Polar mesosphere summer echoes (PMSE) at Halley (76°S, 27°W), Antarctica
Article first published online: 31 MAR 2005
Copyright 2005 by the American Geophysical Union.
Geophysical Research Letters
Volume 32, Issue 6, March 2005
How to Cite
2005), Polar mesosphere summer echoes (PMSE) at Halley (76°S, 27°W), Antarctica, Geophys. Res. Lett., 32, L06816, doi:10.1029/2004GL021804., , , and (
- Issue published online: 31 MAR 2005
- Article first published online: 31 MAR 2005
- Manuscript Accepted: 25 FEB 2005
- Manuscript Revised: 18 JAN 2005
- Manuscript Received: 20 OCT 2004
 Polar Mesosphere Summer Echoes (PMSE) are a pointer to summer mesospheric conditions and have fuelled the debate over temperature differences between the Antarctic and Arctic mesopause regions. However few PMSE observations have ever been made in Antarctica. We present initial PMSE observations from Halley (76°S, 27°W), taken during January and February 2004. These are the first observations at such high southern latitude, the first using a dynasonde for detection, and the first at 28 MHz. PMSE are frequently observed and exhibit a double maximum in diurnal occurrence in contrast to published observations at similar Arctic latitudes. The PMSE season ends slightly earlier, relative to summer solstice, than in the Arctic. The strength of the PMSE appear similar to PMSE observed in the northern hemisphere; this is consistent with published falling sphere measurements showing similar summer mesopause temperatures in January in the Antarctic as in July in the Arctic.