Abstract
Using the unprecedented observational facilities deployed duringthe 1999 Cooperative Atmosphere-Surface Exchange Study (CASES-99),we found three distinct turbulent events on the night of 18October 1999. These events resulted from a density current,solitary wave, and internal gravity wave, respectively. Our studyfocuses on the turbulence intermittency generated by the solitarywave and internal gravity wave, and intermittent turbulenceepisodes associated with pressure change and wind direction shiftsadjacent to the ground. Both the solitary and internal gravitywaves propagated horizontally and downward. During the passage ofboth the solitary and internal gravity waves, local thermal andshear instabilities were generated as cold air was pushed abovewarm air and wind gusts reached to the ground. These thermal andshear instabilities triggered turbulent mixing events. Inaddition, strong vertical acceleration associated with thesolitary wave led to large non-hydrostatic pressure perturbationsthat were positively correlated with temperature. The directionaldifference between the propagation of the internal gravity waveand the ambient flow led to lateral rolls. These episodic studiesdemonstrate that non-local disturbances are responsible for localthermal and shear instabilities, leading to intermittentturbulence in nocturnal boundary layers. The origin of thesenon-local disturbances needs to be understood to improve mesoscalenumerical model performance.
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Balsley, B. B., Frehlich, R. G., Meillier, Y., and Jensen, M. L.: 2002, 'Preliminary CASES-99 Measurements of Steep Vertical Gradients in Temperature and Turbulence Structure Using a Tethered Lifting System (TLS)', in 15th Symposium on Boundary Layers and Turbulence, 15-19 July 2002, Wageningen, The Netherlands, American Meteorological Society, MA, pp. 461-464.
Balsley, B. B., Jensen, M. L., and Frehlich, R. G.: 1998, 'The Use of State-of-the-Art Kites for Profiling the Lower Atmosphere', Boundary-Layer Meteorol. 87, 1-25.
Balsley, B. B., Williams, J. W., Jensen, M. L., Knapp, K. G., Williams, J. B., and Tyrrell, G. W.: 1994, 'Vertical Profiling of the Atmosphere Using High-Tech Kites', Environ. Sci. Technol. 28, 422-426.
Balsley, B. B., Williams, J. B., Tyrrell, G. W., and Balsley, C. L.: 1992, 'Atmospheric Research Using Kites: Here We Go Again!', Bull. Amer. Meteorol. Soc. 73, 17-29.
Banta, R. M., Newsom, R. K., Lundquist, J. K., Pichugina, Y. L., Coulter, R. C., and Mahrt, L.: 2002, 'Nocturnal Low-Level Jet Characteristics over Kansas during CASES-99', Boundary-Layer Meteorol. 105, 221-252.
Blumen, W., Banta, R., Burns, S. P., Fritts, D. C., Newsom, R., Poulos, G. S., and Sun, J.: 2001, 'Turbulence Statistics of a Kelvin-Helmholtz Billow Event Observed in the Night-Time Boundary Layer during the Cooperative Atmosphere-Surface Exchange Study Field Program', Dyn. Atmos. Oceans 34, 189-204.
Cheung, T. K. and Little, C. G.: 1990, 'Meteorological Tower, Microbarograph Array, and Sodar Observations of Solitary-LikeWaves in the Nocturnal Boundary Layer', J. Atmos. Sci. 47, 2516-2536.
Chimonas, G.: 1993, 'Surface Drag Instabilities in the Atmospheric Boundary Layer', J. Atmos. Sci. 50, 1914-1924.
Christie, D. R.: 1989, 'Long Nonlinear Waves in the Lower Atmosphere', J. Atmos. Sci. 46, 1462-1491.
Coulter, R. L. and Martin, T. J.: 1986, 'Results from a High Power, High Frequency Sodar', Atmos. Res. 20, 257-270.
Coulter, R. L. and Doran, J. C.: 2002, 'Spatial and Temporal Occurrences of Intermittent Turbulence during CASES-99', Boundary-Layer Meteorol. 105, 329-349.
Coulter, R. L. and Martin, T. J.: 1986, 'Results from a High Power, High Frequency Sodar', Atmos. Res. 20, 257-270.
Doran, J. C. and Horst, T. W.: 1981, 'Velocity and Temperature Oscillations in Drainage Winds', J. Appl. Meteorol. 20, 360-364.
Droegemeier, K. K. and Wilhelmson, R. B.: 1986, 'Kelvin-Helmholtz Instability in a Numerically Simulated Thunderstorm Outflow', Bull. Amer. Meteorol. Soc. 67, 416-417.
Einaudi, F. and Finnigan, J. J.: 1993, 'Wave-Turbulence Dynamics in the Stably Stratified Boundary Layer', J. Atmos. Sci. 50, 1841-1864.
Einaudi, F., Bedard, Jr., A. J., and Finnigan, J. J.: 1989, 'A Climatology of Gravity Waves and Other Coherent Disturbances at the Boulder Atmospheric Observatory during March-April 1984', J. Atmos. Sci. 46, 303-329.
Emanuel, K. A.: 1983, 'On the Dynamical Definitions of “Mesoscale” ', in D. K. Lilly and T. Gal-Chen (eds.), Mesoscale Meteorology-Theories, Observations and Models, Reidel, Dordrecht, pp. 1-12.
Etling, D.: 1990, 'On Plume Meandering under Stable Stratification', Atmos. Environ. 24A, 1979-1985.
Finnigan, J. J.: 1988, 'Kinetic Energy Transfer between Internal Gravity Waves and Turbulence', J. Atmos. Sci. 45, 486-505.
Finnigan, J. J., Einaudi, F., and Fua, D.: 1984, 'The Interaction between an Internal Gravity Wave and Turbulence in the Stably-Stratified Nocturnal Boundary Layer', J. Atmos. Sci. 41, 2409-2436.
