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by brainpanhandler » Wed Dec 10, 2014 4:35 am
Ben D » Wed Dec 10, 2014 2:01 am wrote:Iam...so Dr Spencer is a Christian, that has nothing to do with his science...
you're right on the ultimate uselessness of the arguin...cos mother nature will have the last laugh.
by Ben D » Wed Dec 10, 2014 6:06 am
I've missed you...God bless..
by brainpanhandler » Wed Dec 10, 2014 3:55 pm
And I you old chap. I see you've not lost your sense of humor.Ben D » Wed Dec 10, 2014 5:06 am wrote:I've missed you.
by Ben D » Wed Dec 10, 2014 4:46 pm
by stillrobertpaulsen » Fri Dec 12, 2014 6:00 pm
Study finds early warning signals of abrupt climate change
Dec 08, 2014
Credit: Tiago Fioreze / Wikipedia
A new study by researchers at the University of Exeter has found early warning signals of a reorganisation of the Atlantic oceans' circulation which could have a profound impact on the global climate system.
The research, published today in the journal Nature Communications, used a simulation from a highly complex model to analyse the Atlantic Meridional Overturning Circulation (AMOC), an important component of the Earth's climate system.
It showed that early warning signals are present up to 250 years before it collapses, suggesting that scientists could monitor the real world overturning circulation for the same signals.
The AMOC is like a conveyor belt in the ocean, driven by the salinity and temperature of the water. The system transports heat energy from the tropics and Southern Hemisphere to the North Atlantic, where it is transferred to the atmosphere.
Experiments suggest that if the AMOC is 'switched off' by extra freshwater entering the North Atlantic, surface air temperature in the North Atlantic region would cool by around 1-3°C, with enhanced cooling of up to 8°C in the worst affected regions.
The collapse would also encourage drought in the Sahel - the area just south of the Sahara desert - and dynamic changes in sea level of up to 80cm along the coasts of Europe and North America.
"We found that natural fluctuations in the circulation were getting longer-lived as the collapse was approached, a phenomenon known as critical slowing down," said lead author Chris Boulton.
"We don't know how close we are to a collapse of the circulation, but a real world early warning could help us prevent it, or at least prepare for the consequences" adds co-author Professor Tim Lenton.
The study is the most realistic simulation of the climate system in which this type of early warning signal has been tested.
"The best early warning signals in the model world are in places where major efforts are going into monitoring the circulation in the real world - so these efforts could have unexpected added value' adds Professor Lenton.
by coffin_dodger » Wed Dec 17, 2014 9:34 am
Arctic ground squirrels unlock permafrost carbon BBC News 17 Dec 2014
Arctic ground squirrels could play a greater role in climate change than was previously thought.
Scientists have found that the animals are hastening the release of greenhouse gases from the permafrost - a vast, frozen store of carbon.
cont - http://www.bbc.co.uk/news/science-environment-30456869
by Iamwhomiam » Thu Dec 18, 2014 4:37 pm
by KUAN » Mon Dec 22, 2014 5:39 am
by stillrobertpaulsen » Fri Dec 26, 2014 8:44 pm
Global warming will cut wheat yields, research shows
Production of wheat – one of the world’s most important staple crops – is set to fall by 6% for every 1C rise in temperature, say scientists
As the world’s population grows, pressure on staple crops such as wheat will increase. Photograph: David Sillitoe/Guardian
Global wheat yields are likely to fall significantly as climate change takes hold, new research has shown .
The researchers found that wheat production would fall by 6% for every 1C increase in temperatures. The world is now nearly certain to warm by up to 2C compared with pre-industrial levels, with political efforts concentrated on holding the potential temperature rise to no higher than that limit. But some analyses suggest that if greenhouse gas emissions continue to grow at current rates then warming of as much as 5C could be in store.
In forecasting the effect on wheat production – one of the world’s most important staple crops – the researchers tested 30 computer models against field experiments to establish the most likely scenario.
A fall of 6% in yield may not sound dramatic, but as the world’s population grows the pressure on staple crops will increase.
Food price riots have been seen in several developing countries following sudden rises of less than 10% in food prices in recent years, demonstrating the vulnerability of the poor to grain prices. The global population is currently over 7bn and is forecast to rise to at least 9bn, and potentially up to 12bn, by 2050, which will put more pressure on agricultural land and water sources.
The research also counters the optimistic projections of some climate change sceptics, who argue that more carbon dioxide in the atmosphere will increase plant growth, as they take up carbon from the air for photosynthesis. But that hypothesis has been widely questioned, as the boost to growing is likely to be outweighed by other effects, such as higher temperatures affecting germination and water availability.
The scientists behind Monday’s report, published as a letter in the peer-review journal Nature Climate Change, said: “Understanding how different climate factors interact and impact food production is essential when reaching decisions on how to adapt to the effects of climate change. Temperature changes alone are reported to have potentially large negative impacts on crop production, and hotspots — locations where plants suffer from high temperature stress — have been identified across the globe.”
