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Turbulent Vertical Diffusivity in the Sub-tropical Stratosphere : Volume 8, Issue 3 (12/02/2008)

By Pisso, I.

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Book Id: WPLBN0003982404
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Turbulent Vertical Diffusivity in the Sub-tropical Stratosphere : Volume 8, Issue 3 (12/02/2008)  
Author: Pisso, I.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Legras, B., & Pisso, I. (2008). Turbulent Vertical Diffusivity in the Sub-tropical Stratosphere : Volume 8, Issue 3 (12/02/2008). Retrieved from http://www.hawaiilibrary.net/


Description
Description: Laboratoire de Météorologie Dynamique UMR 8539, Paris, France. Vertical (cross-isentropic) mixing is produced by small-scale turbulent processes which are still poorly understood and paramaterized in numerical models. In this work we provide estimates of local equivalent diffusion in the lower stratosphere by comparing balloon borne high-resolution measurements of chemical tracers with reconstructed mixing ratio from large ensembles of random Lagrangian backward trajectories using European Centre for Medium-range Weather Forecasts analysed winds and a chemistry-transport model (REPROBUS). We focus on a case study in subtropical latitudes using data from HIBISCUS campaign. An upper bound on the vertical diffusivity is found in this case study to be of the order of 0.5 m2 s−1 in the subtropical region, which is larger than the estimates at higher latitudes. The relation between diffusion and dispersion is studied by estimating Lyapunov exponents and studying their variation according to the presence of active dynamical structures.

Summary
Turbulent vertical diffusivity in the sub-tropical stratosphere

Excerpt
Highwood, E J. and Hoskins, B J.: The tropical tropopause, Q J Roy. Meteorol. Soc., 124(549), 1579–1604, 1998.; Aliwell, S R., Halsall, J F., Pratt, K F E., O'Sullivan, J., Jones, R L., Cox, R A., Utembe, S R., Hansford, G M., and Williams, D E.: Ozone sensors based on WO3: a model for sensor drift and a measurement correction method, Meas. Sci. Technol., 12, 684–690, 2001.; Balluch, M G. and Haynes, P H.: Quantification of lower stratospheric mixing processes using aircraft data, J Geophys. Res., 102(D19), 23 487–23 504, \doi10.1029/97JD00607,1997.; Benettin, G., Galgani, G., Giorgilli, L., and Strelcyn, J.: Lyapunov characteristic exponents for smooth dynamical systems and for Hamiltonian systems; a method for computing all of them: I theory, Meccanica, 15, 9–30, 1980.; Del Castillo-Negrete, D. and Morrison, P.: Chaotic transport by Rossby waves in shear flow, Phys. Fluids A-Fluid, 5(4), 948–965, 1993.; Dexheimer, D. and Bowman, K.: Lagrangian methods for climatological analysis of regional atmospheric transport, J. Appl. Meteorol., 43(4), 623–630, 2004.; Fortuin, J P F. and Kelder, H.: An ozone climatology based on ozonesonde and satellite measurements, J Geophys. Res., 103(D24), 31 709–31 734, \doi10.1029/1998JD200008, 1998.; Hansford, G M., Freshwater, R A., Bosch, R A., Cox, R A., Jones, R L., Pratt, K F E., and Williams, D E.: A low cost instrument based on a solid state sensor for balloon-borne atmospheric O3 profile sounding, J. Environ. Monitor., 7(2), 158–162, 2005.; Haynes, P H. and Anglade, J.: The vertical-scale cascade in atmospheric tracers due to large-scale differential advection, J. Atmos. Sci., 54(9), 1112–1136, 1997.; Haynes, P H. and Shuckburgh, E.: Effective diffusivity as a diagnostic of atmospheric transport. \mboxPart II: troposphere and lower stratosphere, J Geophys. Res., 105(D18), 22 795–22 810, \doi10.1029/2000JD900092, 2000.; Hegglin, M I., Brunner, D., Peter, T., Staehelin, J., Wirth, V., Hoor, P., and Fischer, H.: Determination of eddy diffusivity in the lowermost stratosphere, Geophys. Res. Lett., 32, L13812, \doi10.1029/2005GL022495, 2005.; Holton, J R., Haynes, P H., MCIntyre, M E., Douglass, A R., Rood, R B., and Pfister, L.: Stratosphere-troposphere exchange, Rev. Geophys., 33(4), 403–439, \doi10.1029/95RG02097, 1995.; Holzer, M. and Hall, T M.: Transit-time and tracer-age distributions in geophysical flows, J. Atmos. Sci., 57(21), 3539–3558, 2000.; Issartel, J.-P. and Baverel, J.: Inverse transport for the verification of the Comprehensive Nuclear Test Ban Treaty, Atmos. Chem. Phys., 3, 475–486, 2003; Lefèvre, F., Brasseur, G P., Folkins, I., Smith, A K., and Simon, P.: Chemistry of the 1991–1992 stratospheric winter: three dimensional model simulations, J Geophys. Res., 99, 8183–8195, \doi10.1029/93JD03476, 1994.; Lefèvre, F., Figarol, F., Carslaw, K S., and Peter, T.: The 1997 Arctic ozone depletion quantified from three dimensional model simulations, Geophys. Res. Lett., 25(13), 2425–2428, \doi10.1029/98GL51812, 1998.; Legras, B., Pisso, I., Lefèvre, F., and Berthet, G.: Variability of the Lagrangian turbulent diffusion in the lower stratosphere, Atmos. Chem. Phys., 5, 1605–1622, 2005.; McCormick, M P. and Veiga, R E.: SageII Measurements of early Pinatubo aerosols, Geophys. Res. Lett., 19(2), 155–158, \doi10.1029/91GL02790, 1992.; Morse, P M. and Feshbach, H.: Methods of theoretical physics, Mc-Graw-Hill, Part I, pp. 857–859, 1953.; Neu, J L. and Plumb, R A.: Age of air in a leaky pipe model of stratospheric transport, J Geophys. Res., 104(D16), 19 243–19 255, \doi10.1029/1999JD900251, 1999.; Pierrehumbert, R T. and Yang, H.: Global chaotic mixing on isentropic surfaces, J. Atmos. Sci., 50(15), 2462–2480, 1993.; Pommereau, J., Garni


 

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