DOI: 10.1002/2016JD026282
论文题名: Orographic rainfall hot spots in the Andes-Amazon transition according to the TRMM precipitation radar and in situ data
作者: Chavez S.P. ; Takahashi K.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 11 起始页码: 5870
结束页码: 5882
语种: 英语
英文关键词: Amazon
; Andes
; in situ measurements
; orographic rainfall
; precipitation radar
; TRMM
英文摘要: The Andes-Amazon transition, along the eastern Peruvian Andes, features “hot spots” with strong precipitation. Using 15 years of Tropical Rainfall Measuring Mission PR data we established a robust relation between terrain elevation and mean surface precipitation, with the latter peaking around 1000 m above sea level (asl), coinciding with the moisture flux peak of the South American Low Level Jet (SALLJ). There is strong diurnal variability, with afternoon (13–18 LT) convection in the Amazon plains, while on the eastern slopes (1000–2000 m asl), after the forcing associated with the thermal heating of the Andes subsides, convection grows during the night and surface precipitation peaks around 01–06 LT and organizes into mesoscale convective systems (MCSs). These then displace downslope to an terrain elevation of 700 m asl with stratiform regions spreading upslope and downslope and then decay during the remainder of the morning. The large MCSs contribute with at least 50% of daily rainfall (60% of the 01–06 LT rainfall). On synoptic scales, the large MCSs are more common in stronger SALLJ conditions, although subtropical cold surges are responsible for 16% of the cases. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62656
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Instituto Geofísico del Perú, Lima, Peru
Recommended Citation:
Chavez S.P.,Takahashi K.. Orographic rainfall hot spots in the Andes-Amazon transition according to the TRMM precipitation radar and in situ data[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(11)