View in EDS PDF Full Text

ACCESS-TC: Vortex Specification, 4DVAR Initialization, Verification, and Structure Diagnostics.

Saved in:
Bibliographic Details
Title: ACCESS-TC: Vortex Specification, 4DVAR Initialization, Verification, and Structure Diagnostics.
Authors: Davidson, Noel E., Xiao, Yi, Ma, Yimin, Weber, Harry C., Sun, Xudong, Rikus, Lawrie J., Kepert, Jeff D., Steinle, Peter X., Dietachmayer, Gary S., Lok, Charlie C. F., Fraser, James, Fernon, Joan, Shaik, Hakeem
Source: Monthly Weather Review. Mar2014, Vol. 142 Issue 3, p1265-1289. 25p. 4 Charts, 13 Graphs, 3 Maps.
Subjects: Tropical cyclones, Computer simulation of weather forecasting, Rainfall simulators, Meteorology, Tropical storms
Geographic Terms: Australia
Abstract: The Australian Community Climate and Earth System Simulator (ACCESS) has been adapted for operational and research applications on tropical cyclones. The base system runs at a resolution of 0.11° and 50 levels. The domain is relocatable and nested in coarser-resolution ACCESS forecasts. Initialization consists of five cycles of four-dimensional variational data assimilation (4DVAR) over 24 h. Forecasts to 72 h are made. Without vortex specification, initial conditions usually contain a weak and misplaced circulation pattern. Significant effort has been devoted to building physically based, synthetic inner-core structures, validated using historical dropsonde data and surface analyses from the Atlantic. Based on estimates of central pressure and storm size, vortex specification is used to filter the analyzed circulation from the original analysis, construct an inner core of the storm, locate it to the observed position, and merge it with the large-scale analysis at outer radii. Using all available conventional observations and only synthetic surface pressure observations from the idealized vortex to correct the initial location and structure of the storm, the 4DVAR builds a balanced, intense 3D vortex with maximum wind at the radius of maximum wind and with a well-developed secondary circulation. Mean track and intensity errors for Australian region and northwest Pacific storms have been encouraging, as are recent real-time results from the Australian National Meteorological and Oceanographic Centre. The system became fully operational in November 2011. From preliminary diagnostics, some interesting structure change features are illustrated. Current limitations, future enhancements, and research applications are also discussed. [ABSTRACT FROM AUTHOR]
Copyright of Monthly Weather Review is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Links:
  – Type: pdflink
Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 94740646
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: ACCESS-TC: Vortex Specification, 4DVAR Initialization, Verification, and Structure Diagnostics.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Davidson%2C+Noel+E%2E%22">Davidson, Noel E.</searchLink><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Yi%22">Xiao, Yi</searchLink><br /><searchLink fieldCode="AR" term="%22Ma%2C+Yimin%22">Ma, Yimin</searchLink><br /><searchLink fieldCode="AR" term="%22Weber%2C+Harry+C%2E%22">Weber, Harry C.</searchLink><br /><searchLink fieldCode="AR" term="%22Sun%2C+Xudong%22">Sun, Xudong</searchLink><br /><searchLink fieldCode="AR" term="%22Rikus%2C+Lawrie+J%2E%22">Rikus, Lawrie J.</searchLink><br /><searchLink fieldCode="AR" term="%22Kepert%2C+Jeff+D%2E%22">Kepert, Jeff D.</searchLink><br /><searchLink fieldCode="AR" term="%22Steinle%2C+Peter+X%2E%22">Steinle, Peter X.</searchLink><br /><searchLink fieldCode="AR" term="%22Dietachmayer%2C+Gary+S%2E%22">Dietachmayer, Gary S.</searchLink><br /><searchLink fieldCode="AR" term="%22Lok%2C+Charlie+C%2E+F%2E%22">Lok, Charlie C. F.</searchLink><br /><searchLink fieldCode="AR" term="%22Fraser%2C+James%22">Fraser, James</searchLink><br /><searchLink fieldCode="AR" term="%22Fernon%2C+Joan%22">Fernon, Joan</searchLink><br /><searchLink fieldCode="AR" term="%22Shaik%2C+Hakeem%22">Shaik, Hakeem</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Monthly+Weather+Review%22">Monthly Weather Review</searchLink>. Mar2014, Vol. 142 Issue 3, p1265-1289. 25p. 4 Charts, 13 Graphs, 3 Maps.