User:Robertinventor/Simple animals could live in Martian brines - Extended Interview with planetary scientist Vlada Stamenković: Difference between revisions
User:Robertinventor/Simple animals could live in Martian brines - Extended Interview with planetary scientist Vlada Stamenković (edit)
Revision as of 19:07, 23 September 2019
, 4 years ago→More detailed models
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[[File:Changes in tilt of Mars's axis PIA15095.jpg|thumb|Mars's axis varies in its tilt (obliquity) over timescales of hundreds of thousands to millions of years. It is currently tilted to about 25-degrees, with ice in relatively modest quantities at the poles (top left). Ice builds up near the equator at high obliquities (top right) and the poles grow larger at very low obliquities (bottom). Vlada Stamenković et al's model showed that the current situation is around optimal for oxygenated brines. Their model predicts the potential for oases with enough oxygen for simple sponges at tilts of up to around 45 degrees.]]
'''''(background information):''''' Their model took account of the tilt of the Mars axis, which varies much more than for Earth (our axis is stabilized by the presence of the Moon). They found that for the last five million years conditions were particularly favorable for oxygen rich brines, and that it continues like this for ten million years into the future, as far as they ran the model. For the last twenty million years, as far back as they took their modeling, oases with enough oxygen for sponges are still possible.
:: {{WNIQ}} What was the resolution for MarsWRF
::'''VS''': Both the horizontal and vertical resolution of the model are variable and selectable at run time; we use a 40-layer vertical grid (0–80 km), following a modified-sigma (terrain-following) coordinate. The lowest model layer with this vertical grid is ~75–100 m above ground level, depending on location and season. We use a horizontal resolution of 5° × 5°, which corresponds to a grid of 72 points in longitude × 36 points in latitude.
===Could sponges survive through times when the tilt is higher?===
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