Dr. Jeff Masters' WunderBlog

Hurricane Ike: top U.S. weather story of 2008
Posted by: Dr. Jeff Masters, 19:09 GMT le 18 février 2009 +3
The top U.S. weather story of 2008 was undoubtedly Hurricane Ike. The National Hurricane Center has released its summary of Ike, and here are some of the highlights:

Ike did $19.3 billion in damage to the U.S.--fourth costliest hurricane on record, behind Katrina, Andrew, and Wilma.

Ike did an additional $4.7 billion in damage after it became extratropical. Hurricane-force wind gusts were reported in Cincinnati, and 2.6 million people lost power in Ohio. The $2.2 billion in damage to Ohio rivaled the 1974 Xenia tornado as that state's costliest natural disaster ever. Ike's remnants also caused Kentucky's most widespread power outage in history (600,000 customers). (However, the 2009 ice storm in Kentucky surpassed this total!)


Figure 1. Ike's tremendous storm surge wiped most of the Bolivar Peninsula north of Galveston clean. Image credit: National Weather Service, Houston/Galveston Office.

Figure 2. Standard 20 foot high utility pole on the Bolivar Peninsula, with debris caught about 18 feet high. The pole stands near the intersection of Highways 87 and 124, near High Island, and is about 2 feet above sea level. The combined action of the storm surge and waves on top of the surge (wave run-up) deposited the debris at the top of this pole. Image credit: Ted Eubanks.

Ike produced a 15-20 foot high storm surge along the east side of Galveston Bay and along the Bolivar Peninsula just to the north of Galveston. This was the second highest storm surge recorded in Texas, behind the 22.1 foot surge of Hurricane Carla in 1961. It is likely that the Great Galveston Hurricane of 1900 and and the 1915 Galveston hurricane had higher storm surges, though, since they were both Category 4 storms. Although Ike was a strong Category 2 hurricane at landfall, its storm surge was characteristic of a strong Category 3 hurricane.

Ike's 10-13 foot storm surge pushed 30 miles inland in Southwest Louisiana, reaching the town of Lake Charles. Isolated areas in Jefferson County, Texas, and Cameron Parish, Louisiana, had surge heights up to 17 ft. Ike's storm surge was 11 feet at Port Arthur, Texas,

Ike killed 20 people in Texas, Louisiana, and Arkansas. Another 34 people from Galveston and the hard-hit Bolivar Peninsula remain missing, according to the Laura Recovery Center, putting Ike's presumed U.S. death toll at 54. This makes Ike the 30th deadliest hurricane in U.S. history. An additional 64 indirect deaths occurred in Texas as a result of electrocution, carbon monoxide poisoning, and pre-existing medical complications. At least 28 direct and indirect deaths were reported in Tennessee, Ohio, Indiana, Illinois, Missouri, Kentucky, Michigan, and Pennsylvania from Ike's remnants. This makes the total death toll from Ike 146, due to direct and indirect deaths, with those people missing presumed dead.

Ike disrupted power to 7.5 million people--the highest ever for a hurricane (Hurricane Frances of 2004 and Hurricane Isabel of 2003 are in second place, with 6 million people affected). The "Superstorm" Blizzard of 1993 (10 million people affected) was the only weather-related disaster to knock out power to more people than Ike in the U.S. Texas and Louisiana had 2.6 million affected, Ohio 2.6 million, and Kentucky 600,000. Power outage figures are difficult to verify and collect, so if anyone has a better list of power outage figures from major weather disasters, I'd like to hear them: jmasters@wunderground.com.

The oil industry was hit hard, with ten offshore rigs destroyed, two large pipelines damaged, and fourteen refineries forced to close. Damage to the Ports of Galveston and Houston, as well as debris in Galveston Bay and the Houston Ship Channel, kept those ports closed after the storm for several days, leaving almost 150 tankers, cargo vessels, and container ships waiting offshore.

Ike damaged Galveston's 14-17 foot high protective sea wall, exposing wooden pilings that support its older sections. The storm also washed away the 70-foot wide beach that helped protect the seawall. As a result, the U.S. Army Corps of Engineers is undertaking the seawall's first major repair job in its 105-year history. About $10 million will be spent repairing the seawall, and an additional $10 million will be spent dumping 400,000 cubic yards of sand to replenish the lost beach.

Outside the U.S.
Cuba suffered $3-$4 billion in damage, and 2.6 million people were forced to evacuate (23% of the population).

The Southeast Bahamas suffered $50-200 million in damage. Additional heavy damage occurred on the nearby Turks and Caicos Islands.

