HR: 1340h
AN: A13D-0961    [Abstracts]
TI: Modelling Arctic Ozone Loss: Effects of Temperature on Interannual Variability
AU: * Podolske, J R
EM: James.R.Podolske@nasa.gov
AF: NASA Ames Research Center, Earth Science Division MS 245-5, Moffett Field, CA 94035-1000 United States
AU: Drdla, K
EM: Katja.Drdla@nasa.gov
AF: NASA Ames Research Center, Earth Science Division MS 245-5, Moffett Field, CA 94035-1000 United States
AB: Observations have shown that Arctic ozone loss is strongly correlated with the extent of cold temperatures over the course of the winter. In order to understand this relationship, a model has been used to simulate Arctic stratospheric evolution and ozone loss for each of the last 14 winters. The model includes detailed polar stratospheric cloud microphysics, allowing realistic calculations of denitrification, and comprehensive chemistry. Using the model, it is possible to quantify the relationships between specific factors (i.e., chlorine activation, denitrification, aerosol loading, and exposure to sunlight), ozone loss, and cold temperatures. An understanding of the mechanisms causing the observed ozone loss trends will allow more reliable estimates of the potential for future ozone loss.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005