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Tropical+cyclones%22">Tropical cyclones</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation+of+weather+forecasting%22">Computer simulation of weather forecasting</searchLink><br /><searchLink fieldCode="DE" term="%22Rainfall+simulators%22">Rainfall simulators</searchLink><br /><searchLink fieldCode="DE" term="%22Meteorology%22">Meteorology</searchLink><br /><searchLink fieldCode="DE" term="%22Tropical+storms%22">Tropical storms</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Australia%22">Australia</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Australian Community Climate and Earth System Simulator (ACCESS) has been adapted for operational and research applications on tropical cyclones. The base system runs at a resolution of 0.11° and 50 levels. The domain is relocatable and nested in coarser-resolution ACCESS forecasts. Initialization consists of five cycles of four-dimensional variational data assimilation (4DVAR) over 24 h. Forecasts to 72 h are made. Without vortex specification, initial conditions usually contain a weak and misplaced circulation pattern. Significant effort has been devoted to building physically based, synthetic inner-core structures, validated using historical dropsonde data and surface analyses from the Atlantic. Based on estimates of central pressure and storm size, vortex specification is used to filter the analyzed circulation from the original analysis, construct an inner core of the storm, locate it to the observed position, and merge it with the large-scale analysis at outer radii. Using all available conventional observations and only synthetic surface pressure observations from the idealized vortex to correct the initial location and structure of the storm, the 4DVAR builds a balanced, intense 3D vortex with maximum wind at the radius of maximum wind and with a well-developed secondary circulation. Mean track and intensity errors for Australian region and northwest Pacific storms have been encouraging, as are recent real-time results from the Australian National Meteorological and Oceanographic Centre. The system became fully operational in November 2011. From preliminary diagnostics, some interesting structure change features are illustrated. Current limitations, future enhancements, and research applications are also discussed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Monthly Weather Review is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=94740646
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1175/MWR-D-13-00062.1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 25
        StartPage: 1265
    Subjects:
      – SubjectFull: Tropical cyclones
        Type: general
      – SubjectFull: Computer simulation of weather forecasting
        Type: general
      – SubjectFull: Rainfall simulators
        Type: general
      – SubjectFull: Meteorology
        Type: general
      – SubjectFull: Tropical storms
        Type: general
      – SubjectFull: Australia
        Type: general
    Titles:
      – TitleFull: ACCESS-TC: Vortex Specification, 4DVAR Initialization, Verification, and Structure Diagnostics.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Davidson, Noel E.
      – PersonEntity:
          Name:
            NameFull: Xiao, Yi
      – PersonEntity:
          Name:
            NameFull: Ma, Yimin
      – PersonEntity:
          Name:
            NameFull: Weber, Harry C.
      – PersonEntity:
          Name:
            NameFull: Sun, Xudong
      – PersonEntity:
          Name:
            NameFull: Rikus, Lawrie J.
      – PersonEntity:
          Name:
            NameFull: Kepert, Jeff D.
      – PersonEntity:
          Name:
            NameFull: Steinle, Peter X.
      – PersonEntity:
          Name:
            NameFull: Dietachmayer, Gary S.
      – PersonEntity:
          Name:
            NameFull: Lok, Charlie C. F.
      – PersonEntity:
          Name:
            NameFull: Fraser, James
      – PersonEntity:
          Name:
            NameFull: Fernon, Joan
      – PersonEntity:
          Name:
            NameFull: Shaik, Hakeem
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 03
              Text: Mar2014
              Type: published
              Y: 2014
          Identifiers:
            – Type: issn-print
              Value: 00270644
          Numbering:
            – Type: volume
              Value: 142
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Monthly Weather Review
              Type: main
ResultId 1