SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?


To: Brumar89 who wrote (933190)5/3/2016 9:41:28 PM
From: Wharf Rat  Read Replies (3) | Respond to of 1572705
 
It means ice is melting rather quickly. The older the ice, the thicker it is.

BTW, just so you don't get confused, "ice free" does not mean there won't even be an ice cube; it means there will be less than 1 M Sq K.

Arctic Sea Ice is Falling off a Cliff and it May Not Survive The Summer

Near zero sea ice by the end of melt season. The dreaded Blue Ocean Event. Something that appears more and more likely to happen during 2016 with each passing day.

These are the kinds of climate-wrecking phase changes in the Arctic people have been worrying about since sea ice extent, area, and volume achieved gut-wrenching plunges during 2007 and 2012. Plunges that were far faster than sea ice melt rates predicted by model runs and by the then scientific consensus on how the Arctic Ocean ice would respond to human-forced warming this Century. For back during the first decade of the the 21st Century the mainstream scientific view was that Arctic sea ice would be about in the range that is today by around 2070 or 2080. And that we wouldn’t be contemplating the possibility of zero or near zero sea ice until the end of this Century.

But the amazing ability of an unconscionable fossil fuel emission to rapidly transform our world for the worst appears now to outweigh that cautious science. For during 2016, the Arctic is experiencing a record warm year like never before. Average temperatures over the region have been hitting unprecedented ranges. Temperatures that — when one who understands the sensitive nature of the Arctic looks at them — inspires feelings of dislocation and disbelief. For our Arctic sea ice coverage has been consistently in record low ranges throughout Winter, it has been following a steepening curve of loss since April, and it now appears to have started to fall off a cliff. Severe losses that are likely to both impact the Jet Stream and extreme weather formation in the Northern Hemisphere throughout the Spring and Summer of 2016.

Melting more than Two Weeks Faster than the Early 2000s

Since April 27th, according to a record of sea ice extent provided by JAXA, daily rates of sea ice loss have been in the range of 85,000 square kilometers for every 24 hour period. That’s 300,000 square kilometers of sea ice, or an area the size of New Mexico, lost in just four days. Only during 2015 have we ever seen such similarly rapid rates of loss for this time of year.



(We’ve never seen early season sea ice losses like this before. Severe sea ice losses of this variety can help to generate strong ridges and extreme heatwaves like the one we now see affecting India and Southeast Asia. Image source: JAXA.)

However, this excessive rate of loss is occurring across an Arctic region that features dramatically less ice (exceeding the 2015 mark for the same day by about 360,000 square kilometers) than any other comparable year for the same day. In essence, extent melt is now more than a week ahead of any other previous year. It is two and half weeks ahead of melt rates during the 2000s. And this year’s rate of decline is steepening.

Current melt rates, if maintained throughout summer, would wipe out practically all the ice. And, worryingly, this is a distinct possibility given the severely weakened state of the ice, the large areas of dark, open water available to absorb the sun’s rays as Summer progresses, and given the fact that Arctic heat is continuing in extreme record warm ranges. Furthermore, melt rates tend to seasonally steepen starting by mid June. So rapidly ramping rates of loss seen now, at the end of April and through to the start of May, may see further acceleration as more and more direct sunlight keeps falling on already large exposed areas of dark, heat-absorbing water.

Huge Holes in the Beaufort

All throughout the Arctic Basin, these sunlight-absorbing regions take up far more area than is typical. The Bering has melted very early. Baffin Bay is greatly withdrawn from typical years. Hudson Bay is starting to break up. The Barents and Greenland seas feature far more open water than is typical. However, there is no region showing more dramatic early season losses than the Beaufort.



(This Beaufort sea has never looked so bad off so early in the year. High amplitude waves in the Jet Stream continue to deliver record warmth, warm, wet winds, and record sea ice melt to this region of the Arctic. For reference, bottom of frame in this image is around 600 miles. The wispy threads you see in the image is cloud cover, the sections of solid white are snow and ice. And the blue you see is the open waters of the Arctic Ocean. Open water gap size in the widest sections is now more than 150 miles. Image source: LANCE-MODIS.)

There, ice continues to rapidly recede away from the Arctic Ocean shores of the Mackenzie Delta and the Canadian Archipelago — where a large gap has opened up in the sea ice. Now ranging from 70-150 miles in width, this area of open water consistently sees surface temperatures warm enough to melt sea ice (above 28 F or about -2 C).