Their research could be used to help identify adaptation strategies, potentially including genetic modification or improved plant breeding. “There are several adaptation options to counter the adverse effects of climate change on global wheat production — and for some regions this will be critical,” they said. “Ensemble crop modelling could be an important exploratory tool in breeding for identified genetic targets to extend grain filling, delay maturity [both of which increase the size of the crop] and improve heat tolerance in wheat cultivars and other cereals.”
The lead scientist was from the University of Florida, while a large number of other US universities, and institutions in Germany, France, Mexico, Australia and China were also involved.
by Ben D » Fri Dec 26, 2014 9:47 pm
http://www.forbes.com/sites/jamestaylor/2014/12/26/wheat-production-sets-new-records-thanks-to-global-warming/
Wheat Production Sets New Records Thanks To Global Warming
12/26/2014
Global wheat production set new records in 2013 and 2014, contradicting alarmists’ claims that global warming is reducing wheat harvests.
Not only are global wheat yields not declining, they are rising at a spectacular pace. According to objective U.S. Department of Agriculture (USDA) data, global wheat yields have risen by 33 percent since 1994. Moreover, there has been a 4 percent increase in areas harvested for wheat, indicating increased atmospheric carbon dioxide, improved soil moisture, and global warming are making more lands suitable for wheat harvests. Cumulatively, the 33 percent increase in wheat yield per acre and the 4 percent increase in land harvested for wheat add up to a near 40 percent increase in the global wheat harvest since 1994.
The spectacular gains in wheat yields show no signs of slowing down as the Earth continues its modest warming. The year 2014 saw the highest global wheat yield in history, exceeding the 2013 yield that had also set a new record.
by Luther Blissett » Sat Dec 27, 2014 11:20 am
by 82_28 » Sat Dec 27, 2014 11:25 am
Ben D » Fri Dec 26, 2014 5:47 pm wrote:Actual reality trumps agw computer models of reality....http://www.forbes.com/sites/jamestaylor/2014/12/26/wheat-production-sets-new-records-thanks-to-global-warming/
Wheat Production Sets New Records Thanks To Global Warming
12/26/2014
Global wheat production set new records in 2013 and 2014, contradicting alarmists’ claims that global warming is reducing wheat harvests.
Not only are global wheat yields not declining, they are rising at a spectacular pace. According to objective U.S. Department of Agriculture (USDA) data, global wheat yields have risen by 33 percent since 1994. Moreover, there has been a 4 percent increase in areas harvested for wheat, indicating increased atmospheric carbon dioxide, improved soil moisture, and global warming are making more lands suitable for wheat harvests. Cumulatively, the 33 percent increase in wheat yield per acre and the 4 percent increase in land harvested for wheat add up to a near 40 percent increase in the global wheat harvest since 1994.
The spectacular gains in wheat yields show no signs of slowing down as the Earth continues its modest warming. The year 2014 saw the highest global wheat yield in history, exceeding the 2013 yield that had also set a new record.
by Ben D » Sat Dec 27, 2014 7:48 pm
Luther Blissett » Sun Dec 28, 2014 1:20 am wrote:Forbes will print any "pro-status quo" content for the right price, letting external PR hacks guide the creation process on top of it. I have personally witnessed this. I suspect this much is the same for many other "pro-business" publications.
by Iamwhomiam » Sat Dec 27, 2014 10:51 pm
Ben D » Fri Dec 26, 2014 9:47 pm wrote:Actual reality trumps agw computer models of reality....http://www.forbes.com/sites/jamestaylor/2014/12/26/wheat-production-sets-new-records-thanks-to-global-warming/
Wheat Production Sets New Records Thanks To Global Warming
12/26/2014
Global wheat production set new records in 2013 and 2014, contradicting alarmists’ claims that global warming is reducing wheat harvests.
Not only are global wheat yields not declining, they are rising at a spectacular pace. According to objective U.S. Department of Agriculture (USDA) data, global wheat yields have risen by 33 percent since 1994. Moreover, there has been a 4 percent increase in areas harvested for wheat, indicating increased atmospheric carbon dioxide, improved soil moisture, and global warming are making more lands suitable for wheat harvests. Cumulatively, the 33 percent increase in wheat yield per acre and the 4 percent increase in land harvested for wheat add up to a near 40 percent increase in the global wheat harvest since 1994.
The spectacular gains in wheat yields show no signs of slowing down as the Earth continues its modest warming. The year 2014 saw the highest global wheat yield in history, exceeding the 2013 yield that had also set a new record.
by slimmouse » Sat Dec 27, 2014 11:51 pm
Iamwhomiam wrote:The gains in production are due to many things though an excess of carbon dioxide in our upper atmosphere is not one that contributed negligibly. Improved fertilizers and genetically modified crops are the most substantial of reasons for the growth in production.
Topics include how agrochemicals are the old war industry reinvented, the patenting of seeds via genetic engineering and fraudulent intellectual property rights to life because inserting a gene into a plant doesn’t create the plant itself, using GM to artificially create patented GMO bananas which already exist, thus stealing from nature or other culture’s selective breeding, how they wish to create a system of total control of life on Earth, farmers being penalised for collecting seeds, pest epidemics caused by GMOs which were supposed to be pest resistant, leading to more pesticides being used instead, Indian Farmer suicides escalating since Monsanto, and much more.
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