Seasonal variations of gravity waves revealed in rawinsonde data at Pohang, Korea

Hye-Yeong Chun, I. S. Song, J. J. Baik

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Seasonal variations of gravity wave characteristics are investigated using rawinsonde data observed at Pohang observatory, Korea (36°2′N, 129°23′E) during the one-year period of 1998. Analysis is carried out for two atmospheric layers representing the troposphere (2-9 km) and stratosphere (17-30 km). There exist clear seasonal variations in amplitudes of temperature and wind perturbations and wave energy in the stratosphere, with their maxima in wintertime and minima in summertime. A strong correlation is found between the wave activity and the strength of the jet stream, but there is no clear correlation between the wave activity and the vertical gradient of static stability. The intrinsic frequency and vertical and horizontal wavelengths of gravity waves in the stratosphere are 2f-3f, where f is the Coriolis parameter, and 2-3 km and 300-500 km, respectively. The intrinsic phase velocity directs westward in January and northeastward in July. The vertical flux of the stratospheric zonal momentum is mostly negative except in summertime with a maximum magnitude in January. Topography seems to be a major source of stratospheric gravity waves in wintertime. Convection can be a source of gravity waves in summertime, but it is required to know convective sources at nearby stations, due to their intermittency and locations relative to floating balloons.

Original languageEnglish
Pages (from-to)255-273
Number of pages19
JournalMeteorology and Atmospheric Physics
Volume93
Issue number3-4
DOIs
Publication statusPublished - 2006 Aug 1

Fingerprint

gravity wave
seasonal variation
stratosphere
jet stream
phase velocity
wave energy
troposphere
momentum
observatory
convection
perturbation
topography
wavelength
temperature

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

@article{9d0dfdb129fc48339b2a4a2a1ea2716b,
title = "Seasonal variations of gravity waves revealed in rawinsonde data at Pohang, Korea",
abstract = "Seasonal variations of gravity wave characteristics are investigated using rawinsonde data observed at Pohang observatory, Korea (36°2′N, 129°23′E) during the one-year period of 1998. Analysis is carried out for two atmospheric layers representing the troposphere (2-9 km) and stratosphere (17-30 km). There exist clear seasonal variations in amplitudes of temperature and wind perturbations and wave energy in the stratosphere, with their maxima in wintertime and minima in summertime. A strong correlation is found between the wave activity and the strength of the jet stream, but there is no clear correlation between the wave activity and the vertical gradient of static stability. The intrinsic frequency and vertical and horizontal wavelengths of gravity waves in the stratosphere are 2f-3f, where f is the Coriolis parameter, and 2-3 km and 300-500 km, respectively. The intrinsic phase velocity directs westward in January and northeastward in July. The vertical flux of the stratospheric zonal momentum is mostly negative except in summertime with a maximum magnitude in January. Topography seems to be a major source of stratospheric gravity waves in wintertime. Convection can be a source of gravity waves in summertime, but it is required to know convective sources at nearby stations, due to their intermittency and locations relative to floating balloons.",
author = "Hye-Yeong Chun and Song, {I. S.} and Baik, {J. J.}",
year = "2006",
month = "8",
day = "1",
doi = "10.1007/s00703-005-0164-5",
language = "English",
volume = "93",
pages = "255--273",
journal = "Meteorology and Atmospheric Physics",
issn = "0177-7971",
publisher = "Springer Wien",
number = "3-4",

}

Seasonal variations of gravity waves revealed in rawinsonde data at Pohang, Korea. / Chun, Hye-Yeong; Song, I. S.; Baik, J. J.

In: Meteorology and Atmospheric Physics, Vol. 93, No. 3-4, 01.08.2006, p. 255-273.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Seasonal variations of gravity waves revealed in rawinsonde data at Pohang, Korea

AU - Chun, Hye-Yeong

AU - Song, I. S.

AU - Baik, J. J.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - Seasonal variations of gravity wave characteristics are investigated using rawinsonde data observed at Pohang observatory, Korea (36°2′N, 129°23′E) during the one-year period of 1998. Analysis is carried out for two atmospheric layers representing the troposphere (2-9 km) and stratosphere (17-30 km). There exist clear seasonal variations in amplitudes of temperature and wind perturbations and wave energy in the stratosphere, with their maxima in wintertime and minima in summertime. A strong correlation is found between the wave activity and the strength of the jet stream, but there is no clear correlation between the wave activity and the vertical gradient of static stability. The intrinsic frequency and vertical and horizontal wavelengths of gravity waves in the stratosphere are 2f-3f, where f is the Coriolis parameter, and 2-3 km and 300-500 km, respectively. The intrinsic phase velocity directs westward in January and northeastward in July. The vertical flux of the stratospheric zonal momentum is mostly negative except in summertime with a maximum magnitude in January. Topography seems to be a major source of stratospheric gravity waves in wintertime. Convection can be a source of gravity waves in summertime, but it is required to know convective sources at nearby stations, due to their intermittency and locations relative to floating balloons.

AB - Seasonal variations of gravity wave characteristics are investigated using rawinsonde data observed at Pohang observatory, Korea (36°2′N, 129°23′E) during the one-year period of 1998. Analysis is carried out for two atmospheric layers representing the troposphere (2-9 km) and stratosphere (17-30 km). There exist clear seasonal variations in amplitudes of temperature and wind perturbations and wave energy in the stratosphere, with their maxima in wintertime and minima in summertime. A strong correlation is found between the wave activity and the strength of the jet stream, but there is no clear correlation between the wave activity and the vertical gradient of static stability. The intrinsic frequency and vertical and horizontal wavelengths of gravity waves in the stratosphere are 2f-3f, where f is the Coriolis parameter, and 2-3 km and 300-500 km, respectively. The intrinsic phase velocity directs westward in January and northeastward in July. The vertical flux of the stratospheric zonal momentum is mostly negative except in summertime with a maximum magnitude in January. Topography seems to be a major source of stratospheric gravity waves in wintertime. Convection can be a source of gravity waves in summertime, but it is required to know convective sources at nearby stations, due to their intermittency and locations relative to floating balloons.

UR - http://www.scopus.com/inward/record.url?scp=33747425937&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33747425937&partnerID=8YFLogxK

U2 - 10.1007/s00703-005-0164-5

DO - 10.1007/s00703-005-0164-5

M3 - Article

VL - 93

SP - 255

EP - 273

JO - Meteorology and Atmospheric Physics

JF - Meteorology and Atmospheric Physics

SN - 0177-7971

IS - 3-4

ER -