Abstract
Previous studies have suggested that gravity waves can transport a significantly large amount of angular momentum away from tropical cyclones, as much as 10% of the core angular momentum per hour. These previous studies used the shallow-water equations to model gravity waves radiating outward from rapidly rotating inner-core asymmetries. This issue is reinvestigated with a three-dimensional, nonhydrostatic, linear model of the vortex-anelastic equations. The response of balanced, axisymmetric vortices modeled after tropical cyclones to rotating asymmetric heat sources is examined to assess angular momentum transport by gravity waves radiating away from the core region of the vortices. Calculations show that gravity waves do transport angular momentum away from the vortex core; however, the amount transported is several orders of magnitude smaller than recent estimates.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 117-135 |
| Number of pages | 19 |
| Journal | Journal of the Atmospheric Sciences |
| Volume | 67 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2010 |
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ASJC Scopus subject areas
- Atmospheric Science
Cite this
Do gravity waves transport angular momentum away from tropical cyclones? / Moon, Yumin; Nolan, David S.
In: Journal of the Atmospheric Sciences, Vol. 67, No. 1, 01.2010, p. 117-135.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Do gravity waves transport angular momentum away from tropical cyclones?
AU - Moon, Yumin
AU - Nolan, David S
PY - 2010/1
Y1 - 2010/1
N2 - Previous studies have suggested that gravity waves can transport a significantly large amount of angular momentum away from tropical cyclones, as much as 10% of the core angular momentum per hour. These previous studies used the shallow-water equations to model gravity waves radiating outward from rapidly rotating inner-core asymmetries. This issue is reinvestigated with a three-dimensional, nonhydrostatic, linear model of the vortex-anelastic equations. The response of balanced, axisymmetric vortices modeled after tropical cyclones to rotating asymmetric heat sources is examined to assess angular momentum transport by gravity waves radiating away from the core region of the vortices. Calculations show that gravity waves do transport angular momentum away from the vortex core; however, the amount transported is several orders of magnitude smaller than recent estimates.
AB - Previous studies have suggested that gravity waves can transport a significantly large amount of angular momentum away from tropical cyclones, as much as 10% of the core angular momentum per hour. These previous studies used the shallow-water equations to model gravity waves radiating outward from rapidly rotating inner-core asymmetries. This issue is reinvestigated with a three-dimensional, nonhydrostatic, linear model of the vortex-anelastic equations. The response of balanced, axisymmetric vortices modeled after tropical cyclones to rotating asymmetric heat sources is examined to assess angular momentum transport by gravity waves radiating away from the core region of the vortices. Calculations show that gravity waves do transport angular momentum away from the vortex core; however, the amount transported is several orders of magnitude smaller than recent estimates.
UR - http://www.scopus.com/inward/record.url?scp=77953314561&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953314561&partnerID=8YFLogxK
U2 - 10.1175/2009JAS3088.1
DO - 10.1175/2009JAS3088.1
M3 - Article
VL - 67
SP - 117
EP - 135
JO - Journals of the Atmospheric Sciences
JF - Journals of the Atmospheric Sciences
SN - 0022-4928
IS - 1
ER -