Not exact matches
The contribution from Antarctica
adds up to 180
gigatonnes per year, but there is considerable uncertainty here because changes in the gravity field due to Earth's crust rebounding are less well understood over Antarctica than elsewhere.
«Unfortunately, if we
add up human emissions from the pre-industrial age to the present, then around 2000
gigatonnes out of the 5000 total have already been released into the atmosphere — so the situation is worrying,» explains Finnish Meteorological Institute researcher Antti - Ilari Partanen, who is currently carrying out research at Concordia University and was involved in the study.
That oil in - place is heavy oil, with a density close to a metric tonne per cubic meter, so the associated carbon
adds up to about 230
gigatonnes — essentially enough to close the «game over» gap.
To the carbon in conventional petroleum reserves you can
add about 100
gigatonnes C from proved natural gas reserves, based on the same sources as I used for oil.
Add 0.1 C and nature immediately
adds many
gigatonnes of CO2 to the atmosphere — showing carbon climate feedbacks are already a clear threat to maintaining stable temperatures
(So complete combustion of 1
gigatonne of coal, oil, or gas should
add respectively 0.138, 0.150, or 0.142 ppmv of CO2.)
http://www.skepticalscience.com/print.php?r=41 An asteroid strike that incinerates the surface of the planet will
add another 2000 - 3000
gigatonnes or so of CO2.
The UNEP Emissions Gap report underscored this lack of ambition and transparency by finding that weak rules, bad LULUCF accounting, and the potential carry - over of emissions credits could
add 1 - 2 Gt CO2e to the already sizeable
Gigatonne Gap.
However, this year, 50
gigatonnes of ice was
added just to lake Superior, Which rose 14 inches year over year, and is 32,700 square miles in area.
Just stick with how many
gigatonnes of CO2 are in the atmosphere, how many
gigatonnes have been
added by man and how many
gigatonnes of that remain.
Do you really want a further guaranteed 235
gigatonnes to
add to the current 850?
This is not surprising considering that each year about 750
gigatonnes of CO2 is
added to the atmosphere and a near equal amount is removed resulting in this 2ppmv increase but humans today only contribute 31gt of CO2 with the other 96 % coming from nature, so it is far more likely that observed increases in CO2 are primarily naturally sourced and not from humans.