Abstract
The flow structure on a gentle slope at Vallon d’Ol in the northern suburbs of Marseille in southern France has been documented by means of surface wind and temperature measurements collected from 7 June to 14 July 2001 during the ESCOMPTE experiment. The analysis of the time series reveals temperature and wind speed oscillations during several nights (about 60--90 min oscillation period) and several days (about 120–180 min oscillation period) during the whole observing period. Oscillating katabatic winds have been reported in the literature from theoretical, experimental and numerical studies. In the present study, the dynamics of the observed oscillating katabatic winds are in good agreement with the theory.In contrast to katabatic winds, no daytime observations of oscillating anabatic upslope flows have ever been published to our knowledge, probably because of temperature inversion break-up that inhibits upslope winds. The present paper shows that cold air advection by a sea breeze generates a mesoscale horizontal temperature gradient, and hence baroclinicity in the atmosphere, which then allows low-frequency oscillations, similar to a katabatic flow. An expression for the oscillation period is derived that accounts for the contribution of the sea-breeze induced mesoscale horizontal temperature gradient. The theoretical prediction of the oscillation period is compared to the measurements, and good agreement is found. The statistical analysis of the wind flow at Vallon d’Ol shows a dominant north-easterly to easterly flow pattern for nighttime oscillations and a dominant south-westerly flow pattern for daytime oscillations. These results are consistent with published numerical simulation results that show that the air drains off the mountain along the maximum slope direction, which in the studied case is oriented south-west to north-east.
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G. T. Amanatidis K. H. Papadopoulos J. G. Bartzis C. G. Helmis (1992) ArticleTitle‘Evidence of Katabatic Flows Deduced from a 84m Meteorological Tower in Athens Greece’,Boundary-Layer Meteorol 58 117–132
R. W. Arritt R. A. Pielke (1986) ArticleTitle‘Interactions of Nocturnal Slope Flows with Ambient Winds’ Boundary-Layer Meteorol 37 183–195
Bastin, S., Drobinski, P., Dabas, A. M., Delville, P., Reitebuch, O., and Werner, C.: 2004, ‘Impact of the Rhone and Durance Valleys on Sea-Breeze Circulation in the Marseille Area’,Atmos. Res., in press.
C. Bordreuil A. Barbia P. Compte (1973) ArticleTitle‘Vents de nord-ouest et Mistralà Marseille de 1982 à1970’ Monogr. de la Météorol. nationale 88 38
B. Broder H. A. Gygax (1985) ArticleTitle‘The Influence of Local Induced Wind Systems on the Effectiveness of Nocturnal Dry Deposition of Ozone’ Atmos. Environ 19 1627–1636
B. Cros P. Durand H. Cachier P. Drobinski E. Frejafon C. Kottmeier P.E. Perros V. -H. Peuch J. L. Ponche D. Robin F. Saïd G. Toupance H. Wortham (2004) ArticleTitle‘The ESCOMPTE Program: An Overview’ Atmos. Res 69 241–279
J. C. Doran T. W. Horst (1981) ArticleTitle‘Velocity and Temperature Oscillations in Drainage Winds’ J. Appl. Meteorol 20 361–364
P. Drobinski A.M. Dabas C. Haeberli P.H. Flamant (2003a) ArticleTitle‘Statistical Characterization of the Flow Structure in the Rhine Valley’ Boundary-Layer Meteorol. 106 483–505
P. Drobinski C. Haeberli E. Richard M. Lothon A. M. Dabas P. H. Flamant M. Furger R. Steinacker (2003b) ArticleTitle‘Scale Interaction Processes during MAP-IOP 12 South Foehn Event in the Rhine Valley’, Quart J. Roy. Meteorol. Soc. 129 729–754
J. Egger (1990a) ArticleTitle‘Thermally Induced Flow in Valleys with Tributaries Part II: Response to Cooling’ Meteorol. Atmos. Phys. 42 127–131
J. Egger (1990b) ArticleTitle‘Thermally Induced Flow in Valleys with Tributaries Part I: Response to Heating’ Meteorol. Atmos. Phys. 42 113–125
R. G. Fleagle (1950) ArticleTitle‘A Theory of Air Drainage’ J. Meteorol 7 227–232
C. G. Helmis K. H. Papadopoulos (1996) ArticleTitle‘Some Aspects of the Variation with Time of Katabatic Flow over a Simple Slope’ Quart. J. Roy. Meteorol. Soc 122 595–610