Fitzjarrald, D. R. and Moore, K. E.: 1990, 'Mechanism of Nocturnal Exchange between the Rain Forest and the Atmosphere', J. Geophys. Res. 95, 16839-16850.
Fulton, R., Zrnic, D. S., and Doviak, R. J.: 1990, 'Initiation of a Solitary Wave Family in the Demise of a Nocturnal Thunderstorm Density Current', J. Atmos. Sci. 47, 319-337.
Gao, W., Shaw, R. H., and Paw U, K. T.: 1989, 'Observation of Organized Structure in Turbulent Flow within and above a Forest Canopy', Boundary-Layer Meteorol. 47, 349-377.
Gibson-Wilde, D. E., Werne, J. A., Fritts, D. C., and Hill, R. J.: 2000, 'Direct Numerical Simulation of VHF Radar Measurements of Turbulence in the Mesosphere', Radio Sci. 35, 783-798.
Gill, A. E.: 1982, Atmosphere-Ocean Dynamics, Academic Press, 662 pp.
Grund, C. J., Banta, R. M., George, J. L., Howell, J. N., Post, M. J. Richter, R. A., and Weickmann, A. M.: 2001, 'High-Resolution Doppler Lidar for Boundary Layer and Cloud Research', J. Atmos. Oceanic Tech. 18, 376-393.
Hardy, K. R., Reed, R. J., and Mather, G. K.: 1973, 'Observation of Kelvin-Helmholtz Billows and their Mesoscale Environment by Radar, Instrumented Aircraft, and a Dense Radiosonde Network', Quart. J. Roy. Meteorol. Soc. 99, 279-293.
Howell, J. and Sun, J.: 1999, 'Surface Layer Fluxes in Stable Conditions', Boundary-Layer Meteorol. 90, 495-520.
Ince, T., Pazmany, A. L., Frasier, S. J., and McIntosh, R. E.: 1998, 'A High Resolution FM-CW Sband Radar for Boundary Layer Profiling and Cloud Applications', in Proceedings of the 1998 Battlespace Atmospherics Conference, Hanscom AFB, MA, December 1-3, 1998, pp. 432-439.
Lee, X. and Barr, A.: 1998, 'Climatology of Gravity Waves in a Forest', Quart. J. Roy. Meteorol. Soc. 124, 1403-1419.
Lu, Nai-Ping, Neff, W. D., and Kaimal, J. C.: 1983, 'Wave and Turbulence Structure in a Disturbed Nocturnal Inversion', Boundary-Layer Meteorol. 26, 141-155.
Mahrt, L.: 1999, 'Stratified Atmospheric Boundary Layers', Boundary-Layer Meteorol. 90, 375-396.
Mahrt, L. and Larsen, S.: 1982, 'Small Scale Drainage Front', Tellus 34, 579-587.
Mahrt, L., Vickers, D., Nakamura, R., Soler, M. R., Sun, J., Burns, S., and Lenschow, D. H.: 2001, 'Shallow Drainage Flow', Boundary-Layer Meteorol. 101, 243-260.
Nappo, C. J.: 1991, 'Sporadic Breakdowns of Stability in the PBL over Simple and Complex Terrain', Boundary-Layer Meteorol. 54, 69-87.
Newsom, R. K. and Banta, R. M.: 2003, 'Shear-Flow Instability in the Stable Nocturnal Boundary Layer as Observed by Doppler Lidar during CASES-99', J. Atmos. Sci. 60, 16-33.
Paw U, K. T., Brunet, Y., Collineau, S., Shaw, R. H., Maitani, T., Qiu, J., and Hipps, L.: 1992, 'On Coherent Structures in Turbulence above and within Agricultural Plant Canopies', Agric. For. Meteorol. 61, 55-68.
Poulos, G. S., Blumen, W., Fritts, D. C., Lundquist, J. K., Sun, J., Burns, S. P., Nappo, C., Banta, R., Newsome, R., Cuxart, J., Terradellas, E., Balsley, B., and Jensen, M.: 2002, 'CASES-99: A Comprehensive Investigation of the Stable Nocturnal Boundary Layer', Bull. Amer. Meteorol. Soc. 83, 555-581.
Rottman, J. W. and Einaudi, F.: 1993, 'Solitary Waves in the Atmosphere', J. Atmos. Sci. 50, 2116-2136.
Sun, J., Burns, S. P., Lenschow, D. H., Banta, R., Newsom, R., Coulter, Frasier, R. S., Ince, T., Nappo, C., Cuxart, J., Blumen, W., Lee, X., and Hu, X.-Z.: 2002, Intermittent Turbulence Associated with a Density Current Passage in the Stable Boundary Layer', Boundary-Layer Meteorol. 105, 199-219.
Sun, J., Jensen, N. O., Hummelshoej, P., Jorgensen, H., Mahrt, L., and Chen, Z.: 1998, 'Study of Forest-Atmospheric Interactions over a Beech Forest', in 23rd Conference on Agricultural and Forest Meteorology, 2-6 November 1998, Albuquerque, New Mexico, American Meteorology Society, MA, pp. 47-50.
Wulfmeyer, V., Randall, M., Brewer, W. A., and Hardesty, R. M.: 2000, '2-µm Doppler Lidar Transmitter with High Frequency Stability and Low Chirp', Opt. Lett. 25, 1228-1230.
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Sun, J., Lenschow, D.H., Burns, S.P. et al. Atmospheric Disturbances that Generate Intermittent Turbulence in Nocturnal Boundary Layers. Boundary-Layer Meteorology 110, 255–279 (2004). https://doi.org/10.1023/A:1026097926169
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DOI: https://doi.org/10.1023/A:1026097926169