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On the Use of Mass-conserving Wind Fields in Chemistry-transport Models : Volume 2, Issue 5 (28/10/2002)

By Bregman, B.

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Book Id: WPLBN0003997289
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: On the Use of Mass-conserving Wind Fields in Chemistry-transport Models : Volume 2, Issue 5 (28/10/2002)  
Author: Bregman, B.
Volume: Vol. 2, Issue 5
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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Meijer, E., Krol, M., Segers, A., Velthoven, P. V., & Bregman, B. (2002). On the Use of Mass-conserving Wind Fields in Chemistry-transport Models : Volume 2, Issue 5 (28/10/2002). Retrieved from

Description: Royal Netherlands Meteorological Institute, P.O. Box 201, 3730 AE, De Bilt, Netherlands. A new method has been developed that provides mass-conserving wind fields for global chemistry-transport models. In previous global Eulerian modeling studies a mass-imbalance was found between the model mass transport and the surface pressure tendencies. Several methods have been suggested to correct for this imbalance, but so far no satisfactory solution has been found. Our new method solves these problems by using the wind fields in a spherical harmonical form (divergence and vorticity) by mimicing the physics of the weather forecast model as closely as possible. A 3-D chemistry-transport model was used to show that the calculated ozone fields with the new processing method agree remarkably better with ozone observations in the upper troposphere and lower stratosphere. In addition, the calculated age of air in the lower stratosphere show better agreement with observations, although the air remains still too young in the extra tropical stratosphere.

On the use of mass-conserving wind fields in chemistry-transport models


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