E. Hernandez J. De Las Parras I. Martin A. Rua (1998) ArticleTitle‘A Field Case Study and Numerical Simulation of Mountain Flows with Weak Ambient Winds’ J. Appl. Meteorol 37 623–637
G. S. P. Heywood (1933) ArticleTitle‘Katabatic Winds in a Valley’ Quart. J. Roy. Meteorol. Soc 59 47–58 Occurrence Handle10.1002/qj.49705924808
T. W. Horst J. C. Doran (1986) ArticleTitle‘Nocturnal Drainage Flow on Simple Slopes’ Boundary-Layer Meteorol 34 263–286
T. W. Horst J. C. Doran (1988) ArticleTitle‘The Turbulence Structure of Nocturnal Slope Flow’ J. Atmos. Sci 45 605–616
J. C. R. Hunt H. J. S. Fernando M. Princevac (2003) ArticleTitle‘Unsteady Thermally Driven Flows on Gentle Slopes’ J. Atmos. Sci 60 2169–2182
A. Jelinek (1938) ArticleTitle‘Beitr\ddot {\rm a} ge zur Mechanik der Periodischen Hangwinde’ Beitr. Phys. Atmos 24 60–84
J. A. King F. H. Shair D. D. Reible (1987) ArticleTitle‘The Influence of Atmospheric Stability on Pollutant Transport by Slope Winds’ Atmos. Environ 21 53–59
M. Kossmann U. Corsmeier S.F.J. de Wekker F. Fiedler R. Vögtlin N. Kalthoff H. Güsten B. Neininger (1999) ArticleTitle‘Observations of Handover Processes between the Atmospheric Boundary Layer and the Free Troposphere over Mountaineous Terrain’ Contr. Atmos. Phys 72 329–350
L. Mahrt (1982) ArticleTitle‘Momentum Balance of Gravity Flows’ J. Atmos. Sci 39 2701–2711
L. Mahrt S. Larsen (1990) ArticleTitle‘Relation of Slope Winds to the Ambient Flow over Gentle Terrain’ Boundary-Layer Meteorol 53 93–102
P. C. Manins B. L. Sawford (1979) ArticleTitle‘A Model of Katabatic Winds’ J. Atmos. Sci 36 619–630
R. T. McNider (1982) ArticleTitle‘A Note on Velocity Fluctuations in Drainage Flows’ J. Atmos. Sci 39 1658–1660
P.G. Mestayer P. Durand P. Augustin S. Bastin J.-M. Bonnefond B. Bénech B. Campistron A. Coppalle H. Delbarre B. Dousset P. Drobinski A. Druilhet E. Fréjafon C.S. B. Grimmond D. Groleau M. Irvine C. Kergomard S. Kermadi J.-P. Lagouarde A. Lemonsu F. Lohou N. Long V. Masson C. Moppert J. Noilhan B. Offerle T. R. Oke G. Pigeon V. Puygrenier S. Roberts J.M. Rosant F. Saïd J. Salmond M. Talbaut J. Voogt (2004) ArticleTitle‘The Urban Boundary-Layer Field Campaign in Marseille (UBL/CLU-ESCOMPTE): Set-Up and First Results’ Boundary-Layer Meteorol 114 315–365
P. J. Neiman F. M. Ralph A. B. White D. E. Kingsmill P. O. G. Persson (2002) ArticleTitle‘The Statistical Relationship between Upslope Flow and Rainfall in California’s Coastal Mountains: Observations during CALJET’ Mon. Wea. Rev 130 1468–1492
Puygrenier, V., Lohou, F., Campistron, B., Saïd, F., Pigeon, G., Bénech, B., and Serca, D.: 2004, ‘Influence of a Pulsated Sea-Breeze on the Dynamic Evolution and Pollution Concentration of the Atmospheric Boundary Layer’, Atmos. Res. in press.
U. Schumann (1990) ArticleTitle‘Large-Eddy Simulation of the Up-Slope Boundary Layer’ Quart. J. Roy. Meteorol. Soc 116 637–670
J. E Simpson (1994) Sea Breeze and Local Winds Cambridge University Press U.K.
R. B. Stull (1988) An Introduction to Boundary Layer Meteorology Kluwer Academic Publishers Dordrecht
P. D. Tyson (1968) ArticleTitle‘Velocity Fluctuations in the Mountain Wind’ J. Atmos. Sci 25 381–384
C. D. Whiteman (1990) ArticleTitle‘Observations of Thermally Developed Wind Systems in Mountainous Terrain’in Current Directions in Atmospheric Processes over Complex Terrain. Meteorol. Mono., No 45 Amer. Meteorol. Soc. 5 5–42
C. D. Whiteman T. B. McKee (1982a) ArticleTitle‘Breakup of Temperature Inversions in Deep Mountain Valleys: Part 1Observations’ J. Appl. Meteorol. 21 270–289
C.D. Whiteman T.B. McKee (1982b) ArticleTitle‘Breakup of Temperature Inversions in Deep Mountain Valleys: Part 2. Thermodynamic Model’ J. Appl. Meteorol. 21 290–302
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Bastin, S., Drobinski, P. Temperature And Wind Velocity Oscillations Along a Gentle Slope During Sea-Breeze Events. Boundary-Layer Meteorol 114, 573–594 (2005). https://doi.org/10.1007/s10546-004-1237-6
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DOI: https://doi.org/10.1007/s10546-004-1237-6