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Bergthórsson, Páll; Döös, Bo R. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Subjects:
A method to analyze upper air charts numerically is presented. The analysis is expressed by the height values of the pressure surface in gridpoints. The computed height in a gridpoint is obtained as a weighted mean of height values derived from the surrounding height and wind observations, the forecast height in the point and the corresponding normal height. Nine 500 mb maps are analyzed with the aid of the Swedish computor BESK, six of these consecutive. The size of the grid was 32 × 41 points. The analyses have been compared with two independent conventional analyses. The mean values of the root mean square of the differences between the numerical and the conventional analyses were 26 m and 24 m respectively and 26 m between the two conventional ones. The root mean square of the differences between the observed and analyzed heights was 22 m in the mean. This is roughly what should be expected judging from the existing knowledge about observation errors. Three barotropic forecasts have been computed from the numerical analyses. They are compared with the corresponding numerical forecasts from conventionally analyzed maps. It was not possible to find any significant difference between the goodness of the forecasts based on the numerical analyses and the conventional analyses.DOI: 10.1111/j.2153-3490.1955.tb01170.x
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • ELIASSENA,,, 1954: An Attempt to formulate the Problems encountered in the Study of the Requirements of Upper Air Network for Numerical Forecasting. Report .from the Institute qf T/zeoretical Astrophysics, Blindern, Norway.
    • - 1954: Provisional Report on Calculation of Spatial Covariance and Autocorrelation of the Pressure field. Institute for Weather and Climate Research, The Norwegian Academy qf Science arid Letters. Publicafiorr and Reports July I , 1953-June 30. 1954.
    • GILCHRISTB,. and CRESSMANG,. P., 1954: An Experiment in Objective Analysis. Tellus 6, pp 309-318.
    • NYBERGA, ., 1952: O n the comparison of Radiosonde Data in Payerne May 1950. Sveriges Meteorologiska och Hydrologiska Institut, Comnrirnicatiori. SeriesB, No. 9.
    • PANOFSKJY.,, 1949: Objective Weather Map Analysis. Juicrrral of Meteorology, 6, pp 386-392.
    • RAAB,L. and RODSKJERN,., 1950: A Study of the Accuracy of Measurements of the VIisala Radiosofidc, Arkiv,fiir Gei!fysik, Bd I , N r 2.
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