Measurements of solid precipitation with an optical disdrometer.

Lempio, Guido E., Bumke, Karl and Macke, Andreas (2007) Measurements of solid precipitation with an optical disdrometer. Open Access Advances in Geosciences, 19 (3). pp. 527-531. DOI 10.5194/adgeo-10-91-2007.

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Abstract

A study about measurements of solid precipitation using an optical disdrometer is presented. The optical disdrometer is an improved version of the ODM 470 disdrometer. It allows to measure hydrometeors within a size range of 0.4 to 22 mm in diameter.

The main advantage of this instrument is its ability to estimate accurately precipitation even under strong wind conditions (Großklaus, 1996). To measure solid precipitation a geometrical model was developed to determine the mean cross-sectional area of snow crystals for different predefined shapes and sizes. It serves to develop an algorithm, which relates the mean cross sectional area of snow crystals to their maximum dimension, liquid water content, and terminal velocity. The algorithm was applied to disdrometer measurements during winter 1999/2000 in Uppsala/Sweden. Resulting precipitation was compared to independent measurements of a Geonor gauge and to manual measurements. In terms of daily precipitation the disdrometer shows a reliable performance.

Document Type: Article
Keywords: Disdrometer, snow, measurement, drop size distribution, drop spectra, sea
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/adgeo-10-91-2007
ISSN: 1680-7359
Projects: Future Ocean
Date Deposited: 03 Dec 2008 16:51
Last Modified: 24 Aug 2017 03:46
URI: http://oceanrep.geomar.de/id/eprint/3128

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