Haiti probably suffered the most from Ike, with 74 deaths and ruinous flooding.

Jeff Masters
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Reader Comments
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501. stillwaiting 16:43 GMT le 22 février 2009    
just a wind shift in the extreme western gulf!!!!No surface low over water, maybe near the end of april!!!!
Member Since: 5 octobre 2007 Posts: 20 Comments: 4970
502. Orcasystems 16:46 GMT le 22 février 2009    
Complete Blog Refresh
Mirror Site
New Section includes Mt Redoubt



I am also trying something new with these link
Display Current
Member Since: 1 octobre 2007 Posts: 77 Comments: 26077
503. KEHCharleston 16:50 GMT le 22 février 2009    
Quoting Orcasystems:


ROFLMAO, your new Avatar??

Hmmm.. I will think on that one.
I was thinking more of a heads up that my post is just a stirring.
That way those who do not wish to step into the ummm... waters - can just pass on by.

I suppose I could have two avatars - one for stir stick posts and one for all else.
Member Since: 19 août 2008 Posts: 6 Comments: 2490
504. Orcasystems 16:57 GMT le 22 février 2009    
Quoting KEHCharleston:

Hmmm.. I will think on that one.
I was thinking more of a heads up that my post is just a stirring.
That way those who do not wish to step into the ummm... waters - can just pass on by.

I suppose I could have two avatars - one for stir stick posts and one for all else.


Hmmm how about a moonlit palm tree.. held up by a stick?
Member Since: 1 octobre 2007 Posts: 77 Comments: 26077
505. Orcasystems 17:04 GMT le 22 février 2009    
Member Since: 1 octobre 2007 Posts: 77 Comments: 26077
506. KEHCharleston 17:09 GMT le 22 février 2009    
Quoting Orcasystems:


Hmmm how about a moonlit palm tree.. held up by a stick?

I'll get out the GIMP (GNU Image Manipulation Program - it's free!) and give it a try. :).
Can I use that stick in post 505?
Chores first though.
Member Since: 19 août 2008 Posts: 6 Comments: 2490
507. Orcasystems 17:19 GMT le 22 février 2009    
Quoting KEHCharleston:

I'll get out the GIMP (GNU Image Manipulation Program - it's free!) and give it a try. :).
Can I use that stick in post 505?
Chores first though.


I changed it so it links to the original.
If you need any help.. I use firefox and can make almost anything.
Member Since: 1 octobre 2007 Posts: 77 Comments: 26077
508. futuremet 18:02 GMT le 22 février 2009    
Quoting TampaSpin:


Simply put it weakens falls apart while moving West SouthWest....lol


lol...A little detail doesn't hurt
Member Since: 19 juillet 2008 Posts: 43 Comments: 4049
509. hahaguy 18:10 GMT le 22 février 2009    
Hey everybody another nice day here in port st lucie lol
Member Since: 12 août 2007 Posts: 2 Comments: 2838
510. CybrTeddy 18:12 GMT le 22 février 2009    
98 Days till Hurricane season too.
Member Since: 8 juillet 2005 Posts: 253 Comments: 20259
511. HTV 19:26 GMT le 22 février 2009    
Did anyone notice on Doc's blog on the photo, Fig. 1 the one house still standing just above the causeway? That house was recently built and engineered for Cat. 4 storm. Most everything else around there was built in the 60's and 70's, basically on utility poles sunk in the sand.
512. SevereHurricane 19:31 GMT le 22 février 2009    
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
513. Stlouiskid 20:14 GMT le 22 février 2009    
Thanks guys for all of your feedback, i will consider each suggestion carefully
Member Since: 15 août 2008 Posts: 0 Comments: 20
514. HadesGodWyvern 20:27 GMT le 22 février 2009    
Mauritius Meteorological Services
Tropical Cyclone Warning Number SEVEN
FORTE TEMPETE TROPICALE HINA (09-20082009)
22:00 PM Réunion February 22 2009
====================================

At 18:00 PM UTC, Severe Tropical Storm Hina (980 hPa) located at 17.6S 78.7E has 10 minute sustained winds of 55 knots with gusts of 80 knots. The storm is reported as moving south-southeast at 9 knots.

