Sun, Not Man, Main Cause of Climate Change?

You are 100% right. The Mid Evil Warming period was considerably hotter that things are right now.

The whole problem with the current debait about Global Warming, CO2, greenhouse gasses, is that too many people are confusing two separate issues.

The first issue is are we currently responsible for the increase in air pollution. Yes.

Does this pollution lead to dramatic increases in CO2. The answer is negligable to no.

The worst offending greenhouse gas is water vapour and it is up, way up.

Temperatures have increased on every planet to exactly relative to the earths. All this is much better explained in the documentary the Great Global Warming Swindle.

Check it out in it's entirety at google video.

It's just very important to remember air pollution / global warming / CO2 are all different topics to be evaluated on their own.

It is just as likely that the sun is primarly responsible for global warming as the other theory of trace gasses trapping heat in the middle troposphere, even though the captured heat in the troposphere has never been demostrated in any dataset.

The sun has increased it's output level over the last three decades, however we are currently between solar cycles.

http://www.nasa.gov/centers/goddard/images/content...

The important thing that people need to understand is that there is no clear understanding of all of the interactions involved in Earths climate system. The solar magnetic field has increased substaintly over the last century and the GCR theory does have data that supports an amplification mechanism of TSI by changes in Earths albedo.

Notice how Earths reflectivity has continued to let more sunlight in until around 1997. A 2% change in Earths reflectivity is more powerfull at controlling climate than all the CO2 that has been released over the last 200 years.

http://wattsupwiththat.wordpress.com/2007/10/17/ea...

This explains the new theory of Cosmoclimatology.

http://www.mrcpl.lib.oh.us/pdf/HenrikSvensmark-Cos...

The sun has started a new cycle that began in 1996, and interestingly enough shows up on the Earth Albedo graph. Temperatures are expected to cool considerably over the next 30 years. Even though the cycle started in 1996, the flywheel mechanism of Earths oceans releasing stored solar energy into the climate is somewhat of a mystery as to how long that time period can be.

http://www.financialpost.com/story.html?id=bfeddc8...

Another paper explaining the possibility that the unimaginably large ball of fusing hydrogen we call the sun, just might control climate, more than trace gases in the atmosphere.

http://bourabai.georisk.kz/landscheidt/new-e.htm

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No. Scientists measure the Sun routinely, and solar radiation has been decreasing a bit for some time.

"Recent oppositely directed trends in solar

climate forcings and the global mean surface

air temperature", Lockwood and Frolich (2007), Proc. R. Soc. A

doi:10.1098/rspa.2007.1880

http://www.pubs.royalsoc.ac.uk/media/proceedings_a...

News article at:

http://news.bbc.co.uk/1/hi/uk/6290228.stm

Just because natural changes occurred in the past (mostly by the Sun) doesn't mean this change is natural. Scientists have proven this one is mostly caused by us.

Even the TV channel that broadcast it now says the swindle video was wrong:

http://www.channel4.com/science/microsites/G/great...

Good websites for more info:

http://profend.com/global-warming/

http://www.ucsusa.org/global_warming/science/

http://www.realclimate.org/

"climate science from climate scientists"

http://environment.newscientist.com/channel/earth/...

There are natural cycles of solar activity. But that's not what is causing the current warmth.

1. If the Sun is causing the current warmth, then we're getting more energy, and the whole atmosphere should be getting warmer. If it's greenhouse, then we're getting the same amount of energy, but it's being distributed differently: more heat is trapped at the surface, and less heat is escaping to the stratosphere. So if it's the Sun, the stratosphere should be warming, but if it's greenhouse, the stratosphere should be cooling.

In fact, the stratosphere has been on a long-term cooling trend ever since we've been keeping radiosonde balloon records in the 1950's. Here's the data:

http://hadobs.metoffice.com/hadat/images/update_im...

http://hadobs.metoffice.com/hadat/hadat2/hadat2_mo...

http://cdiac.ornl.gov/trends/temp/sterin/sterin.ht...

