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On the Distribution of Relative Humidity in Cirrus Clouds : Volume 4, Issue 1 (20/01/2004)

By Spichtinger, P.

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Book Id: WPLBN0003997615
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: On the Distribution of Relative Humidity in Cirrus Clouds : Volume 4, Issue 1 (20/01/2004)  
Author: Spichtinger, P.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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J. Smi, H. G., Spichtinger, P., Ovarlez, J., Gayet, J., & Gierens, K. (2004). On the Distribution of Relative Humidity in Cirrus Clouds : Volume 4, Issue 1 (20/01/2004). Retrieved from

Description: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany. We have analysed relative humidity statistics from measurements in cirrus clouds taken unintentionally during the Measurement of OZone by Airbus In-service airCraft project (MOZAIC). The shapes of the in-cloud humidity distributions change from nearly symmetric in relatively warm cirrus (warmer than −40°) to considerably positively skew (i.e. towards high humidities) in colder clouds. These results are in agreement to findings obtained recently from the INterhemispheric differences in Cirrus properties from Anthropogenic emissions (INCA) campaign (Ovarlez et al., 2002). We interprete the temperature dependence of the shapes of the humidity distributions as an effect of the length of time a cirrus cloud needs from formation to a mature equilibrium stage, where the humidity is close to saturation. The duration of this transitional period increases with decreasing temperature. Hence cold cirrus clouds are more often met in the transitional stage than warm clouds.

On the distribution of relative humidity in cirrus clouds


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