Search Results

You are looking at 1 - 2 of 2 items for :

  • Author or Editor: Robert W. Lenhard x
  • Journal of the Atmospheric Sciences x
  • All content x
Clear All Modify Search
Robert W. Lenhard Jr.

Abstract

The accuracy with which meteorological elements can be measured by currently operational radiosonde equipment is examined and representative error values calculated. A method of analyzing cross-sections for missile test ranges is described. The average of two soundings is plotted at the mid-point between them and the soundings reconstructed by use of the geostrophic extrapolation. The gain in accuracy from averaging is offset by the geostrophic approximation. These opposing effects are shown by error values calculated for a fixed range distance and by distance values over which the analysis is useful.

Full access
Robert W. Lenhard and Werner A. Baum

Abstract

The concept of a satisfactory normal monthly temperature is considered. January and July mean temperature records at seven stations in the United States are examined. It is found that, except in the western United States in summer, such temperature records may be accepted as constituting a random sample. It is also found that, in general, mean monthly temperatures are not normally distributed.

The method of confidence limits is applied to determination of a satisfactory normal temperature. Seasonal and geographical variations in reliability of normal temperatures are observed. Consideration is given to the adequacy with which the normal characterizes the temperature record, and to the influence of trends and cyclic fluctuations on this adequacy. It is suggested that a normal of desired reliability be computed from the most recent portion of the record to be most representative.

In general, normals computed for different periods of record will differ; but these differences may have little practical significance when the magnitude of the effect is considered relative to the requirements of the application.

Full access