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On the Two-day Oscillations and the Day-to-day Variability in Global 3-d-modeling of the Chemical System of the Upper Mesosphere/Mesopause Region : Volume 12, Issue 5 (12/07/2005)

By Sonnemann, G. R.

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Book Id: WPLBN0004019716
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: On the Two-day Oscillations and the Day-to-day Variability in Global 3-d-modeling of the Chemical System of the Upper Mesosphere/Mesopause Region : Volume 12, Issue 5 (12/07/2005)  
Author: Sonnemann, G. R.
Volume: Vol. 12, Issue 5
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Grygalashvyly, M., & Sonnemann, G. R. (2005). On the Two-day Oscillations and the Day-to-day Variability in Global 3-d-modeling of the Chemical System of the Upper Mesosphere/Mesopause Region : Volume 12, Issue 5 (12/07/2005). Retrieved from http://hawaiilibrary.net/


Description
Description: Leibniz-Institute of Atmospheric Physics at the University Rostock in Kühlungsborn, D-18225 Ostseebad Kühlungsborn, Germany. The integration of the photochemical system of the upper mesosphere/mesopause region brought evidence that the system is able to respond in a nonlinear manner under certain conditions. Under the action of the diurnally-periodic insolation, the system creates subharmonic oscillations or chaos if disregarding strong diffusion, and under special conditions it possesses multiple solutions. The models used in the past were simplified and idealized in view of the number of dimensions and the consideration of the full dynamics. On the basis of our global 3-D-model of the dynamics and chemistry of the middle atmosphere (COMMA-IAP), we also found a nonlinear response in the photochemistry under realistic conditions. The model under consideration is not yet self-consistent, but the chemical model uses the dynamical fields calculated by the dynamic model. From our calculations we got period-2 oscillations of the photochemical system within confined latitudinal regions around the solstices but not during the equinoxes. The consequence of the period-2 oscillation of the chemical active minor constituents is that a marked two-day variation of the chemical heating rates is an important thermal pumping mechanism. We discuss these findings particularly in terms of the influence of realistic dynamics on the creation of nonlinear effects.

Summary
On the two-day oscillations and the day-to-day variability in global 3-D-modeling of the chemical system of the upper mesosphere/mesopause region

 

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