Dvorak Intensity: T4.0

Storm-Force Winds
================
20NM from the center

Gale-Force Winds
================
40 NM radius of the center, extending up to 80 NM in the southwestern quadrant

Near-Gale Force Winds
======================
70 NM radius of the center, extending up to 160 NM in the southern sector

Forecast and Intensity
========================
12 HRS: 18.3S 78.4E - 55 knots (Forte Tempête Tropicale)
24 HRS: 18.7S 77.4E - 50 knots (Forte Tempête Tropicale)
48 HRS: 20.0S 75.0E - 40 knots (Tempête Tropicale Modereé)
72 HRS: 21.7S 71.9E - 35 knots (Tempête Tropicale Modereé)

Additional Information
===========================
Severe Tropical Storm Hina is under the upper level ridge that allows low wind shear. Upper level divergence is rather good: Excellent over the southern part of Hina due to an upper level trough located to the southwest but more limited over the northern sector. At low levels inflows are established. However, northeasterly wind shear should increase a little bit within the next 12 hours and maintain for the whole forecast period. Under the persistency influence of shear and the arrival over area of lower oceanic heat contain at the end of the forecast period, some slow weakening is forecast after tomorrow. Steering flow seems to be mid-level ridge located to the east of Hina. Consequently, track is toward the south, then this ridge should extend to the southwest of the system to give a more southwestward component to the track. This forecast is based on the consensus of all available NWP models.
Member Since: 24 mai 2006 Posts: 43 Comments: 36687
515. hahaguy 20:33 GMT le 22 février 2009    
Idk if this is real or not but last year i heard that the NHC was going to change their storm update times to 3 and 8 or something like that.
Member Since: 12 août 2007 Posts: 2 Comments: 2838
516. Cotillion 21:54 GMT le 22 février 2009    
I see Miss Fay Ledger may get an Oscar tonight for her acclaimed performance in 'Drenching Florida'.

Her next film - of which her fan club, paradoxically, wishes not to be a blockbuster in any way, shape or form - is mooted to come out in 2014...

Member Since: 23 août 2008 Posts: 7 Comments: 5300
517. SevereHurricane 22:04 GMT le 22 février 2009    
This is some awsome Hurricane Footage, at one point it looks like its out of the scene of a horror movie!

Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
518. all4hurricanes 22:17 GMT le 22 février 2009    
Severe H that is an impressive video
Member Since: 29 Mars 2008 Posts: 0 Comments: 2192
519. futuremet 22:46 GMT le 22 février 2009    
I wonder what 2009 hurricane season has in store for us.
Member Since: 19 juillet 2008 Posts: 43 Comments: 4049
520. Cotillion 22:49 GMT le 22 février 2009    
Quoting futuremet:
I wonder what 2009 hurricane season has in store for us.


The usual I'd guess.

Flashlight batteries, tinned foods, first aid kits...

And any other vital equipment one needs to have in store before June 1st. ;)
Member Since: 23 août 2008 Posts: 7 Comments: 5300
521. GeoffreyWPB 22:59 GMT le 22 février 2009    
I was thinking of getting a whole home generator for this season. Anyone know of any good deals or companies around? I live in West Palm.
Member Since: 10 septembre 2007 Posts: 0 Comments: 9127
522. futuremet 23:19 GMT le 22 février 2009    
HadesGodWyvern

Are you a met?
Member Since: 19 juillet 2008 Posts: 43 Comments: 4049
523. KEHCharleston 23:33 GMT le 22 février 2009    
517. SevereHurricane

Chilling - 20 years ago this year
Member Since: 19 août 2008 Posts: 6 Comments: 2490
524. all4hurricanes 23:37 GMT le 22 février 2009    
519
hurricanes, I can tell you that
Member Since: 29 Mars 2008 Posts: 0 Comments: 2192
525. melwerle 23:53 GMT le 22 février 2009    
After seeing the footage of Hurricane Hugo, I REALLY hope we can get out of here before the next hurricane season hits. I don't ever want to deal with something like that!
Member Since: 28 juin 2006 Posts: 12 Comments: 1837
526. SevereHurricane 23:55 GMT le 22 février 2009    
Quoting KEHCharleston:
517. SevereHurricane

Chilling - 20 years ago this year


hmmm...

Just for that reason im going to stick my neck out and say the Carolias will see a major impact this season...
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
527. SevereHurricane 00:04 GMT le 23 février 2009    
Copy and paste this URL and watch this Video of Hurricaane Katrina in Waveland MS. Probally some of the best footage from that hurricane and you can get a good idea of how quick the water came up and how bad the winds were.

Make Sure you skip a little in the video when they put the camera down infront of the jars.

http://video.google.com/videoplay?docid=-6352182742464083092&ei=vOihSbPxG4LorgLj7OSmBw&q=hurricane katrina waveland &dur=3
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
528. HTV 00:05 GMT le 23 février 2009    
Quoting GeoffreyWPB:
I was thinking of getting a whole home generator for this season. Anyone know of any good deals or companies around? I live in West Palm.

