Dynamics and chemistry of vortex remnants in late Arctic spring 1997 and 2000 : simulation with the chemical Lagrangian model of the stratosphere (CLaMS) - Konopka, Paul; Grooß, J.-U.; Bausch, S.; Müller, R.; McKenna, D. S.; Elkins, J. W.; Schmidt, U.; Toon, G. (2002)