: Sea Ice Update


screature
Aug 18th, 2009, 02:05 PM
Here is something that is very interesting and good news (unless you make your living by predicting the sky is falling). ;)

Sea ice update: Well above 2007 record minimum (http://www.examiner.com/x-5182-Dallas-Weather-Examiner~y2009m8d18-Sea-ice-update-Well-above-2007-record-minimum)

Arctic sea ice, used by many climatologists (and others) as a barometer of climate change, is once again running below the 1979-2000 average this summer. However, it remains well above the record minimum summer melt seen in 2007. In 2007, the ice coverage was approx. 5.2 million square km; this year for the same date (August 17) it is approx. 6.1 million sq. km.

Thus, it is about 22% below the 1979-2000 average whereas the 2007 reading was 32% below the norm; this represents an area about the size of Alaska in difference...

MacDoc
Aug 18th, 2009, 03:02 PM
Meaningless in any context you care to mention, when the ice shelves and multi-year ice return let us know.....a skim of 1st year ice after a double La Nina...denidiot fodder...nothing more..

The glaciers tell the tale....net mass loss accelerating.....

Pine Island Glacier is in the Amundsen Sea, part of the Southern Ocean bordering ... would raise global sea level by five meters (16 feet). ...

Antarctic Glacier Thinning At Alarming Rate

ScienceDaily (Aug. 15, 2009) — The thinning of a gigantic glacier in Antarctica is accelerating, scientists report. The Pine Island Glacier in West Antarctica, which is around twice the size of Scotland, is losing ice four times as fast as it was a decade years ago.

The research, published in the journal Geophysical Research Letters, also reveals that ice thinning is now occurring much further inland. At this rate scientists estimate that the main section of the glacier will have disappeared in just 100 years, six times sooner than was previously thought.

The Pine Island Glacier is located within the most inaccessible area of Antarctica – over 1000 km from the nearest research base – and was for many years overlooked. Now, scientists have been able to track the glacier's development using continuous satellite measurements over the past 15 years.

"Accelerated thinning of the Pine Island Glacier represents perhaps the greatest imbalance in the cryosphere today, and yet we would not have known about it if it weren't for a succession of satellite instruments," says Professor Andrew Shepherd, a co-author of the research from the School of Earth and Environment at the University of Leeds.

"Being able to assemble a continuous record of measurements over the past 15 years has provided us with the remarkable ability to identify both subtle and dramatic changes in ice that were previously hidden," he adds.

Scientists believe that the retreat of glaciers in this sector of Antarctica is caused by warming of the surrounding oceans, though it is too early to link such a trend to global warming.

The 5,400 km squared region of the Pine Island Glacier affected today is big enough to impact the rate at which sea level rise around the world.

"Because the Pine Island Glacier contains enough ice to almost double the IPCC's best estimate of 21st century sea level rise, the manner in which the glacier will respond to the accelerated thinning is a matter of great concern," says Professor Shepherd.

The research was led by Professor Duncan Wingham at University College London, and was funded by the UK Natural Environment Research Council.

Antarctic Glacier Thinning At Alarming Rate (http://www.sciencedaily.com/releases/2009/08/090814100105.htm)

screature
Aug 18th, 2009, 03:07 PM
^^^ Now why would I have expected anything less...

Scientists believe that the retreat of glaciers in this sector of Antarctica is caused by warming of the surrounding oceans, though it is too early to link such a trend to global warming.

MannyP Design
Aug 18th, 2009, 03:28 PM
Scientists believe that the retreat of glaciers in this sector of Antarctica is caused by warming of the surrounding oceans, though it is too early to link such a trend to global warming.

I think that line is worth repeating (again) for those in the peanut gallery.

MacDoc
Aug 18th, 2009, 03:55 PM
Sure - it's the hot air from the denidiots.....what the hell do you think is causing net glacial mass loss worldwide.... :rolleyes:

Lets put the the Arctic in context

Conditions in context

The average pace of ice loss during July 2009 was nearly identical to that of July 2007. Ice loss sped up during the third week of July, and slowed again during the last few days of the month.

Averaged for the month, July 2009 saw a decline rate in ice extent of 106,000 square kilometers (41,000 square miles) per day. For comparison, the rate of decline for July 2007 was 107,000 square kilometers (41,000 square miles) per day and the July 2008 rate of decline was 94,000 square kilometers (36,000 square miles) per day. The Arctic Ocean lost a total of 3.19 million square kilometers (1.23 million square miles) of ice during July 2009, and dropped below ice extent at this time in 2008.
average monthly data from 1979-2009 for July Figure 3. Monthly July ice extent for 1979 to 2009 shows a decline of 6.1% per decade.
—Credit: National Snow and Ice Data Center

http://nsidc.org/images/arcticseaicenews/20090804_Figure2_thumb.png

July 2009 compared to past years

Ice extent averaged for July 2009 was the third lowest in the satellite record for the month of July. The long-term trend indicates a decline of 6.1% per decade in July ice extent since 1979, relative to the 1979 to 2000 average, an average of 62,000 square kilometers (24,000 square miles) of ice per year.


