率上形成了强烈的对比，这为研究这些事件发生的不同条件提供了机会。臭氧消耗事件的短期变化与主要源自北冰洋(消耗较多)或起源于较低纬度(消耗较少)的气流频率密切相关。随着天气尺度天气变化的开始，来自北冰洋的气流中断，富臭氧空气周期性地混合到边界层中，中断了无处不在的损耗事件。巴罗站38年的地面臭氧测量记录提供了一个独特的时间序列，揭示了臭氧消耗事件发生的强烈年际变化。在3月，而不是4月或5月，臭氧消耗事件的频率显著增加。3月份海冰枯竭事件的长期增加似乎是在北冰洋多年海冰减少并被第一年冰取代之后出现的。3月份发生的边界层臭氧事件的这一重大变化可能标志着北极氧化化学的变化，这与这一敏感区域的气候变化有关。
[1] In April 2008 and March–April 2009 near daily ozonesonde measurements were made over a several week period to study springtime Arctic boundary layer ozone loss in the vicinity of Barrow, Alaska. A detailed picture of the vertical structure of the depletion events from the soundings was obtained showing that the depletion was confined to approximately the lowest 1000 m with an average height of the top of the layer at ∼500 m. The two years were strongly contrasting in the frequency of ozone depletion events providing an opportunity for investigating the differing conditions under which these events develop. Short-term variability of the ozone depletion events is closely tied to the frequency of airflow that is primarily Arctic Ocean in origin (more depletion) or originates at lower latitudes (less depletion). The ubiquitous depletion events are interrupted by periodic mixing of ozone rich air into the boundary layer with the onset of synoptic scale weather changes that interrupt flow from off the Arctic Ocean. A 38-year record of surface ozone measurements at Barrow provides a unique time series that reveals the strong year-to-year variability of ozone depletion event occurrence. During March, but not April or May, there has been a significant increase in the frequency of ozone depletion events. This long-term increase in March depletion events appears to follow the decline in multiyear sea ice in the Arctic Ocean and its replacement by first-year ice. This significant change in the occurrence of boundary layer ozone events in March may signal a change in the oxidative chemistry in the Arctic that is related to climate change in this sensitive region.
对再生海冰盖上方北极大气溴的形成和分布的现场和卫星观测
影响因子：
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作者：
Son V. Nghiem;Ignatius G. Rigor;Andreas Richter;John P. Burrows;Paul B. Shepson;Jan Bottenheim;David G. Barber;Alexandra Steffen;Jeff Latonas;Feiyue Wang;Gary Stern;Pablo Clemente-Colón;Seelye Martin;Dorothy K. Hall;Lars Kaleschke;Philip Ta
通讯作者：
Philip Ta