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--- parsivelnya [2026/05/23 08:46] – kerstin
+++ parsivelnya [2026/05/23 09:12] (current) – kerstin
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 ===== Principle =====
-The OTT Parsivel 2 is a laser-based optical system for complete and reliable measurement of all types of precipitation. The size range of measurable liquid precipitation particles is from 0.2 to 8 mm. For solid precipitation particles the size range is from 0.2 to 25 mm. The size range is divided into 32 classes. The measuring range of particle velocity is from 0.2 to 20 m/s and also divided into 32 classes. The precipitation particles are categorized as follows:
+The OTT Parsivel 2 is a laser-based optical system for complete and reliable measurement of all types of precipitation. The size range of measurable liquid precipitation particles is from 0.2 to 8 mm. For solid precipitation particles, the size range is from 0.2 to 25 mm. The size range is divided into 32 classes. The particle velocity range is 0.2 to 20 m/s and is divided into 32 classes. The precipitation particles are categorized as follows:
   * Drizzle
   * Drizzle with rain
@@ Line 16: / Line 16: @@
   * Freezing rain
   * Hail
+For liquid precipitation, the rain rate can be determined from the derived raindrop-size and velocity distributions. In the case of solid precipitation, the precipitation rate is highly uncertain due to variable particle shapes, densities, and fall velocities. Wind and turbulence affect the measured velocities, leading to high uncertainties in the assumed particle fall velocities. This can also affect the particle type classification and might result in a misclassification of particles.
-===== Instrument =====
-{{ :instruments:parsivelnya:img_4969.jpg?&400 |}}\\
-Current setup of [[http://www.ott.com/web/ott_de.nsf/id/pa_parsivel2_examples_e.html|OTT]] Parsivel 2 at [[http://www.awipev.eu/|AWIPEV Ny-Ålesund]], Svalbard on the roof of the atmospheric observatory
 ===== Data =====
-If you are interested in receiving data please contact [[kebell@meteo.uni-koeln.de|Kerstin Ebell]]
+If you are interested in receiving data, please contact [[kerstin.ebell@uni-koeln.de|Kerstin Ebell]]
 [[https://atmos.meteo.uni-koeln.de/~hatpro/dataBrowser/dataBrowser1.html?site=Ny-Alesund&date=0&UpperLeft=Parsivel-Overview | Quicklooks]]
@@ Line 47: / Line 44: @@
 | Power supply | 10 ... 28V DC, reverse polarity protection |
 | Current drawn |Electronics 65 mA at 24 V DC / Heating 2/4 A; 12/24 V DC |
+===== References =====
+**Ebell, K., C. Buhren, R. Gierens**, G. Chellini, **M. Lauer, A. Walbröl**, S. Dahlke, **P. Krobot, and M. Mech**, 2025: Impact of weather systems on observed precipitation at Ny-Ålesund (Svalbard), //Atmos. Chem. Phys.//, 25, 7315–7342, [[https://doi.org/10.5194/acp-25-7315-2025]].