Premium
Recent changes in the diurnal cycle of precipitation over the United States
Author(s) -
Dai Aiguo
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900318
Subject(s) - precipitation , diurnal cycle , climatology , daytime , environmental science , atmospheric sciences , diurnal temperature variation , period (music) , amplitude , meteorology , geology , geography , physics , quantum mechanics , acoustics
Hourly precipitation data from 1963 to 1993 of the contiguous United States were analyzed for secular trends in the diurnal cycle of precipitation. During the period the winter daytime and nighttime precipitation frequencies and the diurnal amplitude of precipitation frequency increased by ∼30–47% over the Southwest, while the winter precipitation frequencies and the diurnal amplitude of precipitation intensity decreased by similar amounts over the Northwest. During this period, summer afternoon precipitation frequency increased by ∼30–60% in the Southwest and decreased by ∼15–30% in the Southeast.