Observations of a 12 H wave in the mesopause region at the South Pole

Journal Article · Fri Jan 03 04:00:00 EST 1992 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/91GL02780· OSTI ID:5440058

Collins, R L; Senft, D C; Gardner, C S ^[1]

---

1. Univ. of Illinois, Urbana (United States)

In December 1989 a Na lidar was installed at the Amundsen-Scott South Pole Station and was used to measure aerosol, stratospheric temperature and mesospheric Na profiles through October 1990. The mesospheric Na data are used to characterize the gravity wave field in the mesopause region, These first lidar observations of Na layer dynamics at the South Pole show strong wave activity during the Antarctic winter. Data for 25 June and 19 August 1990 UT are presented here. The total wave induced variances in atmospheric density are respectively 29 and 35(%){sup 2}. The Na layer centroid height is very low during both observation periods. On 25 June a strong 12 h oscillation is observed in the bottomside of the Na layer which extends to altitudes as low as 74 km. The vertical displacement and temperature amplitudes associated with the 12 h oscillation are respectively 1.9 km and 19 K. The characteristics of the 12 h wave are similar to the pseudotide observed at Svalbard by Walterscheid et al.

• OSTI ID: 5440058
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 19:1; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ANTARCTIC REGIONS
ANTARCTICA
CHEMICAL COMPOSITION
DATA
DIMENSIONS
DYNAMICS
EARTH ATMOSPHERE
ELEMENTS
EXPERIMENTAL DATA
GRAVITY WAVES
HEIGHT
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
MECHANICS
MESOSPHERE
METALS
NUMERICAL DATA
OPTICAL RADAR
POLAR REGIONS
RADAR
RANGE FINDERS
SODIUM