Global dimming and warming.

[popeyespappy]

So your argument is conditions leading into the Great Dying were different than today therefore the result can’t be the same? If so then I too call bullshit. To begin with it is generally recognized already that we are now in the midst of the 6th great extinction. Estimates at the low end are that we are losing species at a rate 1000 times the normal background rate during the Holocene extinction. The current loses are mostly attributed to climate change and human activity resulting in habitat loss.

Yes it is thought that CO2 concentrations were many times higher than they are now. Never the less what killed all those species then is the same thing that is killing them now. Environmental stress. Estimates are that the temperature changed 8 degrees C during the Permian extinction. It took 100,000 years. We have changed the temperature a tenth of that amount in the last 50 years alone. Current living species are being exposed to the same type of environmental stress they were then.

Rain forests contain a large portion of Earth’s biodiversity. The current data is telling us AGW is probably going to cost us the rain forests in the geologically speaking very near future because those areas are going to become much drier. Those changes are happening so fast that most of the species living there are not going to be able to adapt to those changes, and most of those species are going to go extinct.

The indications are that the environmental stress current species are experiencing during the Holocene extinction are the same kind of stresses than those experienced during the Permian extinction. While the conditions may be a bit different now than they were then much is the same. We are currently seeing increased CO2 levels, temperatures and aridity where it hurts the worst. These things aren’t as bad now as they were then, but they appear to be happening faster this time around. Even though conditions are different the end result could be the same. Maybe it won’t be as bad this time. Maybe it will be worse. Maybe we lose 90% of land species and 70% of aquatic species instead of vice versa. It is impossible to predict at this point. Unfortunately are just as impossible to rule out at this point.

Mass exodus to water? What happened, did all of the pumps in the world miraculously stop working the day after tommorrow? Are we going to wake up that morning and draw a blank on the last few thousand years of civil engineering?

Are you not paying attention at all?

Aquifer Depletion