Measurements of gravity wave activity within and around the Arctic stratospheric vortex

Whiteway, J.; Duck, Thomas J.; Donovan, D. P.; Bird, J. C.; Pal, S. R.; Carswell, A. I.

doi:10.1029/97gl01322

Cited by 87 publications

(108 citation statements)

References 15 publications

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“…Yoshiki et al (2004) investigated the 25 temporal variation of the gravity wave energy in the lower stratosphere with respect to the position of the polar vortex by using the equivalent latitude coordinate for the Antarctic station Syowa (69°S, 40°E). In agreement with the results of Whiteway et al (1997), gravity wave energy is enhanced when the edge of the polar vortex approaches Syowa Station. Surprisingly, they found an especially large enhancement during the breakdown phase of the polar vortex in spring.…”

Section: Introductionsupporting

confidence: 80%

“…The observations of Whiteway 15 at Eureka, Nunavut, Canada (80°N) during four Arctic winters showed an increase of stratospheric gravity wave energy in the vicinity of the PNJ. More precisely, the amount of upper stratospheric wave energy was maximum within the PNJ at the edge of the polar vortex, minimum near the vortex center, and intermediate outside the vortex (Whiteway et al, 1997). Yoshiki and Sato (2000) analyzed radiosonde observations from 33 polar stations over a period of 10 years to investigate gravity waves in the lower stratosphere, inter alia by examining the correlation between the gravity wave intensity 20 (expressed as kinetic energy E K ) in the lower stratosphere and the mean wind.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the existing studies concentrate on statistical aspects derived from high-vertical resolution radiosondes (e.g., Yoshiki and Sato, 2000;Yoshiki et al, 2004), from ground-based (e.g., Whiteway et al, 1997, Whiteway and Duck, 1999, Khaykin et al, 2015 and space-borne (e.g., Waters, 1996, Hindley et al, 2015) remote-sensing observations. The observations of Whiteway 15 at Eureka, Nunavut, Canada (80°N) during four Arctic winters showed an increase of stratospheric gravity wave energy in the vicinity of the PNJ.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gravity Waves excited during a Minor Sudden Stratospheric Warming

Dörnbrack¹,

Gisinger²,

Kaifler³

et al. 2018

Preprint

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Section: Introductionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gravity Waves excited during a Minor Sudden Stratospheric Warming

Dörnbrack¹,

Gisinger²,

Kaifler³

et al. 2018

Preprint

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“…Gravity wave activity in the polar region is related to the position of the stratospheric polar vortex [Whiteway et al, 1997] and maximizes when the station locates at the edge of the vortex. On the other hand, minimum in wave activity is observed when the station is on the inside of the vortex.…”

Section: Introductionmentioning

confidence: 99%

A statistical study of gravity waves in the polar regions based on operational radiosonde data

Yoshiki¹,

Sato²

2000

J. Geophys. Res.

121

184

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Abstract. Gravity waves in the lower polar stratosphere are examined using operational radiosonde observations gathered from 33 stations over a period of 10 years. Both the potential and kinetic energies of the gravity waves vary annually and reach maxima in winter in the Arctic and in spring in the Antarctic. In the Antarctic spring a region of large gravity wave energy propagates downward following the movement of a zone of high static stability associated with Southern Hemispheric warming. Moreover, the enhanced energy region and the high stability zone coincide in the horizontal plane and move gradually from 135øE, 50øS to 45øW, 70øS over the South Pole. The vertical and horizontal directions of wave propagation are examined using hodograph analysis in the vertical. Most gravity waves transfer energy upward in the Arctic, while the percentage of downward energy propagation is relatively high in winter and spring in the Antarctic. Horizontally, gravity waves propagate westward relative to the mean wind in the Arctic, while in the Antarctic the dominant direction varies from station to station. The correlation between gravity wave energy in the lower stratosphere and the mean wind is also examined. In the Arctic, gravity wave energy is highly correlated with the surface wind, though in the Antarctic it correlates with the stratospheric wind. These results suggest that gravity waves observed in the Arctic are forced by topography, whereas in Antarctica some sources may exist in the stratosphere. One such source candidate is likely to be the polar night jet.

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“…On the observational front, various techniques including radar [e.g., Tsuda et al, 1989;Fritts et al, 1990], rocketsonde [Hamilton, 1991;Eckermann et al, 1994], radiosonde [Allen and Vincent, 1995;Vincent et al, 1997;Wang and Geller, 2003], aircraft [Nastrom et al, 1987;Jasperson et al, 1990;Nastrom and Fritts, 1992], and lidar [Mitchell et al, 1996;Whiteway et al, 1997;Sivakumar et al, 2006] were widely used to determine the morphology of gravity waves. Wang and Geller [2003] used a large database of radiosondederived wind and temperature with high vertical resolution from more than 90 stations in American territories including those in the tropical Pacific to develop climatology of gravity wave energy in the troposphere and lower stratosphere.…”

Section: Introductionmentioning

confidence: 99%

CHAMP observations of global gravity wave fields in the troposphere and stratosphere

et al. 2008

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[1] This paper presents the analysis of 56 months of CHAMP (Challenging Minisatellite Payload) RO (radio occultation) temperature profiles to study the global gravity wave fields in the troposphere and lower stratosphere. The relatively new GPS (Global Positioning System) RO technique is suitable for global monitoring and provides high vertical resolution, long-term stability, and opportunity of all-weather viewing. The CHAMP data set analyzed in this paper is the largest RO data set used for the investigation of global structure of gravity waves. The analysis also makes use of the global radiosonde data provided by the British Atmospheric Data Centre (BADC). First, the global winter temperature pattern and temperature fluctuations in the troposphere and lower stratosphere are discussed. The global structure of gravity wave variances in the upper troposphere and lower stratosphere for the summer and winter seasons indicate the dominance in the tropical region. The analysis reveals that the maximum potential energy (E p ) is observed around the equator with considerable longitudinal variation. Comparison of the wave energy derived from the CHAMP and radiosonde data sets for the low-latitude region (20°S-20°N) shows good similarity. The observed vertical wave number power spectra were compared with a model spectrum. The low-latitude power spectra show considerable similarities with the model spectrum. However, the disparity increases in the midlatitude or high-latitude sectors; particularly, in the high latitudes the observed spectral power is much underestimated for longer wavelengths. The results demonstrate the usefulness of GPS RO data in determining the global gravity wave fields.

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Measurements of gravity wave activity within and around the Arctic stratospheric vortex

Cited by 87 publications

References 15 publications

Gravity Waves excited during a Minor Sudden Stratospheric Warming

Gravity Waves excited during a Minor Sudden Stratospheric Warming

A statistical study of gravity waves in the polar regions based on operational radiosonde data

CHAMP observations of global gravity wave fields in the troposphere and stratosphere

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