Mid‐latitude marine boundary‐layer ozone destruction at visible sunrise observed at Cape Grim, Tasmania, 41°S
Mid‐latitude marine boundary‐layer ozone destruction at visible sunrise observed at Cape Grim, Tasmania, 41°S
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DOI：
10.1029/1999gl010943
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发表时间：
2000-12
影响因子：
5.2
通讯作者：
I. Galbally;S. Bentley;C. Meyer
中科院分区：
文献类型：
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作者：
I. Galbally;S. Bentley;C. Meyer
本文分析了塔斯马尼亚41°S格里姆角远海边界层臭氧浓度13年的观测资料。这些数据显示，在日出后的最初几个小时内，臭氧浓度在仲夏和隆冬以约0.1 ppb h−1的速度下降。这种臭氧破坏现象导致每日臭氧损失率的不对称性，日出后破坏增强，在统计学上与O3-HOx破坏周期不同，O3-HOx破坏周期在中午达到峰值，并在仲夏和仲冬以相似的速率发生。这日出臭氧减少的原因进行检查使用臭氧守恒方程。我们推测，臭氧破坏在日出产生由于卤素化学。在海洋边界层光化学模型中，没有出现日出臭氧减少的情况，这意味着遥远的海洋边界层中臭氧的破坏率可能被低估了两倍。
An analysis is made of 13 years of observations of ozone concentrations in the remote marine boundary layer at Cape Grim, Tasmania 41°S. These data reveal a decrease in ozone concentration in the first few hours following sunrise at a rate of around 0.1 ppb h−1 in mid‐summer and in mid‐winter. This ozone destruction phenomenon causes an asymmetry in the daily ozone loss rate with enhanced destruction following sunrise, is statistically distinguishable from the O3‐HOx destruction cycle that peaks at mid‐day, and occurs at similar rates in mid‐summer and in mid‐winter. The cause of this sunrise ozone decrease is examined using the conservation equation for ozone. We speculate that ozone destruction at sunrise arises due to halogen chemistry. The absence of sunrise ozone decrease in models of marine boundary‐layer photochemistry means that the ozone destruction rate in the remote marine boundary layer is underestimated by perhaps a factor of two.