On the development of baroclinic waves influenced by friction and heating

The influence of surface skin friction and a specific type of heating on the stability of baroclinic waves in a two-level, quasi-geostrophic model is investigated. It is found that the effect of friction alone changes the neutral stability curve in such a way that a broader band of wavelengths are unstable for a given value of the vertical windshear. The neutral stability curve is independent of the intensity of friction in this case. The effect of heating is to make all waves longer than a certain critical wave length unstable, but the amplification rate is very small for large values of the wavelength. The combined effect of friction and heating will in general tend to stabilize the waves. The amplification rate is investigated in all cases.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43246/1/24_2004_Article_BF00874891.pd

Recent Developments in Understanding Two-dimensional Turbulence and the Nastrom-Gage Spectrum

Two-dimensional turbulence appears to be a more formidable problem than three-dimensional turbulence despite the numerical advantage of working with one less dimension. In the present paper we review recent numerical investigations of the phenomenology of two-dimensional turbulence as well as recent theoretical breakthroughs by various leading researchers. We also review efforts to reconcile the observed energy spectrum of the atmosphere (the spectrum) with the predictions of two-dimensional turbulence and quasi-geostrophic turbulence.Comment: Invited review; accepted by J. Low Temp. Phys.; Proceedings for Warwick Turbulence Symposium Workshop on Universal features in turbulence: from quantum to cosmological scales, 200

A note on multiple flow equilibria

A set of ordinary differential equations describing a mechanical system subject to forcing and dissipation is considered. A topological argument is employed to show that if all time-dependent solutions of the governing equations are bounded, the equations admit N steady solutions, where N is a positive odd integer and where at least ( N −1)/2 of the steady solutions are unstable. The results are discussed in the context of atmospheric flows, and it is shown that truncated forms of the quasigeostrophic equations of dynamic meteorology and of Budyko-Sellers climate models satisfy the hypotheses of the theorem.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43139/1/24_2004_Article_BF00881609.pd

Mesoscale wind systems around the Great Lakes : final report

http://deepblue.lib.umich.edu/bitstream/2027.42/4336/5/bab5817.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/4336/4/bab5817.0001.001.tx

Observed land and lake breeze circulation on the eastern shore of Lake Michigan, 25 June, 1965

http://deepblue.lib.umich.edu/bitstream/2027.42/6899/5/bad0525.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/6899/4/bad0525.0001.001.tx