Transient Eddy Forcing of the Rotational Flow during Northern Winter

Publisher Website
Google Scholar
Abstract
The total direct transient eddy forcing of the vorticity balance in the upper troposphere during northern winter is examined using 11 years of 2 to 8-day bandpassed global analyses. Most examinations of the importance of high-frequency eddy vorticity fluxes to the maintenance of either the climatological standing waves or low-frequency anomalous flows have focused on only the horizontal blow or the rotational component of the horizontal transient flow. The latter simplification has been shown to be questionable for planetary scales. The vorticity flux by the transient divergent flow produces a forcing of the mean streamfunction that is of comparable magnitude with the equivalent rotational term. However, the streamfunction forcing by the sum of the transient vertical advection and twisting terms largely balances the fearing by the vorticity flux convergence associated with the divergent flow. The result is that the convergence of the eddy vorticity flux by the total transient flow is not a good a... Abstract The total direct transient eddy forcing of the vorticity balance in the upper troposphere during northern winter is examined using 11 years of 2 to 8-day bandpassed global analyses. Most examinations of the importance of high-frequency eddy vorticity fluxes to the maintenance of either the climatological standing waves or low-frequency anomalous flows have focused on only the horizontal blow or the rotational component of the horizontal transient flow. The latter simplification has been shown to be questionable for planetary scales. The vorticity flux by the transient divergent flow produces a forcing of the mean streamfunction that is of comparable magnitude with the equivalent rotational term. However, the streamfunction forcing by the sum of the transient vertical advection and twisting terms largely balances the fearing by the vorticity flux convergence associated with the divergent flow. The result is that the convergence of the eddy vorticity flux by the total transient flow is not a good a...

This publication has 0 references indexed in Scilit: