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Study: Climate change slowed over last decade but may speed up again. ow.ly/lbu7S
Study: Climate change slowed over last decade but may speed up again
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Writing in the journal Nature Geoscience, an international team of climate scientists said a slower rate of warming increase observed from 2000 to 2009 suggested a “lower range of values” to be taken into account by policy makers.
While the last decade was the hottest since records began in 1880, the rate of increase showed a stabilisation despite ever-rising levels of Earth-warming greenhouse gases in the atmosphere.
Scientists have alternatively explained the flatter curve by oceanic heat capture, a decline in solar activity or an increase in volcanic aerosols that reflect the Sun’s rays.
Because of the hiatus, warming in the next 50 to 100 years “is likely to lie within the range of current climate models, but not at the high end of this range,” said Alexander Otto of Oxford University’s Environmental Change Institute, co-author of the new study.
Otto and his team used up-to-date data on temperatures and levels of solar radiation trapped in the atmosphere by greenhouse gases, to make new projections for climate warming.
The United Nations is targeting a global average maximum temperature rise of two degrees Celsius (3.6 degrees Fahrenheit) on pre-industrial levels, for what scientists believe would be manageable climate change.
In 2007, the UN’s Intergovernmental Panel on Climate Change (IPCC) warned in a report of the temperature rising by as much as 6.4 degrees C in the worst emissions scenario.
Study co-author Reto Knutti of ETH Zurich said data ruling out the most extreme scenarios for near-term warming was clearly welcome news.
“But even if the response is at the low end of the current range of uncertainty, we are still looking at warming well over the two-degree goal that countries have agreed upon.”
To meet the two-degree goal, countries are negotiating curbs to emissions of Earth-warming greenhouse gases released by fossil fuel burning.
Only last week, the level of carbon dioxide in Earth’s atmosphere breached a threshold of 400 parts per million — a level never experienced by humans and considered the absolute maximum for the two-degree target to remain within reach.
Many scientists believe that on current trends, Earth is set for warming much higher than the two-degree target.
Commenting on the publication, University of New South Wales climate researcher Steven Sherwood said the conclusions “need to be taken with a large grain of salt until we see what happens to the oceans over the coming years.”
The authors had partly based their finding on a higher-than-expected absorption of heat by the world’s oceans, he said, but other research has suggested this storage may reverse due to natural phenomena such as El Nino.
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Climate change slowed over last decade but may speed up again
One of my ideas that I have been thinking about for several years now is: grinding up Volcanic Glass into dust and sprinkle it with planes in the upper atmosphere in the Arctic. Since not many people are there it would be a test to see if snow mass could be retained by doing this as a form of weather control. If it worked there volcanic glass dust could be put in the atmosphere over countries that want to be cooler by planes, balloons or drones or whatever can lift that much dust without harming the plane or helicopter engines when it is released. Blimps could lift this weight too and just shut off their engines while the dust is being released into the winds. The dust keeps much of the sun from hitting the earth thereby reducing some of the heating effects of CO2 while we try to find a way to reduce CO2 here on earth. This way Billions of people won't have to die the next century or 2 from over 100 mph winds at various locations in storms as well as droughts and floods.
Volcanoes have done exactly what I'm talking about here for millions of years already on earth and some of the effects are the enrichment of soils and reductions in temperatures. Properly utilized it could save whole nations of people from weather related deaths in the future. Another way to do this would be to stimulate Volcanoes into spewing more volcanic ash but doing this might be more unpredictable as to what would happen to nations downwind.
That is why testing this idea in the Arctic where all ice soon will melt off every summer might be a good idea. It might even prevent the extinction of the Polar Bear. Right now it looks like the only Polar Bears to survive the coming Arctic Ice melt off will be Grolar Bears interbred with Grizzlies(Grolar: Grizzly Polar bear breeds).
One of my ideas that I have been thinking about for several years now is: grinding up Volcanic Glass into dust and sprinkle it with planes in the upper atmosphere in the Arctic. Since not many people are there it would be a test to see if snow mass could be retained by doing this as a form of weather control. If it worked there volcanic glass dust could be put in the atmosphere over countries that want to be cooler by planes, balloons or drones or whatever can lift that much dust without harming the plane or helicopter engines when it is released. Blimps could lift this weight too and just shut off their engines while the dust is being released into the winds. The dust keeps much of the sun from hitting the earth thereby reducing some of the heating effects of CO2 while we try to find a way to reduce CO2 here on earth. This way Billions of people won't have to die the next century or 2 from over 100 mph winds at various locations in storms as well as droughts and floods.
Volcanoes have done exactly what I'm talking about here for millions of years already on earth and some of the effects are the enrichment of soils and reductions in temperatures. Properly utilized it could save whole nations of people from weather related deaths in the future. Another way to do this would be to stimulate Volcanoes into spewing more volcanic ash but doing this might be more unpredictable as to what would happen to nations downwind.
That is why testing this idea in the Arctic where all ice soon will melt off every summer might be a good idea. It might even prevent the extinction of the Polar Bear. Right now it looks like the only Polar Bears to survive the coming Arctic Ice melt off will be Grolar Bears interbred with Grizzlies(Grolar: Grizzly Polar bear breeds).
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