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Global carbon dioxide levels near worrisome milestone: CO2 will soon surpass 400 ppm!

Global carbon dioxide levels near worrisome milestone: CO2 will soon surpass 400 ppm! | Natural disasters, Climate change | Scoop.it

Near the moonscape summit of the Mauna Loa volcano in Hawaii, an infrared analyser will soon make history. Sometime in the next month, it is expected to record a daily concentration of carbon dioxide in the atmosphere of more than 400 parts per million (p.p.m.), a value not reached at this key surveillance point for a few million years.

There will be no balloons or noisemakers to celebrate the event.

 

Researchers who monitor greenhouse gases will regard it more as a disturbing marker of humanity’s power to alter the chemistry of the atmosphere and by extension, the climate of the planet. At 400 p.p.m., nations will have a difficult time keeping global warming in check, says Corinne Le Quéré, a climate researcher at the University of East Anglia in Norwich, UK, who says that the impact “is getting very dangerously close to reaching the 2 °C target that governments around the world have pledged not to exceed”.

 

It will be a while, perhaps a few years, before the global CO2 concentration averaged over an entire year, passes 400 p.p.m.. But topping that value at Mauna Loa is significant because researchers have been monitoring the gas there since 1958, longer than any other spot. “It’s a time to take stock of where we are and where we’re going,” says Ralph Keeling, a geochemist at the Scripps Institution of Oceanography in La Jolla, California, who oversees that centre’s CO2 monitoring efforts on Mauna Loa. That gas record, known as the Keeling curve, was started by his father, Charles Keeling.


Via Dr. Stefan Gruenwald
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More famine likely as climate warms, Oxfam warns.

More famine likely as climate warms, Oxfam warns. | Natural disasters, Climate change | Scoop.it

"More famine likely as climate warms, Oxfam warns; says the world will see more of these issues if countries don't act to mitigate warming."

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Global Warming: The Four Noble Half-Truths

Global Warming: The Four Noble Half-Truths | Natural disasters, Climate change | Scoop.it
One of the fun things about the Global Warming debate is how many different fields of knowledge it draws on. What is the temperature and acidity of the ocean? How has the beta radiation emitted by the sun varied?
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World on course for catastrophic 6° rise, reveal scientists

The world is now firmly on course for the worst-case scenario in terms of climate change, with average global temperatures rising by up to 6C by the end of the century, leading scientists said yesterday.
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