Net Mass loss is what counts..

http://www.realclimate.org/images/cum_bal_total.jpg

.and loss of ice shelves.....the Arctic has just about zero left now

Massive Canadian Arctic ice shelf breaks away

14:57 03 September 2008 by New Scientist staff and Reuters
For similar stories, visit the Climate Change Topic Guide
A huge 55-square-kilometre ice shelf in Canada's northern Arctic broke away last month and the remaining shelves have shrunk at a "massive and disturbing" rate. These are the latest signs of accelerating climate change in the remote region, scientists said on Tuesday.

They said the Markham Ice Shelf, one of just five remaining ice shelves in the Canadian Arctic, split away from Ellesmere Island in early August. They also said two large chunks totalling 120 square km had broken off the nearby Serson Ice Shelf, reducing it in size by 60%.

"The changes ... were massive and disturbing," says Warwick Vincent, director of the Centre for Northern Studies at Laval University in Quebec.

Temperatures in large parts of the Arctic have risen far faster than the global average in recent decades, a development that experts say is linked to global warming.

"These substantial calving events underscore the rapidity of changes taking place in the Arctic," says Derek Mueller, an Arctic ice shelf specialist at Trent University in Ontario.

End of an era

"These changes are irreversible under the present climate and indicate that the environmental conditions that have kept these ice shelves in balance for thousands of years are no longer present," he said.

Mueller said the total amount of ice lost from the shelves along Ellesmere Island this summer totalled 215 square km - more than three times the area of New York's Manhattan island.

The figure is more than 10 times the amount of ice shelf cover that scientists estimated on 30 July would vanish from around the island this summer.

Reduced sea ice conditions and unusually high air temperatures have facilitated the ice shelf losses," says Luke Copland of the University of Ottawa.

"Extensive new cracks across remaining parts of the largest remaining ice shelf, the Ward Hunt, mean that it will continue to disintegrate in the coming years," he said.

Destructive summer

The first sign of serious recent erosion in the five shelves came in late July, when sheets of ice totalling almost 21 square km broke off the Ward Hunt shelf. Since then the shelf has lost another 22 square km.

Ellesmere Island was once home to a single enormous ice shelf of around 9000 square km. All that is left of that shelf today are the four much smaller shelves that together cover only about 800 square km.
Massive Canadian Arctic ice shelf breaks away - environment - 03 September 2008 - New Scientist (http://www.newscientist.com/article/dn14656-massive-canadian-arctic-ice-shelf-breaks-away.html)

Why don't you inform yourself of the reality of what is occurring instead of promoting a failed meme that climate change induced by our activities isn't happening

Global Glacier Changes: facts and figures (http://www.grid.unep.ch/glaciers/)

You can choose to keep your head buried in denial but the changes are coming both to the climate and to the policies surrounding moving towards carbon neutral...they WILL affect you.

Carbon trading/taxes are coming

Nations are taking action - even China
China working on further national plan to address climate change:official_English_Xinhua (http://news.xinhuanet.com/english/2009-05/20/content_11403657.htm)

- tho Harper remains the Dino-of-the-Day in the environmental eyes.

The rest of the planet is getting on with it....

COPENHAGEN Climate Conference 2009 (http://www.erantis.com/events/denmark/copenhagen/climate-conference-2009/index.htm)

You can be informed or play the gibbering fool.....your choice.

MannyP Design
Aug 18th, 2009, 04:09 PM
MacDoc, you are a true Rockstar! Keep swinging for the fences, dude.

SINC
Aug 18th, 2009, 05:20 PM
The original post is just one more example of wrong science. How much more of it is wrong becomes the question?

screature
Aug 18th, 2009, 06:05 PM
The original post is just one more example of wrong science. How much more of it is wrong becomes the question?

How so? An honest question, not meant to be provocative.

SINC
Aug 18th, 2009, 06:37 PM
How so? An honest question, not meant to be provocative.

I did not take it that way. I simply mean that Ma Nature continues to defy science every time they think they have it figured out, so logically the next question becomes, how much of the science on global warming is flawed? Simple as that. Either that or you accept that science is always correct. I don't subscribe to that theory at all.

screature
Aug 18th, 2009, 07:30 PM
^^^ Ahh, I see...

