Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen
A time-dependent generalization of a Fourier-ray method is presented and tested for fast numerical computation of high-resolution nonhydrostatic mountain-wave fields. The method is used to model mountain waves from Jan Mayen on 25 January 2000, a period when wavelike cloud banding was observed long...
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ftdtic:ADA523741 2023-05-15T16:57:00+02:00 Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen Eckermann, Stephen D. Broutman, Dave Ma, Jun Lindeman, John NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH 2006-01-20 text/html http://www.dtic.mil/docs/citations/ADA523741 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA523741 en eng http://www.dtic.mil/docs/citations/ADA523741 Approved for public release; distribution is unlimited. DTIC Theoretical Mathematics Photography *SATELLITE IMAGERY *FOURIER ANALYSIS *WAVES *SHORT WAVELENGTHS TOPOGRAPHY CLEAR AIR TURBULENCE FLOW RADIOSONDES RADIOMETERS GEOSTROPHIC WIND NORTH ATLANTIC OCEAN OROGRAPHY HIGH RESOLUTION TRAPPING(CHARGED PARTICLES) WEATHER ALGORITHMS REPRINTS *FOURIER-RAY MODELING *LEE WAVES INFRARED SATELLITE IMAGERY MOUNTAIN WAVES JAN MAYEN AVHRR-3(ADVANCED VERY HIGH RESOLUTION RADIOMETER VERSION 3) LIPPS-HEMLER OROGRAPHIC FLOW MODELS RVSM(REDUCED VERTICAL SEPARATION MINIMA) NWP(NUMERICAL WEATHER PREDICTION) MWFM(MOUNTAINWAVE FORECAST MODEL) Text 2006 ftdtic 2016-02-23T02:07:48Z A time-dependent generalization of a Fourier-ray method is presented and tested for fast numerical computation of high-resolution nonhydrostatic mountain-wave fields. The method is used to model mountain waves from Jan Mayen on 25 January 2000, a period when wavelike cloud banding was observed long distances downstream of the island by the Advanced Very High Resolution Radiometer Version 3 (AVHRR-3). Surface weather patterns show intensifying surface geostrophic winds over the island at 1200 UTC caused by rapid eastward passage of a compact low pressure system. The 1200 UTC wind profiles over the island increase with height to a jet maximum of approximately 60-70 m s(exp -1), yielding Scorer parameters that indicate vertical trapping of any short wavelength mountain waves. Separate Fourier-ray solutions were computed using high-resolution Jan Mayen orography and 1200 UTC vertical profiles of winds and temperatures over the island from a radiosonde sounding and an analysis system. The radiosonde-based simulations produce a purely diverging trapped wave solution that reproduces the salient features in the AVHRR-3 imagery. Differences in simulated wave patterns governed by the radiosonde and analysis profiles are explained in terms of resonant modes and are corroborated by spatial ray-group trajectories computed for wavenumbers along the resonant mode curves. Output from a nonlinear Lipps-Hemler orographic flow model also compares well with the Fourier-ray solution horizontally. Differences in vertical cross sections are ascribed to the Fourier-ray model's current omission of tunneling of trapped wave energy through evanescent layers. Published in Monthly Weather Review, v143 p2830-2848, Oct 2006. Text Jan Mayen North Atlantic Defense Technical Information Center: DTIC Technical Reports database Jan Mayen |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Theoretical Mathematics Photography *SATELLITE IMAGERY *FOURIER ANALYSIS *WAVES *SHORT WAVELENGTHS TOPOGRAPHY CLEAR AIR TURBULENCE FLOW RADIOSONDES RADIOMETERS GEOSTROPHIC WIND NORTH ATLANTIC OCEAN OROGRAPHY HIGH RESOLUTION TRAPPING(CHARGED PARTICLES) WEATHER ALGORITHMS REPRINTS *FOURIER-RAY MODELING *LEE WAVES INFRARED SATELLITE IMAGERY MOUNTAIN WAVES JAN MAYEN AVHRR-3(ADVANCED VERY HIGH RESOLUTION RADIOMETER VERSION 3) LIPPS-HEMLER OROGRAPHIC FLOW MODELS RVSM(REDUCED VERTICAL SEPARATION MINIMA) NWP(NUMERICAL WEATHER PREDICTION) MWFM(MOUNTAINWAVE FORECAST MODEL) |
spellingShingle |
