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Roy Rasmussen

General Information

Roy Rasmussen

RAL & TIIMES
Senior Scientist - Deputy Director TIIMES
BEACHON & Water System

Contact Information:
PO Box 3000, Boulder, CO 80307-3000
Office: FL2 - 3002
Telephone: 303-497-8430
Email: rasmus@ucar.edu
Home Page - Vita

Research Focus FY08:

TIIMES Retreat - High resolution figure

I spent most of my time on TIIMES this year leading and coordinating the Water System Program including a Headwaters Workshop in March 2008.

In addition ot the Water System Program I also have an activie role with the BEACHON project in collaboration with Alex Guenther and Beth Holland.

I also coordinated the TIIMES retreat held in November 2007. This was an opportunity to showcase the various projects and programs within TIIMES, exchange ideas, and help plan for the future direction of TIIMES.

Other activities include:

Hydrometeorology and Water Resources (HAP):
The Hydrometeorological Applications Program works to understand how water vapor, precipitation, and land surface hydrology interact across scales to define the hydrological cycle. Research results are used to improve weather and climate forecasts and to aid decision makers in a variety of water resource management applications such as flash flood prediction.

Snowfall and Freezing Precipitation:
Airport ground deicing operations are significantly effected by both snow and freezing precipitation (rain and drizzle), thus improved detection and forecasts of these conditions will increase both the safety and efficiency of airline and airport operations.

Hotplate snowgauge and de-icing operations.

High resolution figure

Weather Support to Deicing Decision Making (WSDDM):
The accumulation of ice on aircraft prior to take off has long been recognized as one of the most significant safety hazards affecting the aviation industry today. As little as 0.08 mm of ice on a wing surface can increase drag and reduce airplane lift by 25%. Acutely aware of the impacts these icing hazards can have on aviation, the Federal Aviation Administration (FAA) began supporting ground de-icing research at the National Center for Atmospheric Research (NCAR) in 1991. As a direct result of this FAA program, scientists at the Research Applications Program (the principal division of NCAR responsible for aviation weather projects) have developed a state-of-the art, integrated display system that depicts accurate, real-time nowcasts of snowfall rate, plus current temperature, humidity, wind speed and direction.

NCAR-RAP's Marshall Field Site: Winter Weather Group

Activities of the Meteorology Sub-committee of the FAA/Industry Aircraft Ground Deicing Working Group
co-chairs: Tom Fahey (Northwest Airlines), Warren Underwood (FAA), Roy Rasmussen (NCAR)
9 October 2008

 

Community Service FY08:

  • ASOS Technical Review Board, National Weather Service

Scientific Talks FY08:

  • Overview of Hydromet Application Laboratory (Boulder, CO, October 08)
  • Overview of Water System Program (Estes Park, CO, October 08)
  • WSDDM System (Denver, CO, October 08)
  • NCAR Water Cycle Research (Boulder, CO, October 08)
  • NCAR Water Cycle Research (Boulder, CO, October 08)
  • Overview of the Wyoming Weather Modification Pilot Program (Laramie, WY, October 08)
  • Overview of Hydromet Application Laboratory (Boulder, CO, October 08)
  • Colorado Headwater's Project (Boulder, CO, October 08)
  • WSDDM System applied to the Vancouver Olympics (Whistler, BC Canada, October 08)
  • NCAR Water Cycle Research (Tsukuba,  Japan, October 08)
  • Colorado Headwater's Project (Vienna,  Austria, October 08)
  • WSDDM, Check Time and LWE (Helsinki,  Finland, October 08)
  • Evaluation of 10 degree tilt of a wind on snowfall rate (Warsaw,  Poland, October 08)
  • LWE System (Warsaw,  Poland, October 08)
  • Summary of FAA/Industry Ground Deicing Working Group Acitivities (Warsaw,  Poland, October 08)
  • Overview of Water System Program (Boulder, CO, October 08)
  • Evaluation of the Wyoming Weather Modification Project (Alpine, WY, October 08)
  • Overview of the NCAR Water System Program (Arlington, VA, October 08)

Publications FY08:

Ikeda, K., R. M. Rasmussen, C.-H. Liu, G. Thompson, L. Xue, 2008: Investigation of the dependence of squall line structure and dynamics on microphysical parameterization. 15th Intl. Conf. on Clouds and Precipitation, Cancun, MX, International Association of Meteorology and Atmospheric Science.

Ikeda, K., R. M. Rasmussen, E. A. Brandes, F. McDonough, 2008: Freezing drizzle detection with WSR-88D radars. J. Appl. Meteor. Climat., doi: 10.1175/2008JAMC1939.1.

Tardif, R., R. M. Rasmussen, 2008: Process-oriented analysis of environmental conditions associated with precipitation fog events in the New York City region. J. Appl. Meteor. Climat., 47(6), 1681-1703, doi: 10.1175/2007JAMC1734.1.

Thompson, G., P. R. Field, R. M. Rasmussen, W. D. Hall, 2008: Explicit forecasts of winter precipitation using an improved bulk microphysics scheme. Part II: Implementation of a new snow parameterization. Mon. Wea. Rev., doi: 10.1175/2008MWR2387.1. (In Press)

Phillips, C., J. O. Pinto, M. Steiner, R. M. Rasmussen, N. Oien, R. E. Bateman, 2008: Statistical assessment of explicit model forecasts of convection using a new object-based approach. 13th Conf. on Aviation, Range and Aerospace Meteorology, New Orleans, LA, US, American Meteorological Society, 11.5, 10 pp.

Wolfson, M. M., W. J. Dupree, R. M. Rasmussen, M. Steiner, S. G. Benjamin, S. S. Weygandt, 2008: Consolidated Storm Prediction for Aviation (CoSPA). 8th ICNS Conf., New Orleans, LA, US, American Meteorological Society, J6.5, 16 pp.

Brandes, E. A., K. Ikeda, G. Zhang, M. Schonhuber, R. M. Rasmussen, 2007: A statistical and physical description of hydrometeor distributions in Colorado snow storms using a video disdrometer. J. Appl. Meteor. Climat., American Meteorological Society, 46, 634-650.

Brandes, E. A., K. Ikeda, G. Zhang, M. Schonhuber, R. M. Rasmussen, 2007: A statistical and physical description of hydrometeor distributions in Colorado snowstorms using a video disdrometer. J. Appl. Meteor. Climat., 46, 634-650, doi: 10.1175/JAM2489.1. (Accepted)