A Freezing Fog/Drizzle Event during the FRAM-S Project Meteorological Service of Canada

Format:

Conference/Event

Author/Creator:

Gultepe, Gultepe, author.

Contributor:

Isaac, George A.

Rasmussen, Roy Martin

Ungar, K.

Conference Name:

SAE 2011 International Conference on Aircraft and Engine Icing and Ground Deicing (2011-06-13 : Chicago, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

The objective of this work is to better understand freezingfog/drizzle conditions using observations collected during the FogRemote Sensing and Modeling project (FRAM-S) that took place at St.John's International Airport, St. John's, NL, Canada. Thislocation was ~1 km away from the Atlantic Ocean coast. During theproject, the following measurements at one minute resolution werecollected: precipitation rate (PR) and amount, fog/drizzlemicrophysics, 3D wind speed (Uh) and turbulence (Uh'),visibility (Vis), IR and SW radiative fluxes, temperature (T) andrelative humidity (RH), and aerosol observations. The reflectivityand microphysical parameters obtained from the Metek Incorporated MRR(Microwave Rain Radar) were also used in the analysis. Themeasurements were then used to obtain freezing fog/drizzlemicrophysical characteristics and their relation to visibility.The ground-based CIP (Cloud Imaging Probe) measurements offreezing fog/drizzle particles together with hydrometeormeasurements obtained from disdrometers have been used in theanalysis. During FRAM-S, ice accumulation over the surfaces wasmore than 2 cm on 26 March 2009 and this affected some of thevarious sensors but the major instruments worked properly to getfreezing fog/drizzle conditions. The results suggested that betterprediction techniques for freezing fog/drizzle events are neededfor marine environment applications. Particle microphysicalmeasurements play a crucial role for developing betternowcasting/forecasting techniques

Notes:

Vendor supplied data

Publisher Number:

2011-38-0028

Access Restriction:

Restricted for use by site license