Two-dimensional model simulations of the QBO in ozone and tracers in the tropical stratosphere

摘要: [1] Meteorological data from the United Kingdom Office (UKMO) and constituent Upper Atmospheric Research Satellite (UARS) are used to construct yearly zonal mean dynamical fields for 1990s use in NASA/Goddard Space Flight Center (GSFC) two-dimensional (2-D) chemistry transport model. This allows interannual variability be included model simulations. In this study, we focus on tropical stratosphere. We find that phase of quasi-biennial oscillation (QBO) signals equatorial CH4 profile total column O3 resolved quite well using empirically based 2-D framework. However, QBO amplitudes constituents systematically underestimated relative observations at most levels. deficiency is probably due part limited vertical resolutions UKMO UARS input sets. different heating rate calculations affects fields, but has little impact phase. Sensitivity tests reveal dominates ozone lower stratosphere, with effect temperature being dominant upper stratosphere via strong dependence loss reaction rates. also odd nitrogen radicals, which caused by modulated NOy, plays a significant not role determining middle The age air good overall agreement determined lower-middle stratospheric OMS balloon SF6 CO2. increases altitude maximizes near 40 km, range 4–5 years over 1993–2000 time period. INDEX TERMS: 0341 Composition Structure: Middle atmosphere—constituent (3334); 3334 Meteorology Dynamics: atmosphere dynamics (0341, 0342); 3337 Numerical modeling assimilation; 3319 General circulation; KEYWORDS: variability, circulation,