Theoretical Mathematics Photography *SATELLITE IMAGERY *FOURIER ANALYSIS *WAVES *SHORT WAVELENGTHS TOPOGRAPHY CLEAR AIR TURBULENCE FLOW RADIOSONDES RADIOMETERS GEOSTROPHIC WIND NORTH ATLANTIC OCEAN OROGRAPHY HIGH RESOLUTION TRAPPING(CHARGED PARTICLES) WEATHER ALGORITHMS REPRINTS *FOURIER-RAY MODELING *LEE WAVES INFRARED SATELLITE IMAGERY MOUNTAIN WAVES JAN MAYEN AVHRR-3(ADVANCED VERY HIGH RESOLUTION RADIOMETER VERSION 3) LIPPS-HEMLER OROGRAPHIC FLOW MODELS RVSM(REDUCED VERTICAL SEPARATION MINIMA) NWP(NUMERICAL WEATHER PREDICTION) MWFM(MOUNTAINWAVE FORECAST MODEL) Eckermann, Stephen D. Broutman, Dave Ma, Jun Lindeman, John Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
topic_facet |
Theoretical Mathematics Photography *SATELLITE IMAGERY *FOURIER ANALYSIS *WAVES *SHORT WAVELENGTHS TOPOGRAPHY CLEAR AIR TURBULENCE FLOW RADIOSONDES RADIOMETERS GEOSTROPHIC WIND NORTH ATLANTIC OCEAN OROGRAPHY HIGH RESOLUTION TRAPPING(CHARGED PARTICLES) WEATHER ALGORITHMS REPRINTS *FOURIER-RAY MODELING *LEE WAVES INFRARED SATELLITE IMAGERY MOUNTAIN WAVES JAN MAYEN AVHRR-3(ADVANCED VERY HIGH RESOLUTION RADIOMETER VERSION 3) LIPPS-HEMLER OROGRAPHIC FLOW MODELS RVSM(REDUCED VERTICAL SEPARATION MINIMA) NWP(NUMERICAL WEATHER PREDICTION) MWFM(MOUNTAINWAVE FORECAST MODEL) |
description |
A time-dependent generalization of a Fourier-ray method is presented and tested for fast numerical computation of high-resolution nonhydrostatic mountain-wave fields. The method is used to model mountain waves from Jan Mayen on 25 January 2000, a period when wavelike cloud banding was observed long distances downstream of the island by the Advanced Very High Resolution Radiometer Version 3 (AVHRR-3). Surface weather patterns show intensifying surface geostrophic winds over the island at 1200 UTC caused by rapid eastward passage of a compact low pressure system. The 1200 UTC wind profiles over the island increase with height to a jet maximum of approximately 60-70 m s(exp -1), yielding Scorer parameters that indicate vertical trapping of any short wavelength mountain waves. Separate Fourier-ray solutions were computed using high-resolution Jan Mayen orography and 1200 UTC vertical profiles of winds and temperatures over the island from a radiosonde sounding and an analysis system. The radiosonde-based simulations produce a purely diverging trapped wave solution that reproduces the salient features in the AVHRR-3 imagery. Differences in simulated wave patterns governed by the radiosonde and analysis profiles are explained in terms of resonant modes and are corroborated by spatial ray-group trajectories computed for wavenumbers along the resonant mode curves. Output from a nonlinear Lipps-Hemler orographic flow model also compares well with the Fourier-ray solution horizontally. Differences in vertical cross sections are ascribed to the Fourier-ray model's current omission of tunneling of trapped wave energy through evanescent layers. Published in Monthly Weather Review, v143 p2830-2848, Oct 2006. |
author2 |
NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH |
format |
Text |
author |
Eckermann, Stephen D. Broutman, Dave Ma, Jun Lindeman, John |
author_facet |
Eckermann, Stephen D. Broutman, Dave Ma, Jun Lindeman, John |
author_sort |
Eckermann, Stephen D. |
title |
Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
title_short |
Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
title_full |
Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
title_fullStr |
Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
title_full_unstemmed |
Fourier-Ray Modeling of Short-Wavelength Trapped Lee Waves Observed in Infrared Satellite Imagery Near Jan Mayen |
title_sort |
fourier-ray modeling of short-wavelength trapped lee waves observed in infrared satellite imagery near jan mayen |
publishDate |
2006 |
url |
http://www.dtic.mil/docs/citations/ADA523741 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA523741 |
geographic |
Jan Mayen |
geographic_facet |
Jan Mayen |
genre |
Jan Mayen North Atlantic |
genre_facet |
Jan Mayen North Atlantic |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA523741 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766048255673630720 |