This session is focused on the study of specific processes (radiative, dynamical, chemical and microphysical) that are relevant to the stratosphere. Either fundamental processes, or well-identified coupled processes, are appropriate. Special attention will be devoted to those areas represented by the existing SPARC process-based initiatives: upper tropospheric and lower stratospheric chemical and microphysical processes, including heterogeneous and multiphase chemistry; tropical upwelling and dehydration; transport and mixing in the lower stratosphere; gravity wave measurements and parameterizations.

Subsession 1-1: Chemistry

M. Gauss: 3-D CTM Model Calculations of Chemical and Dynamical Processes in the Lower Stratosphere (O/1-1.5)

Subsession 1-2: Transport

R.K. Scott: Isentropic transport and mixing rates across the tropopause(O/1-2.2)

H. Kanzawa: Isolation of the polar vortex estimated by the time threshold diagnostics(O/1-2.10)

Subsession 1-3: Clouds and Water Vapour

F. Hasebe : Initial Results from SOWER/Pacific 1998-2000 Campaigns (O/1-3.2)

X. Zhou: Variability of the tropical cold point tropopause and its implications for stratospheric water vapor(O/1-3.3)

S. Sherwood: Evidence of rapid dehydration and mixing within a tropical tropopause layer (O/1-3.4)

A. Gettelman: The distribution and influence of convection in the tropical tropopause region (O/1-3.5)

Subsession 1-4: Gravity Waves

T. Tsuda: A global morphology of gravity wave activity in the stratosphere revealed by the GPS occultation data (GPS/MET) (O/1-4.1)

K. Sato: Layered disturbances associated with low potential vorticity revealed by high-resolution radiosonde observation in Japan (O/1-4.5)

Subsession 1-5: Tropical Oscillations

A.A Scaife: Quasi-biennal oscillations in a realistic simulation of the global climate (O/1-5.2)

Subsession 1-1: Chemistry

K. Sudo: Modeling study of stratospheric effect on the distribution and budget of tropospheric ozone, and its annual variation (P/1-1.1)

H. Teyssedre: Coupling the ARPEGE General Circulation Model to the stratospheric/tropospheric MOCAGE Chemistry-Transport Model: climate studies (P/1-1.5)

T. Reddmann: 3D model simulation of SF6 with mesospheric chemistry (P/1-1.6)

R. Taccone: Theoretical analysis of the relative reactivity of chloroethenes with O(³P), Cl(²P), and Br(²P) atoms and with OH and NO₃ radicals (P/1-1.10)

G. Arguello: Photochemistry of fluorinated compounds. Kinetic of the reaction between CF₃CF₂ and FCO radicals (P/1-1.11)

Subsession 1-2: Polar Processes and Transport

F. Fierli: Transport of chemically activated air to middle latitudes in the Northern Hemisphere 1995 to 1997 winters (P/1-2.1)

M. Mueller: Polar stratospheric clouds and mesoscale dynamics (P/1-2.5)

G. Bianchini: Measurement of O₃, HNO₃, N₂O, and CLO in the southern polar stratosphere by far-infrared limb-sounding from high altitude aircraft (P/1-2.6)

J.A. Karhu: A study of ozone filaments at Marambio, Antarctica during APE-GAIA campaign in September-October 1999" (P/1-2.10)

H. Nakajima: Meridional transport of minor species at the time of break-up of polar vortex observed by ILAS (P/1-2.11)

S. Yoden: Chaotic mixing and transport barrier in an idealized stratospheric polar vortex (P/1-2.14)

Subsession 1-3: Mid-latitude and Tropical Transport

F. Chane-Ming: A climatology of laminae in ozone sonde data in the upper troposphere and lower stratosphere at La Réunion island (P/1-3.4)

T. Portafaix: A case study of isentropic exchange through the southern dynamical barrier limiting the tropical stratosphere. (P/1-3.8)

H. Bencherif: A case study of sporadic transport across the southern boundary of the tropical stratospheric reservoir (P/1-3.9)

Subsession 1-4: Clouds and Water Vapour

L. Sauvage: Influence of the ageostrophic circulations on the formation and maintain of cirrus clouds at tropopause level at mid latitudes (P/1-4.2)

J. Fortuin: Paramaribo station: analyses of new atmospheric observations in Suriname (P/1-4.7)

M. Van Weele: Year-round spectral UV measurements at tropical Paramaribo, Suriname (P/1-4.8)

M. Rivas: Wavelength dependence of the optical depth of multicomponent aerosols in the north of Chile (P/1-4.9)

Subsession 1-5: Gravity Waves

T. Kerzenmacher: Importance of convection in generating gravity waves (P/1-5.1)

Z. Eitzen: Analysis of numerically simulated gravity waves generated by convection (P/1-5.2)

T. Birner: A ten year climatology of stratospheric gravity-wave activity above southern Germany (P/1-5.7)

M. Geller: Some gravity wave characteristics from analysis of U.S. high resolution radiosonde data for 1998 (P/1-5.8)

I.-S. Song: Characteristics of gravity waves revealed in high-resolution radiosonde observations at Pohang, Korea (P/1-5.9)

M.A. Pulido: The vertical wavenumber power spectrum resulting from the propagation of a gravity wave spectrum under non-linear advective interactions (P/1-5.11)

M.A. Pulido: The convective instability in a non-linear gravity wave approach (P/1-5.12)

M. Charron: Parameterization of gravity waves emerging from fronts in a general circulation model (P/1-5.14)

Subsession 1-6: Climate Variability

R. Bernardi: Changes in the SH stratospheric polar vortex circulation associated to SST anomalies in the Pacific Ocean. Observed patterns and simulation with GCM (P/1-6.1)

P.K. Vigliarolo: Southern Hemisphere ozone behaviour during 1994 austral winter (P/1-6.6)

C. McLandress: Equatorial oscillations in a middle atmosphere GCM (P/1-6.10)

K. Mohanakumar: Biennal oscillation in temperature and monsoon activity (P/1-6.12)

R.K. Scott: The effect of extratropical wave forcing on tropical upwelling (P/1-6.15)

R. Aroche: The stratospheric aerosols and their influence on the weather and the climate in the Great Caribbean (P/1-6.17)

Subsession 1-7: Recent Ozone Loss

R. de Zafra: Measurements of stratospheric descent rates in the Antarctic vortex core, and estimates of NOy removal during the polar winter (P/1-7.3)