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Simulating Gas-aerosol-cirrus Interactions: Process-oriented Microphysical Model and Applications : Volume 3, Issue 5 (07/10/2003)

By Kärcher, B.

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Book Id: WPLBN0003974489
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Simulating Gas-aerosol-cirrus Interactions: Process-oriented Microphysical Model and Applications : Volume 3, Issue 5 (07/10/2003)  
Author: Kärcher, B.
Volume: Vol. 3, Issue 5
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2003
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Kärcher, B. (2003). Simulating Gas-aerosol-cirrus Interactions: Process-oriented Microphysical Model and Applications : Volume 3, Issue 5 (07/10/2003). Retrieved from http://www.ebooklibrary.org/


Description
Description: Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre (IPA), Oberpfaffenhofen, Germany. This work describes a process-oriented, microphysical-chemical model to simulate the formation and evolution of aerosols and ice crystals under the conditions prevailing in the upper troposphere and lower stratosphere. The model can be run as a box model or along atmospheric trajectories, and considers mixing, gas phase chemistry of aerosol precursors, binary homogeneous aerosol nucleation, homogeneous and heterogeneous ice nucleation, coagulation, condensation and dissolution, gas retention during particle freezing, gas trapping in growing ice crystals, and reverse processes. Chemical equations are solved iteratively using a second order implicit integration method. Gas-particle interactions and coagulation are treated over various size structures, with fully mass conserving and non-iterative numerical solution schemes. Particle types include quinternary aqueous solutions composed of H2SO4, HNO3, HCl, and HBr with and without insoluble components, insoluble aerosol particles, and spherical or columnar ice crystals deriving from each aerosol type separately. Three case studies are discussed in detail to demonstrate the potential of the model to simulate real atmospheric processes and to highlight current research topics concerning aerosol and cirrus formation near the tropopause. Emphasis is placed on how the formation of cirrus clouds and the scavenging of nitric acid in cirrus depends on small-scale temperature fluctuations and the presence of efficient ice nuclei in the tropopause region, corroborating and partly extending the findings of previous studies.

Summary
Simulating gas-aerosol-cirrus interactions: Process-oriented microphysical model and applications

 

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