Earthrise
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Picture take on last of apollo missions - Apollo 17 December 11th 1972. Only picture of Earth from space that we ahve where the sun was directly behind the spacecraft so that the Earth is fully lit up.
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People think that because the Earth is so big we couldnt possibly do anything to it to cause the global warming. The most vulnerable part of Earth is the Earths atmosphere. because its so thin. Think of a globe with a coat of varnish on it, that is how thin the atmosphere is, and its thin enough for us to change it.
Solar radiation in the form of light waves pass through the atmosphere. Most of the radiation that comes from the sun that hits the Earth is absorbed and warms up. Some of it goes back into Space. Some also trapped into the atmosphere keeping it warm.
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The atmosphere is thickening due to the pollution which helps more of the infra red trapped in the atmosphere. So the atmosphere heats up worldwide.
Very little land mass is South of the Equator and most of it is in the nOrthern Hemisphere, same as vegetation. When the northern hemisphere is tilted towards the sun in spring and summer the leaves take in CO2 so the amount in global atmosphere goes down. But when it is tilted away from the sun in autumn and winter the CO2 goes up. And the level keeps going up and we are seeing the impacts.
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When there is more carbon dioxide the temp gets warmer as it traps more heat from the sun.
The ocean temperatures have also gone up, which results in hurricanes that are more deadly
Florida - Hurricane Jean sept 04
Atlantic Ocean - Frances - Sept 04
Florida - Ivan Sept 04
Also saw record outbreak of tornadoes - 2004 - 1,717 in America
Japan - New record of typhoons - 10 in 2004
First ever hurricane in the SOuth Atlantic - Brazil - MArch 04
Caribbean - hurricane emily - July 05
Hurricane Denis - Florida July 05
Worlds largest oil platform Gulf of mexico - july 05
Hurricane Katrina August 05 - as it hit the gulf of Mexico in the warm waters it got stronger..
Global warming causes more precipitation but all in big storm events as the oceans put all the evaporation up there and more falls down.
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In 2005 nature went crazy
Mumbai India July 05
37 inches of rain in 24 hours
Water levels 7 feet
Global warming also causes more draught
Lake chad has all gone
Artic and greenland are having faster impacts. The largest ice shelf in the artic cracked in half. The perma frost is thawing also. The artic ice cap has deminished 40% and 40 years. When sun rays hit the ice it melts, and as it does it also heats up the water which makes the melting faster and will keep doing so. The worldwide average temperature is about 58 degress add about 5 degrees it will be +12 at the pole.
So all the ocean currents will change.
A pool in america broke into the Atlantic into the salt water which made the gulf shut off and heat transfer stopped which caused an ice age and it took place in just 10 years time. But it cant happen again as that chunk of ice is gone.
The change is also happening in the seasons Bird arrival in switzerland 25 years ago was April 25th and the chicks hatched June 3rd. Time of the caterpillars. But 20 years of warming later the caterpillars peeked May 15th and the birds try to catch up May 25th.
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It happened rapidly.
If the west antartica ice sheet melt it would raise sea level 20 feet.
When these different types of consequences hapen it will bring food and water demand.
We have the ability to stop this by using other resources.