. Compendium of meteorology. Meteorology. '°°i>MjJWi^. 8 10 12 15 i 20 24 30 8 10 12 15 20 24 30 WAVE PERIOD IN SECONDS Fig. 5.—Spectrograms of waves recorded during 14-16 March 1945 at Pendeen, England [1]. Each spectrogram gives the dis- tribution of energy among wave periods for a 20-minute record. The records were taken at 2-hourIy intervals. traveled in a general northeast direction, passing west of the British Isles. Four representative weather maps are shown in Figs. 6-9. The positions indicated for the "fetches" were determined according to the rules de- veloped for wave f
. Compendium of meteorology. Meteorology. '°°i>MjJWi^. 8 10 12 15 i 20 24 30 8 10 12 15 20 24 30 WAVE PERIOD IN SECONDS Fig. 5.—Spectrograms of waves recorded during 14-16 March 1945 at Pendeen, England [1]. Each spectrogram gives the dis- tribution of energy among wave periods for a 20-minute record. The records were taken at 2-hourIy intervals. traveled in a general northeast direction, passing west of the British Isles. Four representative weather maps are shown in Figs. 6-9. The positions indicated for the "fetches" were determined according to the rules de- veloped for wave forecasting.^ It should be noted that the fetch lengthened during the time interval between 1830,11 March, and 1830, 12 March. The spectrogram in Fig. 5 can be interpreted in terms of the classical wave theory, according to which com- ponent wave trains travel independently with the group 7. A different type of analysis based on the autocorrelation function has recently been applied to ocean waves by Seiwell and Wadsworth [14]. V = 4x by) Ls (10) Here Xy, and x, represent the location of a point dis- turbance and the wave station, respectively; U and ts the time of the disturbance and the time at which waves of period T arrived at the wave station. Equation (10) has a simple geometric interpretation on a time-distance. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Meteorological Society. Committee on the Compendium of Meteorology; Malone, Thomas F. Boston : American Meteorological Society
Size: 945px × 2645px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectmeteorology
