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Nitric acid partitioning in cirrus clouds: the role of aerosol particles and relative humidity

Krämer, Michael and Schiller, Cornelius and Ziereis, Helmut and Ovarlez, Joëlle and Bunz, Helmut (2006) Nitric acid partitioning in cirrus clouds: the role of aerosol particles and relative humidity. Tellus, 58B, pp. 141-147. DOI: 10.1111/j.1600-0889.2006.00177.x.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0889.2006.00177.x/pdf


Owing to the potential of cirrus clouds to vertically redistribute HNO<sub>3</sub> in the upper troposphere, the uptake of HNO<sub>3</sub> in ice particles is at the focus of recent research. Here, we investigate whether HNO<sub>3</sub> residing in freezing aerosol particles could be a relevant source of HNO<sub>3</sub> in ice clouds. To this end, model studies on the sensitivity of the uptake of HNO<sub>3</sub> in aerosol particles to temperature, relative humidity with respect to ice (RHice), particle composition and amount of available HNO<sub>3</sub> were performed. Combining the model results with the history of RHice during cirrus formation and comparison with field measurements indicates that at temperatures .lt. 200 K a considerable part of the HNO<sub>3</sub> in ice may originate from freezing particles containing HNO<sub>3</sub>.

Document Type:Article
Title:Nitric acid partitioning in cirrus clouds: the role of aerosol particles and relative humidity
AuthorsInstitution or Email of Authors
Krämer, MichaelFZ Jülich, Jülich
Schiller, CorneliusFZ Jülich, Jülich
Ziereis, HelmutUNSPECIFIED
Ovarlez, JoëlleCNRS Lab. de Météorologie Dynamique, Palaiseau, F
Bunz, HelmutFZ Karlsruhe, Karlsruhe
Journal or Publication Title:Tellus
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 141-147
Keywords:Nitric Acid, Cirrus Clouds, Upper Troposphere
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:12 Sep 2007
Last Modified:04 Sep 2012 16:38

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