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« Carbon emissions pose… | Home | Earth Day Today »

Arctic sea ice fights losing winter battle

20 04 09 - 16:32 Arctic sea ice fights losing winter battle


By Pete Spotts



Earth's crisp white skullcap of Arctic sea ice is emerging from winter much the worse for wear.

Scientists monitoring the ice's annual growth and contraction say the frigid sheath ended winter with the fifth-smallest geographic reach since 1979, when satellites first began tracking sea-ice trends. All six below-average winters have occurred between 2004 and 2009.

This year, winter ice also enters a new melt season with record-low levels of thick older ice, the kind that has has survived several summers. This is the ice that persists the longest to help cool the planet during summer; it reflects sunlight back into space during the Arctic's long hours of daylight - think 186 "days" of sunlight at the North Pole.

And it's the ice that provides the foundation for further thickening when sea ice expands again the following winter.

From 1981 to 2000, multiyear ice made up an average of 30 percent of the Arctic's ice cover at winter's end. Coming out of this winter, only 9.8 percent of the ice was of the multiyear persuasion. The culprit, say researchers with the National Snow and Ice Data Center and NASA's Jet Propulsion Laboratory, is global warming.

In addition, some naturally shifting climate patterns superimposed atop the long-term warming trend have contributed to the thinner, less extensive sea ice.

During the late 1980s through the mid 1990s, these natural variations got stuck in a phase that generated winds to drive large amounts of ice through the Fram Strait and out into the Greenland Sea, explains Walter Meier, a researcher with the National Snow and Ice Data Center in Boulder, Colo. In addition, warmer water from the Atlantic and Pacific has been moving north into the Arctic Basin.

"Since that period, we haven't seen a persistently strong Arctic Oscillation," he said during a briefing this morning. He was referring to the natural climate pattern involved. More recently, this pattern has entered a neutral or slightly weak phase. But, he adds, "we're still losing the summer ice and losing the thicker ice cover."

The persistently strong pattern toward the end of the last decade "may have played a role in triggering the loss of ice cover," he continued. But "it certainly is not the overriding factor in terms of long-term loss."

Going into this past winter, researchers say, things appeared to be looking up at the top of the world. The winter began with a larger inventory of two-year ice than the year before. But during the winter, much of that "tweenage" ice blew out through the Fram Strait toward lower latitudes and melted. This boosted the proportion of single-year ice in the Arctic.

What's ahead?

The multitrillion dollar question: What happens next?

Researchers from the University of Washington and NOAA's Pacific Marine Environmental Laboratory have taken a stab at answering the question.

In a research paper published in the current issue of Geophysical Research Letters, they estimate that by 2037, the Arctic Ocean will be virtually ice-free in September. And it's not out of the question to expect a nearly ice-free September by 2028.

They base their work on modeling exercises in which they picked a handful of models (six) out of the entire batch the Intergovernmental Panel on Climate Change used for its 2007 reports on the state of climate science. These six did the best job of reconstructing the Arctic's past climate, particularly the coming and going of sea ice with the seasons.

Then they combined two emissions scenarios - business as usual and another close relative - from the IPCC reports. (Worldwide emissions of CO2 are exceeding business as usual by a long shot.)

They used 2007's summer sea ice levels as a starting point. Then they ran each model several times, and with slightly different starting conditions to mimic the climate's natural variations. Then they averaged the results to filter out natural variations and spot the projected trend.

Others have suggested the summer ice could vanish by 2013 or 2014.

And Dr. Meier's view?

For his part, Dr. Meier is reluctant to estimate the time when the Arctic Ocean will be ice-free in the summer.

"I certainly wouldn't want to put money on a given year," he says.

Ice-free summers by 2013 or 2014 "seems fairly unlikely," he continues. "But it's not totally outside the realm of possibility."

That's a change from five years ago, he adds. "Such a suggestion would have been laughed out of the room. Now I think you have to say: 'Well, that's really unlikely to happen; but if things happen just the right way, it could.' "

More summers like 2007's could accelerate the loss; summers like last year's could slow the process a bit. Used tags: , , , , , , ,
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Raging wildfires: Climate changes to blame for record season?

Saturday 16 July 2011 at 06:07 am Raging wildfires: Climate changes to blame for record season?


By Pete Spotts


The images are stark: soot-grimed firefighters steering bulldozers or wielding shovels to clear underbrush; curtains of orange flame tracing the contours of summits; aircraft dumping chemicals to slow a fire's progress.

