A New Detailed Plasma‐Chemistry Model for the Potential Impact of Blue Jet Streamers on Atmospheric Chemistry

Abstract

A detailed ion-neutral chemistry model named MiPO-Streamer model has been developed to simulate the impact of blue jet streamers on stratospheric chemistry. It is based on the MiPLaSMO model (Microphysical and Photochemical Lagrangian Stratospheric Model of Ozone) widely used over the last 20 years to interpret balloon and satellite measurements associated with stratospheric ozone. In this study, instead of using a reduced electric field with constant value during blue jet streamer discharge process, we used a time-dependent reduced electric field coming from an explicit streamer model. The simulations are performed on daytime/nighttime and in 2-day long-term duration at 27 km where the catalytic cycle of NO x is the most efficient to destroy ozone. Among 117 species considered, we put the focus on nitrogen, oxygen, chlorine, and bromine species, and ozone perturbation. The model results indicate that the densities of neutral species through an electrodynamic streamer simulation show an impact of a factor 2 as compared to the pulse-based simulation at 27 km.

The Design of a Python Library for the Automatic Definition and Simulation of Transient Ionization Fronts

“…In section IV-A, the ChargedSpecies() class was described, which is used to define a single charged species. However, in many nonthermal plasma applications, e.g., [7], [15], knowledge of the plasma composition, and of the exact combination of charged species developed during a discharge, is of critical importance. Manual definition of each individual species using ChargedSpecies() would be tedious and error-prone.…”

“…Specialized schemes using custom codes, employing techniques which are particularly effective for multiscale modelling have also been developed, and demonstrate major advances in computational efficiency and speed [13], [14]. The popularity of these methods has grown rapidly, with models that incorporate aspects such as complex plasma chemistry [15], nonuniform electric fields [16], and solid dielectric boundaries [17], [18], becoming increasingly prevalent. Currently, the software developed must typically strike a balance between issues such as computational speed, resource usage, accessibility, adaptability, accuracy, and model fidelity.…”

Detailed Modeling and Evaluation of the Potential Impact of Blue Jet on the Atmospheric Chemistry

“…3 of 15 bromine chemical families associated with stratospheric ozone as well as the ions and excited species. A detailed description of the streamer part of the model and its validation exercise at 27 km can be found in Xu et al (2020). To investigate the chemical processes associated with a single streamer and leader of BJ, the effect of convection is not considered in this model.…”

“…Compare to the model studies of Mishin (1997), Smirnova et al (2003), and Winkler and Notholt (2015), Xu et al (2020) developed a detailed plasma chemistry model for representing the BJ streamer, which used the realistic reduced electric field and performed the simulation over several days. Xu et al (2020) only revealed the chemical impact of BJ streamer at 27 km, and did not consider the impact of BJ leader and these impacts on the whole stratospheric profile. Winkler and Notholt (2015) did a model study on the chemical impact of BJ leader.…”

Untitled

“…Nous ne pouvons pas prendre les taux de réaction inverse et direct directement dans la littérature. En effet, les taux de réaction sont souvent mal connus et doivent être choisis avec précaution [11] et il est nécessaire d'obtenir la concentration de l'équilibre chimique lorsque le mélange est stable dans le temps. C'est-à-dire au bout d'un temps suffisamment long.…”