This great body of open water the size of a sea in itself has now created a new early season edge zone for the ice. A place where a kind of mini-dipole can emerge between the more rapidly warming water surfaces and the cooler, reflective ice. Such a zone will tend to be a magnet for storms. And a low pressure system is expected to ride up an extreme bulge in the Jet Stream over Alaska and Canada and on into this Arctic zone over the next few days. Storms of this kind tend to hasten melt and break up of ice in the edge zones by generating waves, by pulling in warmer airs from the south, or by dropping liquid precipitation along the melting ice edge. And the fact that this kind of dynamic is setting up in the Beaufort in early May is nothing short of extraordinary.

Arctic Heat Like We’ve Never Seen Before

Further to the north, high pressure is expected to continue to dominate over the next seven days. This will generate further compaction of the already weak ice even as it allows more and more sunlight to fall over that greatly thinned white veil.



(The Arctic is now so warm that this graph is now too small to capture the excession of extreme heat in the region. Freezing degree days are now more than 1,000 less than during a typical year and the already much warmer than normal 1980 to 2000 period. Image source: CIRES.)

Temperatures for the Arctic are expected to range between 2.5 and 3.5 C above average over the next seven days. Very warm conditions that will continue to hammer freezing degree day totals that have now exceeded an unprecedented -1000 since the start of the year in the High Arctic region above the 80 degree North Latitude Line. In layman’s terms, the less freezing degree days the Arctic experiences, the closer it is to melting. And losing 1000 freezing degree days is like removing the coldest month of Winter entirely from the heat balance equation in this highest Latitude region of the Northern Hemisphere.

From just about every indicator, we find that the Arctic sea ice is being hit by heat like never before. And the disturbing precipitous early season losses we now see in combination with the excessive, extreme warmth and melt accelerating weather patterns are likely to continue to reinforce a trend of record losses. Such low sea ice measures will also tend to wrench weather patterns around the globe — providing zones for extreme heatwaves and droughts along the ridge lines and related warm wind invasions of the Arctic that will tend to develop all while generating risk of record precipitation events in the trough zones. To this point, the North American West is again setting up for just such a zonal heatwave pattern. Extreme heat building up in India and Southeast Asia also appears to be following a similar northward advance.

robertscribbler.com

Hat tip to Exxon Mobile (For its failure to report scientific findings on the impacts of climate change, and for its never-ending political and media campaign aimed at preventing effective climate change mitigation policy over the past 40+ years)



To: Brumar89 who wrote (933190)5/4/2016 7:27:23 AM
From: FJB1 Recommendation

Recommended By
Brumar89

  Read Replies (1) | Respond to of 1572705
 
An Inconvenient Review: After 10 Years Al Gore's Film Is Still Alarmingly Inaccurate

It’s been nearly one decade since former Vice President Al Gore released his film “An Inconvenient Truth.” It sent shockwaves through American politics and emboldened environmental activists to push for more regulations on American businesses.

Gore warned increasing carbon dioxide emissions would spur catastrophic global warming that would cause more extreme weather, wipe out cities and cause ecological collapse. To stop global warming, humans needed to ditch fossil fuels and basically change every aspect of their lives.

Watching “An Inconvenient Truth” is sort of like going back in time. Back to a world where flip phones were cool and “Futurama” was still putting out new episodes. A world where a bitter presidential candidate was trying to rebrand himself as an environmental crusader.

But have Gore’s warnings, which were alarming to many in 2006, come true?

In honor of the upcoming 10th anniversary, The Daily Caller News Foundation re-watched “An Inconvenient Truth” just to see how well Gore’s warnings of future climate disaster lined up with reality.

Gore’s been harping on global warming since at least the late 1980s, but it wasn’t until 2006 he discovered a way to become massively wealthy off making movies about it and investing in government-subsidized green energy.

Gore opens the film talking about nature, then jumping to a presentation he’s giving where he shows the first image ever taken of the Earth from space. From that image, he jumps right into making alarmist claims about global warming.

Kilimanjaro Still Has Snow

One of the first glaring claims Gore makes is about Mount Kilimanjaro in Africa. He claims Africa’s tallest peak will be snow-free “within the decade.” Gore shows slides of Kilimanjaro’s peak in the 1970s versus today to conclude the snow is disappearing.

Well, it’s been a decade and, yes, there’s still snow on Kilimanjaro year-round. It doesn’t take a scientist to figure this out. One can just look at recent photos posted on the travel website TripAdvisor.com.

In 2014, ecologists actually monitoring Kilimanjaro’s snowpack found it was not even close to being gone. It may have shrunk a little, but ecologists were confident it would be around for the foreseeable future.

“There are ongoing several studies, but preliminary findings show that the ice is nowhere near melting,” Imani Kikoti, an ecologist at Mount Kilimanjaro National Park, told eturbonews.com.

“Much as we agree that the snow has declined over centuries, but we are comfortable that its total melt will not happen in the near future,” he said.

Gore Left Out The 15-Year “Hiatus” In Warming

Gore also claims temperature rise from increases in man-made carbon dioxide emissions were “uninterrupted and intensifying.” He goes on to claim heatwaves will become more common, like the one that killed 35,000 people across Europe in 2003.

Sounds terrifying — until you actually look at what happened to global temperature after Gore’s film was released. Global temperatures showed little to no warming trend after Gore released his film. In fact, surface temperature data showed no significant global warming for a period of about 15 years, starting in the early 2000s.

Satellite-derived temperature data showed, until the recent El Niño, no statistically significant warming trend for more than 21 years.

Gore’s movie was released right in the middle of the so-called global warming “hiatus.”

The Weather Hasn’t Gotten Worse

Gore also famously predicted storms would become more frequent and intense as man-made emissions warmed the oceans.

“And of course when the oceans get warmer, that causes stronger storms,” Gore said in his film. “That same year that we had that string of big hurricanes, we also set an all-time record for tornadoes.”

Gore’s film came out just after Hurricane Katrina ravaged the Gulf Coast. Indeed, footage of the destruction from that storm featured prominently in Gore’s film. He mentions how the U.S. was hit with a rash of severe storms in the early 2000s and how Japan saw a record number of typhoons.

“The insurance industry has actually noticed this,” Gore said. “Their recovered losses are going up.”

But Gore’s claim is more hype than actual science, since storms aren’t more extreme since 2006. In fact, not even findings from the United Nations’s Intergovernmental Panel on Climate Change (IPCC) support Gore’s claim.

The IPCC found in 2103 there “is limited evidence of changes in extremes associated with other climate variables since the mid-20th century.” The IPCC also found “no significant observed trends in global tropical cyclone frequency over the past century” and “[n]o robust trends in annual numbers of tropical storms, hurricanes and major hurricanes counts have been identified over the past 100 years in the North Atlantic basin.”


Gore should probably take these findings seriously since he shared the Nobel Prize in 2007 with the IPCC for its work on global warming.

The North Pole Still Has Ice

Gore also claimed the Arctic could be ice-free in the coming decades. He said “within the next 50 to 70 years, it could be completely gone.”

With no Arctic sea ice, polar bears and all sorts of Arctic animals would be threatened, Gore warned, showing an animated scene of a polar bear drowning.

This is actually one of Gore’s more cautious predictions — he did incorrectly predict in 2008 there would be no Arctic ice by 2013. But even in this case, Gore is likely wrong because of the Arctic’s geographical setting.

The Arctic is almost completely surrounded by land, so the ice that forms there tends to stay there. Arctic ice coverage has shrunk in recent decades, but it’s not likely we will see even a summer where the North Pole is completely ice-free.

“I doubt the Arctic will be free of all ice in any summer, although the total area may well be greatly reduced in the future if it continues to warm there,” said Chip Knappenberger, a climate scientist at the libertarian Cato Institute.

“Such a situation should not be overly worrisome, as there is ample evidence that it has occurred in the past and clearly, polar bears, and everything else up there managed to survive,” Knappenberger said.

And before I forget, the latest data shows polar bears are actually thriving, despite shrinking ice coverage.

A “Day After Tomorrow”-Style Ice Age Is Still A Day Away

Remember the 2004 blockbuster film “The Day After Tomorrow”? In the movie, the Gulf Stream, which scientists say is essential for regulating the climate, shuts down and ends up causing another ice age.

Well, Gore hints this could happen if Greenland’s ice sheet melts and brings more cold water into the North Atlantic.

“At the end of the last ice age, as the last glacier was receding from North America, the ice melted and a giant pool of fresh water formed,” Gore said. “An ice dam on the eastern border formed and one day it broke.”

Gore said fresh, cold water bled out into the North Atlantic and caused the Gulf Stream to stall, which sent Europe into another ice age. Gore then suggests Greenland’s ice melt could pose a similar threat.

Australian scientists, however, totally debunked claims the Gulf Stream, or AMOC, was weakening.

“Claims of strengthening or reducing of the AMOC are therefore pure speculation,” Aussie scientists wrote in their paper published in March.