Measurements of gravity wave activity within and around the Arctic stratospheric vortex
- 1 June 1997
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 24 (11) , 1387-1390
- https://doi.org/10.1029/97gl01322
Abstract
Lidar measurements of gravity wave activity have been conducted at Eureka in the High Arctic since 1993. The waves are detected by the fluctuations they induce in temperature. It has been found that the amount of wave energy in the upper stratosphere is related to the position of the stratospheric polar vortex. In each of the four winters reported here, the wave activity was a maximum within the westerly jet at the edge of the vortex, a minimum inside the vortex near its centre and intermediate outside the vortex. The spectra of wave induced fluctuations show that it is at the longest resolved vertical wavelengths (8 to 15 km) that wave energy is being influenced by the background meteorological conditions. These findings are interpreted in terms of the Doppler shifting and critical level filtering that is imposed by the background wind profile.This publication has 15 references indexed in Scilit:
- Nonlinearity of gravity wave saturated spectra in the middle atmosphereGeophysical Research Letters, 1996
- A Climatology of the Aleutian HighJournal of the Atmospheric Sciences, 1996
- “Downward Control” of the Mean Meridional Circulation and Temperature Distribution of the Polar Winter StratosphereJournal of the Atmospheric Sciences, 1994
- Mountain-Wave Drag in the Stratosphere and Mesosphere Inferred from Observed Winds and a Simple Mountain-Wave Parameterization SchemeJournal of the Atmospheric Sciences, 1993
- Small‐scale waves encountered during AASEGeophysical Research Letters, 1990
- The Separated Polar Winter Stratopause: A Gravity Wave Driven Climatological FeatureJournal of the Atmospheric Sciences, 1989
- Warm Stratopause in the Antarctic WinterJournal of the Atmospheric Sciences, 1989
- Propagation and Selective Transmission of Internal Gravity Waves in a Sudden WarmingJournal of the Atmospheric Sciences, 1984
- The Role of Gravity Wave Induced Drag and Diffusion in the Momentum Budget of the MesosphereJournal of the Atmospheric Sciences, 1982
- Turbulence and stress owing to gravity wave and tidal breakdownJournal of Geophysical Research: Oceans, 1981