Simultaneous occurrence of polar stratospheric clouds and upper-tropospheric clouds caused by blocking anticyclones in the Southern Hemisphere

Polar stratospheric clouds and upper-tropospheric clouds

Introduction Conclusions References

On the seasonal onset of polar mesospheric clouds and the breakdown of the stratospheric polar vortex in the Southern Hemisphere

[1] Southern Hemisphere (SH) polar mesospheric clouds (PMCs), also known as noctilucent clouds, have been observed to be more variable and, in general, dimmer than their Northern Hemisphere (NH) counterparts. The precise cause of these hemispheric differences is not well understood. This paper focuses on one aspect of the hemispheric differences: the timing of the PMC season onset. Observations...

Properties of polar stratospheric clouds

Properties of polar stratospheric clouds obtained by combined ACE-FTS and ACE-Imager extinction measurements A. Y. Zasetsky, K. Gilbert, I. Galkina, S. McLeod, and J. J. Sloan Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1 Canada Department of Physics and Astronomy, University of Western Ontario, Ontario, Canada Received: 13 August 2007 – Accepted: 3 September 2007 –...

Tropospheric Precursors of Anomalous Northern Hemisphere Stratospheric Polar Vortices

Regional extratropical tropospheric variability affects the wave driving of the Northern Hemisphere wintertime stratospheric polar vortex. Simple reasoning is used to understand the nature of the regional variability that reinforces extratropical planetary waves, and thus zonal wavenumber-1 and wavenumber-2 vertical EP flux leaving the troposphere. In the reanalysis record and in WACCM (Whole A...

Lidar Measurements of Polar Stratospheric Clouds in the Arctic