Research Catalog

On the estimation of areal windspeed distribution in tropical cyclones with the use of satellite data.

Title
On the estimation of areal windspeed distribution in tropical cyclones with the use of satellite data.
Author
Timchalk, Andrew
Publication
Washington, D.C. : National Environmental Satellite Service, 1976.

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Details

Additional Authors
  • Meteorological Satellite Laboratory (U.S.)
  • United States. National Environmental Satellite Service.
  • United States. National Oceanic and Atmospheric Administration, issuing agency.
Description
viii, 41 pages : illustrations; 26 cm.
Summary
This paper is an attempt to determine whether the areal windspeed distributions in tropical cyclones can be estimated by use of two satellite data parameters: (1) the low-level convective cloud band crossing angle relative to tangents to concentric circles centered on the eye, (2) the infrared temperatures from the 10.5-to-12.5 mu m channel. These two parameters plus the "ground truth" winds were all derived for 128 polar coordinate grid points (16 azimuths and 8 radii). Coincident values of the variables were evaluated statistically first by linear regression and afterward by multiple screening regression. For the entire storm area (all radii), the correlation between observed windspeed and the two satellite-derived parameters [(1) and (2), above] was 0.4 and -0.6, respectively. However, when evaluated at separate radii the two satellite parameters were poorly correlated to either the observed or relative windspeed. Radial distance from the storm center was found to explain 63% of the variance in windspeed. When this relation was removed by screen regression, the two satellite parameters could explain only an additional 2% to 3% of the variance. Correlation between the cloud band crossing angle and the wind field crossing angle was less than 0.5 at all radii. Correlation between the windspeed and the wind field crossing angle was less than 0.2. In both cases, the coefficients were lower than expected.
Series Statement
NOAA technical report NESS ; no. 74
Uniform Title
NOAA technical report NESS ; 74.
Subject
  • Barycentric coordinates
  • Winds > Estimates > Mathematical models
  • Wind forecasting > Mathematical models
  • Hurricanes > Forecasting > Mathematical models
  • Meteorological satellites > Observations
  • Vents > Devis estimatifs > Modèles mathématiques
  • Vents > Prévision > Modèles mathématiques
  • Ouragans > Prévision > Modèles mathématiques
  • Satellites météorologiques > Observations
  • Barycentric coordinates
  • Meteorological satellites
  • Wind forecasting > Mathematical models
Genre/Form
  • dissertations.
  • Academic theses
  • Observations
  • Academic theses.
  • Thèses et écrits académiques.
Note
  • "August 1976."
Thesis (note)
  • Modified version of the author's thesis (M.S.), University of Maryland, 1975.
Bibliography (note)
  • Includes bibliographical references (p. 39-40).
OCLC
  • ocm02637316
  • 2637316
  • SCSB-1511122
Owning Institutions
Princeton University Library