Old Rocks
Diamond Member
You say we are overdue for a warming cycle? Just what do you base that on? Because the cycles that we see are the Milankovic Cycles, and they say we should slowly be entering a cooling period. And that is what we see when we look at the temperatures for the past 1000 to 2000 years.Of course they have. But at a much slower rate in most cases. However, when they came on very quickly, or it cooled very quickly, those were times of extinction. And your graph is far to large scale to show many of the excursions of GHGs. The one for the Ordovician went far deeper than your graph indicates. Much work has been done recently on proxy data that shows this.
It is not the absolute temperature that is the problem at present. But the rate that the temperature is changing, and the effects that will have on the agriculture and ocean life that over 7 billion humans depend on for food. Also, as the sea level rises, there will be millions of displaced persons, and many of them with no place to go because of borders with hostile nations. A situation that will result in some bad conflicts, some of them involving nations with nuclear arms.
yet according to those graphs, we are due (if not overdue) for a warming period and really nobody can tell if the current so called warming isn't from natural causes or human.
the effects that will have on the agriculture and ocean life that over 7 billion humans depend on for food. Also, as the sea level rises, there will be millions of displaced persons, and many of them with no place to go because of borders with hostile nations. A situation that will result in some bad conflicts, some of them involving nations with nuclear arms
^^^^this is the whole premise of the current 'Global Warming' scare. That as the earth goes thru it's normal warm up cycle, glaciers will melt, raise the sea levels, etc......the only difference between now and say 350 million years ago, is the displaced populations because of it.
Milankovitch Cycles — OSS Foundation
NATURAL CYCLE DEPARTURE
The natural cycle is range bound and well understood, largely constrained by the Milankovitch cycles. Since the beginning of the industrial age, humankind has caused such a dramatic departure from the natural cycle, that it is hard to imagine anyone thinking that we are still in the natural cycle.
Natural vs. Modern Forcing
Natural vs. Modern Climate Path
This departure is so dramatic that it has instigated a new era. According to some studies, there is enough evidence to state that we have departed the Holocene and entered the Anthropocene. Simply put, based on the evidence, mankind has forced the Earth climate system to depart from it's natural cycle forcing.