Simulation of denitrification and ozone loss for the Arctic winter 2002/2003
Item
Title (Dublin Core)
Simulation of denitrification and ozone loss for the Arctic winter 2002/2003
Description (Dublin Core)
We present simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) for the Arctic winter 2002/2003. We integrated a Lagrangian denitrification scheme into the three-dimensional version of CLaMS that calculates the growth and sedimentation of nitric acid trihydrate (NAT) particles along individual particle trajectories. From those, we derive the HNO<sub>3</sub> downward flux resulting from different particle nucleation assumptions. The simulation results show a clear vertical redistribution of total inorganic nitrogen ( ), with a maximum vortex average permanent removal of over 5ppb in late December between 500 and 550K and a corresponding increase of of over 2ppb below about 450K. The simulated vertical redistribution of is compared with balloon observations by MkIV and in-situ observations from the high altitude aircraft Geophysica. Assuming a globally uniform NAT particle nucleation rate of 7.8x10<sup>-6</sup>cm<sup>-3</sup>h<sup>-1</sup> in the model, the observed denitrification is well reproduced. <P style="line-height: 20px;"> In the investigated winter 2002/2003, the denitrification has only moderate impact (≤14%) on the simulated vortex average ozone loss of about 1.1ppm near the 460K level. At higher altitudes, above 600K potential temperature, the simulations show significant ozone depletion through -catalytic cycles due to the unusual early exposure of vortex air to sunlight.
Creator (Dublin Core)
Grooß, J.-U.
Günther, G.
Müller, R.
Konopka, P.
Bausch, S.
Schlager, H.
Voigt, C.
Volk, C.M.
Toon, G. C.
Date (Dublin Core)
2018-06-28
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-5-1437-2005
https://acp.copernicus.org/articles/5/1437/2005/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