Between Jan. 1 and early July of 2011, slightly more than 38,000 wildfires charred the landscape in the United States at a record pace. So far this year, wildfires have consumed just under 4.9 million acres of forest and grassland, a cumulative expanse the size of New Jersey.

That's 1 million more acres than fires consumed during the same period in 2006, which saw a record 9.9 million acres burned for the entire year.

Beyond the numbers, this year's fires may provide the first large-scale tests of the effectiveness of projects undertaken over the past decade to help forests survive wildfires, several specialists say.

The West's forests are adapted to deal with certain types of wildfires, researchers note. But since the mid-1980s, they add, some of these forests have experienced an increasing number of fires to which they are not well adapted.

Many researchers trace this shift in part to climate change. more

Hybrid Moves Into Housing

Sunday 22 May 2011 at 01:14 am Hybrid Moves Into Housing


By Brenda Krueger Huffman

(Chicago) – Recycling - Check. Conserving energy - Check. Hybrid car - Next car, check. Hybrid home system - What? Yes, it’s here. Hybrid has seamlessly, successfully moved into housing.

Safety Power, Inc. was initially started to provide homes with back up power. The company quickly grew to include renewable energy options and advising commercial and industrial clients with electrical conservation. Recently the company has come full circle and began marketing a new more capable type of renewable energy system for homes.

The award winning firm was voted one of the “Top 5 Sustainable Product Companies in Illinois” and continues to grow its residential client base in Illinois, Indiana, and Wisconsin. Safety Power also serves larger firms on the national level.

Robert Brazzale, President of Safety Power, a master electrician turned entrepreneur, began Safety Power in 2007. An avid member of Local First Chicago, Rob believes in assisting sustaining local economies with green collar jobs and belongs to many green orientated groups in Chicago and around the country. more

Are electric car makers missing the trick?

Tuesday 29 March 2011 at 11:12 am Are electric car makers missing the trick?


by Martin Ott

I believe that electric car makers may be driving us all down the road that may result in the same sort of technology failures that we have seen in the past.
I'm not referring to the Sinclair scooter here but cast your mind back to the débâcle of Betamax v VHS home recording systems. The eventual winner was the technically inferior VHS but the battle was not resolved until innumerable consumers had paid out for worthless Betamax systems. Back in the 70's a similar conflict occurred over audio systems when America fell in love with the 8 track tape system that moved magnetic tape in a loop over the player head at a high speed resulting in a better sound. The world market finally dictated that the audio cassette was the way to go but not until millions of consumers had been lumbered with home and in-car systems that went down the technological cul de sac. more

Wind Turbine Manufacturer Acknowledges SGS´s Contribution towards Successful Project Completion

Tuesday 29 March 2011 at 10:57 am by Suresh Varma

The Theni Wind Farm project was developed by CLP India Pvt. Ltd., one of the major wind farm project developers in India. Located in the south western part of Tamilnadu, a southern state of the country, the facility consists of 60 Vestas V82 geared wind turbines. As recognition of its contribution towards the successful execution of this wind power project SGS received Vestas award.

Each turbine at the wind farm has a capacity of 1.65 MW IEC Class IIB machine with a blade diameter of 82 m. After a six-month long completion period, the Theni Wind Farm was officially opened in May, 2010.

Acting as contract engineer during project execution, SGS was responsible for ensuring that all activities were carried out at the site by the contractor in line with the final agreement. In doing so, SGS supervised the quality of construction works, the fulfillment of the technical parameters and kept the project within the scheduled time and contracted price. more

E.ON uses PPC's Broadband Powerline technology in smart grid project

Tuesday 29 March 2011 at 10:37 am E.ON uses PPC's Broadband Powerline technology in smart grid project

by Power Plus Communications

Mannheim - Power Plus Communications AG (PPC), the leading provider of Broadband Powerline Communication systems (BPL) for smart grids has taken on a key role within an E.ON smart grid project to facilitate an extension of Cisco's Connected Grid Solution.

E.ON Westfalen Weser AG is currently trialing smart grid technology within its network of 1.3 million inhabitants and PPC's proven medium voltage BPL solution has connected substations in the project using the existing power grid.

Using BPL technology, standard compliant and IP-based data transfer rates of 5-30 Mbit/s can easily be achieved via the medium voltage cable itself. Within E.ON’s smart grid project, PPC's medium voltage technology facilitated the extension of Cisco's Connected Grid Solution. The Cisco smart grid Router and Switches used in the project are highly compatible with BPL networks, providing a real cost advantage over fiber optic networks – which can be much more expensive where cables are not pre-existing.

