Some aspects of post-frontal convective areas along the West Coast of the United States : final report for period October 1982-September 1983
Winninghoff, Francis Joseph
Elsberry, Russell L.
MetadataShow full item record
The European Center for medium-Range WEather Forecasts (ECMWF) Level III-b analyses are used to study cases of post-frontal convective areas that occurred off the West Coast of the United States. A five-year climatology suggests than an average of about 13 convective events occurs each winter, and that two of three cases are likely to have intense and well-organized convection. Five events that occurred during the First Special Observing Period of the First GARP Global Experiment are selected for detailed study, Associations are sought between the post-frontal convective areas and standard synoptic and dynamic variables. The convection appears to be closely tied to the position of the upper level cold trough. Cold advection aloft and low-level heating as the cold air streams over the warmer ocean contribute to maintenance of low static stability in the convective region. The feasibility of diagnosing the location of the convective regions is explored with diabatic and frictional parameterizations of the Naval Operational Global Atmospheric Prediction System (NOGAPS). Wind, temperature, geopotential and moisture fields from the ECMWF are used to specify the large-scale forcing. The cumulus precipitation diagnosed by the NOGAPS does agree surprisingly well with the post-frontal convective areas in these five cases. (Author)
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
NPS Report NumberNPS63-84-005
Showing items related by title, author, creator and subject.
Mesoscale vertical structure of an explosive oceanic cyclone. Gardner, Elizabeth B. (Monterey, California. Naval Postgraduate School, 1991-06);The mesoscale vertical structure of an explosively deepening oceanic cyclone on 19-20 January 1989 during the Experiment on Rapidly Intensifying Cyclones over the Atlantic (ERICA) was studied. Hand analyses of height, ...
An analysis of the synoptic and mesoscale forcing of the 08/09 March 1992 STORMFEST mesoscale convective system Robichaud, Raymond M. (Monterey, California. Naval Postgraduate School, 1995-03);A severe mesoscale convective system (MCS) developed in northeast Texas and southern Oklahoma during STORMFEST in 1992. The MCS, associated with a bulging dryline, produced five tornadoes, widespread flash flooding, large ...
Processes controlling the distribution of aerosol particles in the lower marine boundary layer during the First Aerosol Characterization Experiment (ACE 1) Bates, Timothy S.; Kapustin, Vladimir N.; Quinn, Patricia K.; Covert, David S.; Coffman, Derek J.; Mari, Celine; Durkee, Philip A.; De Bruyn, Warren J.; Saltzman, Eric S. (American Geophysical Union, 1998-07-20);The goals of the International Global Atmospheric Chemistry (IGAC) Program's First Aerosol Characterization Experiment (ACE 1) are to determine and understand the properties and controlling factors of the aerosol in the ...