I stock and sell Generac Guardian units, but I'm in Texas. I would be more than happy to answer any questions you or anyone else might have about standbys. It's not as simple of an installation as some dealers lead you to believe. Generac sells units in a package including a transfer and a circuit box, but have found it to only fit the need about 25% of the time. I recommend having an electrician come out to survey your service entrance prior to buying your unit. Now is the time to buy and install, not when there is a storm lurking.
529. Skyepony (Mod) 00:14 GMT le 23 février 2009    
Warner says Vlad Mazur, a scientist with the National Severe Storms Laboratory in Norman, Okla., was the first to study storms using a 1,000-image-per-second camera in the early 1990s. Warner adds that it has been only in the past three or four years that technology has enabled him and other scientists to use high-speed video to study lightning, when "the speed and therefore the resolution increased significantly to allow for meaningful resolutions to be captured at speeds above 5,000 images per second."

Lightning is, well, "lightning fast." According to the National Center for Atmospheric Research in Boulder, Colo., a lightning bolt's downward leader (the initial discharge) speeds toward its target at 136,000 mph, while the luminous return stroke into the clouds moves at 62 million mph. These strokes are so fast that the human eye sees just a single flickering lightning bolt.

The high-speed cameras can show the previously unseen structure of the first part of lightning bolts, the forked "stepped leaders" that move toward the ground in a series of jumps and then spark the more visible return stroke. All of this occurs in less than half a second.

The research does have relevance for practical applications. Says Warner, "It's crucial that we make better models based on actual data and observations, such as from high-speed videos, rather than models based on theory." Better models would make for improved lightning protection, he says.

Lightning is one of the USA's deadliest weather phenomena. In a typical year it kills more than 60 people, according to the National Weather Service. Based on a 30-year average of data from 1978 to 2007, that is more people than are killed each year by either tornadoes or hurricanes.

Eventually, Warner hopes to use video cameras that can capture 100,000 images a second.

Scientists say we're only at the beginning of studying lightning with such cameras. In a 2008 paper in Geophysical Research Letters, lead author Marcelo Saba of the National Institute for Space Research in Brazil noted that high-speed video observations will be crucial in building on scientific understanding of cloud-to-ground lightning flashes.

Member Since: 10 août 2005 Posts: 144 Comments: 29346
530. rainmound 00:18 GMT le 23 février 2009    
Quoting Stlouiskid:
Hey guys. On Monday i have to present a research topic to my English teacher. The set back is, that it must be a persuasive research paper. I would really like to do something regarding weather/hurricanes. If you have any suggestions it is gladly appreciated. Consider it a friendly request.

Thank You, Matt (Stlkid)


If it has to be persuasive that means you have to do research to convince people of something. I would just do a paper about whether or not you think global warming is real, and do research to back up why.
Member Since: 18 avril 2006 Posts: 0 Comments: 42
531. SevereHurricane 00:21 GMT le 23 février 2009    
Quoting Skyepony:
Warner says Vlad Mazur, a scientist with the National Severe Storms Laboratory in Norman, Okla., was the first to study storms using a 1,000-image-per-second camera in the early 1990s. Warner adds that it has been only in the past three or four years that technology has enabled him and other scientists to use high-speed video to study lightning, when "the speed and therefore the resolution increased significantly to allow for meaningful resolutions to be captured at speeds above 5,000 images per second."

Lightning is, well, "lightning fast." According to the National Center for Atmospheric Research in Boulder, Colo., a lightning bolt's downward leader (the initial discharge) speeds toward its target at 136,000 mph, while the luminous return stroke into the clouds moves at 62 million mph. These strokes are so fast that the human eye sees just a single flickering lightning bolt.

The high-speed cameras can show the previously unseen structure of the first part of lightning bolts, the forked "stepped leaders" that move toward the ground in a series of jumps and then spark the more visible return stroke. All of this occurs in less than half a second.

The research does have relevance for practical applications. Says Warner, "It's crucial that we make better models based on actual data and observations, such as from high-speed videos, rather than models based on theory." Better models would make for improved lightning protection, he says.

Lightning is one of the USA's deadliest weather phenomena. In a typical year it kills more than 60 people, according to the National Weather Service. Based on a 30-year average of data from 1978 to 2007, that is more people than are killed each year by either tornadoes or hurricanes.

Eventually, Warner hopes to use video cameras that can capture 100,000 images a second.

Scientists say we're only at the beginning of studying lightning with such cameras. In a 2008 paper in Geophysical Research Letters, lead author Marcelo Saba of the National Institute for Space Research in Brazil noted that high-speed video observations will be crucial in building on scientific understanding of cloud-to-ground lightning flashes.



