DoD Handbook- Global Climatic Data for Developing Military Products

Keywords developing military products global climatic data military handbook

4.3.1 Presentation of the Data. Data is presented as follows:

(a) Climatic information for each element (or combination) in section 5 generally includes the recorded extreme, the frequency of occurrence during the most severe month of the year, and long-term climatic extremes. Data on diurnal cycles are presented where appropriate. Interpolation will provide intermediate values of elements between specified frequencies. Extrapolation should not be used to make estimates outside the range of values in section 5.

(b) Upper-air climatic data as a function of altitude are presented in tables of the 1-, 5-, 10-, and 20-percent frequencies-of-occurrence, and recorded extremes, for each element. These are envelopes of extreme conditions at each altitude and do not represent internally consistent profiles, since values for each altitude would not occur simultaneously at any one location or region. Consistent upper-air profiles of temperature, density, and rainfall rate/water concentration versus altitude that occur at the same time and place are also presented. For temperature and density, these are based on specified percentiles at selected altitudes. Precipitation-rate profiles are based on specified surface extremes.

4.3.2 Additional Information. Appendix A provides additional information for the climatic elements, regional climatic types, or upper air environments discussed in section 5. References to scientific reports and journal articles from which the data were taken, and other sources of information are also provided.

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1.1 Purpose.
The data provided are intended to serve as natural environmental starting points for the sequence of engineering analyses to derive environmental design criteria for materiel. The climatic data are also intended to provide guidance in the development of environmental tests of materiel.

1.2 Application.
(a) This handbook provides climatic information for land, sea, and air environments in which military materiel may be required to operate. These data represent free air (ambient) conditions, and are not to be confused with the response of materiel, either to these conditions, or to those of a platform on or within which the materiel might be located.

(b) Selection of specific climatic values in this handbook should be made only after determining: (1) the area of geographic deployment; (2) handling and logistics requirements; and (3) the operational requirements of the materiel being developed (see 4.3.3).

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