Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 10 1 2010 10.5194/acp-10-121-2010 http://www.atmos-chem-phys.net/10/121/2010/ http://www.atmos-chem-phys.net/10/121/2010/acp-10-121-2010.html http://www.atmos-chem-phys.net/10/121/2010/acp-10-121-2010.pdf 121 132 2010-01-11 Annual cycle of ozone at and above the tropical tropopause: observations versus simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) P. Konopka p.konopka@fz-juelich.de J.-U. Grooß G. Günther F. Ploeger R. Pommrich R. Müller N. Livesey Forschungszentrum Jülich (ICG-1: Stratosphere), Jülich, Germany Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA Multi-annual simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) were conducted to study the seasonality of O₃ within the stratospheric part of the tropical tropopause layer (TTL), i.e. above θ=360 K potential temperature level. In agreement with satellite (HALOE) and in-situ observations (SHADOZ), CLaMS simulations show a pronounced annual cycle in O₃, at and above θ=380 K, with the highest mixing ratios in the late boreal summer. Within the model, this cycle is driven by the seasonality of both upwelling and in-mixing. The latter process occurs through enhanced horizontal transport from the extratropics into the TTL that is mainly driven by the meridional, isentropic winds. The strongest in-mixing occurs during the late boreal summer from the Northern Hemisphere in the potential temperature range between 370 and 420 K. Complementary, the strongest upwelling occurs in winter reducing O₃ to the lowest values in early spring. Both CLaMS simulations and Aura MLS O₃ observations consistently show that enhanced in-mixing in summer is mainly driven by the Asian monsoon anticyclone. Andrews, D G., Holton, J R., and Leovy, C B.: Middle Atmosphere Dynamics, Academic Press, San Diego, USA, 1987. Avallone, L M. and Prather, M J.: Tracer-tracer correlations: Three-dimensional model simulations and comparisons to observations, J Geophys. Res., 102, 19233–19246, 1997. Borchi, F., Pommereau, J.-P., Garnier, A., and Pinharanda, M.: Evaluation of SHADOZ sondes, HALOE and SAGE~II ozone profiles at the tropics from SAOZ~UV-Vis remote measurements onboard long duration balloons, Atmos. Chem. Phys., 5, 1381–1397, 2005. Chae, J H. and Sherwood, S C.: Annual temperature cycle of the tropical tropopause: A simple model study, J Geophys. Res., 112, 1–10, 2007. Chen, P.: Isentropic cross-tropopause mass exchange in the extratropics, J Geophys. Res., 100, 16661–16673, 1995. Dethof, A., O'Neill, A., Slingo, J M., and Smit, H. G J.: A mechanism for moistening the lower stratosphere involving the Asian summer monsoon, Q J Roy. Meteorol. Soc., 556(125), 1079–1106, 1999. Folkins, I., Loewenstein, M., Podolske, J., Oltmans, S J., and Proffitt, M.: A barrier to vertical mixing at 14 km in the tropics: Evidence from ozonesondes and aircraft measurements, Geophys. Res. Lett., 104, 22095–22102, 1999. Folkins, I., Bernath, P., Boone, C., Lesins, G., Livesey, N., Thompson, A M., Walter, K., and Witte, J C.: Seasonal cycles of O₃, CO, and convective outflow at the tropical tropopause, Geophys. Res. Lett., 33, L16802, \doi10.1029/2006GL026602, 2006. Fueglistaler, S., Dessler, A E., Dunkerton, T J., Folkins, I., Fu, Q., and Motte, P W.: Tropical tropopause layer, Rev. Geophys., 47, RG1004, \doi10.1029/2008RG000267, 2009a. Fueglistaler, S., Legras, B., Beljaars, A., Morcrette, J.-J., Simmons, A., Tompkins, A M., and Uppapla, S.: The diabatic heat budget of the upper troposphere and lower/mid stratosphere in ECMWF reanalysis, Q J Roy. Meteorol. Soc., 135, 21–37, \doi10.1002/qj.361, 2009b. Gettelman, A., de~F Fujiwara, P M., Fu, Q., Vömel, H., Gohar, L K., Johanson, C., and Aaammerman, M.: Radiation balance of the tropical tropopause layer, J Geophys. Res., 109, D07103, \doi10.1029/2003JD004190, 2004. Grooß, J.