AndyH
Well-known member
Full Screen, if you please!
[youtube]http://www.youtube.com/watch?v=TmfcJP_0eMc[/youtube]
[youtube]http://www.youtube.com/watch?v=TmfcJP_0eMc[/youtube]
AndyH said:Full Screen, if you please!
[youtube]http://www.youtube.com/watch?v=TmfcJP_0eMc[/youtube]
I read it may have been this warm just 1500 years ago.evnow said:Of course, unprecedented as in since someone started keeping track.
There was no ice cover at all in the northern hemisphere a few million years back.
Anyone who said "people" are trying to take us back to the stone age chose the wrong age - "people" are trying to take us back to the age of dinosaurs.
I hope you aren't serious. If so, here is that argument debunked:smkettner said:I read it may have been this warm just 1500 years ago.
smkettner said:I read it may have been this warm just 1500 years ago.
Arctic sea ice has reached its lowest ever recorded extent, in 'dramatic changes', which signal that man-made global warming is having a major impact on the polar region. Drag the slider across the map (link below) to see how the ice has shrunk between 1979 and 2012:
...Satellite images show that the rapid summer melt has reduced the area of frozen sea to less than 3.5 million square kilometres this week – less than half the area typically occupied four decades ago.
Arctic sea ice cover has been shrinking since the 1970s when it averaged around 8m sq km a year, but such a dramatic collapse in ice cover in one year is highly unusual.
A record low in 2007 of 4.17m sq km was broken on 27 August 2012; further melting has since amounted to more than 500,000 sq km.
The record, which is based on a five-day average, is expected to be officially declared in the next few days by the National Snow and Ice Data Centre in Colorado. The NSIDC's data shows the sea ice extent is bumping along the bottom, with a new low of 3.421m sq km on Tuesday, which rose very slightly to 3.429m sq km on Wednesday and 3.45m sq km on Thursday...
One of the world's leading ice experts has predicted the final collapse of Arctic sea ice in summer months within four years.[/color]
In what he calls a "global disaster" now unfolding in northern latitudes as the sea area that freezes and melts each year shrinks to its lowest extent ever recorded, Prof Peter Wadhams of Cambridge University calls for "urgent" consideration of new ideas to reduce global temperatures.
In an email to the Guardian he says: "Climate change is no longer something we can aim to do something about in a few decades' time, and that we must not only urgently reduce CO2 emissions but must urgently examine other ways of slowing global warming, such as the various geoengineering ideas that have been put forward."
These include reflecting the sun's rays back into space, making clouds whiter and seeding the ocean with minerals to absorb more CO2.
Wadhams has spent many years collecting ice thickness data from submarines passing below the arctic ocean. He predicted the imminent break-up of sea ice in summer months in 2007, when the previous lowest extent of 4.17 million square kilometres was set. This year, it has unexpectedly plunged a further 500,000 sq km to less than 3.5m sq km. "I have been predicting [the collapse of sea ice in summer months] for many years. The main cause is simply global warming: as the climate has warmed there has been less ice growth during the winter and more ice melt during the summer.
"At first this didn't [get] noticed; the summer ice limits slowly shrank back, at a rate which suggested that the ice would last another 50 years or so. But in the end the summer melt overtook the winter growth such that the entire ice sheet melts or breaks up during the summer months.
"This collapse, I predicted would occur in 2015-16 at which time the summer Arctic (August to September) would become ice-free. The final collapse towards that state is now happening and will probably be complete by those dates"...
BOULDER, Colorado—Arctic sea ice cover likely melted to its minimum extent for the year on September 16, according to scientists at the National Snow and Ice Data Center (NSIDC). Sea ice extent fell to 3.41 million square kilometers (1.32 million square miles), now the lowest summer minimum extent in the satellite record.
“We are now in uncharted territory,” said NSIDC Director Mark Serreze. “While we’ve long known that as the planet warms up, changes would be seen first and be most pronounced in the Arctic, few of us were prepared for how rapidly the changes would actually occur.”
edatoakrun said:Sorry if this was posted earlier, but the future trend report (written last month) linked below was new to me this AM:
...In conclusion, it looks like there will be no sea ice from August 2015 through to October 2015, while a further three months look set to reach zero in 2017, 2018 and 2019 (respectively July, November and June). Before the start of the year 2020, in other words, there will be zero sea ice for the six months from June through to November...
http://arctic-news.blogspot.com/2012/09/piomas-data-confirm-exponential-trend.html" onclick="window.open(this.href);return false;
edatoakrun said:What do you want to bet that the same denialists that have bought us to the brink of "global disaster" by preventing all reasonable efforts to curb GHG emissions, will be the first to panic and demand large scale (and very profitable, to some, no doubt) geoengineering programs, to attempt to ameliorate the global disaster they have done so much to bring about?
Nope. Sure doesn't.WetEV said:... What happens in the Arctic doesn't stay in the Arctic.
Enter your email address to join: