What is the temperature trend over the holocene (last 10,000 years)?

Question

Is the trend-line rising or falling between 10,000B.C. - 2008A.D.?

Answer 1

The data is not complete and most of the planet was never searched to see what the temperature was or is now. As you know most of Earth's surface is covered with water so there is no evidence of the temperature over time. The thing about climate change is its local and caused by geothermal events that are unknown to science at this time. The internal heat of Earth mostly flows into the ocean and nothing is known about where it goes or how much heat is flowing from the mantle into the ocean.

Answer 2

The temperature's have been below and above our current temperature at least five times over the last 10,000 years. One the younger dryas was a temperature spike of about 5 degrees Fahrenheit over our current temperature and a drop back to ice age temps. This was what was used to develop the concept that the scare movie day after tomorrow was based on. There was also during the little ice age a very sudden spike that went well above our year 2000 temperature and back down to the cold of the little ice age in less than a hundred years from cold to cold again.

The data those who use validated historical theories use is from several sources from all over the world, ice cores from all major glaciers, tree rings, lake and ocean bottom silt cores and historical documents from groups who lived in the region where other material was taken from

Answer 3

It was falling until about 150 years ago.  Then it spiked.  Purely coincidentally, I'm sure.

http://globalwarmingart.com/wiki/Image:H...

Look at the graph yourself.  There most likely haven't been any spikes as large as the current one in the past 10,000 years.  If there were, it would be due to things like a spike in solar output, which we're not currently experiencing.

We know there have been rapid climate changes in the past due to natural causes.  It's not a question of whether natural causes *could* cause the current warming, it's a question of whether they *are*.

The point is that these causes have been ruled out as causing the current warming.

*edit* No, as I've said many times before, the warming over the past 30 years is approximately 80-90% anthropogenic.  The other ~10% is 'natural'.

http://www.globalwarmingart.com/wiki/Ima...

http://www.sciencedaily.com/articles/a/a...

"all anthropogenic forcings (everything except solar, volcanic effects have very small trends) are ~80% of the forcings (and are strongly positive)."

http://www.realclimate.org/index.php/arc...

Answer 4

Good question, fairly stated.  Starred.

The trend line was falling slightly, before we messed things up with manmade greenhouse gases.

http://www.globalwarmingart.com/wiki/Ima...

Note that there are no "spikes" except for the one we caused, at the far right hand edge of the graph.  There have been no abrupt changes in the last 10,000 years, until this one.