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http://hdl.handle.net/20.500.11765/7494
On the optimal measuring area for pointwise rainfall estimation: a dedicated experiment with 14 laser disdrometers
Title: | On the optimal measuring area for pointwise rainfall estimation: a dedicated experiment with 14 laser disdrometers |
Authors: | Tapiador, Francisco J.; Navarro Martínez, Andrés; Moreno Galdón, Raul; Jiménez Alcázar, Alfonso; Marcos Martín, Cecilia
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Keywords: | Precipitation; In situ atmospheric observations; Remote sensing; Statistics; Sensors |
Issue Date: | 2017 |
Publisher: | American Meteorological Society |
Citation: | Journal of Hydrometeorology. 2017, 18(3), p. 753-760 |
Publisher version: | https://dx.doi.org/10.1175/JHM-D-16-0127.1 |
Abstract: | Laser disdrometers measure the particle size distribution (PSD) of hydrometeors through a small cross-sectional (tens of square centimeters) surface. Such a limited area induces a sampling effect in the estimates of the PSD, which translates to error in the reflectivity–rain-rate (Z–R) relationship used for ground radar estimates of rainfall, estimates of kinetic energy of precipitation, and any other hydrometeorological application relying on particle size information. Here, the results of a dedicated experiment to estimate the extent of the effect of limited area sampling of rainfall are presented. Using 14 Parsivel, version 1 (Parsivel-1), disdrometers placed within 6 m2, it was found that the combined area of at least seven disdrometers is required for the estimates to start converging to a stable value. The results can be used to quantify the degree of over-/underestimation of precipitation parameters for a single instrument due to the limited collecting area effect. It has been found that a single disdrometer may underestimate instantaneous rain rate by 70%. |
Sponsorship : | Funding from projects CGL2013- 48367-P, CGL2016-80609-R (Ministerio de Economía y Competitividad), UNCM08-1E-086 (Ministerio de Ciencia e Innovacion), and CYTEMA (UCLM) is gratefully acknowledged. |
URI: | http://hdl.handle.net/20.500.11765/7494 |
ISSN: | 1525-755X 1525-7541 |
Appears in Collections: | Artículos científicos 2015-2018 |
Files in This Item:
File | Description | Size | Format | ||
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![]() | jhm-d-16-0127.1.pdf | 1,42 MB | Adobe PDF | ![]() View/Open |
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