Article,

First complete season of PMSE observations above Davis, Antarctica, and their relation to winds and temperatures

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Geophysical Research Letters, 34 (5): 5 (2007)Times Cited: 2 Cited References: BALSLEY BB, 1993, GEOPHYS RES LETT, V20, P1983 BARABASH V, 2004, ANN GEOPHYS-GERMANY, V22, P759 BERGER U, 2006, GEOPHYS RES LETT, V33 BREMER J, 2003, J GEOPHYS RES-ATMOS, V108 CHO JYN, 1993, REV GEOPHYS, V31, P243 CHO JYN, 1997, J GEOPHYS RES-ATMOS, V102, P2001 CZECHOWSKY P, 1979, GEOPHYS RES LETT, V6, P459 ECKLUND WL, 1981, J GEOPHYS RES, V86, P7775 FROIDEVAUX L, 2006, IEEE T GEOSCI REMOTE, V44, P1106 HALL CM, 1995, GEOPHYS RES LETT, V22, P3469 HOFFMANN P, 1999, GEOPHYS RES LETT, V26, P1525 HUAMAN MM, 1999, GEOPHYS RES LETT, V26, P1529 JARVIS MJ, 2005, GEOPHYS RES LETT, V32 LIVESEY NJ, 2006, IEEE T GEOSCI REMOTE, V44, P1144 LUBKEN FJ, 1999, GEOPHYS RES LETT, V26, P3581 LUBKEN FJ, 2004, J GEOPHYS RES-ATMOS, V109 MORRIS RJ, 2004, GEOPHYS RES LETT, V31 MORRIS RJ, 2005, GEOPHYS RES LETT, V32 MORRIS RJ, 2006, J ATMOS SOL-TERR PHY, V68, P418 OGAWA T, 2002, GEOPHYS RES LETT, V29 RAPP M, 2004, ATMOS CHEM PHYS, V4, P2601 ROBLE RG, 1987, J GEOPHYS RES, V92, P6083 SARANGO MF, 2003, 10 MST RAD WORKSH SC SCHOEBERL MR, 2006, IEEE T GEOSCI REMOTE, V44, P1166 WOODMAN RF, 1999, J GEOPHYS RES-SPACE, V104, P22577 Morris, Ray J. Murphy, Damian J. Klekociuk, Andrew R. Holdsworth, David A..

Abstract

A comprehensive account of the properties of southern hemisphere (SH) Polar Mesosphere Summer Echoes (PMSE) has been constrained by the lack of deployment of atmospheric radars. Here we present the first complete season of PMSE detected above the high-latitude station Davis, Antarctica (8.0 degrees E, 68.6 degrees S) using a 55-MHz atmospheric radar for the 2004-2005 austral summer. We present the characteristics and morphology of SH PMSE events observed during the interval 23 November 2004-18 February 2005. Coincident Aura satellite temperature measurements (T) and ground MF-radar partial reflection observations are used to investigate the thermal and dynamical state of the polar mesosphere during conditions of PMSE occurrence. We find that the seasonal envelope of PMSE corresponds remarkably well with the seasonal envelope of temperature or more precisely when T - T-fp < 0 K (T-fp = frost point temperature). Furthermore, we show that PMSE are linked with the typical summer equatorward flow of the mesosphere meridional wind, but were perturbed while this wind flowed poleward.

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