The research project is aimed at better understanding the processes determining the life cycle and variability of low visibility (fog) events in a complex environment. The focus is on the New York region where three major airports are located. The area experiences a significant number of low ceilings and reduced visibility events, particularly during the fall, winter and spring seasons.
       
These events occur in a complex environment, characterized by  high levels of pollution, complex surface contrasts at various scales (urban, suburban, rural areas, and coastal waters of the Atlantic ocean), as well as various weather regimes.

The goal is to study, and ultimately develop/improve a forecasting system for low visibility (fog) events using a variety of numerical models (mesoscale models, 1D (column) high-resolution boundary layer models). An observational component of the project is taking  place in the area, with data being collected from a number of sophisticated instruments located on the campus of the Brookhaven National Laboratory on Long Island New York. 

This work is funded by the FAA/Aviation Weather Research Program and is a joint effort between the National Ceiling and Visibility, Winter Weather and Terminal Ceiling and Visibility Product Development Teams (PDT's).

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title_resREP

Ph.D. dissertation blueline

Characterizing Fog and the Physical Mechanisms Leading to its Formation during Precipitation in a Coastal Area of the Northeastern United States

Refereed publications blueline
Tardif, R. and R. M. Rasmussen, 2007: Event-based climatology and typology of fog in the New York City region.  J. Appl. Meteor. Climatol., In press.
Tardif, R., 2007: The impact of vertical resolution in the explicit numerical forecasting of radiation fog: A case study. Pure Appl. Geophys. , In press.

Gultepe, I., R. Tardif, S. C. Michaelides, J. Cermak, A. Bott, J. Bendix,  M. D. Müller,  M. Pagowski, B. K. Hansen, G. P. Ellrod, W. Jacobs, G. Toth, and S. Cober, 2007: Fog research: A review of past achievements and future perspectives. Pure Appl. Geophys. , In press.

Tardif, R. and R. M. Rasmussen, 2007: Process-oriented analysis of environmental conditions associated with precipitation fog events in the New York City region. Submitted to J. Appl. Meteor. Climatol.

Tardif, R. and R. M. Rasmussen, 2007: Raindrops evaporating in vertically non-uniform atmospheric layers. Part I: Theoretical and numerical investigation of their departure from equilibrium.Submitted to J. Atmos. Sci.

Tardif, R. and R. M. Rasmussen, 2007: Raindrops evaporating in vertically non-uniform atmospheric layers. Part II: Evolution of environmental conditions and role in fog formation. Submitted to J. Atmos. Sci.

Non-refereed publications blueline
Tardif, R., 2006: Some results from a sounding enhanced observing period focused on low ceiling and visibility in the northeastern United States. 12th Conference on Aviation, Range and Aerospace Meteorology, Atlanta, GA.
Tardif, R., 2006: A climatological study of low ceiling and fog events associated with the occurrence of precipitation in the northeastern United States. 12th Conference on Aviation, Range and Aerospace Meteorology, Atlanta, GA.
Landolt, S. D., R. Tardif and P. H. Herzegh, 2006: A comparison of atmospheric profiles using a twelve channel microwave profiling radiometer and radiosondes during low ceiling events. 12th Conference on Aviation, Range and Aerospace Meteorology, Atlanta, GA
Tardif, R., 2004: Characterizing fog occurrences in the Northeastern United States using historical data. 11th Conference on Aviation, Range and Aerospace Meteorology, Hyannis Port
Tardif, R., J. Cole, P. H. Herzegh, S. D. Landolt, R. M. Rasmussen and M. L. Tryhane, 2004: First observations of fog and low ceiling environments at the FAA northeast ceiling and visibility field site. 11th Conference on Aviation, Range and Aerospace Meteorology, Hyannis Port
Tardif, R., 2004: On the impact of vertical resolution in the numerical forecasting of fog. 11th Conference on Aviation, Range and Aerospace Meteorology, Hyannis Port
 
Reports blueline
Fog and low cloud ceiling environments observed during the Long Island Fog Regimes (LIFR) field program
Field calibration of the ECH2O soil moisture probes
Calibration Procedure of the Droplet Measurement Technologies' FM-100 Fog Droplet Spectrometer and History of Calibration Tests
A preliminary numerical sensitivity analysis of marine fog formation under conditions observed in the northeastern United States using the COBEL 1D model
Dew and frost deposition and their role in the regulation of radiation fog onset: a numerical sensitivity study
A numerical sensitivity study of the boundary layer evening transition to the direct radiative effects of lower tropospheric aerosols.
Boundary layer aerosol backscattering and its relationship to relative humidity from a combined Raman-elastic backscatter lidar.

Presentations blueline
"Fog and Low Cloud Ceilings in the Northeastern United States: Climatology and Dedicated Field Study". Fog Remote Sensing and Modeling (FRAM) workshop, June 2005, UQAM, Montréal, Canada. ppticon
"Some Research and Development Activities Toward the Improvement of Short-Term Forecasts of Low Ceiling and Reduced Visibility (C&V) Conditions in the United States". COST 722 Expert Meeting, October 2004, Météo-France, Toulouse, France.ppticon
"Using a 1D Numerical Model to Forecast Marine Stratus Burn-Off at the San Francisco Airport". NCAR / RAL,  2002. ppticon


 


Last updated: November 2006

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