Analysis of Rain Types and Their Z–R Relationships at Different Locations in the High Andes of Southern Ecuador
Analysis of Rain Types and Their Z–R Relationships at Different Locations in the High Andes of Southern Ecuador
复制标题
厄瓜多尔南部安第斯高地不同地点的降雨类型及其 ZâR 关系分析
DOI:
10.1175/jamc-d-17-0009.1
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发表时间:
2017
影响因子:
3
通讯作者:
Bendix J
中科院分区:
文献类型:
--
作者:
Orellana-Alvear J;Célleri R;Rollenbeck R;Bendix J
Information on the spatiotemporal rainfall occurrence, its microphysical characteristics, and its reflectivity–rainfall (Z–R) relations required to provide rainfall mapping based on rain radar data is limited for tropical high mountains. Therefore, this study aims to analyze rainfall types in the Andes cordillera to derive different rain-typeZ–Rrelations using disdrometer observations at three study sites representative for different geographic positions and elevations (2610, 3626, and 3773 m MSL). Rain categorization based on mean drop volume diameter (Dm) thresholds [0.1 <Dm(mm) ≤ 0.5; 0.5 <Dm(mm) ≤ 1.0; 1.0 <Dm(mm) ≤ 2.0] was performed using drop size distribution data at a 5-min time step over an approximate 2-yr period at each location. The findings are as follows: (i) Rain observations characterized by higher (lower)Dmand rain rates are more frequent at the lower (higher) site. (ii) Because of its geographic position, very light rain (drizzle) is more common at higher altitudes with longer-duration events, whereas rainfall is more convective at the lower range. (iii) The specific spatial exposition regarding cloud and rain formation seems to play an important role for derivation of the localZ–Rrelationship. (iv) LowAcoefficients (≤60) for the first rain type resemble typical characteristics of orographic precipitation. (v) Greater values ofA(lowest and highest stations forDm> 1.0 mm) are attributed to transitional rainfall as found in other studies. (vi) Rain-typeZ–Rrelations show a better adjustment in comparison with site-specificZ–Rrelationships. This study is the first contribution ofZ–Rrelations for tropical rainfall in the high Andes.
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DOI:
10.1657/1938-4246-46.4.975
发表时间:
2014
期刊:
--
影响因子:
--
作者:
R. Hofstede;K. Dickinson;A. Mark;E. Narváez
通讯作者:
E. Narváez
影响因子:
0.6
作者:
A. D. Ochou;E. Zahiri;B. Bamba;Manlandon Koffi
通讯作者:
Manlandon Koffi
DOI:
10.1061/(asce)0733-9437(2003)129:2(108
发表时间:
2003
期刊:
Journal of Irrigation and Drainage Engineering-asce
影响因子:
--
作者:
B. Bièvre;A. Alvarado;L. Timbe;R. Célleri;J. Feyen
通讯作者:
J. Feyen
影响因子:
2.9
作者:
M. Larsen;J. Teves
通讯作者:
J. Teves
影响因子:
0.6
作者:
B. Bamba;A. D. Ochou;E. Zahiri;Modeste Kacou
通讯作者:
Modeste Kacou