Abstract
Climatological wind rose summaries for pairs of U.S. Weather Bureau Airport Stations, Winston-Salem vs. Greensboro, N.C., and Bakersfield vs. Fresno, Calif., were investigated for differences in the annual percentage frequency of hourly surface wind observations reported as calm; each pair was comprised of stations located close together in the same climatic regions.
Discrepancy in the frequency of calms reported at the paired stations is apparently related to differences in anemometer starting speeds.
Investigation of climatological wind rose summaries for 30 additional U.S. Weather Bureau Airport Stations disclosed an apparent bias in the frequency of reported calm conditions.
