Spectra of gravity wave density and wind perturbations observed during ALOHA‐90 on the 25 March flight between Maui and Christmas Island

Chris A. Hostetler; Chester S. Gardner; Robert A. Vincent; Drazen Lesicar

doi:10.1029/91GL01150

Spectra of gravity wave density and wind perturbations observed during ALOHA‐90 on the 25 March flight between Maui and Christmas Island

Chris A. Hostetler, Chester S. Gardner, Robert A. Vincent, Drazen Lesicar

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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 1000 and almost 1400 (m/s)². The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of −3.17 and −2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near −1. The magnitudes of the spectra were 4.9 × 10⁵ (m/s)²/(cyc/m) at the vertical wave number 2π/(4 km), 8.4 × 10⁶ (m/s)²/(cyc/m) at the meridional wave number 2π/(200 km) and 7 × 10⁵ (m/s)²/(cyc/m) at the temporal frequency 2π/(1 h).

Original language	English (US)
Pages (from-to)	1325-1328
Number of pages	4
Journal	Geophysical Research Letters
Volume	18
Issue number	7
DOIs	https://doi.org/10.1029/91GL01150
State	Published - Jul 1991

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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10.1029/91GL01150

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title = "Spectra of gravity wave density and wind perturbations observed during ALOHA‐90 on the 25 March flight between Maui and Christmas Island",

abstract = "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 1000 and almost 1400 (m/s)². The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of −3.17 and −2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near −1. The magnitudes of the spectra were 4.9 × 105 (m/s)²/(cyc/m) at the vertical wave number 2π/(4 km), 8.4 × 106 (m/s)²/(cyc/m) at the meridional wave number 2π/(200 km) and 7 × 105 (m/s)²/(cyc/m) at the temporal frequency 2π/(1 h).",

author = "Hostetler, {Chris A.} and Gardner, {Chester S.} and Vincent, {Robert A.} and Drazen Lesicar",

year = "1991",

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AU - Hostetler, Chris A.

AU - Gardner, Chester S.

AU - Vincent, Robert A.

AU - Lesicar, Drazen

PY - 1991/7

Y1 - 1991/7

N2 - 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 1000 and almost 1400 (m/s)². The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of −3.17 and −2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near −1. The magnitudes of the spectra were 4.9 × 105 (m/s)²/(cyc/m) at the vertical wave number 2π/(4 km), 8.4 × 106 (m/s)²/(cyc/m) at the meridional wave number 2π/(200 km) and 7 × 105 (m/s)²/(cyc/m) at the temporal frequency 2π/(1 h).

AB - 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 1000 and almost 1400 (m/s)². The vertical and meridional wave number spectra of horizontal wind perturbations exhibited power law shapes with slopes of −3.17 and −2.22, respectively. The temporal frequency spectrum appeared to be influenced by strong Doppler effects and had a shallow slope near −1. The magnitudes of the spectra were 4.9 × 105 (m/s)²/(cyc/m) at the vertical wave number 2π/(4 km), 8.4 × 106 (m/s)²/(cyc/m) at the meridional wave number 2π/(200 km) and 7 × 105 (m/s)²/(cyc/m) at the temporal frequency 2π/(1 h).

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Spectra of gravity wave density and wind perturbations observed during ALOHA‐90 on the 25 March flight between Maui and Christmas Island

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