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Anomalous Orographic Rains of O'ahu (Hawai'i) Revisited: An Over-sea Origin Indicated
|Title:||Anomalous Orographic Rains of O'ahu (Hawai'i) Revisited: An Over-sea Origin Indicated|
|Authors:||Woodcock, Alfred H.|
|Issue Date:||Apr 1993|
|Publisher:||University of Hawaii Press|
|Citation:||Woodcock AH. 1993. Anomalous orographic rains of O'ahu (Hawai'i) revisited: an over-sea origin indicated. Pac Sci 47(2): 185-199.|
|Abstract:||The first study of anomalous orographic rains of O'ahu, Hawai'i,
utilized the average daily amounts and shower frequency characteristics as an
indication of where they were first formed. In this renewed study I show that the
rain rates, rather than the amounts and shower frequency, are more appropriate
for revealing rain origin. Hourly amounts at gage sites alined about parallel and
normal to the winds are graphically presented. The graphs reveal that many of
the rains, although concentrated over the island, apparently originated as light
rains over the windward sea along a crosswind line, intensifying as the
wind-borne overcast of cumulus clouds was carried inland. This finding adds
further support to early suggestions of an over-sea origin of many of O'ahu's
orographic rains. It is hypothesized that all of these anomalous rain lines, and
perhaps the trade-wind cumulus showers as well, originate upwind of the island.
The idea could be readily tested experimentally.
|Appears in Collections:||Pacific Science Volume 47, Number 2, 1993|
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