Diurnal nonmigrating tides in the tropical lower thermosphere

Jeffrey M. Forbes, Maura E. Hagan, Saburo Miyahara, Yasunobu Miyoshi, Xiaoli Zhang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A comparison is performed between monthly-mean nonmigrating diurnal tide wind components at 95 km derived from Upper Atmosphere Research Satellite (UARS) wind observations, the Middle Atmosphere Circulation Model at Kyushu University (MACMKU), and the Global Scale Wave Model (GSWM) driven by latent heating due to deep tropical convection. A degree of overall agreement is obtained in the sense that annual-mean spectra at 95 km indicate that the UARS data, MACMKU and GSWM all share the same nonmigrating tide components (eastward-propagating with zonal wavenumber s = -3; westward-propagating with s = -2; standing or zonally-symmetric with s = 0; DE3, DW2, D0) at about the same power level. In combination with the migrating tide these wave components give rise to significant longitude variability in the total diurnal tidal fields. Beyond the above model/measurement agreements, significant discrepancies remain between the latitudinal-seasonal structures delineated by models and observation. For MACMKU, some of these discrepancies may be related to the specifics of the convective parameterization that is employed. Significant work remains to better delineate tropospheric forcing mechanisms and nonlinear wave-wave interactions as sources for nonmigrating tides.

Original languageEnglish
Pages (from-to)419-426
Number of pages8
Journalearth, planets and space
Volume55
Issue number7
DOIs
Publication statusPublished - Jan 1 2003

Fingerprint

thermosphere
tides
tide
middle atmosphere
Upper Atmosphere Research Satellite (UARS)
UARS
wave-wave interaction
nonlinear wave
wave interaction
longitude
parameterization
satellite data
convection
heating

All Science Journal Classification (ASJC) codes

  • Geology
  • Space and Planetary Science

Cite this

Diurnal nonmigrating tides in the tropical lower thermosphere. / Forbes, Jeffrey M.; Hagan, Maura E.; Miyahara, Saburo; Miyoshi, Yasunobu; Zhang, Xiaoli.

In: earth, planets and space, Vol. 55, No. 7, 01.01.2003, p. 419-426.

Research output: Contribution to journalArticle

Forbes, Jeffrey M. ; Hagan, Maura E. ; Miyahara, Saburo ; Miyoshi, Yasunobu ; Zhang, Xiaoli. / Diurnal nonmigrating tides in the tropical lower thermosphere. In: earth, planets and space. 2003 ; Vol. 55, No. 7. pp. 419-426.
@article{e61480eb2d414032837b32169ea76da9,
title = "Diurnal nonmigrating tides in the tropical lower thermosphere",
abstract = "A comparison is performed between monthly-mean nonmigrating diurnal tide wind components at 95 km derived from Upper Atmosphere Research Satellite (UARS) wind observations, the Middle Atmosphere Circulation Model at Kyushu University (MACMKU), and the Global Scale Wave Model (GSWM) driven by latent heating due to deep tropical convection. A degree of overall agreement is obtained in the sense that annual-mean spectra at 95 km indicate that the UARS data, MACMKU and GSWM all share the same nonmigrating tide components (eastward-propagating with zonal wavenumber s = -3; westward-propagating with s = -2; standing or zonally-symmetric with s = 0; DE3, DW2, D0) at about the same power level. In combination with the migrating tide these wave components give rise to significant longitude variability in the total diurnal tidal fields. Beyond the above model/measurement agreements, significant discrepancies remain between the latitudinal-seasonal structures delineated by models and observation. For MACMKU, some of these discrepancies may be related to the specifics of the convective parameterization that is employed. Significant work remains to better delineate tropospheric forcing mechanisms and nonlinear wave-wave interactions as sources for nonmigrating tides.",
author = "Forbes, {Jeffrey M.} and Hagan, {Maura E.} and Saburo Miyahara and Yasunobu Miyoshi and Xiaoli Zhang",
year = "2003",
month = "1",
day = "1",
doi = "10.1186/BF03351775",
language = "English",
volume = "55",
pages = "419--426",
journal = "Earth, Planets and Space",
issn = "1343-8832",
publisher = "Terra Scientific Publishing Company",
number = "7",

}

TY - JOUR

T1 - Diurnal nonmigrating tides in the tropical lower thermosphere

AU - Forbes, Jeffrey M.

AU - Hagan, Maura E.

AU - Miyahara, Saburo

AU - Miyoshi, Yasunobu

AU - Zhang, Xiaoli

PY - 2003/1/1

Y1 - 2003/1/1

N2 - A comparison is performed between monthly-mean nonmigrating diurnal tide wind components at 95 km derived from Upper Atmosphere Research Satellite (UARS) wind observations, the Middle Atmosphere Circulation Model at Kyushu University (MACMKU), and the Global Scale Wave Model (GSWM) driven by latent heating due to deep tropical convection. A degree of overall agreement is obtained in the sense that annual-mean spectra at 95 km indicate that the UARS data, MACMKU and GSWM all share the same nonmigrating tide components (eastward-propagating with zonal wavenumber s = -3; westward-propagating with s = -2; standing or zonally-symmetric with s = 0; DE3, DW2, D0) at about the same power level. In combination with the migrating tide these wave components give rise to significant longitude variability in the total diurnal tidal fields. Beyond the above model/measurement agreements, significant discrepancies remain between the latitudinal-seasonal structures delineated by models and observation. For MACMKU, some of these discrepancies may be related to the specifics of the convective parameterization that is employed. Significant work remains to better delineate tropospheric forcing mechanisms and nonlinear wave-wave interactions as sources for nonmigrating tides.

AB - A comparison is performed between monthly-mean nonmigrating diurnal tide wind components at 95 km derived from Upper Atmosphere Research Satellite (UARS) wind observations, the Middle Atmosphere Circulation Model at Kyushu University (MACMKU), and the Global Scale Wave Model (GSWM) driven by latent heating due to deep tropical convection. A degree of overall agreement is obtained in the sense that annual-mean spectra at 95 km indicate that the UARS data, MACMKU and GSWM all share the same nonmigrating tide components (eastward-propagating with zonal wavenumber s = -3; westward-propagating with s = -2; standing or zonally-symmetric with s = 0; DE3, DW2, D0) at about the same power level. In combination with the migrating tide these wave components give rise to significant longitude variability in the total diurnal tidal fields. Beyond the above model/measurement agreements, significant discrepancies remain between the latitudinal-seasonal structures delineated by models and observation. For MACMKU, some of these discrepancies may be related to the specifics of the convective parameterization that is employed. Significant work remains to better delineate tropospheric forcing mechanisms and nonlinear wave-wave interactions as sources for nonmigrating tides.

UR - http://www.scopus.com/inward/record.url?scp=20644445016&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20644445016&partnerID=8YFLogxK

U2 - 10.1186/BF03351775

DO - 10.1186/BF03351775

M3 - Article

AN - SCOPUS:20644445016

VL - 55

SP - 419

EP - 426

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1343-8832

IS - 7

ER -