Too Hot wrote:Quote:
Just wait until the ice melts and the warm water conveyor gets turned off. Then we will have cold winters around Britain. Travis
And that will happen as a result on mans activity will it? This statement is also a theory and based solely on assumption because no-one really knows what will happen and what does happen to that cold water. The problem with the theory is that both the Gulf Stream and North Atlantic Drift Current are surface currents and cold water will actually sink to the bottom of the ocean to get caught up in conveyor currents taking the underlying cold water south. There is no evidence at all to suggest that the cold water will stay on the surface and therefore affect surface currents. Notwithstanding this, the Atlantic conveyor which was believed by scientists to be the alleged engine of the Gulf Stream switched off in 1998 and was inactive for ten years, restarting again in 2008. The predicted shutdown of the Gulf Stream never happened and business (climate) continued as usual:
www.whoi.edu/page.do?pid=12455&tid=282&cid=54347
the fact is that the Atlantic conveyor system and the Gulf Stream NEED cold water because it is dense and heavier than the surrounding water and creates the momentum for the mass movement of sea currents.
Personally, I think that too much credence is placed on scientific theories when simple answers to all our questions are all around us and the facts are based on the simplest scientific experiments that we did at school and NOT on complex and fudged computer models.
1) CO2 is a dense, heavier than air and will naturally "sink" to the earth’s surface to be consumed by nature's requirements. The effect of CO2 is to give a relative "dense" atmosphere shielding us from the worst effects of the sun. A thin atmosphere would result in more global warming because of the unrestrained radiated heat from the sun.
2) Water vapour (clouds) have a blanket effect on our climate, CO2 doesn't. Nothing has changed in this respect - clear nights mean that the warmth of the earth radiates out to space, cloud cover gives relatively "warmer" nights because of the blanket effect of the cloud. CO2 does not work in this way and we can see this simply and with our own eyes in every day life.
The Copenhagen fudge was the beginning of the end for the warming alarmists and the dissenting voices are getting louder and more vociferous. Belief in man made climate change has dropped since Climategate and since Copenhagen and no right minded resident of the northern hemisphere this winter will escape what their eyes are telling them and what they can see out of their window.
I try and not get involved with climate change debate because it is a very emotive subject and proving the effects of man's activity on the earth is not really an exact science.
One of the reasons we don't want to stand up and be counted with regards man-made climate change is as a species we are quite selfish and don't want to give up our material goods therefore we will look to blame everything else rather than ourselves.
OK, back to the quoted post I have pasted above I would like to comment as follows;
1) The Atlantic Conveyor is a saline system, you can dissolve more salt in warm water than cold, more salt dissolved = heavier liquid. The heavy warm liquid sinks displacing the cold liquid eventually an imbalance occurs and the conveyor stops, not a momentary stop like the recent 10 year stoppage but for 1000's of years. Our localised temperate climate will become similar to Canada's.
2) I am not aware of any scientist claiming CO2 in the atmosphere is causing the climate change. The additional CO2 we produce is being absorbed by the sea, salt water is a massive CO2 capture system, now since the CO2 it absorbs has an energy content then there is a heat transference to the sea, warming the sea up this produces more water vapour, the water vapour covers more land mass thereby increasing the local temperature where it covers. This has an effect of also increasing the earth’s albedo (reflectiveness) this deflects the suns rays and cools the earth. So we have localised heating and cooling effects (greater wind, more hurricanes etc and yes we are seeing a greater amount of hurricanes per season than ever before)
3) CO2 is also absorbed by the forests, especially in the Amazon basin, but unfortunately we are cutting these down, therefore we are reducing the carbon/oxygen exchange system in nature. This will have several affects, even if we were not increasing the amount of CO2 in the earth’s atmosphere our predilection for this timber will increase the amount of CO2 and that will result with more CO2 being absorbed by sea water see item 1.
4) Cutting down of forests will result in more desert areas….increasing our albedo, reflecting the energy from the sun.
5) Increasing the CO2 in the salt water will increase the seas temperature, this isn’t a statement that can be argued with it’s a given. Pump a warming gas like CO2 into water then the calorific value of sea water will increase. This slight temperature increase will cause more mass ice to melt at the poles. The mass ice being pure will decrease the salinity of the seas and decrease the effect of the atlantic conveyor and other sea current movements that rely on the saline effect.
6) Causing the polar caps to melt will reduce the albedo effect of the poles (sea water being darker than ice) And so we have another effect of increasing the seas temperature. Now since the sea has more dissolved carbon in it because of the cutting down of the trees it has a greater capacity for absorbing heating…and suddenly we have a run away greenhouse effect.
A run-away greenhouse effect will blanket the Earth in water vapour. The earths temperature will increase due to the cloud cover, the cloud cover will become poisonous and acidic as more and more molecules are dissolved within it.
For an example of this happening read Cosmos by Carl Sagan, Chapter Heaven and Hell
So overall we have a few effects countering each other in the short term but in the long term the result will be a total blanketing of the earth in cloud cover.