Thank You It was very intresting...
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
532. GeoffreyWPB 00:25 GMT le 23 février 2009    
Thank you HTV...I tried buying one after Frances and Jeanne, but it was such a hassle. Buy the unit itself...gas company hook up extra, etc. I just saw what my neighbors went through and wanted to help with housing, ice, etc. An elderly lady passed away in my complex because of no electricity and the heat.
Member Since: 10 septembre 2007 Posts: 0 Comments: 9127
533. beell 00:28 GMT le 23 février 2009    
Before Doc M puts away this Ike blog and we prepare for the next season-Another up-close and personal look at Bolivar from hawkeyemedia

A small learning curve with this link but not too hard.
Member Since: 11 septembre 2007 Posts: 125 Comments: 12884
534. KEEPEROFTHEGATE (Mod) 00:35 GMT le 23 février 2009    
Quoting all4hurricanes:
519
hurricanes, I can tell you that
and quite a few at that
Member Since: 15 juillet 2006 Posts: 143 Comments: 40597
535. KEHCharleston 00:39 GMT le 23 février 2009    
Quoting SevereHurricane:


hmmm...

Just for that reason im going to stick my neck out and say the Carolias will see a major impact this season...

Hush your mouth!
I have been trying to compare El Nino/Neutral/La Nina with South Carolina Hurricanes. Unfortunately, I am getting conflicting information regarding which prevailed in any particular year. Any suggestions?
Member Since: 19 août 2008 Posts: 6 Comments: 2490
536. MissNadia 00:41 GMT le 23 février 2009    
535
Hi
Press is the man with the necessary connections on this one!!!! LOL
Member Since: 27 juillet 2008 Posts: 0 Comments: 2674
537. Hierge 00:46 GMT le 23 février 2009    

Arctic Sea Ice Underestimated for Weeks Due to Faulty Sensor

By Alex Morales

Feb. 20 (Bloomberg) -- A glitch in satellite sensors caused scientists to underestimate the extent of Arctic sea ice by 500,000 square kilometers (193,000 square miles), a California- size area, the U.S. National Snow and Ice Data Center said.

The error, due to a problem called “sensor drift,” began in early January and caused a slowly growing underestimation of sea ice extent until mid-February. That’s when “puzzled readers” alerted the NSIDC about data showing ice-covered areas as stretches of open ocean, the Boulder, Colorado-based group said on its Web site.

“Sensor drift, although infrequent, does occasionally occur and it is one of the things that we account for during quality- control measures prior to archiving the data,” the center said. “Although we believe that data prior to early January are reliable, we will conduct a full quality check.’’

The extent of Arctic sea ice is seen as a key measure of how rising temperatures are affecting the Earth. The cap retreated in 2007 to its lowest extent ever and last year posted its second- lowest annual minimum at the end of the yearly melt season. The recent error doesn’t change findings that Arctic ice is retreating, the NSIDC said.

The center said real-time data on sea ice is always less reliable than archived numbers because full checks haven’t yet been carried out. Historical data is checked across other sources, it said.

The NSIDC uses Department of Defense satellites to obtain its Arctic sea ice data rather than more accurate National Aeronautics and Space Administration equipment. That’s because the defense satellites have a longer period of historical data, enabling scientists to draw conclusions about long-term ice melt, the center said.

“There is a balance between being as accurate as possible at any given moment and being as consistent as possible through long time-periods,” NSIDC said. “Our main scientific focus is on the long-term changes in Arctic sea ice.”

538. GeoffreyWPB 00:50 GMT le 23 février 2009    
Bubbles of warming, beneath the ice
As permafrost thaws in the Arctic, huge pockets of methane -- a potent greenhouse gas -- could be released into the atmosphere. Experts are only beginning to understand how disastrous that could be.
By Margot Roosevelt

February 22, 2009

Reporting from Bering Land Bridge National Preserve, Alaska -- Four miles south of the Arctic Circle, the morning sky is streaked with apricot. Frozen rivers split the tundra of the Seward Peninsula, coiling into vast lakes. And on a silent, wind-whipped pond, a lone figure, sweating and panting, shovels snow off the ice.

The young woman with curly reddish hair stops, scribbles data, snaps a photo, grabs a heavy metal pick and stabs at white orbs in the thick black ice.

"Every time I see bubbles, I have the same feeling," says Katey Walter, a University of Alaska researcher. "They are amazing and beautiful."

Beautiful, yes. But ominous. When her pick breaks through the surface, the orbs burst with a low gurgle, spewing methane, a potent greenhouse gas that could accelerate the pace of climate change across the globe.