2. If it's the Sun, we're getting more energy during the day, and daytime temperatures should be rising fastest. But if it's greenhouse, we're losing less heat at night, and nighttime temperatures should be rising fastest. So if it's the sun, the difference between day and night temperatures should be increasing, but if it's greenhouse, the day-night difference should be decreasing.

In fact, the daily temperature range has been decreasing throughout the 20th century. Here's the science:

http://ams.allenpress.com/perlserv/?request=get-ab...

http://ams.allenpress.com/perlserv/?request=get-ab...

http://www.bom.gov.au/bmrc/clfor/cfstaff/jma/2004G...

3. Total solar irradiance has been measured by satellite since 1978, and during that time it has shown the normal 11-year cycle, but no long-term trend. Here's the data:

http://www.ngdc.noaa.gov/stp/SOLAR/solarda3.html

4. Scientists have looked closely at the solar hypothesis and have strongly refuted it. Here's the peer-reviewed science:

http://www.pubs.royalsoc.ac.uk/media/proceedings_a...

http://www.mpa-garching.mpg.de/mpa/publications/pr...

5. CO2 levels in the air were stable for 10,000 years prior to the industrial revolution, at about 280 parts per million by volume (ppmv). Since 1800, CO2 levels have risen 38%, to 384 ppmv, with no end in sight. Here's the modern data...

http://www.esrl.noaa.gov/gmd/ccgg/trends/

... and the ice core data ...

http://www.ncdc.noaa.gov/paleo/icecore/antarctica/...

http://www.ncdc.noaa.gov/paleo/icecore/antarctica/...

http://www.ncdc.noaa.gov/paleo/icecore/antarctica/...

... and a graph showing how it fits together:

http://www.columbusnavigation.com/co2.html

6. We know that the excess CO2 in the air is caused by burning of fossil fuels, for two reasons. First, because the sharp rise in atmospheric CO2 started exactly when humans began burning coal in large quantities (see the graph linked above); and second, because when we do isotopic analysis of the CO2 we find increasing amounts of "old" carbon combined with "young" oxygen. Here are the peer-reviewed papers:

http://adsabs.harvard.edu/abs/1984JGR....8911731S

http://www.ingentaconnect.com/content/mksg/teb/199...

http://www.sciencemag.org/cgi/content/abstract/256...

So what's left to prove?

There are many factors that cause it. Changes in the suns output is probably number 1

There has always been an increase in solar activity during any warming period. Recent solar activity is at an 11,000 year high. It's definitely a natural cycle.

Yes the Sun is our primary source of heat - but it also emits -

Solar Winds, Solar Flairs, X-Ray Flairs, Strong Magnet emissions, etc

You can monitor most of the other emissions here:

http://spaceweather.com/

Then most people seem to overlook our second source of heat:

http://volcano.und.edu/vwdocs/vwlessons/lessons/Ea...

Check out the tremendous heat just a few miles beneath us!

The combined land and ocean temperatures are most critical.

If the oceans are heated up - they will NOT reabsorb CO2.

The oceans are the earth's primary reservoir of CO2.

Most important of all - Oceans Drive Global Climate.

Carbon Emissions Don’t Cause Global Warming

http://icecap.us/images/uploads/Evans-CO2DoesNotCa...

Archeology is science. We really should study it and see what has happened in the past. Global warming and cooling is normal and natural and will not be influenced by the pitiful efforts of humans.

Yes, there have. However, the Sun's output has decreased slightly over the past 30 years as global warming has accelerated.

http://news.bbc.co.uk/2/hi/uk_news/6290228.stm

http://answers.yahoo.com/question/index;_ylt=ArWwA...

And we're in a cooling period of the Earth's orbital cycles.

http://en.wikipedia.org/wiki/Milankovitch_cycles#T...

Climate scientists have considered all these factors. The scientific facts clearly show that the current global warming is being caused by increased greenhouse gases in the atmosphere, caused by humans burning fossil fuels.

http://answers.yahoo.com/question/index;_ylt=AgCxB...

The suns' effects are only one, even if the main one. We CAN reduce OUR effects and make some difference. Does that not matter to you?