How confident are you in the accuracy of climate models?

Posted in Green Q&A | 19 comments

Do you think they’re generally accurate? Worthless? On what do you base this conclusion?

Here is one scientist’s take:

Many of the comments to previous blogs have stated that models are “just” a set of assumptions, and that the processes in the Earth’s climate are so complex that they defy our attempts to model them with any rigor. There are assumptions that are made when models are built, but those assumptions are not simply pulled out of a bag of magic tricks. In fact, arbitrary, unjustified assumptions are generally repelled from the modeling community because, first and foremost, the models need to describe some set of observations and the evolution of those observations, i.e. prediction. Most components of models are, just like my original modeling efforts, a representation of mathematical equations that rigorously describe the motion of the atmosphere. The idea that I and my colleagues would work from some potpourri of unjustified assumptions is, in fact, a bit offensive.

http://www.wunderground.com/blog/RickyRood/comment.html?entrynum=57&tstamp=200801

Jello, welcome to our side.

http://en.wikipedia.org/wiki/Image:Climate_Change_Attribution.png

Read More

What is the conservation status of the spotted owl?

Posted in Green Q&A | 2 comments

What’s the conservation status of the spotted owl and the northern spotted owl? Source other than Wikipedia please.

Read More

How much of global warming is human civilization responsible for?

Posted in Green Q&A | 10 comments

The last Ice age end 18,000 years ago at which point global warming began. This is before human civilization. So man didn’t start global warming but is contributing to the situation. I find that the warming rate is still a point of discussion but the total is around 2 degrees F every ten years. What part of the 2 deg F is caused by human civilization?
Leon – You need to do some reading and get the facts. The ice started melting before man built a city.
Larry B – "Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100." http://en.wikipedia.org/wiki/Global_warming
So we are talking about .2 – 1.1 deg F over 10 years from your source, but I have seen some at 2.5 deg F per 10 years.
Jeff P – What part of you speech is the answer to the question?
Hypofocus – I’m asking a question in order to make informed decisions. I’m not one of the sheep just getting in line!
Bob – Thanks for the graph, it paints a good picture.

Read More

How much of global warming is human civilization responsible for?

Posted in Green Q&A | 10 comments

The last Ice age end 18,000 years ago at which point global warming began. This is before human civilization. So man didn’t start global warming but is contributing to the situation. I find that the warming rate is still a point of discussion but the total is around 2 degrees F every ten years. What part of the 2 deg F is caused by human civilization?
Leon – You need to do some reading and get the facts. The ice started melting before man built a city.
Larry B – "Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100." http://en.wikipedia.org/wiki/Global_warming
So we are talking about .2 – 1.1 deg F over 10 years from your source, but I have seen some at 2.5 deg F per 10 years.
Jeff P – What part of you speech is the answer to the question?
Hypofocus – I’m asking a question in order to make informed decisions. I’m not one of the sheep just getting in line!
Bob – Thanks for the graph, it paints a good picture.

Read More

What would it take to convert a housing community from fossil fuels to solar energy in the home?

Posted in Green Q&A | 2 comments

Serious discussion here.

How feasible is the idea of communities, towns, even whole cities being powered by solar energy? At the most, how about these communities being fractionally powered by solar energy; 40% Solar/ 60% Fossil fuels?

We’re not getting all George Jetson, here. We have practical means by which to make something like this happen. My research has lead me to believe the problem comes in with the initial setup.

If this is so, what would it take to materialize the dollars? Should each State solicit a ‘solar energy’ tax; money dedicated to fund R&D solutions for citizens? Is it something that can be solicited to big business in exchange for free plugins; Staples invests in a solar power grid in Downtown Los Angeles… and calls it ‘The Staples Power Center".

Wikipedia:

http://en.wikipedia.org/wiki/Solar_power

http://en.wikipedia.org/wiki/Solar_power#Advantages_and_disadvantages_of_Solar_power

http://en.wikipedia.org/wiki/Solar_ponds

Read More