Intercomparison of the influence of tropospheric clouds on UV‐visible absorptions Detected during the NDSC Intercomparison Campaign at OHP in June 1996
Intercomparison of the influence of tropospheric clouds on UV‐visible absorptions Detected during the NDSC Intercomparison Campaign at OHP in June 1996
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1996 年 6 月 OHP 的 NDSC 比对活动期间检测到的对流层云对紫外可见光吸收影响的比对
DOI：
10.1029/1999gl900198
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发表时间：
1999
影响因子：
5.2
通讯作者：
T. Winterrath
中科院分区：
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作者：
K. Pfeilsticker;D. W. Arlander;J. Burrows;F. Erle;M. Gil;F. Goutail;C. Hermans;J. Lambert;U. Platt;J. Pommereau;A. Richter;A. Sarkissian;M. Van Roozendael;T. Wagner;T. Winterrath
研究了对流层云对平流层气体天顶天空光（或简短的 ZSL-DOAS）测量的影响。通过包括六台同时操作的紫外/可见光谱仪在内的大量比对研究，发现在所研究的积雨云 (Cb) 云下，O3、O4、NO2 和 H2O 的天顶天空吸收量显着增加。然而，推断的可见 O3 吸收的准确性会受到干扰 H2O 吸收的影响。多云天空吸收的增加归因于多重米氏散射导致的路径长度增加以及云内间隙气体吸收。发现 O4（和 H2O）等化学惰性气体检测到的吸收与 NO2 和 O3 检测到的吸收不一致。这一发现表明 O3 和 NO2 通过与云相关的传输或化学过程进行了改变。
The influence of tropospheric clouds on zenith sky light (or brief ZSL‐DOAS) measurements of stratospheric gases is investigated. From a large set of intercomparison studies including six simultaneously operated UV/visible spectrometers, the zenith sky absorptions of O3, O4, NO2, and H2O are found to increase considerably under the investigated Cumulonimbus (Cb) cloud. The accuracy of the inferred visible O3 absorptions, however, are affected by interfering H2O absorptions. The increased cloudy sky absorptions are attributed to increased pathlengths due to multiple Mie scattering and hence interstitial gaseous absorptions inside the cloud. The absorptions detected for chemically inert gases like O4 (and H2O) are found to be inconsistent with those detected for NO2 and O3. This finding indicates that O3 and NO2 are modified by cloud related transport or chemical processes.
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