Evaluation of heterogeneous processes in the polar lower stratosphere in the Whole Atmosphere Community Climate Model

摘要: [1] Chemical ozone loss in the polar lower stratosphere is derived from an ensemble of three simulations Whole Atmosphere Community Climate Model (WACCM3) for period 1960–2003, using tracer-tracer correlation technique. We describe a detailed model evaluation region by applying diagnostics such as vortex temperature, sharpness edge, and potential activated chlorine (PACl). Meteorological chemical information about vortex, size, activation time, level equivalent effective stratospheric chlorine, are included PACl. Discrepancies relationship between PACl observations discussed. Simulated Antarctica good agreement with observations, owing to slightly simulated temperatures larger volume than observed. Observed 140 ± 30 DU Antarctic core reproduced WACCM3 simulations. However, horizontal resolution used here (4 × 5) not able simulate observed sharp transport barrier at edge. Therefore does produce homogeneous cold vortex. Warmer outer result less over entire For Arctic, biased high (by 2–3 degrees annual average) significantly smaller Arctic only reaches 20 winters, where suggest ≈80–120 DU.