Accession Number:

ADA525536

Title:

Mountain Waves in the Middle Atmosphere: Microwave Limb Sounder Observations and Analyses

Descriptive Note:

Journal article

Corporate Author:

CALIFORNIA INST OF TECHNOLOGY PASADENA JET PROPULSION LAB

Report Date:

2003-01-01

Pagination or Media Count:

7.0

Abstract:

Observations and analyses of mesoscale gravity waves in the stratosphere from the Upper Atmosphere Research Satellite UARS Microwave Limb Sounder MLS are summarized, with focus on global distribution of topography related wave activities. We found most of the orographical wave activities occur during the winter seasons over high latitude mountain ridges. In the northern hemisphere, the strongest waves are those over Scandinavia, Central Eurasia, and southern Greenland, whereas in the southern hemisphere, wave activities are outstanding over the Andes, New Zealand, and Antarctic rim, MLS observations suggest that these orographic waves are located mostly on the down stream side of the mountain ridge with downward phase progression and have horizontal phase velocities opposite to the stratospheric jet-stream. Future studies using MLS data and numerical modeling will lead to better understanding of gravity wave effects on dynamics and chemistry in the middle atmosphere.

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE