Topic: White roofs

White roofs 

Does painting your roof white help reduce global warming?

Re: White roofs 

After a quick check for this topic on google it would appear the answer is NO! but it might generate some discussion!!

Re: White roofs 

ive often wondered what is best.a white roofs coating will last a lot longer because it dosnt get as hot. but a black roof will dry out much quicker and the condensation that forms most nights will dry quickly each morning too. youd be amazed at the amount of water that flows down the underside of your tin roof each day.

Re: White roofs 

Hello Nikoftime,

OK, I will bite and enter your suggested discussion.

Since the 1998 peak temperature recordings, we have had a neutral changing to slight decline in the global temperature ‘trend line’ over the last nine years.
This applies only to the following methods of measurement – the two satellite microwave, Argos ocean buoys, radiosonde balloons and rural thermometer methods.

The ground thermometer measurements around cities have all shown an increase (the ‘Island heat effect’ due to growth), however these urban measurements are the only ones being quoted to support the anthropogenic global warming claim promoted by the IPCC and supported by CRU.
(You may remember the ‘climategate’ leaked emails – that emanated from CRU? Well their data supporting a warming trend has lately been seriously challenged with an Official Information Request – and they have been unable to answer as their data accuracy has been shown faulty from comprised convoluted dubious adjustments.)

I say the IPCC and CRU issue incorrect warming data not supported by real world measurements from all the other methods. One of the data group must be wrong, and seeing EVERY one of the 23 computer models the IPCC has been relying on in their AR4 report, is reading ‘too high’, then I know which data set I believe to be accurate.

So if we discount the IPCC data and follow the far more accurate multi-system real world data, then there is no global warming trend, but a global cooling trend.

Yes but you have not considered the ‘feedback’ systems that will eventually trigger ‘catastrophic runaway global warming’ claim the shrill doomsday voices. Oh yeah?
I have been waiting almost 34 years for that James Hansen hypothesis prediction to show – when will it finally be acknowledged that it is based on junk science spewed out by those ever reducing fringe scientists desperate for their next free grant.

Follow the 2 trillion $$$ money trail and be prepared to learn about the giant confidence trick called AGW.

Now every good sceptic is not a ‘denier’ of global warming. We all agree that this earth has been climbing out of a mini- ice age back to the lovely warm climate similar to that which the Romans enjoyed in 1200AD (when the English made good red wine - read your history books). This warming has been mainly driven by the Sun and to a barely measureable degree by man, but sadly our sun has gone into a decline lately and the prognoses is for a coming Daulton or even worst, a Maunder minimum instead.
Look to your history of 1645 to know how frightening that cold period was.

You better hope this cooling hypothesis is wrong and that James Hansen is partially right. In four years time (the second half of solar cycle 24), I will give you a trend that will no longer confuse. I wrote the same thoughts four years ago on Ecobob threads and so far they are proving correct.

Rex

Re: White roofs 

@ Rex
I too have no idea whether global warming is a happening thing and statistics always was one of the 'Dark Arts"
Just a question for you...
In every system a change in inputs WILL result in a change in outputs...
So we ARE pumping co2 into the atmosphere at a rate far beyond anything seen prior to the 'oil age'.
What do you think the 'output' will be?

Re: White roofs 

Hello Samian,
“we ARE pumping co2 into the atmosphere at a rate far beyond anything seen prior to the 'oil age'.
What do you think the 'output' will be?”

You are correct and that is a fair question, but first some background.
The answer is found in palaeontology and geological history.
During the Devonian period 400 million years ago, the atmospheric CO2 was 4000ppmv compared to today’s 390ppmv. Our ‘chaotic’ climate system balanced itself without any ‘run-away global warming’ triggered by ‘feedback’ effects.
This is the crux of the present debate and the IPCC has been shown up as overestimating the possible – maybe – estimated – guessed - computer modelled effects by a factor of 6 times too high.
So why are they still in business? Follow the money trail.

Then at 320 million years ago the sun went into a dimming phase and our Earth into an ice age that killed off most living things. The 4000ppmv CO2 was absorbed by the cooling oceans and dropped to 180ppmv – no plant life can grow at less than 220ppmv.

Then 250 million years ago, the sun warmed the Earth back to 22oC (we are currently at about 15oC) and the stored CO2 was released by this heating of the oceans and rose back to 2000ppmv.

The rise and fall of stored CO2 and therefore atmospheric CO2 is always triggered by what we know as the ‘CO2 cycle’ and is completely natural.
The proof is derived from the Vostok ice cores which clearly show that CO2 rise and fall ALWAYS follows temperature rise and fall.

ANSWER:
Man’s burning of fossil fuel could not have been a factor.
Earth’s natural cycle always dwarfs man’s puny output.
A paper by David Archibald (Past and future climate change) calculates that if man burned all the Earth’s stored hydrocarbons over the next 200 years, we would add an increase of about 0.6oC to global temperature. Even if he is wrong by 100%, and it is say 1.2oC, this rise from current to 16.2oC would just about bring us back the 1200AD Roman optimum warm period and in my eyes this would be an excellent result for our world. That was the period of plenty – plenty of food and great strides forward for mankind.

It is cold that is the killer of man, not heat. Cold brings famine, increased disease and triggers war from mass migration toward the equator.

Ironically, if we add more man made CO2 into our atmosphere, we might partially compensate for our currently dimming sun – I hope.

Rex