Carbon Dioxide Levels Topped 400 PPM Throughout Northern Hemisphere In
April, WMO Says
By Tom Miles
GENEVA, May 26 (Reuters) - Carbon dioxide levels throughout the northern
hemisphere hit 400 parts per million (ppm) for the first time in human history
in April, an ominous threshold for climate change, the World Meteorological
Organization said on Monday.
The 400 ppm level in the atmosphere, up 40 percent since wide use of fossil
fuels began with the Industrial Revolution, is rapidly spreading southwards.
First recorded in 2012 in the Arctic, it has since become the norm for the
The WMO expects the global annual average carbon dioxide concentration to be
above 400 ppm in 2015 or 2016. Rising concentrations of the heat-trapping gas
raise risks of more heatwaves, droughts and rising sea levels.
"Time is running out," WMO Secretary-General Michel Jarraud said in a
"This should serve as yet another wake-up call about the constantly rising
levels of greenhouse gases which are driving climate change. If we are to preserve
our planet for future generations, we need urgent action to curb new emissions
of these heat-trapping gases."
Almost 200 governments have agreed to work out a deal by the end of 2015 to
slow climate change as part of efforts to limit the average temperature
increase to two degrees Celsius (3.6 degrees Fahrenheit) above pre-industrial
Temperatures have already risen about 0.8C (1.4F).In April, the U.N.'s panel
of climate experts said that greenhouse gas concentrations, led by carbon
dioxide, would have to be kept below 450 ppm to
give a good chance of achieving the 2C goal.
The level of carbon dioxide in the atmosphere is seasonal, since plants absorb
more in the summer months, causing a peak in the spring. The northern
hemisphere, with more human-related sources of the gas, has a more pronounced
Carbon dioxide remains in the atmosphere for hundreds of years. It is emitted
by fossil-fueled vehicles and coal-fired factories and power plants as well as
by natural activities such as breathing.
During the last 800,000 years, the level of atmospheric carbon dioxide
fluctuated between 180 ppm and 280 ppm, and has probably not been above 400 ppm
for millions of years, scientists say.
With the widespread burning of coal and oil during the Industrial Revolution,
the concentration of carbon dioxide rose to about 290 ppm by the end of the
That accelerated last century, with levels between 370 and 380 ppm by the year
2000. An animated graph that shows the history of atmospheric carbon dioxide is
online at .
(Reporting by Tom Miles, editing by Alister Doyle)
levels throughout the northern hemisphere hit 400 parts per million (ppm) for
the first time in human history in April, an ominous threshold for climate
fucks to the Ass hole ‘World Meteorological Organization, go ahead and burn to
emit more carbon to make more money and dig graves for others till you start digging
your own graves and take all the wealth you make with you to your respective grave
to be more secured comfortable.
leaders of the world to doom the world as human no need for God to take the
trouble. Please do me one favor recommend me for Nobel Prize for pampering you all
to accomplish your most difficult and arduous endeavor to massacre the world
garlanded them with the same prize in huge numbers. Why not for me? Well if not
for me then do it for “World Meteorological Organization”.