skip to content
Numerical simulation of thunderstorm gust fronts Preview this item
ClosePreview this item
Checking...

Numerical simulation of thunderstorm gust fronts

Author: Keith L Seitter; U.S. Air Force Geophysics Laboratory. Atmospheric Sciences Division.
Publisher: Hanscom AFB, Massachusetts : Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, 1983.
Series: AFGL-TR, 83-329.; Environmental research papers (Hanscom AFB, Mass.), no. 862.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
The thunderstorm gust front is an important feature for both the maintenance and initiation of storms. Previous studies have shown that the thunderstorm outflow producing the gust front can be treated as an atmospheric density current to a good approximation. In this study, a new version of the density current speed equation, based on the surface pressure rise, is derived. This equation is shown to give much better  Read more...
Rating:

(not yet rated) 0 with reviews - Be the first.

Subjects
More like this

Find a copy in the library

&AllPage.SpinnerRetrieving; Finding libraries that hold this item...

Details

Additional Physical Format: Online version:
Seitter, Keith L.
Numerical simulation of thunderstorm gust fronts
(OCoLC)1045074595
Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Keith L Seitter; U.S. Air Force Geophysics Laboratory. Atmospheric Sciences Division.
OCLC Number: 10868339
Notes: Cover title.
Distributed to depository libraries in microfiche.
"13 December 1983."
Description: 34 pages : illustrations ; 28 cm.
Series Title: AFGL-TR, 83-329.; Environmental research papers (Hanscom AFB, Mass.), no. 862.
Other Titles: Technical Report Archive & Image Library (TRAIL)
Responsibility: Keith L. Seitter.

Abstract:

The thunderstorm gust front is an important feature for both the maintenance and initiation of storms. Previous studies have shown that the thunderstorm outflow producing the gust front can be treated as an atmospheric density current to a good approximation. In this study, a new version of the density current speed equation, based on the surface pressure rise, is derived. This equation is shown to give much better results than other commonly used forms when applied to twenty previously reported gust front observations. A two-dimensional numerical model is used to investigate the dynamics of atmospheric density currents. Simulations with this model show the effects of the environmental wind relative to the storm and the wind shear on the propagation of the gust front and the depth of the thunderstorm outflow. The results of these simulations are discussed in terms of the conditions necessary for the gust front to remain in a position that is beneficial for the maintenance of the storm. Moist processes are included in the model and simulations are made to investigate atmospheric density current propagation through a moist atmosphere. The lifting that occurs during gust front passage is calculated and it is found that even when this lifting is sufficient to bring moist parcels above their level of free convection; deep convection is prohibited by other aspects of the circulation. The generation of an arc cloud by the gust front is found to result in a less intense and slower gust front compared to an outflow that did not produce an arc cloud. This result is interpreted in terms of the gust front speed equation based on the surface pressure rise.

Reviews

User-contributed reviews
Retrieving GoodReads reviews...
Retrieving DOGObooks reviews...

Tags

Be the first.
Confirm this request

You may have already requested this item. Please select Ok if you would like to proceed with this request anyway.

