Campaign : Biogenic Aerosols - Effects on Clouds and Climate: Snowfall Experiment

 
Poster PDF

Authors

Dmitri N Moisseev — University of Helsinki
Annakaisa Marjaana von Lerber — Finnish Meteorological Institute
Walter A. Petersen — NASA Marshall Space Flight Center
Matti Leskinen — University of Helsinki
V. Chandrasekar — Colorado State University

Category

Ice Physical and Radiative Properties

Description

The snowfall measurement campaign, which will take place during AMF2 deployment in Finland, will focus on understanding snowfall microphysics and characterizing performance of surface based snowfall measurement instruments. This will be achieved by combining triple frequency (X, Ka, W -band) radar observations of vertical structure of the precipitation, microwave radiometer observations of LWP, lidar measurements of supercooled water layers with surface based observations of snowfall rate and particle size distributions. To facilitate accurate surface measurements of snowfall properties a double fence inter-comparison reference wind protection for the weighing precipitation gauge and 2D-video disdrometer is build on site. Due to the duplication of some of instruments, namely 2D-video, Parsivel and weighing gauge, we would be able to characterize their measurement errors as a function of wind speed thus aiming at providing a correction procedure for the other ARM sites. The campaign begins in the beginning of February. In the poster we present the measurement setup and preliminary results of snowing events.

Lead PI

Dmitri N Moisseev — University of Helsinki