CEDAR email: 11th SCOSTEP/PRESTO Online Seminar by Dr. Cora Randall

[Nick Pedatella]

Dear Colleagues,

We are pleased to announce the 11th SCOSTEP/PRESTO online seminar will be
given by Dr. Cora Randall (University of Colorado) on February 10, 2022 at
14:00-15:00 UT. Information regarding the seminar is below.

Seminar Title: Solar-Terrestrial Coupling via Energetic Particle
Precipitation

Date/time: February 10, 2022 14:00-15:00 UT

Zoom registration:
https://us02web.zoom.us/webinar/register/WN_l2flp8tBTIaONoSaJS8eLA

Abstract:
A long-standing goal in the Aeronomy community is to identify and explain
the atmospheric
processes that indirectly amplify the effects of solar and magnetospheric
input. These processes initiate nonlinear feedbacks that couple all regions
of the atmosphere, impacting weather and climate throughout. This seminar
will focus on how energetic particle precipitation (EPP) influences the
middle atmosphere, and how coupling processes amplify these impacts. EPP
refers to energetic electrons and protons impinging on the earth’s
atmosphere after they have been accelerated by solar and magnetospheric
activity. Through complex reaction pathways the precipitating particles
produce reactive odd nitrogen (EPP-NO x = N+NO+NO 2 ) and odd hydrogen
(EPP-HO x = H+OH+HO 2 ), both of which are important for the catalytic
chemistry of ozone. EPP-induced changes in the geographic distribution of
ozone, a radiatively important gas, can in theory induce temperature
gradients that might impact winds, wave filtering, and the general
circulation. This presentation will provide a historical perspective on
investigations of EPP impacts on the middle atmosphere, summarize the
current understanding, and highlight major areas of uncertainty and needs
for the future.

Nick Pedatella
(On behalf of the PRESTO & SCOSTEP leadership)
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