Rocket Measurements of Mid-Latitude Sq Currents

Enhanced mid-latitude tropospheric warming in satellite measurements.

The spatial distribution of tropospheric and stratospheric temperature trends for 1979 to 2005 was examined, based on radiances from satellite-borne microwave sounding units that were processed with state-of-the-art retrieval algorithms. We found that relative to the global-mean trends of the respective layers, both hemispheres have experienced enhanced tropospheric warming and stratospheric co...

Rocket measurements of positive ions

Rocket measurements of positive ions during polar mesosphere winter echo conditions A. Brattli, T. A. Blix, Ø. Lie-Svendsen, U.-P. Hoppe, F.-J. Lübken, M. Rapp, W. Singer, R. Latteck, and M. Friedrich Norwegian Defence Research Establishment (FFI), P.O. Box 25, NO-2027 Kjeller, Norway Leibniz-Institute of Atmospheric Physics, Kühlungsborn, Germany Institute of Communication Networks and Satelli...

Subionospheric VLF measurements of the effects of geomagnetic storms on the mid-latitude D-region

We examine the effects on the mid-latitude D-region of two geomagnetic storms, the "Halloween storm" of late October 2003 and the 07 April 2000 storm, by means of the associated perturbations of several subionospheric VLF/LF signals propagating in both the northern and southern hemispheres. We use VLF/LF nighttime data from the Holographic Array for Ionospheric/Lightning Research (HAIL), locate...

Degradation of Mid-latitude Craters on Mars

Geographic control of Titan's mid-latitude clouds.

Observations of Titan's mid-latitude clouds from the W. M. Keck and Gemini Observatories show that they cluster near 350 degrees W longitude, 40 degrees S latitude. These clouds cannot be explained by a seasonal shift in global circulation and thus presumably reflect a mechanism on Titan such as geysering or cryovolcanism in this region. The rate of volatile release necessary to trigger cloud f...