[IGPP Everyone] TODAY: Space Physics Seminar - Fri May 19th, 2023, 3:30PM - Energetic electron precipitation: Magnetospheric drivers and atmospheric impacts (L. Blum, LASP CU)

[Emmanuel Masongsong]

SPACE PHYSICS SEMINAR 



DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES 

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES 
UNIVERSITY OF CALIFORNIA, LOS ANGELES 



Friday , May 19th, 2023 

3:30 - 4:30 PM 



In-person in Slichter Hall # 3853, with refreshments and snacks afterwards on Franz Patio. 

Additional snacks will include cookies and mochi ice cream , come and get your grub on! 


Energetic electron precipitation: Magnetospheric drivers and atmospheric impacts 


presented by 

Dr. Lauren Blum 

CU/LASP 




The outer radiation belt is a highly dynamic region of the Earth’s magnetosphere, with often-unpredictable variations in intensity and spatial extent. Characterization of this variable radiation environment is critical to mitigating spacecraft anomalies often caused by energetic particles. Precipitation into the atmosphere has been shown to be an important loss process for energetic particles in Earth’s magnetosphere, as well as a key energy input to Earth’s atmosphere, modifying atmospheric chemistry and ozone content. Here we explore the nature and extent of electron loss to the atmosphere as well as what electromagnetic wave modes may be causing it. In particular, we examine the detailed properties of rapid sub-second precipitation, termed microbursts. Microburst precipitation has long been associated with whistler mode chorus wave activity, due to their similar global distributions and sub-second structure. However, despite decades of observations, large gaps remain in our understanding of how, where, and when chorus waves can produce relativistic electron microbursts. We’ll highlight some recent results providing a more complete picture of the complex relationship between chorus waves and microburst precipitation. Finally, we’ll end by highlighting some upcoming efforts, including balloon and CubeSat measurements currently under development, that will help reveal the nature of the interaction between precipitating energetic particles and Earth’s atmosphere. 





ZOOM LINK: 

https://ucla.zoom.us/j/98070654630?pwd=aWdrSktueG9xWjU3cDZiQUhGRXV0UT09 

Meeting ID: 980 7065 4630 
Passcode: 365356 



In-Charge: Vassilis Angelopoulos, EPSS & Jacob Bortnik, AOS 

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