Accession Number:

AD0446389

Title:

ON THE ORIGIN AND CLIMATOLOGY OF NOCTILUCENT CLOUDS

Descriptive Note:

Corporate Author:

AIR WEATHER SERVICE SCOTT AFB IL

Personal Author(s):

Report Date:

1964-08-01

Pagination or Media Count:

37.0

Abstract:

A review is made of the existing concepts of the constitution or origin of the clouds, and a mechanism is suggested which might explain their apparent dependence on latitude. Their frequency of occurrence with respect to latitude, longitude, time of year, and other factors, is analyzed in detail. Year-by-year changes in the number of occurrences are considered in relation to the 11-year sunspot cycle. A comprehensive sample of data on cloud movement is summarized, although in view of the highly complicated field of motion in noctilucent clouds, this subject is difficult to treat satisfactorily. A comparison is made of rocket samples of particle size and concentration with values deduced from polarization measurements.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE