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contributor authorHirose, Masafumi;Takayabu, Yukari N.;Hamada, Atsushi;Shige, Shoichi;Yamamoto, Munehisa K.
date accessioned2018-01-03T11:00:39Z
date available2018-01-03T11:00:39Z
date copyright2/28/2017 12:00:00 AM
date issued2017
identifier otherjcli-d-16-0442.1.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4245995
description abstractAbstractIn this study, the spatial variability in precipitation at a 0.1° scale is investigated using long-term data from the Tropical Rainfall Measuring Mission Precipitation Radar. Marked regional heterogeneities emerged for orographic rainfall on characteristic scales of tens of kilometers, high concentrations of small-scale systems (<10 km) over alpine areas, and sharp declines around mountain summits. In detecting microclimates, an additional concern is suspicious echoes observed around certain geographical areas with relatively low rainfall. A finescale land?river contrast can be extracted in the diurnal behavior of rainfall in medium-scale systems (10?100 km), corresponding to the course of the Amazon River. In addition, rainfall enhancement over small islands (0.1°?1°) was identified in terms of the storm scale. Even 0.1°-scale flat islands experience more rainfall than the adjacent ocean, primarily as a result of localized small or moderate systems. By contrast, compared with small islands, high-impact large-scale systems (>100 km) result in more rainfall over the adjacent ocean. Finescale hourly data represented the abrupt asymmetric fluctuation in rainfall across the coastline in the tropics and subtropics (30°S?30°N). Significant diurnal modulations in the rainfall due to large-scale systems are found over tropical offshore regions of vast landmasses but not over small islands or in the midlatitudes between 30° and 36°. Rainfall enhancement over small tropical islands is generated by abundant afternoon rainfall, which results from medium-scale storms that are regulated by the island size and inactivity of rainfall over coastal waters.
publisherAmerican Meteorological Society
titleSpatial Contrast of Geographically Induced Rainfall Observed by TRMM PR
typeJournal Paper
journal volume30
journal issue11
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-16-0442.1
journal fristpage4165
journal lastpage4184
treeJournal of Climate:;2017:;volume( 030 ):;issue: 011
contenttypeFulltext


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