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... AbstractInformation on the spatio-temporal rainfall occurrence, its microphysical characteristics and its Z-R relations required to provide rainfall mapping based on rain radar data is hardly available for tropical high mountains. Therefore, this study aims to analyze rainfall types in the Andes cordillera to derive different rain-type Z-R relations using disdrometer observations at three study sites representative for different geographic positions and elevations (2610, 3626 and 3773 m a.s.l.). Rain categorization based on mean drop volume diameter (Dm) thresholds (; ; ) was performed using drop size distribution (DSD) data at a 5-min time step over an approximate 2-year period at each location. It was found that: (i) Rain observations characterized by higher(lower) Dm and rain rates are more frequent at the lower(higher) site. (ii) Due to its geographic position, very light rain (drizzle) is more common at higher altitudes with longer-duration events while 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 the local Z-R relationship derivation. (iv) Low A coefficients () for first rain type resemble typical characteristics of orographic precipitation. (v) Greater values of A (lowest and highest stations for Dm >1.0 mm) are attributed to transitional rainfall as found in other studies. (vi) Rain-type Z-R relations show a better adjustment in comparison to sitespecific Z-R relationships. The study is the first contribution of Z-R relations for tropical rainfall at the high Andes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Meteorology and Climatology American Meteorological Society

Analysis of rain types and their Z-R relationships at different locations in the high Andes of southern Ecuador

Loading next page...
 
/lp/ams/analysis-of-rain-types-and-their-z-r-relationships-at-different-QOkvYDuY0V
Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1558-8432
D.O.I.
10.1175/JAMC-D-17-0009.1
Publisher site
See Article on Publisher Site

Abstract

AbstractInformation on the spatio-temporal rainfall occurrence, its microphysical characteristics and its Z-R relations required to provide rainfall mapping based on rain radar data is hardly available for tropical high mountains. Therefore, this study aims to analyze rainfall types in the Andes cordillera to derive different rain-type Z-R relations using disdrometer observations at three study sites representative for different geographic positions and elevations (2610, 3626 and 3773 m a.s.l.). Rain categorization based on mean drop volume diameter (Dm) thresholds (; ; ) was performed using drop size distribution (DSD) data at a 5-min time step over an approximate 2-year period at each location. It was found that: (i) Rain observations characterized by higher(lower) Dm and rain rates are more frequent at the lower(higher) site. (ii) Due to its geographic position, very light rain (drizzle) is more common at higher altitudes with longer-duration events while 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 the local Z-R relationship derivation. (iv) Low A coefficients () for first rain type resemble typical characteristics of orographic precipitation. (v) Greater values of A (lowest and highest stations for Dm >1.0 mm) are attributed to transitional rainfall as found in other studies. (vi) Rain-type Z-R relations show a better adjustment in comparison to sitespecific Z-R relationships. The study is the first contribution of Z-R relations for tropical rainfall at the high Andes.

Journal

Journal of Applied Meteorology and ClimatologyAmerican Meteorological Society

Published: Aug 24, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off