The coupled atmosphere–chemistry–ocean model SOCOL-MPIOM

作者：Stefan Muthers, Julien Anet, Andrea Stenke, Christoph C. Raible, Eugene Rozanov, Stefan Brönnimann, Thomas Peter, F. Arfeuille, A. I. Shapiro, J. Beer, F. Steinhilber, Yuri Brugnara, W. Schmütz · 发表于：Geoscientific model development · 年份：2014 · DOI：10.5194/gmd-7-2157-2014 · 被引用次数：73 · 研究领域：Atmospheric Ozone and Climate、Atmospheric chemistry and aerosols、Climate variability and models

Abstract. The newly developed atmosphere–ocean–chemistry–climate model SOCOL-MPIOM is presented by demonstrating the influence of chemistry–climate interactions on the climate state and the variability. Therefore, we compare pre-industrial control simulations with (CHEM) and without (NOCHEM) interactive chemistry. In general, the influence of the chemistry on the mean state and the variability is small and mainly restricted to the stratosphere and mesosphere. The atmospheric dynamics mainly differ in polar regions, with slightly stronger polar vortices in the austral and boreal winter, respectively. The strengthening of the vortex is related to larger stratospheric temperature gradients, which are attributed to a parameterisation of the absorption of ozone and oxygen in different wavelength intervals, which is considered in the version with interactive chemistry only. A second reason for the temperature differences between CHEM and NOCHEM is related to diurnal variations in the ozone concentrations in the higher atmosphere, which are missing in NOCHEM. Furthermore, stratospheric water vapour concentrations substantially differ between the two experiments, but their effect on temperature is small. In both setups, the simulated intensity and variability of the northern polar vortex is inside the range of present-day observations. Additionally, the performance of SOCOL-MPIOM under changing external forcings is assessed for the period 1600–2000 using an ensemble of simulations. I...