contributor author | Hirose, Masafumi;Takayabu, Yukari N.;Hamada, Atsushi;Shige, Shoichi;Yamamoto, Munehisa K. | |
date accessioned | 2018-01-03T11:00:39Z | |
date available | 2018-01-03T11:00:39Z | |
date copyright | 2/28/2017 12:00:00 AM | |
date issued | 2017 | |
identifier other | jcli-d-16-0442.1.pdf | |
identifier uri | http://138.201.223.254:8080/yetl1/handle/yetl/4245995 | |
description abstract | AbstractIn 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. | |
publisher | American Meteorological Society | |
title | Spatial Contrast of Geographically Induced Rainfall Observed by TRMM PR | |
type | Journal Paper | |
journal volume | 30 | |
journal issue | 11 | |
journal title | Journal of Climate | |
identifier doi | 10.1175/JCLI-D-16-0442.1 | |
journal fristpage | 4165 | |
journal lastpage | 4184 | |
tree | Journal of Climate:;2017:;volume( 030 ):;issue: 011 | |
contenttype | Fulltext | |