Sciences and Exploration Directorate

Tre'Shunda James

(NASA POSTDOCTORAL PROGRAM FELL)

Tre'Shunda James's Contact Card & Information.
Email: treshunda.james@nasa.gov
Org Code: 673
Address:
NASA/GSFC
Mail Code 673
Greenbelt, MD 20771
Employer: NPP POST-DOC CONTRACT

Brief Bio



My interests include, but are not limited to: heliophysics, space physics, upper atmosphere and ionosphere, magnetosphere-ionosphere coupling, and exoplanets.


Early in my research career, I researched habitability of exoplanets by modeling theoretical abiotic terrestrial atmospheres and analyzing their simulated atmospheric composition for biosignatures. More recently, I have become more enamored with the near-Earth environment. My dissertation thesis is a model-observation comparative study of the ionospheric current systems. Using SuperMAG and AMPERE datasets, I have quantified the relationship between field-aligned currents and the auroral electrojet. Additionally, I have quantified the seasonal asymmetry in these currents for the first time using the SME index. As a natural segue, I have investigated global MHD models’ ability to reproduce the observed interhemispheric asymmetries, magnitudes, and relationship of the electrojets and FACs. I have determined that the Space Weather Modeling Framework does reproduce the current-closure relationship, despite underestimating the currents and its inability to replicate reality. Currently, I am working on expanding my previous research by validating the behavior of the small-scale structure structure of these FACs as well as these currents relationship to particle precipitation. This work will quantify the model's performant using skill scores and contingency tables for dichotomous forecasts. The results will reveal weaknesses and highlight when and where the models perform best. Which is imperative to the advancement of the space weather prediction as these models are at the forefront of space weather modeling forecasts.


A long-term goal of mine is to become a PI on a NASA mission. Ideally this mission would be just as interdisciplinary as my interest. 

Positions/Employment


Graduate Research Assistant

University of Texas at Arlington - Arlington, Texas

2019 - 2023

Observation and Model Comparisons of Interhemispheric Asymmetry in Ionospheric Current System, University of Texas at Arlington

Advisor: Ramon E. Lopez

  • Comparative studies of seasonally driven interhemispheric asymmetries in ionospheric current systems as seen by observations and replicated by global MHD models. 
  • This work is supported by the US National Science Foundation (NSF) under Grant No. 1916604, the National Aeronautics and Space Administration (NASA) under Grant No. 80NSSC21K2057, and Grant No. 80NSSC20K0606 (The Center for the Unified Study of Interhemispheric Asymmetries (CUSIA)). 


Undergraduate Research Intern

NASA Jet Propulsion Laboratory - Pasadena, California

2017 - 2018

  • Studied the behavior of photochemical oxygen in CO-2 dominated atmospheres while varying atmospheric surface pressure and emission rates, using Hu et al. (2014) photochemistry model.
  • Modeled ~60 theoretical terrestrial exoplanet atmospheres.
  • Presented research findings to senior scientists regularly.
  • This work was done with the support of the US National Science Foundation’s (NSF) Division Of Undergraduate Education (DUE), under grant No.1457943

Teaching Experience


Graduate Teaching Assistant. University of Texas at Arlington. Arlington, Tx.

  • General College Physics, 1441

Education


Ph.D. Physics and Applied Physics (2023). University of Texas at Arlington. Arlington, Texas

  • Dissertation: " Model and Observation Comparisons of Ionospheric Current Systems.". Advisor: Ramon E. Lopez

B.A. Physics (2019). (Minor: Chemistry). Occidental College. Los Angeles, California

Professional Service


Executive Secretary (2023). NASA Review Panel.

Reviewer (2023 (x2)). Journal of Geophysical Research - Space Physics.

Awards


NASA Postdoctoral Program Fellowship. March 2023.

NASA MSI Graduate Fellowship. 2021.

NASA Texas Space Grant Consortium Fellowship. 2021.

Texas APS Outstanding Graduate Student Presentation. 2020

Special Experience


Heliophysics Mission Design School (2024). NASA Jet Propulsion Laboratory, Los Angeles, California (Hybrid).

2nd Iberian Space Science Summer School (i4s)(2022). University of Alcalá. Alcalá de Henares, Spain.

Publications


Refereed

2023. "Quantifying the ability of magnetohydrodynamic models to reproduce observed Birkeland current and auroral electrojet magnitudes." Frontiers in Astronomy and Space Sciences 10 [10.3389/fspas.2023.1212735] [Journal Article/Letter]

2022. "The effect of F10.7 on interhemispheric differences in ionospheric current during solstices." Advances in Space Research 69 (8): 2951-2956 [10.1016/j.asr.2022.02.006] [Journal Article/Letter]

2018. "Photochemical Oxygen in Non-1-bar CO2 Atmospheres of Terrestrial Exoplanets." The Astrophysical Journal 867 (1): 17 [10.3847/1538-4357/aae2bb] [Journal Article/Letter]

Talks, Presentations and Posters


Other

Quantifying the Ability of Magnetohydrodynamic Models to Reproduce Observed Ionospheric Current Systems 

2023

Poster. Geospace Environment Modeling Meeting. San Diego, California.


Investigating Seasonal Effect of Relative Electrojet Activity on the Day Side and Night Side. 

2022

Poster. Geospace Environment Modeling Meeting. Honolulu, Hawaii. 


Investigating Seasonal Effect of Relative Electrojet Activity on the Day Side and Night Side 

2022

Poster. Committee on Space Research Meeting. Athens, Greece. 


Quantifying the Ability of Magnetohydrodynamic Models to Reproduce Observed Ionospheric Current Systems 

2022

Poster. Texas Section American Physical Society Meeting. Houston, Texas. 


Quantifying the Ability of Magnetohydrodynamic Models to Reproduce Observed Ionospheric Current Systems. 

2022

Poster. American Geophysical Union. Chicago, Illinois. 


The Effect of Interhemispheric Conductivity Differences During Solstice on the Ionospheric Current System. 

2021

Poster. American Geophysical Union. New Orleans, LA. 


Estimate of Interhemispheric Conductivity Differences Using SME and IMF Bz. 

2020

Poster. American Geophysical Union Meeting. Virtual. 


Estimate of Interhemispheric Conductivity Differences Using SuperMag Electrojet Index and Interplanetary Magnetic Field Bz

2020

Poster. Texas Section American Physical Society Meeting. Virtual. 


Estimate of Interhemispheric Conductivity Difference Using SME and IMF Bz. 

2020

Poster. Geospace Environment Modeling Meeting. Virtual. 


Photochemical Oxygen in Non-1-bar CO2 Atmospheres of Terrestrial Exoplanets

2018

Oral. American Astronomical Society Meeting. Knoxville, TN. 2018.