International experts are alarmed. "Methane release due to thawing permafrost in the Arctic is a global warming wild card," warned a report by the United Nations Environment Program last year. Large amounts entering the atmosphere, it concluded, could lead to "abrupt changes in the climate that would likely be irreversible."

Methane (CH4) has at least 20 times the heat-trapping effect of an equivalent amount of carbon dioxide (CO2). As warmer air thaws Arctic soils, as much as 55 billion tons of methane could be released from beneath Siberian lakes alone, according to Walter’s research. That would amount to 10 times the amount currently in the atmosphere.

At 32, Walter, an aquatic ecologist, is a rising star among the thousands of scientists who are struggling to map, measure and predict climate change. Parts of her doctoral dissertation on Siberian lakes were published in three prestigious journals in 2007: Science, Nature and Philosophical Transactions of the Royal Society.

According to one of her studies, methane emissions from Arctic lakes were a major contributor to a period of global warming more than 11,000 years ago.

"It happened on a large scale in the past, and it could happen on a large scale in the future," says Walter, who refers to potential methane emissions as "a time bomb."

Methane levels in the atmosphere have tripled since preindustrial times. Human activities, including rice cultivation, cattle raising and coal mining, account for about 70% of releases, according to recent studies. Natural sources, like tropical wetlands and termites, make up the rest. But those estimates had not incorporated the bubbles Walter was probing on an autumn morning on the Seward Peninsula.

That gurgling gas could change the entire model for predicting global warming. And lakes are not the only methane source: Newly discovered seeps -- places where methane leaks to the surface -- from the shallow waters of Siberia's vast continental shelf are also likely to upset previous assumptions.

Walter's work "has gotten a lot of attention," said John E. Walsh, chief scientist of the International Arctic Research Center in Fairbanks. "She found direct evidence of methane releases in high-latitude lakes. That was not fully realized before."

In a field where the science often seems opaque, Walter's research has a flashy side. She enjoys igniting methane seeps with a cigarette lighter, leaping away as the gas flares as high as 20 feet.

"It's fun," she says. "And it is informative."

Videos of the stunts have swept through the Internet, rare visual evidence of possible danger ahead. At a recent Senate hearing, Al Gore played a clip of her lighting a methane seep. The BBC, the Discovery Channel and the History Channel have featured her in documentaries.

But the complex science of Arctic methane is only beginning to be understood. In the desolate wilderness of the Bering Land Bridge National Preserve, a sense of urgency is palpable among Walter and three fellow researchers, hunkered down in neon-orange tents.

An occasional helicopter ferries supplies from Nome, the closest town, soaring over scattered herds of caribou. A red fox scampers through the brush. Across a snowfield, bear tracks recede into the distance, a reminder that field science isn't for sissies.

"Can you shoot a gun?" Walter asks a visitor, as she heads out to one of 20 lakes she is surveying. When the answer is noncommittal, she hands over bear spray and instructs: "Don't use it until the bear is right up close, facing you."

Nowhere is the evidence of a heating planet more dramatic than in the polar regions. Over the last 50 years, the Arctic has warmed twice as fast as the rest of the globe. Last summer, for the first time in recorded history, the North Pole could be circumnavigated. Ice sheets on Greenland and West Antarctica are melting rapidly. Polar bears and emperor penguins are threatened with extinction.

Even as glaciers and sea ice have captured the most headlines, growing concern is now focused on the transformation of permafrost, soils that are frozen year-round.

Today, 20% of Earth's land surface is locked up in a deep freeze. But scientists predict that air temperature in the Arctic is likely to rise as much as 6 degrees Celsius, or 10.8 degrees Fahrenheit, by the end of the century. That is expected to boost the emission of carbon compounds from soils.

The upper 3 meters -- about 10 feet -- of permafrost stores 1.9 trillion tons of carbon, more than double the amount in the atmosphere today, according to a recent study in the journal Bioscience.

"We are seeing thawing down to 5 meters," says geophysicist Vladimir Romanovsky of the University of Alaska. "A third to a half of permafrost is already within a degree to a degree and a half [Celsius] of thawing."

If only 1% of permafrost carbon were to be released each year, that could double the globe's annual carbon emissions, Romanovsky notes. "We are at a tipping point for positive feedback," he warns, referring to a process in which warming spurs emissions, which in turn generate more heat, in an uncontrollable cycle.

