Convection initiation by density currents: Role of convergence, shear, and dynamical organization

Monthly Weather Review

Volumn 127, Issue 10, 1999, Pages 2455-2464

  Moncrieff, Mitchell W ^a   Liu, Changhai ^a  

^a NATIONAL CENTER FOR ATMOSPHERIC RESEARCH   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERIC CONVECTION; ATMOSPHERIC DYNAMICS; DENSITY CURRENT;

EID: 0033382941     PISSN: 00270644     EISSN: None     Source Type: Journal    
DOI: 10.1175/1520-0493(1999)127<2455:CIBDCR>2.0.CO;2     Document Type: Article

References (34)

1. Atkins, N. T., and R. M. Wakimoto, 1997: Influence of the synopticscale flow on sea breezes observed during CaPE. Mon. Wea. Rev., 125, 2112-2130.
2. Benjamin, T. B., 1968: Gravity currents and related phenomena. J. Fluid Mech., 31, 209-248.
3. Carbone, R. E., 1982: A severe frontal rainband. Part I: Stormwide hydrodynamic structure. J. Atmos. Sci., 39, 258-279.
4. _, J. W. Conway, N. A. Crook, and M. W. Moncrieff, 1990: The generation and propagation of a nocturnal squall line. Part 1: Observations and implications for mesoscale predictability. Mon. Wea. Rev., 118, 25-49.
5. Charba, J., 1974: Application of gravity current model to analysis of squall-line gust front. Mon. Wea. Rev., 102, 140-156.
6. Chen, C., 1995: Numerical simulations of gravity currents in uniform shear flows. Mon. Wea. Rev., 123, 3240-3253.
7. Clark, T. L., W. D. Hall, and J. L. Coen, 1996: Source code documentation for the Clark-Hall cloud-scale model: Code Version G3CH01. NCAR Tech. Note. NCAR/TN-426+STR.
8. Clarke, R. H., 1961: Mesostructure of dry cold fronts over featureless terrain. J. Meteor., 18, 715-735.
9. Crook, N. A., 1997: Simulation of convective storms over the Tiwi Islands and comparison with observations from MCTEX. BMRC Research Rep. 64, 7-10.
10. _, R. E. Carbone, M. W. Moncrieff, and J. W. Conway, 1990: The generation and propagation of a nocturnal squall line. Part II: Numerical simulations. Mon. Wea. Rev., 118, 50-65.
11. Goff, R. C., 1976: Vertical structure of thunderstorm outflows. Mon. Wea. Rev., 104, 1429-1440.
12. Hobbs, P. V., and P. O. G. Persson, 1982: The mesoscale and microscale structure and organization of clouds and precipitation in midlatitude cyclones. Part V: The substructure of narrow coldfrontal rainbands. J. Atmos. Sci., 39, 280-295.
13. James, P. K., and K. A. Browning, 1979: Mesoscale structure of line convection at surface cold fronts. Quart. J. Roy. Meteor. Soc., 105, 371-382.
14. Keenan, T., K. Saito, R. E. Carbone, and J. W. Wilson, 1997: The Maritime Continent Thunderstorm Experiment (MCTEX): Observed lifecycle and some initial model simulations. BMRC Research Rep. 64, 3-5.
15. Lafore, J.-P., and M. W. Moncrieff, 1989: A numerical investigation of the organization and interaction of the convective and stratiform regions of tropical squall lines. J. Atmos. Sci., 46, 521-544.
16. Liu, C., and M. W. Moncrieff, 1996a: A numerical study of the effects of ambient flow and shear on density currents. Mon. Wea. Rev., 124, 2282-2303.
17. _, and _, 1996b: An analytical study of density currents in sheared, stratified fluids including the effects of latent heat release. J. Atmos. Sci., 53, 3303-3312.
18. Moncrieff, M. W., 1989: Analytic models of narrow cold-frontal rainbands and related phenomena. J. Atmos. Sci., 46, 150-162.
19. _, and M. J. Miller, 1976: The dynamics and simulation of tropical cumulonimbus and squall lines. Quart. J. Roy. Meteor. Soc., 102, 373-394.
20. _, and D. W. K. So, 1989: A hydrodynamical theory of conservative bounded density currents. J. Fluid. Mech., 198, 177-197.
21. Mueller, C. K., and R. E. Carbone, 1987: Dynamics of a thunderstorm outflow. J. Atmos. Sci., 44, 1879-1898.
22. Nielsen, J. W., and P. P. Neilley, 1990: The vertical structure of New England coastal fronts. Mon. Wea. Rev., 118, 1793-1807.
23. Reible, D. D., J. E. Simpson, and P. F. Linden, 1993: The sea breeze and gravity-current frontogenesis. Quart. J. Roy. Meteor. Soc., 119, 1-16.
24. Rotunno, R., J. B. Klemp, and M. L. Weisman, 1988: A theory for strong, long-lived squall lines. J. Atmos. Sci., 45, 463-485.
25. Simpson, J. E., 1987: Gravity Currents in the Environment and Laboratory. Ellis Horwood Limited, 244 pp.
26. Thorpe, A. J., M. J. Miller, and M. W. Moncrieff, 1982: Two-dimensional lines. Quart. J. Roy. Meteor. Soc., 108, 739-761.
27. von Karman, T., 1940: The engineer grapples with non-linear problems. Bull. Amer. Math. Soc., 46, 615-683.
28. Wakimoto, R. M., 1982: The life cycle of thunderstorm gust fronts as viewed with Doppler radar and rawisonde data. Mon. Wea. Rev., 110, 1060-1082.
29. Wexler, R., 1946: Theory and observations of land and sea breezes. Bull. Amer. Meteor. Soc., 27, 272-287.
30. Wilson, J. W., and W. E. Schreiber, 1986: Initiation of convective storms at radar-observed boundary-layer convergence lines. Mon. Wea. Rev., 114, 2516-2536.
31. Xu, Q., 1992: Density currents in shear flows: A two-fluid model. J. Atmos. Sci., 49, 511-524.
32. _, and M. W. Moncrieff, 1994: Density current circulations in shear flows. J. Atmos. Sci., 51, 434-446.
33. _, M. Xue, and K. E. Droegemeier, 1996: Numerical simulations of density currents in sheared environments within a vertically confined channel. J. Atmos. Sci., 53, 770-786.
34. Xue, M., Q. Xu, and K. E. Droegemeier, 1997: A theoretial and numerical study of density currents in nonconstant shear flows. J. Atmos. Sci., 54, 1998-2019.