Linked Data


Primary Entity

<http://www.worldcat.org/oclc/10868339> # Numerical simulation of thunderstorm gust fronts
    a schema:Book, schema:CreativeWork ;
   library:oclcnum "10868339" ;
   library:placeOfPublication <http://id.loc.gov/vocabulary/countries/mau> ;
   rdfs:seeAlso <http://experiment.worldcat.org/entity/work/data/3161656#CreativeWork/technical_report_archive_&_image_library_trail> ; # Technical Report Archive & Image Library (TRAIL)
   schema:about <http://id.worldcat.org/fast/820542> ; # Atmospheric turbulence
   schema:about <http://experiment.worldcat.org/entity/work/data/3161656#Topic/thunderstorms_united_states> ; # Thunderstorms--United States
   schema:about <http://id.worldcat.org/fast/1150494> ; # Thunderstorms
   schema:about <http://id.worldcat.org/fast/949518> ; # Gust loads
   schema:about <http://id.worldcat.org/fast/1204155> ; # United States.
   schema:bookFormat bgn:PrintBook ;
   schema:contributor <http://viaf.org/viaf/143117229> ; # U.S. Air Force Geophysics Laboratory. Atmospheric Sciences Division.
   schema:creator <http://viaf.org/viaf/65408855> ; # Keith L. Seitter
   schema:datePublished "1983" ;
   schema:description "The thunderstorm gust front is an important feature for both the maintenance and initiation of storms. Previous studies have shown that the thunderstorm outflow producing the gust front can be treated as an atmospheric density current to a good approximation. In this study, a new version of the density current speed equation, based on the surface pressure rise, is derived. This equation is shown to give much better results than other commonly used forms when applied to twenty previously reported gust front observations. A two-dimensional numerical model is used to investigate the dynamics of atmospheric density currents. Simulations with this model show the effects of the environmental wind relative to the storm and the wind shear on the propagation of the gust front and the depth of the thunderstorm outflow. The results of these simulations are discussed in terms of the conditions necessary for the gust front to remain in a position that is beneficial for the maintenance of the storm. Moist processes are included in the model and simulations are made to investigate atmospheric density current propagation through a moist atmosphere. The lifting that occurs during gust front passage is calculated and it is found that even when this lifting is sufficient to bring moist parcels above their level of free convection; deep convection is prohibited by other aspects of the circulation. The generation of an arc cloud by the gust front is found to result in a less intense and slower gust front compared to an outflow that did not produce an arc cloud. This result is interpreted in terms of the gust front speed equation based on the surface pressure rise."@en ;
   schema:exampleOfWork <http://worldcat.org/entity/work/id/3161656> ;
   schema:genre "National government publication"@en ;
   schema:genre "Government publication"@en ;
   schema:inLanguage "en" ;
   schema:isPartOf <http://experiment.worldcat.org/entity/work/data/3161656#Series/afgl_tr> ; # AFGL-TR ;
   schema:isPartOf <http://experiment.worldcat.org/entity/work/data/3161656#Series/environmental_research_papers> ; # Environmental research papers ;
   schema:isPartOf <http://experiment.worldcat.org/entity/work/data/3161656#Series/environmental_research_papers_hanscom_afb_mass> ; # Environmental research papers (Hanscom AFB, Mass.) ;
   schema:isSimilarTo <http://www.worldcat.org/oclc/1045074595> ;
   schema:name "Numerical simulation of thunderstorm gust fronts"@en ;
   schema:productID "10868339" ;
   wdrs:describedby <http://www.worldcat.org/title/-/oclc/10868339> ;
    .


Related Entities

<http://experiment.worldcat.org/entity/work/data/3161656#CreativeWork/technical_report_archive_&_image_library_trail> # Technical Report Archive & Image Library (TRAIL)
    a schema:CreativeWork ;
   schema:name "Technical Report Archive & Image Library (TRAIL)" ;
    .

<http://experiment.worldcat.org/entity/work/data/3161656#Series/afgl_tr> # AFGL-TR ;
    a bgn:PublicationSeries ;
   schema:hasPart <http://www.worldcat.org/oclc/10868339> ; # Numerical simulation of thunderstorm gust fronts
   schema:name "AFGL-TR ;" ;
    .

<http://experiment.worldcat.org/entity/work/data/3161656#Series/environmental_research_papers> # Environmental research papers ;
    a bgn:PublicationSeries ;
   schema:hasPart <http://www.worldcat.org/oclc/10868339> ; # Numerical simulation of thunderstorm gust fronts
   schema:name "Environmental research papers ;" ;
    .

<http://experiment.worldcat.org/entity/work/data/3161656#Series/environmental_research_papers_hanscom_afb_mass> # Environmental research papers (Hanscom AFB, Mass.) ;
    a bgn:PublicationSeries ;
   schema:hasPart <http://www.worldcat.org/oclc/10868339> ; # Numerical simulation of thunderstorm gust fronts
   schema:name "Environmental research papers (Hanscom AFB, Mass.) ;" ;
    .

<http://id.worldcat.org/fast/1150494> # Thunderstorms
    a schema:Intangible ;
   schema:name "Thunderstorms"@en ;
    .

<http://id.worldcat.org/fast/1204155> # United States.
    a schema:Place ;
   schema:name "United States." ;
    .

<http://id.worldcat.org/fast/820542> # Atmospheric turbulence
    a schema:Intangible ;
   schema:name "Atmospheric turbulence"@en ;
    .

<http://id.worldcat.org/fast/949518> # Gust loads
    a schema:Intangible ;
   schema:name "Gust loads"@en ;
    .

<http://viaf.org/viaf/143117229> # U.S. Air Force Geophysics Laboratory. Atmospheric Sciences Division.
    a schema:Organization ;
   schema:name "U.S. Air Force Geophysics Laboratory. Atmospheric Sciences Division." ;
    .

<http://viaf.org/viaf/65408855> # Keith L. Seitter
    a schema:Person ;
   schema:familyName "Seitter" ;
   schema:givenName "Keith L." ;
   schema:name "Keith L. Seitter" ;
    .

<http://www.worldcat.org/oclc/1045074595>
    a schema:CreativeWork ;
   rdfs:label "Numerical simulation of thunderstorm gust fronts" ;
   schema:description "Online version:" ;
   schema:isSimilarTo <http://www.worldcat.org/oclc/10868339> ; # Numerical simulation of thunderstorm gust fronts
    .


Content-negotiable representations

Close Window

Please sign in to WorldCat 

Don't have an account? You can easily create a free account.