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Two years flies by fast
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If there’s anything I could change about the past two years of grad school, I would wish for more time. The time flew by faster than I could’ve ever expected. I wish there was more time to study, more time for projects, more time for friendships, more time for myself. Here’s a recap of how I’ve spent my time.
First ever publication!
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My first ever first-author publication is finally out! Coincidentally, today is also the coldest day I’ve ever experienced in my life.
portfolio
Portfolio item number 1
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Short description of portfolio item number 1
Portfolio item number 2
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publications
Comparing Approximate Total Current of the Dayside Magnetopause to Solar Wind Pressure
Published in University of Texas at Arlington McNair Scholars Research Journal, 2021
We investigated a possible relationship between current along the dayside magnetopause and solar wind pressure, calculated and gathered from THEMIS and OMNIWeb respectively. Results show similar positive statistical correlations between the approximate total current of the dayside magnetopause to solar wind pressure during periods of northward and southward orientation of interplanetary magnetic field.
Recommended citation: Bui, Michelle; Lopez, Ramon. (2021). "Comparing Approximate Total Current of the Dayside Magnetopause to Solar Wind Pressure." University of Texas at Arlington McNair Scholars Research Journal. 24. https://rc.library.uta.edu/uta-ir/handle/10106/29689
Midlatitude Sporadic E-Layer Horizontal Structuring Modulated by Neutral Instability and Mixing in the Lower Thermosphere
Published in Journal of Geophysical Research: Space Physics, 2023
We consider whether neutral instability and turbulence in the lower thermosphere is the likely cause for some of the structuring in the sporadic-E layers. Results of 3D numerical simulations of atmospheric dynamics in the mesosphere to lower thermosphere support the proposition. Future work involves coupling ion-neutral dynamics to further support sporadic-E layer structuring caused by convective instabilities in the neutral atmosphere.
Recommended citation: Bui, Michelle; Hysell, David; Larsen, Miguel. (2023). "Midlatitude Sporadic E-Layer Horizontal Structuring Modulated by Neutral Instability and Mixing in the Lower Thermosphere." Journal of Geophysical Research: Space Physics. 128(2). https://doi.org/10.1029/2022JA030929
Space weather disrupts nocturnal bird migration
Published in Proceedings of the National Academy of Sciences (PNAS), 2023
Birds and other animals depend on Earth’s magnetic field for long-distance navigation during their seasonal migrations. However, the magnetic field is regularly disrupted by bursts of solar energy, which may temporarily decrease its reliability for navigation. We used long-term datasets derived from Doppler radar and magnetometers to test whether geomagnetic disturbance is correlated with the number of birds migrating, their effort flying against the wind, and their flight altitude. Our results suggest that fewer birds migrate during strong geomagnetic disturbances and that migrating birds may experience more difficulty navigating, especially under overcast conditions in autumn. Our results provide ecological context for decades of research on the mechanisms of animal magnetoreception by demonstrating community-wide impacts of space weather on migration dynamics.
Recommended citation: Gulson-Castillo, E. R.; Van Doren, B. M.; Bui, M. X.; Horton, K. G.; Li, J.; Moldwin, M. B.; Shedden, K.; Welling, D. T.; Winger, B. M. (2023) Space weather disrupts nocturnal bird migration. Proceedings of the National Academy of Sciences. 120(42). https://doi.org/10.1073/pnas.2306317120 https://doi.org/10.1073/pnas.2306317120
Observations and Model of Subauroral Sporadic E Layer Irregularities Driven by Turning Shears and Dynamic Instability
Published in Journal of Geophysical Research: Space Physics, 2024
Observations of coherent scatter from patchy sporadic E layers in the subauroral zone made with a 30-MHz coherent scatter radar imager are presented. The quasiperiodic (QP) echoes are similar to what has been observed at middle latitudes but with some differences. The echoes arise from bands of scatterers aligned mainly northwest to southeast and propagating to the southwest. A notable difference from observations at middle latitudes is the appearance of secondary irregularities or braids oriented obliquely to the primary bands and propagating mainly northward along them. We present a spectral simulation of the patchy layers that describes neutral atmospheric dynamics with the incompressible Navier Stokes equations and plasma dynamics with an extended MHD model. The simulation is initialized with turning shears in the form of an Ekman spiral. Ekman-type instability deforms the sporadic E layer through compressible and incompressible motion. The layer ultimately exhibits both the QP bands and the braids, consequences mainly of primary and secondary neutral dynamic instability. Vorticity due to dynamic instability is an important source of structuring in the sporadic E layer.
Recommended citation: Hysell, David; Bui, Michelle; Larsen, Miguel. (2024). "Observations and Model of Subauroral Sporadic E Layer Irregularities Driven by Turning Shears and Dynamic Instability." Journal of Geophysical Research: Space Physics. 129. https://doi.org/10.1029/2024JA033088
talks
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Conference Proceeding talk 3 on Relevant Topic in Your Field
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