Spectra of gravity wave density and wind perturbations observed during ALOHA-90 on the 25 March flight between Maui and Christmas Island
- Univ. of Illinois, Urbana-Champaign (United States)
- Univ. of Adelaide (Australia)
The airborne Na lidar and Christmas Island MF radar were used to measure the spectra of gravity wave density and wind perturbations during ALOHA-90 on the 25 March mission. Wave activity was especially strong near Christmas Island with measured wind variances between 1,000 and 1,400 (m/s){sup 2}. The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of {minus}3.17 and {minus}2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near {minus}1. The magnitudes of the spectra were 4.9 {times} 10{sup 5} (m/s){sup 2}/(cyc/m) at the vertical wave number 2{pi}/(4 km), 8.4 {times} 10{sup 6} (m/s){sup 2}/(cyc/m) at the meridional wave number 2{pi}/(200 km) and 7 {times} 10{sup 5} (m/s){sup 2}/(cyc/m) at the temporal frequency 2{pi}/(1 h).
- OSTI ID:
- 5566317
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (United States), Vol. 18:7; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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