Global Warming Theorists Q#2: Why Was The Earth Hotter Six Thousand Years Ago?

Question

During the "Holocene Thermal Maximum" time period?

Most "CO2 global warming" believers don't know that the earth was hotter thousands of years ago. All they do know is there were no SUVs back then.

Also, there was a spike in temperature around 15,000 years ago. (15,000 years is nothing compared to the age of the earth). That spike 15,000 years ago was actually a faster increase in temperatures than what we have today. And again, there were no SUV's back then.

It took less than 20 years for temperatures to jump at that point. That rapid temperature increase resulted in the earth leaving the ice age (which had lasted thousands of years).
http://www.geocraft.com/WVFossils/PageMill_Images/image160.gif

NASA: "Rapid changes between ice ages and warm periods (called interglacials) are recorded in the Greenland ice sheet. Occurring over ONE OR TWO DECADES, the warming of the Earth at the end of the last ice age happened much faster than the rate of change of the Earth’s orbit."

Answer 1

It wasn't.

The holocene maximum of 6000 years ago was cooler than the current average temperature.
http://en.wikipedia.org/wiki/Holocene_Climatic_Optimum.

The holocene maximum was caused by orbital forcing, which are small changes in earth's orbit. Since the earth's orbit can be computed for thousands of years into the past and the future, we also know that since the holocene maximum, orbital forcing should be slowly cooling the planet right now.
http://www.sciencemag.org/cgi/content/abstract/207/4434/943.

The spike in temperature that your graph shows (and by the way: what is the source of data for this graph?) is 2.3° in 575 years, an increase of .004° per year. The current temperature spike is 0.7° in 100 years, an increase of .007° per year -- nearly TWICE the rate of increase as the natural spike. And where did you get the less than 20 years number? It's certainly not on the graph you showed.

The quote from NASA shows only that local changes are faster than global ones -- something climate scientists have always known.

Answer 2

hi there!.... it was rewarming after the ice age about 640,000 years ago, thank you Yellowstone Caldera.....

For those of you new to the area of geology, the earth is subject to many motivators when considering the climate. Only one is man..... the big one and I mean really BIG one is what the earth does to itself....volcanos are responsible for much of the global cooling and when the action from the volcanos subsides it gets hot again.

Yellowstone is a huge "volcano", though not in the traditional way. It is called a "hot spot" which is an area of crust "floating" over a lake of molten rock... how big is this lake?
Current readings have it as 52x37 give or take a little.... by the way that is 52x37 miles across ........
When (not if, but when) it explodes again, ground zero will be from Salt Lake City to Calgery to Denver. The pyroclastic cloud will take out everything in this area and places like Bozeman Montana can count on being hit 7 seconds after the explosion. New York city will see a layer of ash 8 inches deep and even England will see 3 inches. A virtual nuclear winter will over take the planet..... for several thousand years.

When was the last time..... about 640,000 years ago... what is it's rate? well in the last three times the rate has been about every 650,000-700,000 years... guess we're about due.
Oh by the way..... I'll have to look for it but I know I read today that South Africa was having one of the coldest winters on record....I guess they didn't get the global warming memo....

Answer 3

Most 'Global Warming believers' do know that the Earth was hotter then. There was a medieval warm period, too, only about 1000-600 years ago. When you could happily grow grapes in England. A short time afterwards, it was common in winter for people to ice skate on the Thames in London during the Little Ice Age. Yes, climate change is natural. It happens without us.

Have you considered the fact that yes, we are in a natural period of warming, but yes, it is FACT that we are accelerating it.

Look at the graph here, please:

http://upload.wikimedia.org/wikipedia/en/c/c1/2000_Year_Temperature_Comparison.png

Scientists are FULLY aware of the changes in temperatures from a long time ago to present. Before humans recorded it, it can be worked out through ice sheets and in tree records. Always, a heating of the Earth has been due to increased levels of certain gases in the atmosphere. Mainly carbon dioxide. You can't dispute the fact we're putting Carbon dioxide into the atmosphere? Whether the increases in these gases in the atmosphere is natural (through carbon sinks, through volcanoes), or man-made (you know the score), it'll affect climate.

What that graph shows, is that, yes we're in a natural warming period. But that period should have PEAKED by now. And it hasn't. It's still rising. In fact, you can see exactly when the rise in temperature accelerated.

Guess when that was? The industrial revolution.

Answer 4

First of all, this assumption that anyone who believes in global warming caused by humans does not know history is simply false!!

The difference between natural global warming and human global warming is that humans are dramatically changing the ecosphere of the globe in a very short time. Whereas quick natural global warming happens when something dramatic happens on the Earth. Most quick changes in temperature on the Earth are believed to have been caused by large meteors hitting the planet or some other scientific explanation, but no scientist that I have ever heard of suggested that quick climate temperatures just happen on their own.

Take care,
Troy

Answer 5

The earth is going via cycles those cycles are in many situations predicated on photograph voltaic interest and organic situations that adjust the quantity of CO2 interior the ambience, at that factor it is probable the planet became dealing with a warm cycle. the subject with climate replace is that we've presented a variation to usual situations, with our burning of fossil fuels we've extra desirable than doubled the quantity of CO2 interior the ambience at any given time by way of fact measurements have been made for. this does not heat up in one day, the planet is an extremely very massive place, it takes a great sort of potential to heat up and a great sort of time. The CO2 we've positioned into the ambience is warming the planet previous what could be usual. no one ever reported that there are no cycles, yet that the cycles are transforming into warmer and warmer and this time it is going to likely be way warmer than it has ever been by way of our strikes. right here is an analogy that could grant help to know the thought. You gets a commission $a million,000 a week and you spend $ a million,000 a week each and every now after which you spend a sprint extra yet then you shrink your expenditures usual it extremely is an identical ingredient. yet while somebody comes to a decision to place into your checking account $5,000 extra a week and you saved on spending the $a million,000 even however you wont be a millionaire day after today in time it is going to upload as much as a million dollars. a similar ingredient is occurring with the quantity of CO2 we are pumping, in time it is going to upload as much as actual funds (trouble).

Answer 6

Because 'global warming' is a misnomer, your question is valid.

It should be called 'artificial climate change' or something similar to that. In that case, it would be easier to understand.

We're not experiencing a climate change such as the ones you mention. It is the scientists who analyze these phenomenon full time who are saying that we were gradually descending into a solid freeze which has been interrupted by a human-induced reversal.

The earth doesn't care; the chief losers are large mammals and the plants they use, so it's humankind that is in trouble, not the earth.

I hope this helps.

Answer 7

Fred Flinstone drove a Ford Excursion

Answer 8

Temperature fluctuations in the ancient past could have been caused by any number of factors including solar output and global positioning in relation to the sun.

Answer 9

I don't think you need to go that far back. There was a period from the tenth century to the 14th century known as the medieval warm period. It was a period of 400 years of warm climate that has yet to be explained.

Answer 10

I think that they are cycles that occur randomly, maybe. I think that global warming is a problem, but if a cycle like this happens again, global warming may play a factor in this.