Case Studies

Cards (26)

  • eocene was 55-40 mya
  • eocene had 560 parts per million in the atmosphere
  • eocene was 14C warmer than today
  • eocene has increased oceanic mixing leading to increased meridional current, leading to more heat
  • tides were very energetic during the eocene
  • pacific ocean had thee overturning circulation
  • venus is an example of an extreme greenhouse
  • venus has high levels of CO2 (97%) which traps heat from sun
  • venus has thick clouds that trap heat
  • Goldilocks zone
    distance from a star from which water can exsist as a liquid
  • venus receive twice as much sunlight as we do
  • venus has a surface temperature of 450C
  • venus has a slow rotation, 117 earth days are one venus day
  • venus spins backwards
  • venus is prograde but rotates retrograde
  • venus allowed heat to escape at night
  • venus in its youth could have hosted life
  • venus had a resurfacing event 1 bya causing extreme greenhouse effect
  • Snowball earth was more slushy than frozen
  • easy to freeze earth but hard to unfreeze
  • snowball earth had -110C at poles
  • snowball earth was 715-630 mya
  • snowball earth had oceans
  • you need 120 ppm to melt to snowball earth
  • ice melted with geothermal heat flux from the mid-atlantic ridge
  • sponges are found during snowball earth meaning that the oceans must of been ice free