Editorial Type:
Article
Article Type:
Research Article

Mesoscale Evolution of a Continental Occluded Cyclone

Patrick S. Market Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri

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James T. Moore Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, Missouri

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Print Publication:
01 Jul 1998
DOI:
https://doi.org/10.1175/1520-0493(1998)126<1793:MEOACO>2.0.CO;2
Page(s):
1793–1811
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Abstract

A diagnostic study of a continental occluding extratropical cyclone (ETC) during 1–2 November 1992 is presented using initializations from the Mesoscale Atmospheric Prediction System (MAPS), a hybrid sigma–isentropic coordinate model. Whereas recent studies have concentrated on maritime ETCs and have used numerical model simulations, this study employs diagnostic, observational data and model initializations to develop an occlusion model. In addition, isentropic parcel trajectories from a diabatic trajectory model are examined to trace the origin and termination of air parcels associated with the development of the occluded front. The chosen storm was a moderately deepening (i.e., typical) ETC over a data-rich continental region. This storm developed over the central United States, where commercial aircraft and a network of wind profilers provided copious asynoptic data aloft, which was ingested by the MAPS. Analyses of this well-defined occluded cyclone tend to verify that the advancing cold front overtakes the retreating warm front, though it does not “ride up” the warm front, and that warm-sector parcels are lifted upward in the vicinity of the occluded front, thereby confirming that some of the parcels aloft over the surface occluded front do originate near the surface prior to occlusion. Discussion is also provided on the nature of the occluded front as a true frontal boundary.

Corresponding author address: Patrick Market, 3507 Laclede Ave., Macelwane Hall, Rm. 318, St. Louis, MO 63103.Email: market@eas.slu.edu

Abstract

A diagnostic study of a continental occluding extratropical cyclone (ETC) during 1–2 November 1992 is presented using initializations from the Mesoscale Atmospheric Prediction System (MAPS), a hybrid sigma–isentropic coordinate model. Whereas recent studies have concentrated on maritime ETCs and have used numerical model simulations, this study employs diagnostic, observational data and model initializations to develop an occlusion model. In addition, isentropic parcel trajectories from a diabatic trajectory model are examined to trace the origin and termination of air parcels associated with the development of the occluded front. The chosen storm was a moderately deepening (i.e., typical) ETC over a data-rich continental region. This storm developed over the central United States, where commercial aircraft and a network of wind profilers provided copious asynoptic data aloft, which was ingested by the MAPS. Analyses of this well-defined occluded cyclone tend to verify that the advancing cold front overtakes the retreating warm front, though it does not “ride up” the warm front, and that warm-sector parcels are lifted upward in the vicinity of the occluded front, thereby confirming that some of the parcels aloft over the surface occluded front do originate near the surface prior to occlusion. Discussion is also provided on the nature of the occluded front as a true frontal boundary.

Corresponding author address: Patrick Market, 3507 Laclede Ave., Macelwane Hall, Rm. 318, St. Louis, MO 63103.Email: market@eas.slu.edu

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  • Barnes, S. L., 1973: Mesoscale objective map analysis using weighted time-series observations. NOAA Tech. Memo. ERLNSSL-62, National Severe Storms Laboratory, Norman, OK.

  • Benjamin, S. G., K. A. Brewster, R. Brümmer, B. F. Jewett, T. W. Schlatter, T. L. Smith, and P. A. Stamus, 1991: An isentropic three-hourly data assimilation system using ACARS aircraft observations. Mon. Wea. Rev.,119, 888–906.

  • Bjerknes, J., and H. Solberg, 1922: Life cycle of cyclones and the polar front theory of atmospheric circulation. Geofys. Publ.,3 (1), 1–18.

  • Bleck, R., and S. G. Benjamin, 1993: Regional weather prediction with a model combining terrain-following and isentropic coordinates. Part I: Model description. Mon. Wea. Rev.,121, 1770–1785.

  • Bluestein, H. B., 1993: Synoptic-Dynamic Meteorology in Midlatitudes. Volume II: Observations and Theory of Weather Systems. Oxford University Press, 594 pp.

  • Carlson, T. N., 1991: Mid-Latitude Weather Systems. Harper Collins Academic, 507 pp.

  • Cohen, R. A., 1993: An air stream analysis of the occluded cyclone. Ph.D. thesis, Drexel University, 171 pp.

  • ——, and C. W. Kreitzberg, 1997: Airstream boundaries in numerical weather simulations. Mon. Wea. Rev.,125, 168–183.

  • Holton, J. R., 1979: An Introduction to Dynamic Meteorology. 2d ed. Academic Press, 391 pp.

  • Hoskins, B. J., and F. P. Bretherton, 1972: Atmospheric frontogenesis models: mathematical formulation and solution. J. Atmos. Sci.,29, 11–37.

  • Kadiḡolu, M., 1991: Occludogenesis in simulated cyclones. Ph.D. dissertation, University of Missouri, 296 pp.

  • Keyser, D., 1986: Atmospheric fronts: An observational perspective. Mesoscale Meteorology and Forecasting, P. S. Ray, Ed., Amer. Meteor. Soc., 216–258.

  • Koch, S. E., M. DesJardins, and P. J. Kocin, 1983: An interactive Barnes objective map analysis scheme to use with satellite and conventional data. J. Climate Appl. Meteor.,22, 1487–1503.

  • Martin, J. E., 1998a: The structure and evolution of a continental winter cyclone. Part I: Frontal structure and the occlusion process. Mon. Wea. Rev.,126, 303–328.

  • ——, 1998b: The structure and evolution of a continental winter cyclone. Part II: Frontal forcing of an extreme snow event. Mon. Wea. Rev.,126, 329–348.

  • Moore, J. T., and J. P. Pino, 1990: An interactive method for estimating maximum hailstone size from forecast soundings. Wea. Forecasting,5, 508–525.

  • Penner, C. M., 1955: A three-front model for synoptic analyses. Quart. J. Roy. Meteor. Soc.,81, 89–91.

  • Petersen, R. A., and L. W. Uccellini, 1979: The computation of isentropic atmospheric trajectories using a “discrete model” formulation. Mon. Wea. Rev.,107, 566–574.

  • Petterssen, S., 1956: Weather Analysis and Forecasting. Vol. 2: Motion and Motion Systems. 2d ed. McGraw-Hill, 428 pp.

  • Rubino, J. T., 1986: The diagnosis of adiabatic forcing in the severe storm environment using isentropic trajectories. M.S. thesis, Department of Earth and Atmospheric Sciences, Saint Louis University, 119 pp.

  • Sanders, F., and C. A. Doswell, 1995: A case for detailed surface analysis. Bull. Amer. Meteor. Soc.,76, 505–521.

  • Schultz, D. M., and C. F. Mass, 1993: The occlusion process in a midlatitude cyclone over land. Mon. Wea. Rev.,121, 918–940.

  • Shapiro, M. A., and D. Keyser, 1990: Fronts, jet streams and the tropopause. Extratropical Cyclones: The Erik Palmén Memorial Volume, C. W. Newton and E. O. Holopainen, Eds., Amer. Meteor. Soc., 167–191.

  • Uccellini, L. W., 1990: Processes contributing to the rapid development of extratropical cyclones. Extratropical Cyclones: The Erik Palmén Memorial Volume, C. W. Newton and E. O. Holopainen, Eds., Amer. Meteor. Soc., 81–105.

  • Wallace, J. M., and P. V. Hobbs, 1977: Atmospheric Science: An Introductory Survey. Academic Press, 467 pp.

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