. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 23 mm 3,200 3,000 2900- - 2,700 - â APIA SAMOA. 1 1 1 1 1 1920 1930 1940 1950 1960 1970 1890 1900 1910 Figure 10. Twenty-year running means of annual rainfall at Apia, Western Samoa. do seem to be characteristic of many tropical high and low islands over the last century. Where similar fluctuations have been identified in continental areas, however, it has often been shown that there are substantial spatial variations in the trends revealed (Stewart 1973; Parthasarathy and Dhar 1974). Higher
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 23 mm 3,200 3,000 2900- - 2,700 - â APIA SAMOA. 1 1 1 1 1 1920 1930 1940 1950 1960 1970 1890 1900 1910 Figure 10. Twenty-year running means of annual rainfall at Apia, Western Samoa. do seem to be characteristic of many tropical high and low islands over the last century. Where similar fluctuations have been identified in continental areas, however, it has often been shown that there are substantial spatial variations in the trends revealed (Stewart 1973; Parthasarathy and Dhar 1974). Higher-frequency variations have also been identified using power spectrum analysis on records for 5 Caribbean and 10 Pacific Ocean islands with records ranging in length from 37 years (Banaba) to 116 years (Barbados). In the Caribbean the main cycles identified are long-term (more than 44 years), thus confirming the conclusions from the moving-average analysis; but cycles of , and 7 years are also statistically significant. In the Pacific stations the year cycle is particularly strong, though stations with longer records, such as Willis (in the Coral Sea), Fanning (Line Islands) and Funafuti, show significant cycles in the range 12-30 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 Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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