-U.: Modelling of Stratospheric Chemistry based on HALOE/UARS Satellite Data, PhD thesis, University of Mainz, 1996. Grooß, J.-U. and Russell~III, J. M.: Technical note: A stratospheric climatology for O₃, H₂O, CH₄, NO_x, HCl and HF derived from HALOE measurements, Atmos. Chem. Phys., 5, 2797–2807, 2005. Haynes, P. and Shuckburgh, E.: Effective diffusivity as a diagnostic of atmospheric transport, 2, Troposphere and lower stratosphere, J Geophys. Res., 105, 22795–22810, 2000. Konopka, P., Günther, G., Müller, R., dos Santos, F. H. S., Schiller, C., Ravegnani, F., Ulanovsky, A., Schlager, H., Volk, C. M., Viciani, S., Pan, L. L., McKenna, D.-S., and Riese, M.: Contribution of mixing to upward transport across the tropical tropopause layer (TTL), Atmos. Chem. Phys., 7, 3285–3308, 2007. Konopka, P., Grooß, J.-U., Plöger, F., and Müller, R.: Annual cycle of horizontal in-mixing into the lower tropical stratosphere, J. Geophys. Res., 114, D19111, doi:10.1029/2009JD011955, 2009. Krüger, K., Tegtmeier, S., and Rex, M.: Variability of residence time in the Tropical Tropopause Layer during Northern Hemisphere winter, Atmos. Chem. Phys., 9, 6717–6725, 2009. Livesey, N J., Filipiak, M J., Froidevaux, L., Read, W G., Lambert, A., Santee, M L., Jiang, J H., Pumphrey, H C., Waters, J W., Cofield, R E., Cuddy, D T., Daffer, W H., Drouin, B J., Fuller, R A., Jarnot, R F., Jiang, Y B., Knosp, B W., Li, Q B., Perun, V S., Schwartz, M J., Snyder, W V., Stek, P C., Thurstans, R P., Wagner, P A., Avery, M., Browell, E V., Cammas, J.-P., Christensen, L E., Diskin, G S., Gao, R.-S., Jost, H.-J., Loewenstein, M., Lopez, J D., Nedelec, P., Osterman, G B., Sachse, G W., and Webster, C R.: Validation of Aura Microwave Limb Sounder O₃ and CO observations in the upper troposphere and lower stratosphere, J Geophys. Res., 113, D15S02, \doi10.1029/2007JD008805, 2008. Mahowald, N M., Plumb, R A., Rasch, P J., del Corral, J., and Sassi, F.: Stratospheric transport in a three-dimensional isentropic coordinate model, J Geophys. Res., 107(D15), 4254, \doi10.1029/2001JD001313, 2002. Marcy, T P., Popp, P J., Gao, R S., Fahey, D W., Ray, E A., Richard, E C., Thompson, T L., Atlas, E L., Loewenstein, M., Wofsy, S C., Park, S., Weinstock, E M., Swart, W H., and Mahoney, M J.: Measurements of trace gases in the tropical tropopause layer, Atmos. Environ., 41, 7253–7261, 2007. McKenna, D S., Konopka, P., Grooß, J.-U., Günther, G., Müller, R., Spang, R., Offermann, D., and Orsolini, Y.: A new Chemical Lagrangian Model of the Stratosphere (CLaMS): 1 Formulation of advection and mixing, J Geophys. Res., 107(D16), 4309, \doi10.1029/2000JD000114, 2002. Morcrette, J.-J.: Radiation and Cloud Radiative Properties in the European Centre for Medium-Range Weather Forecasts Forecasting System, J Geophys. Res., 96(D5), 9121–9132, 1991. Mote, P W., Dunkerton, T J., McIntyre, M E., Ray, E A., Haynes, P H., and Russell~III, J M.: Vertical velocity, vertical diffusion, and dilution by midlatitude air in the tropical lower stratosphere, J Geophys. Res., 103, 8651–8666, 1998. Niwano, M., Yamazaki, K., and Shiotani, M.: Seasonal and QBO variations of ascent rate in the tropical lower stratosphere as inferred from UARS HALOE trace gas data, J Geophys. Res., 108(D24), 4794, \doi10.1029/2003JD003871, 2003. Park, M., Randel, W J., Emmons, L K., Bernath, P F., Walker, K A., and Boone, C D.: Chemical isolation in the Asian monsoon anticyclone observed in Atmospheric Chemistry Experiment (ACE-FTS) data, J Geophys. Res., 112, D16309, \doi10.1029/2006JD008294, 2007. Park, M., Randel, W. J., Emmons, L. K., Bernath, P. F., Walker, K. A., and Boone, C. D.: Chemical isolation in the Asian monsoon anticyclone observed in Atmospheric Chemistry Experiment (ACE-FTS) data, Atmos. Chem. Phys., 8, 757–764, 2008. Ploeger, F., Konopka, P., Günther, G., Grooß, J.