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Title: A year of internal Poincaré waves in southern Lake Michigan: YEAR OF LM P WAVES
Award ID(s):
1030842
NSF-PAR ID:
10092047
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
Journal of Geophysical Research: Oceans
Volume:
117
Issue:
C7
ISSN:
0148-0227
Page Range / eLocation ID:
n/a to n/a
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    The seasonal and height dependencies of the orographic primary and larger‐scale secondary gravity waves (GWs) have been studied using the temperature profiles measured by Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) from 2002 to 2017. At ~40°S and during Southern Hemisphere winter, there is a strong GW peak over the Andes mountains that extend toz ~ 55 km. Using wind and topographic data, we show that orographic GWs break above the peak height of the stratospheric jet. Atz ~ 55–65 km, GW breaking and momentum deposition create body forces that generate larger‐scale secondary GWs; we show that these latter GWs form a wide peak above 65 km with a westward tilt. At middle latitudes during summer in the respective hemisphere, orographic GW breaking also generates larger‐scale secondary GWs that propagate to higher altitudes. Both orographic primary and larger‐scale secondary GWs are likely responsible for most of the non‐equatorial peaks of the persistent global distribution of GWs in SABER.

     
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