DOI: 10.1175/JCLI-D-16-0442.1
Scopus记录号: 2-s2.0-85019120512
论文题名: Spatial contrast of geographically induced rainfall observed by TRMM PR
作者: Hirose M. ; Takayabu Y.N. ; Hamada A. ; Shige S. ; Yamamoto M.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 11 起始页码: 4165
结束页码: 4184
语种: 英语
Scopus关键词: Electromagnetic wave backscattering
; Landforms
; Large scale systems
; Precipitation (chemical)
; Precipitation (meteorology)
; Radar
; Radar measurement
; Rain gages
; Storms
; Tropics
; Diurnal effects
; Orographic effects
; Radars/radar observations
; Regional effects
; Satellite observations
; Rain
英文摘要: In 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. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49658
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Science and Technology, Meijo University, Nagoya, Japan; Atmosphere and Ocean Research Institute, University of Tokyo, Tokyo, Japan; Graduate School of Science, Kyoto University, Kyoto, Japan
Recommended Citation:
Hirose M.,Takayabu Y.N.,Hamada A.,et al. Spatial contrast of geographically induced rainfall observed by TRMM PR[J]. Journal of Climate,2017-01-01,30(11)