FURTHER STUDIES OF DROUGHT OVER NORTHEASTERN UNITED STATES

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Abstract
Following a study of large-scale atmospheric and oceanic interactions associated with the recent Northeast drought, smaller-scale manifestations of this drought are studied with the help of records from New York Central Park Observatory. The long-period records of this Observatory (since 1869) are then studied statistically in relation to dry periods. Among the most interesting facts brought out is a long-period downward trend in precipitation beginning sometime in the early 1930's or perhaps late 1920's. This appears to be related to general circulation aberrations of the same kind found in the earlier study of the recent (5-yr.) drought. However, an attempt to demonstrate a long-period air-sea interaction similar to the earlier-described short-period interaction failed—perhaps because of inadequacies in sea-surface temperature data. Finally, nationwide precipitation patterns accompanying dryness in the Northeast are determined from 59 yr. of precipitation data. These patterns throw considerable light on the scale and nature of the precipitation-inhibiting processes as a function of season.

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