Observations of short period mesospheric wave patterns - In situ or tropospheric wave generation?

Details Observations of short period mesospheric wave patterns - In situ or tropospheric wave generation? Observations of short period mesospheric wave patterns - In situ or tropospheric wave generation?

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1337t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, July 1991, p. 1337-1340. USAF-supported research.

Other

19

Aloha System, Gravity Waves, Hydroxyl Radicals, Infrared Imagery, Near Infrared Radiation, Nightglow, Airglow, Charge Coupled Devices, Optical Radar, Radar Measurement, Upper Atmosphere

Scientific paper

Near infrared images showing wave structure in the hydroxyl (OH) nightglow emission have been obtained from Maui, Hawii during the ALOHA-90 campaign. Analysis of two nights during this campaign (March 25 and 31) indicate extensive, highly coherent, linear wave patterns of very short apparent period (about 5 and 10 min, respectively). Both displays exhibited several features characteristic of the in situ breakdown of a large scale, long period, upper atmospheric wave disturbance. Data in support of this mechanism was found by other ALOHA instruments which detected concurrent long period (1-2 hour) mesospheric wave disturbances on both occasions. However, a tropospheric source for these waves cannot be ruled out. At least on March 25, a weather front occurred at about 1400 km range with a favorable orientation and location. Although its range was relatively large, back-ground winds may have substantially increased the path length of the waves through the intervening atmosphere.

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