'5 ways to save the world' BBC2 (last night)

[DimPrawn]

Yes. They had really inaccurate thermometers made of stone and bronze.

HTH

[sasguru]

Look, name calling, posturing and waving of "this definitive scientific paper" around, has anyone explained the medieval and Roman-era warm periods? Clearly they were not caused by CO2 emissions from cars and planes.

This is from a US Department of Commerce website. You'd think they'd be as sceptic (pun intended) as anyone:

http://www.ncdc.noaa.gov/paleo/globa.../holocene.html
http://www.ncdc.noaa.gov/paleo/globa.../medieval.html

[Dalek Supreme]

Interesting read here, explaining that the sudden and rapid increase in temperature in the last 50 years is not as sudden or rapid as you might think, compared to previous sudden and rapid increases in temperature. Includes the famous graph omitted from the UN reports because it made the recent changes look like nothing remarkable.

Climate chaos? Don't believe it

[Paddy]

Has anyone explained the medieval and Roman-era warm periods?

Please?

The warming period during Roman times was caused by the excessive chariot horses making methane and the carbon emissions from the central heating systems in Roman Villas. Once the Romans left, the country cooled down again.

[shoes]

As a slight aside, I think something that is particularly worrying about this debate and others is how little 'the people' trust their government. This mistrust is clearly with good reason, but it is also potentially very damaging. There are many people now who will not believe a single word an authority figure tells them regardless of how correct or sensible it may be. What if there really is a problem that we all need to address for the sake of our own survival? We are in danger of not surviving because we simply won't believe them when they tell us. Think the little boy that cried wolf, except replace wolf with T-Rex who is going to eat the village. In conclusion, Tony Blair is responsible for us all being eaten by dinosaurs.

[sasguru]

[QUOTE=The Lone Gunman]

Where do you get the idea I am ill informed or what I am saying is garbage?
Your argument is based on a report produced by a number of people whose interests will be best served if they show a link.

Show me that you understand the science that says you are wrong and I may accept your point. Untill then you will find that it is you who is the ill informed idiot around here.

Now tell me again how we account for the rapid changes in temperature and climate before human activity was a factor.
Untill your science can prove that the same issues are not re-occuring then your science can not be trusted.
Much of the science I have read shows why the previous changes occured.

As I have said. I do believe that human activity is a factor.
I choose not to blindly follow your path.

Gte your head out of your arse and read the rest of the science. It is you that is the Chico here pushing your truth taken from your bible at us.

I refer you to my one of my posts above.

[Burdock]

Shoes, that is an excellent point!!

Also, I am baffled how people still say they completely disbelieve any link between humans and global warming.

Only a couple of weeks ago the IPCC (Intergovernmental Panel on Climate Change) concluded:

"It is very likely that human activities are causing global warming".
http://news.bbc.co.uk/1/hi/sci/tech/6324029.stm

This is a body of peer-reviewed scientists from around the world.

Global warming caused by humans deniers are defending the indefensible!

[Dalek Supreme]

Has anyone explained the medieval and Roman-era warm periods?

Increasingly, the answer appears to be "no"

[Paddy]

How to Look at ‘Global Warming’

How to Look at ‘Global Warming’
A very important thing to understand in interpreting all the swill that issues daily from the Global Warming mill (really the anti-industry, anti-population lobby, headed and pumped with money by the Royal Consort Prince Philip, and former Nazi Party member Prince Bernhard of the Netherlands), is that the onset of an Ice Age is not marked by global cooling. In fact, the very same astronomical conditions which cause a cooling at high latitudes in the Northern Hemisphere, produce the opposite effect in the Southern Hemisphere, where there is much more ocean to absorb and retain the incoming solar radiation. Thus the global average temperature does not tell us anything of importance.

The geological requirements for an Ice Age are the presence of a large landmass around the Polar Circle and extending southward. A look at the globe, or world map, shows that those conditions exist in the Northern Hemisphere, but not in the Southern. Therefore, the important thing to look at is the climate conditions in northern and far northern regions. Some of the indicators:

• Since 1980, there has been an advance of more than 55% of the 625 mountain glaciers under observation by the World Glacier Monitoring group in Zurich. (From 1926 to 1960, some 70-95% of these glaciers were in retreat.)

• A comparison of the U.S. Department of Agriculture’s 1965 and 1990 Plant Hardiness Zone Maps, shows a southward change of one zone, or 10°F, between 1965 and 1990.

• Careful measurements of the oxygen isotope ratios in German oaks, which are rigorously calibrated to temperature data, show a 1°C temperature decline from 1350 to 1800 (the lowpoint of the Little Ice Age). Temperature thereafter increased by 1°C from 1800 to 1930, and has been declining since then.

• From weather stations in the Alps, and in the Nordic countries, we find the temperature decline since 1930 is also 1°C.

• Satellite measurements have shown growth in the height and breadth of the huge Greenland ice sheet, the largest in the Northern Hemisphere

[gingerjedi]

Has anyone explained the medieval and Roman-era warm periods?

Please?

Comment from RealClimate.org


I was interested in the comment about English wine being about at the time of the romans (What have they ever done for us? Well there's the wine!).

Translations of tablets at vindolanda up near hadrian's wall (admittedly nearly in scotland and therefore practically arctic) make it clear that the local commander got his wine imported from gaul, so that may be a comment on the quality of the local produce.


So there you go the wine was tulip which suggests the warm periods didn't exist.