Abstract
Abstract. Recent observational and modeling studies show that variations of stratospheric ozone and the resulting interaction between ozone and the stratospheric circulation play an important role in surface weather and climate. However, in many cases, computationally expensive coupled chemistry models have been used to study these effects. Here, we demonstrate how a much simpler idealized general circulation model (GCM) can be used for studying the impact of interactive stratospheric ozone on the circulation. The model, named Simplified Chemistry-Dynamical Model (SCDM V1.0), is constructed from a preexisting idealized GCM, into which a simplified linear ozone scheme and a parameterization for the shortwave radiative effects of ozone are implemented. The distribution and variability of stratospheric ozone simulated by the new model are in good agreement with the MERRA2 reanalysis, even for extreme circulation events such as Arctic stratospheric sudden warmings. The model thus represents a promising new tool for the study of ozone–circulation interaction in the stratosphere and its associated effects on tropospheric weather and climate.
Highlights
Idealized models are becoming increasingly popular for the study of phenomena that are too difficult to understand with more comprehensive models
We implement the shortwave parameterization by Lacis and Hansen (1974) into the Simplified Chemistry-Dynamical Model (SCDM) to describe the absorption of solar radiation by ozone in the ultraviolet (λ 0.35 μm) and visual (0.5 μm λ 0.7 μm) parts of the spectrum
We introduce a dry dynamical core model with interactive ozone, denoted Simplified Chemistry-Dynamical Model (SCDM)
Summary
Idealized models are becoming increasingly popular for the study of phenomena that are too difficult to understand with more comprehensive models. Some modeling studies have already suggested a stronger stratosphere–troposphere interaction when interactive ozone is introduced in their simulations (Haase and Matthes, 2019; Li et al, 2016; Lin and Ming, 2021; Romanowsky et al, 2019), but these studies were based on full climate models coupled to chemistry modules of different complexities Most of these models have a large computational burden and are often difficult to understand. The model creates realistic simulations of the global circulation, ozone distribution, and the diabatic heating by ozone, and the model produces faithful life-cycle composites of stratospheric sudden warming events (SSWs) This underlines the potential of the model to study the role of ozone in the dynamical variability of the atmosphere. 5. SCDM consists of an idealized general circulation model (GCM), a simplified linear photochemical ozone scheme, and a shortwave parameterization for the radiative effects of ozone.
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