. Annual data summary and climatological evaluation CERC Field Research Facility, 1985. Meteorology; Oceanographic research stations; Water waves. 76. Visibility was measured with a secci disk and, similar to water temperature, variation was related to onshore and offshore winds. Onshore winds moved warm clear surface water toward shore, while offshore winds brought up colder bottom water with large concentrations of suspended matter. Present year 77. Figure 38 presents the surface visibility values for the year. Large variations were common, and visibility less than 1 m was expecte
. Annual data summary and climatological evaluation CERC Field Research Facility, 1985. Meteorology; Oceanographic research stations; Water waves. 76. Visibility was measured with a secci disk and, similar to water temperature, variation was related to onshore and offshore winds. Onshore winds moved warm clear surface water toward shore, while offshore winds brought up colder bottom water with large concentrations of suspended matter. Present year 77. Figure 38 presents the surface visibility values for the year. Large variations were common, and visibility less than 1 m was expected in any month. 10n 9-1 B-, 7-j 6-i 5-i *?: 3- ; 2-. 1- E _i m >. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1985 MONTH Figure 38. Daily sea surface water visibility, 1985 Present versus past years 78. In general, visibility was higher than in prior years. In particu- lar, during October the monthly mean was m, over m higher than the average for past Octobers (Figure 39). The annual mean was m above that during prior years (Table 10). All years 79. Throughout the year the visibility averages over 2 m with an asso- ciated standard deviation (Table 10). During June and July the visibil- ity was over m (standard deviation over m), while during November the average is under 1 m, and the deviation is only m. Figure 40 shows the 61. 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 Miller, H. Carl; U. S. Army Engineer Waterways Experiment Station; Coastal Engineering Research Center (U. S. ); United States. Army. Corps of Engineers. Vicksburg, Miss. : U. S. Army Engineer Waterways Experiment Station ; Springfield, Va. : available from National Technical Information Service
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