By combining their technology at Westfalen Weser, PPC and Cisco have ensured the evolution of fast and efficient smart grids which are controlled on an IP basis. This increases the reliability of the power grid, fulfills regulations and drives down costs. At the same time this modern smart grids communications technology makes it possible to effectively integrate renewable energy into the grid. more

MIT Infrastructure "Life Cycle" Study is Progress Both Left & Right Can Embrace - Part 2, Fiscal Responsibility

Saturday 19 February 2011 at 09:02 am By Brenda Krueger Huffman


Chicago – Perhaps moving to the center is where we all need to be politically on the environment and effective spending compatibility. Not all green technology is crazy, and not all business profit or government expenditure is evil.

Even if you do not believe in man caused climate change, we can all agree leaving a cleaner planet and a more fiscally responsible government for the next generation is preferable to not doing so.

Perhaps green technology can be cost effective, and government fiscal responsibility may realistically include affordable green initiatives. Honest “life cycle analysis” and “life cycle cost analysis” study considerations should be a political compromise starting point both the left and the right can embrace. more

Global warming: Impact of receding snow and ice surprises scientists

Thursday 27 January 2011 at 11:05 am Global warming: Impact of receding snow and ice surprises scientists

By Pete Spotts


Washington - A long-term retreat in snow and ice cover in the Northern Hemisphere is weakening the ability of these seasonal cloaks of white to reflect sunlight back into space and cool global climate, according to a study published this week.

Indeed, over the past 30 years, the cooling effect from this so-called cryosphere – essentially areas covered by snow and ice at least part of the year – appears to have weakened at more than twice the pace projected by global climate models, the research team conducting the work estimates.

The study, which appeared online Sunday in the journal Nature Geoscience, represents a first cut at trying to calculate from direct measurements the impact of climate change on the Northern Hemisphere's cryosphere. The study was conducted by a team of federal and university scientists who examined data gathered between 1979 and 2008. more

EPA presents plan on greenhouse gases

Wednesday 05 January 2011 at 10:38 pm By Mark Clayton


Washington - Setting the stage for a New Year battle royal between Congress and the White House over greenhouse gas emissions, the US Environmental Protection Agency Thursday laid out a timetable for the nation's largest carbon emitters – power plants and refineries – to begin curbing those pollutants.

Republicans have said all year that they plan to pull out all the stops to keep the EPA from phasing in greenhouse gas (GHG) regulations beginning in 2011, saying they would damage the energy industry, raise prices, and cost jobs.

Rep. Fred Upton (R) of Michigan, the incoming chairman of the House Energy and Commerce Committee, has said he opposes the regulations on greenhouse gases and indicated he would lead efforts to revoke EPA regulations in the next Congress. The new regulations, he says, will likely lead to the shut down of coal-fired power plants.

"To protect jobs and fortify our energy security, we should be working to bring more power online, not shutting plants down," Mr. Upton said in a statement. "We are woefully unprepared to meet our nation's growing energy demands, yet this administration's 'none of the above' energy policy will do nothing but cost jobs, make energy more expensive, and increase our dependence on foreign sources of energy."

Environmentalists lauded the EPA's move. more

Supreme Court takes global warming case that targets power companies

Monday 13 December 2010 at 03:21 am By Warren Richey,


Washington - The US Supreme Court on Monday agreed to examine a major environmental lawsuit that seeks to force six electric power companies to cap and reduce their carbon-dioxide emissions to fight global warming.

The lawsuit - filed in 2004 by eight states, the City of New York, and three land trusts - targets what it claims are the largest emitters of carbon dioxide in the United States and among the largest in the world.

It seeks a judicial order declaring that the fossil-fueled power plants are a "public nuisance." It also seeks a judicial order capping the plants' greenhouse gas emissions and requiring the plants to adopt a schedule of reduced emissions in future years. more

Outside Cancun climate conference, Caribbean Sea testifies to global warming

Monday 13 December 2010 at 03:09 am By Ezra Fieser,


Bayahibe, Dominican Republic - This summer's extreme heat may seem like a distant memory as winter approaches the United States.

But the summer that broke heat records across the Northern Hemisphere is still being felt below the surface of the Caribbean Sea: 2010 will likely be one of the most deadly years on record for coral reefs.

If diplomats attending the two-week global climate change talks that opened Monday in Cancun, Mexico, want more evidence of the negative and potentially devastating affects of warming temperatures, they need look no further than the blue sea outside their hotels. Researchers say that throughout the Caribbean coral reefs are "bleaching," a condition that occurs when they are under extreme stress due to warmer-than-normal sea temperatures. more