Walter's work is crucial, according to Romanovsky and others, because global warming hinges partly on the ratio of how much carbon is released as CO2 versus how much as methane, a molecule that contains both carbon and hydrogen. Methane, although a far more potent greenhouse gas than carbon dioxide, breaks down more quickly. But when it does, it oxidizes into a carbon dioxide molecule, which can last more than a century in the atmosphere.

Out on the lake, Walter explains: When organic matter (dead plants and animals) rots in the ground, it gives off carbon dioxide. Much of the organic material of thawed permafrost is expected to release carbon dioxide.

But as ice inside permafrost melts, small sinkholes open in the ground and fill with water, joining together to form millions of ponds and lakes. Organic matter slips from eroding shorelines to lake bottoms, where microbes feed on it. Because lake bottoms are oxygen-free, the microbes generate methane in addition to carbon dioxide -- as in the burping La Brea tar pits.

"These lakes are getting bigger -- in some places by a meter a year," Walter says, scooping out slush from the hole she has punched through 6 inches of ice. Into the seep, she inserts a plastic umbrella-like contraption fitted with a bottle to collect gas and a suspended brick to hold it straight.

Before Walter perfected the methane trap, when she was a graduate student in Siberia, she would swim in near-freezing water, dodging leeches and muskrats. Once she caught pneumonia. Another time, her hair caught on fire as she ignited a methane seep.

On the Seward Peninsula trip, she hikes up to 8 miles a day from lake to lake through snowdrifts. Her hip is black and blue from a fall through the ice. "Methane is hard work," she says with a smile.

At each seep, Walter places a small red flag so her colleagues can find the bubbles. Lawrence Plug, a geophysicist from Dalhousie University in Halifax, Canada; Guido Grosse, a German geologist; and Benjamin M. Jones, a U.S. Geological Survey researcher, help shovel off the ice in straight-line paths, take notes on the size of each bubble group, record the location with global positioning system devices, and measure the depth of the lakes.

In the evening, in a cramped cook tent, jars of peanut butter and Nutella sit amid satellite data maps and a textbook on "Applied Linear Statistical Models." Frosted hats and mittens drip from a clothesline. Jones cooks up a batch of hamburger as Walter labels methane bottles with a marker and enters data into her laptop.

Over the next two years, the researchers, funded by the National Science Foundation and NASA, will move between Siberia and Alaska. They will drill permafrost cores, map seeps and analyze data to produce a model of how methane from Arctic lakes might affect Earth's future climate.

"By figuring out how quickly permafrost thawed in the past, we can test our models to predict how fast it could thaw in the next 100 years," says Plug, who will make the complex calculations. "If the temperature warms a couple of degrees Celsius, the lakes could expand at two or three times their current rate."

Elsewhere, scientists cast a wary eye toward clouds of methane bubbles roiling the waters of the Siberian continental shelf. Those emissions, possibly from subsurface permafrost, are even harder to measure than lake emissions.

Meanwhile, researchers are debating the possibility of eventual seeps from methane hydrates -- icy formations beneath the continental shelves and the ocean bottom, and far below land-based permafrost.

Walsh, at the International Arctic Research Center, emphasizes the "huge range of uncertainty" as to how much climate change methane emissions could trigger. "The potential is there for large releases. But there is also a risk of alarmism."

To many Alaskans, it is hardly news that permafrost is thawing: Across the state, houses have been collapsing and trees tipping over. Researchers estimate that repairing affected schools, roads and bridges will cost up to $6 billion over the next two decades.

But the global implications have yet to sink in.

Out on the wild frontier of climate research, far from the legislatures and the diplomatic gatherings where climate policy is debated, Katey Walter and her colleagues focus on what they call "ground truthing."

And beyond that laborious data-gathering, Walter has a mission: to spread the word about what is happening. At the beginning of her field trip, she stops in Nome and leads a group of fifth-graders, many from Alaska Native tribes, out to poke holes in the ice of a nearby lake and light methane flares.

She talks to them about people who live in faraway cities, driving automobiles and working in industries that emit carbon dioxide. And how that causes warming that is felt in the Arctic. And why, even though there are so few people in Alaska, the ice around them is melting.
"That's what we're studying," she explains. "It's all related."

Member Since: 10 septembre 2007 Posts: 0 Comments: 9127
539. SevereHurricane 00:52 GMT le 23 février 2009    
Quoting KEHCharleston:

Hush your mouth!
I have been trying to compare El Nino/Neutral/La Nina with South Carolina Hurricanes. Unfortunately, I am getting conflicting information regarding which prevailed in any particular year. Any suggestions?


Well on El Nino years you typically see a weaker Bernuda High which means you will be more likley to be hit by a Cape Verde Hurricane on an El Nino years.

