Impact of Space Weather on the Lunar Electrodynamic Environment.

Details Impact of Space Weather on the Lunar Electrodynamic Environment. Impact of Space Weather on the Lunar Electrodynamic Environment.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm52a..07v&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM52A-07

Astronomy and Astrophysics

Astronomy

2780 Solar Wind Interactions With Unmagnetized Bodies, 5421 Interactions With Particles And Fields, 5465 Rings And Dust, 6250 Moon (1221), 7924 Forecasting (2722)

Scientific paper

It is well known that space weather events, such as coronal mass ejections (CMEs), will present a significant radiation hazard to astronauts on the surface of the Moon; however, the impact of the coincident disturbance to the Moon's electrodynamic environment is much less well understood. Observations from the Apollo era revealed that typically the dayside of the Moon was electrically charged to a few volts positive due to the photoemissions of electrons from the surface; while the terminator region and nightside were charged in excess of 100 volts negative by electrons from the solar wind. There is evidence that the electric fields created by these charging processes drive the transport of electrically-charged lunar dust at the surface up to altitudes of ~100 km. During intervals of extreme space weather it is possible that enhanced surface electric fields and dust transport could also pose an increased hazard to astronauts on the Moon's surface. In this study we predict the surface electric fields at various locations on the Moon's surface during the passage of a CME and discuss the anticipated effects on dust transport, and the implications for scientific and exploration activities.

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