Journal article
pyGPI5: A python D- and E-region chemistry and ionization model
Frontiers in astronomy and space sciences, Vol.9, 1028042
12/06/2022
DOI: 10.3389/fspas.2022.1028042
Abstract
We present a Python implementation of a D- and E-region chemistry and ionization code called pyGPI5. Particle precipitation that penetrates into the E- and D-region of the ionosphere-thermosphere causes significant enhancements of the electron density. Dissociative recombination of molecular ions with electrons is the primary electron loss mechanism in the E-region, down to approximately 85 km. However, below 85 km, chemical processes become significantly more complicated with positive and negative ions being generated in addition to electrons. The complex D-region ion chemistry has been known for many decades. We present a formulation to quantify the concentrations of four ion species composed of positive and negative, light and heavy ions, and the electrons. The implementation we describe in this investigation solves five ordinary stiff differential equations simultaneously. We present an overview of the code, along with discussions of the reaction rates, and assumptions used in the model. We describe an implementation of the electron transport model to quantify the altitude ionization profile caused by energetic particle precipitation. We show how to instantiate the model, generate the ion and electron profiles as a function of altitude for background conditions, how to generate altitude ionization profiles, and running the code to produce ion and electron profiles caused by energetic particle precipitation. Recent investigations that have used a D-region chemistry model are discussed, along with some applications.
Details
- Title: Subtitle
- pyGPI5: A python D- and E-region chemistry and ionization model
- Creators
- Stephen R. Kaeppler - Clemson UniversityRobert Marshall - University of Colorado BoulderEnnio R. Sanchez - SRI InternationalDiana H. Juarez H. Madera - Vaughn College of Aeronautics and TechnologyRiley Troyer - University of IowaAllison N. Jaynes - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Frontiers in astronomy and space sciences, Vol.9, 1028042
- DOI
- 10.3389/fspas.2022.1028042
- ISSN
- 2296-987X
- eISSN
- 2296-987X
- Publisher
- Frontiers Media Sa
- Number of pages
- 10
- Grant note
- FA9550-19-1-0130 / Air Force Office of Scientific Research Grant; United States Department of Defense; Air Force Office of Scientific Research (AFOSR) AGS-1732365 / NSF Collaborative Research Grant; National Science Foundation (NSF)
- Language
- English
- Date published
- 12/06/2022
- Academic Unit
- Physics and Astronomy; University College Courses
- Record Identifier
- 9984428823902771
Metrics
11 Record Views