Science. 1984 Jun 15;224(4654):1210-4. doi: 10.1126/science.224.4654.1210.
This article reports measurements of the column density of stratospheric chlorine monoxide and presents a complete diurnal record of its variation (with 2-hour resolution) obtained from ground-based observations of a millimeter-wave spectral line at 278 gigahertz. Observations were carried out during October and December 1982 from Mauna Kea, Hawaii. The results reported here indicate that the mixing ratio and column density of chlorine monoxide above 30 kilometers during the daytime are approximately 20 percent lower than model predictions based on 2.1 parts per billion of total stratospheric chlorine. The observed day-to-night variation of chlorine monoxide is, however, in good agreement with recent model predictions, confirms the existence of a nighttime reservoir for chlorine, and verifies the predicted general rate of its storage and retrieval. From this evidence, it appears that the chlorine chemistry above 30 kilometers is close to being understood in current stratospheric models. Models based on this chemistry and measured reaction rates predict a reduction in the total stratospheric ozone content in the range of 3 to 5 percent in the final steady state for an otherwise unperturbed atmosphere, although the percentage decrease in the upper stratosphere is much higher.
本文报道了平流层氯 monoxide 柱密度的测量结果，并给出了从夏威夷 Mauna Kea 进行的地面观测获得的该物质日变化（分辨率为 2 小时）的完整记录。观测于 1982 年 10 月和 12 月进行，观测波段为 278 千兆赫处的毫米波段。这里报告的结果表明，在 30 公里以上的白天，氯 monoxide 的混合比和柱密度比基于总平流层氯 2.1 部分/十亿的模型预测低约 20%。氯 monoxide 的日变化与最近的模型预测非常吻合，证实了夜间氯的储库的存在，并验证了其储存和检索的预测总体速率。有了这些证据，看来在当前的平流层模型中，30 公里以上的氯化学已经接近被理解。基于该化学和测量反应速率的模型预测，对于未受干扰的大气，在最终稳定状态下，总平流层臭氧含量将减少 3%至 5%，尽管高层平流层的减少幅度要高得多。
