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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >STRATOSPHERIC CLO PROFILES FROM MCMURDO STATION, ANTARCTICA, SPRING 1992
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STRATOSPHERIC CLO PROFILES FROM MCMURDO STATION, ANTARCTICA, SPRING 1992

机译：1992年春季，南极MCMURDO站的球面CLO剖面

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摘要

We describe ground-based measurements of ClO made at McMurdo Station, Antarctica, during September and October 1992. Vertical profiles were retrieved from molecular rotational emission spectra at 278 GHz. Peak mixing ratios of 1.6 +/- 0.3 ppbv were seen in mid-September at approximately 18 km altitude, suggestive of somewhat larger quantities than were measured at the same site and season in 1987. As the core of the polar vortex moved away from McMurdo by early October, the ClO mixing ratio at this altitude dropped to less than 0.2 ppbv, coincident with increasing temperature, ozone, and NO2. The diurnal variation of ClO was also observed. The lower stratospheric layer from 15 to 27 km was found to reach approximately midday abundance by 2-3 hours after sunrise. The column abundance in this layer began to decrease by the period 4-2 hours before sunset and had declined to approximately one quarter of its midday value by 2-0 hours before sunset. In contrast, the ClO column in the upper stratosphere, from 28 to 50 km, built up slowly until midday and remained large while sunlight persisted. [References: 20]
机译：我们描述了1992年9月至10月在南极McMurdo站进行的ClO地面测量。垂直剖面是从278 GHz的分子旋转发射光谱中检索到的。在9月中旬，海拔约18 km，峰值混合比为1.6 +/- 0.3 ppbv，这表明其混合量比1987年同一地点和同一季节测得的混合量大。当极地涡旋的核心移离McMurdo时到10月初，与此高度相关的ClO混合比降至低于0.2 ppbv，这与温度，臭氧和NO2的增加相吻合。还观察到ClO的日变化。发现平流层下部15至27 km在日出后2-3小时达到大约中午的丰度。该层中的柱丰度在日落前4-2小时开始下降，到日落前2-0小时下降到其午间值的大约四分之一。相比之下，平流层上部28至50 km的ClO柱缓慢堆积直至中午，并在日照持续的情况下保持较大。 [参考：20]

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