Just a question pondering through my head...

When was the last time The Georgia Coast was directly striked by a Significant Hurricane?

It seems like Georgia's coast is immune to a Major Strike but they had to have been hit before Badly, I mean I know nobodys coast is safe...
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
540. hahaguy 00:57 GMT le 23 février 2009    
Quoting SevereHurricane:


Well on El Nino years you typically see a weaker Bernuda High which means you will be more likley to be hit by a Cape Verde Hurricane on an El Nino years.

Just a question pondering through my head...

When was the last time The Geogia Coast was directly striked by a Significant Hurricane?


I wanna say 1898 but i'm probably wrong
Member Since: 12 août 2007 Posts: 2 Comments: 2838
541. presslord 00:57 GMT le 23 février 2009    
KEH and Nadia....actually, this is a question I bet Stormjunkie can answer....
Member Since: 13 août 2007 Posts: 0 Comments: 10377
542. hydrus 00:58 GMT le 23 février 2009    
Quoting hahaguy:


I wanna say 1898 but i'm probably wrong
Maybe David in 1979.It was only a cat 1.
Member Since: 27 septembre 2007 Posts: 1 Comments: 14305
543. presslord 00:59 GMT le 23 février 2009    
Sever....when I was at UGA (77-81) I had a room mate from Savannah....and I remember a hurricane hit Savannah during that time...tho I don't think it did a lot of damage...I just remember him being concerned, calling home, etc...I don't recall the name of the 'cane....
Member Since: 13 août 2007 Posts: 0 Comments: 10377
544. presslord 00:59 GMT le 23 février 2009    
hydrus...BINGO! That was it....
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545. hydrus 01:03 GMT le 23 février 2009    
I remember it well,I was in Florida when it came ashore on the east coast.It was a cat 5 when it struck the island of Hispanola.
Member Since: 27 septembre 2007 Posts: 1 Comments: 14305
546. hydrus 01:07 GMT le 23 février 2009    
Quoting presslord:
Sever....when I was at UGA (77-81) I had a room mate from Savannah....and I remember a hurricane hit Savannah during that time...tho I don't think it did a lot of damage...I just remember him being concerned, calling home, etc...I don't recall the name of the 'cane....
I like savannah alot,We were working for the Navy in those days,what a blast.
Member Since: 27 septembre 2007 Posts: 1 Comments: 14305
547. SevereHurricane 01:08 GMT le 23 février 2009    
Quoting hahaguy:


I wanna say 1898 but i'm probably wrong


I found 1!
You were close hahaguy,

"In 1893, a severe storm killed two thousand people near Savannah and Hilton Head Island. It seems favorable storm tracks may have spared Georgia in recent decades." from geocities.com

But dang Georgia has not been hit directly by a Major Hurricane in about 116 years!!!!!
Member Since: 7 septembre 2008 Posts: 17 Comments: 1604
548. hahaguy 01:08 GMT le 23 février 2009    
I thought SevereHurricane meant a major hurricane woops lol
Member Since: 12 août 2007 Posts: 2 Comments: 2838
549. KEHCharleston 01:08 GMT le 23 février 2009    
Quoting SevereHurricane:


Well on El Nino years you typically see a weaker Bernuda High which means you will be more likley to be hit by a Cape Verde Hurricane on an El Nino years.

Just a question pondering through my head...

When was the last time The Geogia Coast was directly striked by a Significant Hurricane?
From NOAA Revisits Historic Hurricanes
Georgia major hurricanes: During the 20th Century, Georgia did not have even a single major hurricane make a landfall along its coast. However, such absence did not continue back to the 19th Century. In contrast, Georgia experienced three major hurricanes in the later half of the 19th Century: a Category 3 in 1854 near Savannah, the Category 3 "Sea Islands Hurricane" in 1893 that killed 1000-2000 people near Savannah and a Category 4 in 1898 near Brunswick. Knowledge that such strong hurricanes have impacted this portion of the coast (and will undoubtedly hit again) is important for residents of Georgia to plan for the future.(See new NOAA Technical Memorandum by Sandrik and Landsea(2003).
Member Since: 19 août 2008 Posts: 6 Comments: 2490
550. presslord 01:09 GMT le 23 février 2009    
I'm partial to Charleston....except ya can't beat the party in Savannah on St. Patrick's Day...
Member Since: 13 août 2007 Posts: 0 Comments: 10377
551. hydrus 01:14 GMT le 23 février 2009    
I remember tracking Hugo into that area in 89.What a monster storm that was.
Member Since: 27 septembre 2007 Posts: 1 Comments: 14305

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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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