Transport Diagnostics of GCMs and Implications for 2D Chemistry-Transport Model of Troposphere and Stratosphere
| Autor: | Victor L. Dvortsov, V. A. Yudin, Sergey P. Smyshlyaev, Marvin A. Geller |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Journal of the Atmospheric Sciences. 57:673-699 |
| ISSN: | 1520-0469 0022-4928 |
| DOI: | 10.1175/1520-0469(2000)057<0673:tdogai>2.0.co;2 |
| Popis: | The middle atmosphere version of NCAR Community Climate Model (MACCM2) and the GEOS-STRATAN data assimilation system (DAS) of NASA/GSFC have been used to generate a zonally averaged set of transport parameters (meridional circulation and resolved eddy mixing) for use in two-dimensional (2D) chemistry transport models (CTMs). This was done by performing 3D transport numerical experiments with two orthogonal tracers. Some transport diagnostics from the MACCM2 and DAS are compared with each other, and with other approaches and estimates of horizontal mixing (Kyy) obtained from satellite data and GCMs. Some differences in the derived Kyy values for these passive tracer experiments and using the potential vorticity (PV) methods are discussed, as well as the annual and interannual variations, and the interhemispherical asymmetries in Kyy structures. The set of 2D parameters obtained from the MACCM2 transport diagnostics has been used in a 2D CTM to simulate the distribution of CH4, N2O, O3, and the age... |
| Databáze: | OpenAIRE |
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