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Parallelization And Visual Analysis Of Multidimensional Fields by Karsten Schwan

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1NASA Technical Reports Server (NTRS) 19980004550: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions

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This final report has four sections. We first describe the actual scientific results attained by our research team, followed by a description of the high performance computing research enhancing those results and prompted by the scientific tasks being undertaken. Next, we describe our research in data and program visualization motivated by the scientific research and also enabling it. Last, we comment on the indirect effects this research effort has had on our work, in terms of follow up or additional funding, student training, etc.

“NASA Technical Reports Server (NTRS) 19980004550: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19980004550: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions
  • Author: ➤  
  • Language: English

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The book is available for download in "texts" format, the size of the file-s is: 15.64 Mbs, the file-s for this book were downloaded 56 times, the file-s went public at Fri Oct 14 2016.

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2NASA Technical Reports Server (NTRS) 19950006385: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions

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Atmospheric modeling is a grand challenge problem for several reasons, including its inordinate computational requirements and its generation of large amounts of data concurrent with its use of very large data sets derived from measurement instruments like satellites. In addition, atmospheric models are typically run several times, on new data sets or to reprocess existing data sets, to investigate or reinvestigate specific chemical or physical processes occurring in the earth's atmosphere, to understand model fidelity with respect to observational data, or simply to experiment with specific model parameters or components.

“NASA Technical Reports Server (NTRS) 19950006385: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19950006385: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions
  • Author: ➤  
  • Language: English

“NASA Technical Reports Server (NTRS) 19950006385: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Subjects and Themes:

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The book is available for download in "texts" format, the size of the file-s is: 41.79 Mbs, the file-s for this book were downloaded 46 times, the file-s went public at Fri Oct 07 2016.

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3Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions

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This final report has four sections. We first describe the actual scientific results attained by our research team, followed by a description of the high performance computing research enhancing those results and prompted by the scientific tasks being undertaken. Next, we describe our research in data and program visualization motivated by the scientific research and also enabling it. Last, we comment on the indirect effects this research effort has had on our work, in terms of follow up or additional funding, student training, etc.

“Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Metadata:

  • Title: ➤  Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions
  • Author:
  • Language: English

“Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Subjects and Themes:

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The book is available for download in "texts" format, the size of the file-s is: 3.39 Mbs, the file-s for this book were downloaded 260 times, the file-s went public at Mon May 23 2011.

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4NASA Technical Reports Server (NTRS) 19960015562: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions

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The three-dimensional, spectral transport model used in the current project was first successfully integrated over climatological time scales by Dr. Guang Ping Lou for the simulation of atmospheric N2O using the United Kingdom Meteorological Office (UKMO) 4-dimensional, assimilated wind and temperature data set. A non-parallel, FORTRAN version of this integration using a fairly simple N2O chemistry package containing only photo-chemical reactions was used to verify our initial parallel model results. The integrations reproduced the gross features of the observed stratospheric climatological N2O distributions but also simulated the structure of the stratospheric Antarctic vortex and its evolution. Subsequently, Dr. Thomas Kindler, who produced much of the parallel version of our model, enlarged the N2O model chemistry package to include N2O reactions involving O(D-1) and also introduced assimilated wind data from NASA as well as UKMO. Initially, transport calculations without chemistry were run using Carbon-14 as a non-reactive tracer gas with the result that large differences in the transport properties of the two assimilated wind data sets were apparent from the resultant Carbon-14 distributions. Subsequent calculations for N2O, including its chemistry, with the two input winds data sets with verification from UARS satellite observations have refined the transport differences between the two such that the model's steering capabilities could be used to infer the correct climatological vertical velocity fields required to support the N2O observations. During this process, it was also discovered that both the NASA and the UKMO data contained spurious values in some of the higher frequency wave components, leading to incorrect local transport calculations and ultimately affecting the large scale properties of the model's N2O distributions, particularly at tropical latitudes. Subsequent model runs with wind data that had been filtered to remove some of the high frequency components produced much more realistic N2O distributions. During the past few months, the UKMO wind data base for a complete two-year period was processed into spectral form for model use. This new version of the input transport data base now includes complete temperature fields as well as the necessary wind data. This was done to facilitate advanced chemical calculations in the parallel model which often depend upon temperature. Additional UKMO data is being added as it becomes available.

“NASA Technical Reports Server (NTRS) 19960015562: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19960015562: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions
  • Author: ➤  
  • Language: English

“NASA Technical Reports Server (NTRS) 19960015562: Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Subjects and Themes:

Edition Identifiers:

Downloads Information:

The book is available for download in "texts" format, the size of the file-s is: 21.86 Mbs, the file-s for this book were downloaded 57 times, the file-s went public at Thu Oct 13 2016.

Available formats:
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5Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions

By

The three-dimensional, spectral transport model used in the current project was first successfully integrated over climatological time scales by Dr. Guang Ping Lou for the simulation of atmospheric N2O using the United Kingdom Meteorological Office (UKMO) 4-dimensional, assimilated wind and temperature data set. A non-parallel, FORTRAN version of this integration using a fairly simple N2O chemistry package containing only photo-chemical reactions was used to verify our initial parallel model results. The integrations reproduced the gross features of the observed stratospheric climatological N2O distributions but also simulated the structure of the stratospheric Antarctic vortex and its evolution. Subsequently, Dr. Thomas Kindler, who produced much of the parallel version of our model, enlarged the N2O model chemistry package to include N2O reactions involving O(D-1) and also introduced assimilated wind data from NASA as well as UKMO. Initially, transport calculations without chemistry were run using Carbon-14 as a non-reactive tracer gas with the result that large differences in the transport properties of the two assimilated wind data sets were apparent from the resultant Carbon-14 distributions. Subsequent calculations for N2O, including its chemistry, with the two input winds data sets with verification from UARS satellite observations have refined the transport differences between the two such that the model's steering capabilities could be used to infer the correct climatological vertical velocity fields required to support the N2O observations. During this process, it was also discovered that both the NASA and the UKMO data contained spurious values in some of the higher frequency wave components, leading to incorrect local transport calculations and ultimately affecting the large scale properties of the model's N2O distributions, particularly at tropical latitudes. Subsequent model runs with wind data that had been filtered to remove some of the high frequency components produced much more realistic N2O distributions. During the past few months, the UKMO wind data base for a complete two-year period was processed into spectral form for model use. This new version of the input transport data base now includes complete temperature fields as well as the necessary wind data. This was done to facilitate advanced chemical calculations in the parallel model which often depend upon temperature. Additional UKMO data is being added as it becomes available.

“Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Metadata:

  • Title: ➤  Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions
  • Authors: ➤  
  • Language: English

“Parallelization And Visual Analysis Of Multidimensional Fields: Application To Ozone Production, Destruction, And Transport In Three Dimensions” Subjects and Themes:

Edition Identifiers:

Downloads Information:

The book is available for download in "texts" format, the size of the file-s is: 4.54 Mbs, the file-s for this book were downloaded 357 times, the file-s went public at Mon May 23 2011.

Available formats:
Abbyy GZ - Animated GIF - Archive BitTorrent - DjVu - DjVuTXT - Djvu XML - Item Tile - Metadata - Scandata - Single Page Processed JP2 ZIP - Text PDF -

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