Abstract
During the Intensive Observation Period (IOP) 7 (22 February 1986) of the Genesis of Atlantic Lows Experiment a persistent coastal front was observed along the Carolina coast in the eastern United States. An intensive baroclinic zone, associated with the cold air damming to the east of the Appalachian Mountains, and the warm marine atmospheric boundary layer over the Gulf Stream, resulted in a northeasterly low-level geostrophic wind maximum near the coast.
Two convergence zones were observed, one near the shore and the other near the western edge of the Gulf Stream. The convergence zone near the coastline was relatively weaker than that near the Gulf Stream. The differential surface thermal forcing caused enhanced convergence associated with the frontogenesis, and a meso-low was observed over the offshore front. The terms in the frontogenesis equation are estimated, and the diabatic term is found to be larger than the frontogenetic confluence term along the shore.
Similar content being viewed by others
References
Ballentine, R. J.: 1980, 'A Numerical Investigation of New England Coastal Frontogenesis', Mon. Wea. Rev. 108, 1479-1497.
Bosart, L. F., Vaudo, C. J., and Helsdon, Jr., J. H.: 1972, 'Coastal Frontogenesis', J. Appl. Meteorol. 11, 1236-1258.
Bosart, L. F.: 1975, 'New England Coastal Frontogenesis', Quart. J. Roy. Meteorol. Soc. 101, 957- 978.
Bosart, L. F. and Lin, S. C.: 1984, 'A Diagnostic Analysis of the Presidents' Day Storm of February 1979', Mon. Wea. Rev. 112, 2148-2177.
Brown, E. N., Friehe C. A., and Lenschow, D. H.: 1983, 'The Use of Pressure Fluctuations on the Nose of an Aircraft for Measuring Air Motion', J. Clim. Appl. Meteorol. 22, 171-180.
Dirks, R. A., Kuettner, J. P., and Moore, J. A.: 1988, 'Genesis of Atlantic Lows Experiment (GALE): An Overview', Bull. Amer. Meteor. Soc. 69, 148-160.
Doyle, J. D. and Warner, T. T.: 1990, 'Mesoscale Coastal Processes during GALE IOP 2', Mon. Wea. Rev. 118, 283-308.
Doyle, J. D. and Warner, T. T.: 1993, 'A Numerical Investigation of a Coastal Frontogenesis and Mesoscale Cyclogenesis During GALE IOP 2', Mon. Wea. Rev. 121, 1048-1077.
Holt, T. and Raman, S.: 1990, 'Marine Boundary Layer Structure and Circulation in the Region of Offshore Redevelopment of a Cyclone During GALE', Mon. Wea. Rev. 118, 382-410.
Holt, T. and Raman, S.: 1992, 'Three Dimensional Mean and Turbulence Structure of a Coastal Front Influenced by the Gulf Stream', Mon. Wea. Rev. 120, 17-39.
Hsu, S. A.: 1984, 'Sea-Breeze Like Winds Across the North Wall of the Gulf Stream: An Analytical Model', J. Geophys. Res. 89, 2025-2028.
Huang, C. Y. and Raman, S.: 1990, 'Numerical Simulations of Cold Air Advection Over the Appalachian Mountains and the Gulf Stream', Mon. Wea. Rev. 118, 343-362.
Huang, C. Y. and Raman, S.: 1992, 'A Three Dimensional Numerical Investigation of Carolina Coastal Front and the Gulf Stream Rainband', J. Atmos. Sci. 49, 560-584.
LeMone, M. A. and Pennell, W. T.: 1980, 'A Comparison of Turbulence Measurements from Aircraft', J. Appl. Meteorol. 19, 1420-1437.
Lenschow, D. H. and Spyers-Duran, P.: 1986, 'Measurement Techniques: Air Motion Sensing', NCAR Bull. No. 23. [Available from NCAR, Boulder, CO 80307.]
Lind, R. J. and Shaw, W. J.: 1990, 'The Time-Varying Calibration of an Airborne Lyman-α Hygrometer', J. Atmos. Oceanic Technol. 8, 186-190.
Mercer, T. J. and Kreitzberg, C. W.: 1986, GALE Field Program Summary, Dept. of Physics and Atmospheric Sciences, Drexel University, Philadelphia, PA 19104.
Nielsen, J. W.: 1989, 'The Formation of New England Coastal Fronts', Mon. Wea. Rev. 117, 1380- 1401.
Raman, S. and Riordan, A.: 1988, 'The Genesis of Atlantic Lows Experiment: Planetary Boundary Layer Subprogram of GALE', Bull. Amer. Meteorol. Soc. 69, 161-172.
Reddy, N. C. and Raman, S.: 1994, 'Observations of a Mesoscale Circulation Over the Gulf Stream Region', The Glo. Atmos. and Ocean Sys. 2, 21-39.
Richwein, B. A.: 1980, 'The Damming Effect of the Southern Appalachians', Nat. Wea. Dig. 5, 2-12.
Riordan, A. J.: 1990, 'Examination of the Mesoscale Features of the GALE Coastal Front of 24-25 January 1986', Mon. Wea. Rev. 118, 258-282.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Raman, S., Reddy, N.C. & Niyogi, D.S. Mesoscale Analysis of a Carolina Coastal Front. Boundary-Layer Meteorology 86, 125–145 (1998). https://doi.org/10.1023/A:1000605030775
Issue Date:
DOI: https://doi.org/10.1023/A:1000605030775