Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex
Measurements from the NOAA G4 research aircraft and high-resolution numerical simulations are used to study the evolution and dynamics of a large-amplitude gravity wave event over Greenland that took place on 29 January 1997 during the Fronts and Atlantic Storm-Track Experiment (FASTEX). Vertical cr...
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ftdtic:ADA350189 2023-05-15T16:27:00+02:00 Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex Doyle, James D. Sharpiro, M. A. Gall, Robert Bartels, Diana NAVAL RESEARCH LAB MONTEREY CA 1997 text/html http://www.dtic.mil/docs/citations/ADA350189 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA350189 en eng http://www.dtic.mil/docs/citations/ADA350189 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Meteorology *GRAVITY WAVES COMPUTERIZED SIMULATION STORMS WIND VELOCITY RESEARCH AIRCRAFT GREENLAND FRONTS(METEOROLOGY) DROPSONDES *FASTEX(FRONTS AND ATLANTIC STORM TRACK EXPERIMENT) NOAA(NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION) DROPWINDSONDE DATA NOAA G-4 AIRCRAFT Text 1997 ftdtic 2016-02-19T23:45:17Z Measurements from the NOAA G4 research aircraft and high-resolution numerical simulations are used to study the evolution and dynamics of a large-amplitude gravity wave event over Greenland that took place on 29 January 1997 during the Fronts and Atlantic Storm-Track Experiment (FASTEX). Vertical cross section analyses of continuous flight-level and dropwindsonde data, with 50-km horizontal spacing, documented the presence of a large-amplitude breaking gravity wave extending from above the 180 hPa level to 500 hPa. The dropwindsonde data measured deep layers with isentropic overturning and an upshear tilt to the gravity wave. Flight-level data (^ 180 hPa or 12 km) indicate a horizontal shear of over 0.001/s across the breaking wave with 25 K potential temperature perturbations. The wind speed downstream of the breaking wave decreased by 30 m/s resulting in the reduction of the cross mountain flow to near zero with localized regions of flow reversal. Prepared in collaboration with NOAA/ERL Environmental Tech Lab., Boulder, CO., National Center for Atmospheric Research, Boulder, CO., and National Severe Storms Lab., Norman, OK. Text Greenland Defense Technical Information Center: DTIC Technical Reports database Greenland |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Meteorology *GRAVITY WAVES COMPUTERIZED SIMULATION STORMS WIND VELOCITY RESEARCH AIRCRAFT GREENLAND FRONTS(METEOROLOGY) DROPSONDES *FASTEX(FRONTS AND ATLANTIC STORM TRACK EXPERIMENT) NOAA(NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION) DROPWINDSONDE DATA NOAA G-4 AIRCRAFT |
spellingShingle |
Meteorology *GRAVITY WAVES COMPUTERIZED SIMULATION STORMS WIND VELOCITY RESEARCH AIRCRAFT GREENLAND FRONTS(METEOROLOGY) DROPSONDES *FASTEX(FRONTS AND ATLANTIC STORM TRACK EXPERIMENT) NOAA(NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION) DROPWINDSONDE DATA NOAA G-4 AIRCRAFT Doyle, James D. Sharpiro, M. A. Gall, Robert Bartels, Diana Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
topic_facet |
Meteorology *GRAVITY WAVES COMPUTERIZED SIMULATION STORMS WIND VELOCITY RESEARCH AIRCRAFT GREENLAND FRONTS(METEOROLOGY) DROPSONDES *FASTEX(FRONTS AND ATLANTIC STORM TRACK EXPERIMENT) NOAA(NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION) DROPWINDSONDE DATA NOAA G-4 AIRCRAFT |
description |
Measurements from the NOAA G4 research aircraft and high-resolution numerical simulations are used to study the evolution and dynamics of a large-amplitude gravity wave event over Greenland that took place on 29 January 1997 during the Fronts and Atlantic Storm-Track Experiment (FASTEX). Vertical cross section analyses of continuous flight-level and dropwindsonde data, with 50-km horizontal spacing, documented the presence of a large-amplitude breaking gravity wave extending from above the 180 hPa level to 500 hPa. The dropwindsonde data measured deep layers with isentropic overturning and an upshear tilt to the gravity wave. Flight-level data (^ 180 hPa or 12 km) indicate a horizontal shear of over 0.001/s across the breaking wave with 25 K potential temperature perturbations. The wind speed downstream of the breaking wave decreased by 30 m/s resulting in the reduction of the cross mountain flow to near zero with localized regions of flow reversal. Prepared in collaboration with NOAA/ERL Environmental Tech Lab., Boulder, CO., National Center for Atmospheric Research, Boulder, CO., and National Severe Storms Lab., Norman, OK. |
author2 |
NAVAL RESEARCH LAB MONTEREY CA |
format |
Text |
author |
Doyle, James D. Sharpiro, M. A. Gall, Robert Bartels, Diana |
author_facet |
Doyle, James D. Sharpiro, M. A. Gall, Robert Bartels, Diana |
author_sort |
Doyle, James D. |
title |
Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
title_short |
Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
title_full |
Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
title_fullStr |
Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
title_full_unstemmed |
Numerical Simulation of a Breaking Gravity Wave Event Over Greenland Observed During Fastex |
title_sort |
numerical simulation of a breaking gravity wave event over greenland observed during fastex |
publishDate |
1997 |
url |
http://www.dtic.mil/docs/citations/ADA350189 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA350189 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA350189 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766016035948855296 |