-U., and Müller, R.: Impact of the vertical velocity scheme on modeling transport across the tropical tropopause layer, J Geophys. Res., \doi10.1029/2009JD012023, in press, 2009. Plumb, R A.: A "tropical pipe" model of stratospheric transport, J Geophys. Res., 101, 3957–3972, 1996. Randel, W J. and Park, M.: Deep convective influence on the Asian summer monsoon anticyclone and associated tracer variability observed with Atmospheric Infrared Sounder (AIRS), J Geophys. Res., 111, D12314, \doi10.1029/2005JD006490, 2006. Randel, W J., Park, M., Wu, F., and Livesey, N.: A large annual cycle in ozone above the tropical tropopause linked to the Brewer-Dobson circulation, J Atmos. Sci., 64, 4479–4488, 2007. Read, W. G., Schwartz, M. J., Lambert, A., Su, H., Livesey, N. J., Daffer, W. H., and Boone, C. D.: The roles of convection, extratropical mixing, and in-situ freeze-drying in the Tropical Tropopause Layer, Atmos. Chem. Phys., 8, 6051–6067, 2008. Ricaud, P., Barret, B., Attié, J.-L., Motte, E., Le Flochmo\"en, E., Teyssèdre, H., Peuch, V.-H., Livesey, N., Lambert, A., and Pommereau, J.-P.: Impact of land convection on troposphere-stratosphere exchange in the tropics, Atmos. Chem. Phys., 7, 5639–5657, 2007. Rosenlof, K H.: Seasonal cycle of the residual mean meridional circulation in the stratosphere, J Geophys. Res., 100, 5173–5191, 1995. Schoeberl, M R., Kawa, S R., Douglass, A R., Waters, J., Livesey, N., Read, W., and Filipiak, M.: The carbon monoxide tape recorder, Geophys. Res. Lett., 33, L12811, \doi10.1029/2006GL026178, 2006. Schoeberl, M R., Douglass, A R., Newman, P A., Lait, L R., Lary, D., Waters, J., Livesey, N., Froidevaux, L., Lambert, A., Read, W., Filipiak, M J., and Pumphrey, H C.: QBO and annual cycle variations in tropical lower stratosphere trace gases from HALOE and Aura MLS observations, J Geophys. Res., 113, D05301, \doi10.1029/2007JD008678, 2008. Thompson, A M., Witte, J C., Smit, H. G J., Oltmans, S J., Johnson, B J., Kirchhoff, V W., and Schmidlin, F J.: Southern Hemisphere Additional Ozonesondes (SHADOZ) 1998–2004 tropical ozone climatology: 3 Instrumentation, station-to-station variability, and evaluation with simulated flight profiles, J Geophys. Res., 112, D03304, 1297–1300, \doi10.1029/2005JD007042, 2007. Tuck, A F., Baumgardner, D., Chan, K R., Dye, J E., Elkins, J W., Hovde, S J., Kelly, K K., Loewenstein, M., Margitan, J J., May, R D., Podolske, J R., Proffitt, M H., Rosenlof, K H., Smith, W L., Webster, C R., and Wilson, J C.: The Brewer-Dobson circulation in the light of high altitude in situ aircraft observation, Q J Roy. Meteorol. Soc., 123, 1–69, 1997. Volk, C M., Elkins, J W., Fahey, D W., Salawitch, R J., Dutton, G S., Gilligan, J M., Proffitt, M H., Loewenstein, M., Podolske, J R., Minschwaner, K., Margitan, J J., and Chan, K R.: Quantifying transport between the tropical and mid-latitude lower stratosphere, Science, 272, 1763–1768, 1996. Yang, Q., Fu, Q., Austin, J., Gettelman, A., Li, F., and Vömel, H.: Observationally derived and general circulation model simulated tropical stratospheric upward mass fluxes, J Geophys. Res., 113, D00B07, doi:10.1029/2008JD009945, 2008. Zhou, J. and Lau, K M.: Does a Monsoon Climate Exist over South America?, J Climate, 11, 1020–1040, 1998.