MacDoc
Aug 21st, 2009, 02:24 AM
Keep that head buried.....

In hot water: World sets ocean temperature record (Update)
August 20th, 2009 in Space & Earth / Environment
In hot water: World sets ocean temperature record (AP)

http://www.physorg.com/newman/gfx/news/hires/inhotwaterwo.jpg

Luis Torres, right, plays with his son Angel, 6, in the waters off Pine Point Beach Wednesday, Aug. 19, 2009 in Scarborough, Maine. The world's oceans this summer are heating up to their warmest on record. (AP Photo/Joel Page)

(AP) -- Steve Kramer spent an hour and a half swimming in the ocean this week - in Maine.

The water temperature was 72 degrees - more like Ocean City, Md., this time of year. And Ocean City's water temp hit 88 degrees, toasty even by Miami Beach standards.

Kramer, 26, who lives in the seaside town of Scarborough, said it was the first time he's ever swam so long in Maine's coastal waters.

It's not just the ocean off the Northeast coast that is super-warm this summer. July was the hottest the world's oceans have been in almost 130 years of record-keeping.

The average water temperature worldwide was 62.6 degrees, according to the National Climatic Data Center, the branch of the U.S. government that keeps world weather records. June was only slightly cooler, while August could set another record, scientists say. The previous record was set in July 1998 during a powerful El Nino.

Meteorologists said there's a combination of forces at work: A natural El Nino weather pattern just getting started on top of worsening man-made global warming, and a dash of random weather variations. The resulting ocean heat is already harming threatened coral reefs. It could also hasten the melting of Arctic sea ice and help hurricanes strengthen.

The Gulf of Mexico, where warm water fuels hurricanes, has temperatures dancing around 90. Most of the water in the Northern Hemisphere has been considerably warmer than normal. The Mediterranean is about three degrees warmer than normal. Higher temperatures rule in the Pacific and Indian Oceans.

The phenomena is most noticeable near the Arctic, where water temperatures are as much as 10 degrees above average. The tongues of warm water could help melt sea ice from below and even cause thawing of ice sheets on Greenland, said Waleed Abdalati, director of the Earth Science and Observation Center at the University of Colorado.

Breaking heat records in water is more ominous as a sign of global warming than breaking temperature marks on land, because water takes longer to heat up and does not cool off as easily as land.

"This warm water we're seeing doesn't just disappear next year; it'll be around for a long time," said climate scientist Andrew Weaver of the University of Victoria in British Columbia. It takes five times more energy to warm water than land.

The warmer water "affects weather on the land," Weaver said. "This is another yet really important indicator of the change that's occurring."

Georgia Institute of Technology atmospheric science professor Judith Curry said water is warming in more places than usual, something that has not been seen in more than 50 years.

Add to that an unusual weather pattern this summer where the warmest temperatures seem to be just over oceans, while slightly cooler air is concentrated over land, said Deke Arndt, head of climate monitoring at the climate data center.

The pattern is so unusual that he suggested meteorologists may want to study that pattern to see what's behind it.

The effects of that warm water are already being seen in coral reefs, said C. Mark Eakin, coordinator of the National Oceanic and Atmospheric Administration's coral reef watch. Long-term excessive heat bleaches colorful coral reefs white and sometimes kills them.

Bleaching has started to crop up in the Florida Keys, Puerto Rico and the Virgin Islands. Typically, bleaching occurs after weeks or months of prolonged high water temperatures. That usually means September or even October in the Caribbean, said Eakin. He found bleaching in Guam Wednesday. It's too early to know if the coral will recover or die. Experts are "bracing for another bad year," he said.

The problems caused by the El Nino pattern are likely to get worse, the scientists say.

An El Nino occurs when part of the central Pacific warms up, which in turn changes weather patterns worldwide for many months. El Nino and its cooling flip side, La Nina, happen every few years.

During an El Nino, temperatures on water and land tend to rise in many places, leading to an increase in the overall global average temperature. An El Nino has other effects, too, including dampening Atlantic hurricane formation and increasing rainfall and mudslides in Southern California.

Warm water is a required fuel for hurricanes. What's happening in the oceans "will add extra juice to the hurricanes," Curry said.

Hurricane activity has been quiet for much of the summer, but that may change soon, she said. Hurricane Bill quickly became a major storm and the National Hurricane Center warned that warm waters are along the path of the hurricane for the next few days.

Hurricanes need specific air conditions, so warmer water alone does not necessarily mean more or bigger storms, said James Franklin, chief hurricane specialist at the National Hurricane Center in Miami.
In hot water: World sets ocean temperature record (Update) (http://www.physorg.com/print169993833.html)

and this El Nino has only just started to wind up