Sentences with phrase «snowball earth where»

And it has survived near total extinction events where only subterranean bacteria persisted, snowball earth where no ground was left exposed, only thick icesheets.

Not exact matches

This chemical weathering process is too slow to damp out shorter - term fluctuations, and there are some complexities — glaciation can enhance the mechanical erosion that provides surface area for chemical weathering (some of which may be realized after a time delay — ie when the subsequent warming occurs — dramatically snow in a Snowball Earth scenario, where the frigid conditions essentially shut down all chemical weathering, allowing CO2 to build up to the point where it thaws the equatorial region, at which point runaway albedo feedback drives the Earth into a carbonic acid sauna, which ends via rapid carbonate rock formation), while lower sea level may increase the oxidation of organic C in sediments but also provide more land surface for erosion... etc..

So if the oceans cant absorb IR to get their heat and if they cant absorb heat from the air (which is actually a good thing otherwise it would be snowball earth time) then where oh where did all the heat go?

We could, of course, hit some bifurcation in the system where we lose all the summer Arctic sea ice or the Amazon forest, which is bad enough, and could possibly transition the climate to a different «solution» on a hysteresis diagram... this to me would represent more of a step-wise jump (akin to a larger bifurcation that you get in a snowball Earth as you gradually reduce CO2 or the solar constant); but ultimately these represent different behavior than «the interannual variability of the large scale dynamics will increase» or that for some reason the climate should be susceptible to more «flip flops» (as in the glacial Heinrich / D - O events), of which I am aware of no observational or theoretical support.

The earth has been in a snowball state several times where the tropics were at least slush if not frozen.

Rather what they should be doing is setting up dummy models to help them test hypotheses and get to where these models could replicate the snowball earth and the heat maximum.

For a relatively circular orbit, the problem of determining where Earth falls into and out of a Snowball is challenging.