BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Earth and Planetary Sciences Seminar: Dr. Dan Shim - Building 
 a Wet Planet from Dry Materials
X-WR-TIMEZONE:Pacific Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260722T143128Z
UID:tag:localist.com\,2008:EventInstance_41872079378341
DTSTART:20230124T200000Z
DTEND:20230124T210000Z
DESCRIPTION:It has been believed that water-rich planets are formed outside
  the snow line.  However\, discovery of many close-in orbiting sub-Neptune
 s\, if at least some of them are waterworlds\, challenges the notion.  The
 refore\, many sub-Neptunes have been believed to be instead large Earth-li
 ke planets with thick hydrogen rich atmosphere. We have conducted a series
  of experiments under the pressure-temperature conditions expected at the 
 boundary between hydrogen-rich atmosphere and rocky interior of a sub-Nept
 une.  We found a reaction between hydrogen and magma which can unlock oxyg
 en from silicate magma and enable oxygen to react with hydrogen to form wa
 ter. The chemical reaction can convert a dry hydrogen-rich planet to a wat
 er-rich planet even inside the snow line.  I will also discuss how such re
 action can impact the atmosphere and the potential habitability of super-E
 arth exoplanets\, many of which may be converted from sub-Neptunes.\n\nDan
  Shim is a Navrotsky professor of materials research at the School of Eart
 h and Space Exploration at Arizona State University. His research interest
 s include the physical and chemical properties of materials at high pressu
 res and temperatures and their implications for the structure and the evol
 ution of Earth and planetary interiors. He earned his Ph.D. in geosciences
  from Princeton University. He was a Miller Research Postdoctoral Fellow a
 t the University of California Berkeley. He worked at MIT as an assistant 
 and associate professor until 2012\, when he joined Arizona State Universi
 ty. \n\nFor the zoom information\, please get in touch with Rey Garduño (
 rgarduno@stanford.edu)
GEO:37.427405;-122.1697
LOCATION:Building 320\, Geology Corner\, 220 and Zoom
SUMMARY:Earth and Planetary Sciences Seminar: Dr. Dan Shim - Building a Wet
  Planet from Dry Materials
URL;VALUE=URI:https://events.stanford.edu/event/geological_sciences_seminar
 _dr_dan_shim
CATEGORIES:Class/Seminar
END:VEVENT
END:VCALENDAR