Generalized Barotropic Models for Studying the Low -Frequency Variability of the Extratropical Atmosphere

Finally, the generalized model is scrutinized in terms of its normal, adjoint, optimal and singular modes. It is found that the modes of the empirically modified model are more stable than the ones of the barotropic model. Also the modified barotropic optimal modes are more difficult to excite than their barotropic counterparts. These results are in accordance with previous studies that found that barotropic dynamics may not quantitatively describe LFV. The singular modes of the modified operator have very similar patterns but explain less variance than the barotropic ones. This is consistent with the difficulty in detecting optimal patterns in observations. Finally, we find that the modified barotropic operator is more normal than the classic barotropic one, and thus less variable.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Atmospheric Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Mitas, Christos Michail

Contributors dc:contributor

• Robinson, Walter A.

• Physics, Atmospheric Science

Language dc:language

eng

Identifier

(MiAaPQ)AAI3101925

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/85959