Record warmth at the top of the Greenland Ice Sheet

By: Dr. Jeff Masters , 9:25 PM GMT on July 18, 2012

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The coldest place in Greenland, and often the entire Northern Hemisphere, is commonly the Summit Station. Located at the top of the Greenland Ice Sheet, 10,551 feet (3216 meters) above sea level, and 415 miles (670 km) north of the Arctic Circle, Summit rarely sees temperatures that rise above the freezing mark. In the 12-year span 2000 - 2011, Summit temperatures rose above freezing only four times, according to weather records researcher Maximiliano Herrera. But remarkably, over the past week, temperatures at Summit have eclipsed the freezing mark on five days, including four days in a row from July 11 - 14. There are actually three weather stations located at the location--Summit, Summit-US, and Summit AWS. The highest reliable temperature measured at any of the three stations is now the 3.6°C (38.5°F) measured on Monday, July 16, 2012 at Summit-US. A 4.4°C reading at Summit in May, 2010 is bogus, as can be seen by looking at the adjacent station. Similarly, a 3.3°C reading from June 2004 is also bad. Records at Summit began in 1987.


Video 1. A 20-ton tractor attempting to repair a bridge washed out by the raging Watson River on July 11, 2012 in Kangerlussauaq, Greenland gets washed downstream. The driver escaped unharmed. Image taken from an article, Warm air over the ice sheet provides great drama in Greenland, at the Danish Meteorological Institute's web site.

Record heat leads to major flooding in Greenland
The record heat has triggered significant melting of Greenland's Ice Sheet. According to the Arctic Sea Ice Blog, on July 11, glacier melt water from the Russell Glacier flooded the Watson River, smashing two bridges connecting the north and south of Kangerlussuaq (Sønder Strømfjord), a small settlement in southwestern Greenland. The flow rate of 3.5 million liters/sec was almost double the previous record flow rate. The latest forecast for Summit calls for cooler conditions over the coming week, with no more above-freezing temperatures at Summit.

Another huge iceberg calves off of Greenland's Petermann Glacier
A massive ice island two times the size of Manhattan and half as thick as the Empire State Building calved off of Greenland's Petermann Glacier on Monday, July 16, 2012. According to Andreas Muenchow, associate professor of physical ocean science and engineering at the University of Delaware's College of Earth, Ocean, and Environment in his Icy Seas blog, the break-off point has been visible for at least 8 years in satellite imagery, and has been propagating at 1 km/year towards Nares Strait. The same glacier calved an iceberg twice as big back on August 4, 2010--the largest iceberg observed in the Arctic since 1962. The freshwater stored in that ice island could have kept the Delaware or Hudson rivers flowing for more than two years, or kept all U.S. public tap water flowing for 120 days. “While the size is not as spectacular as it was in 2010, the fact that it follows so closely to the 2010 event brings the glacier’s terminus to a location where it has not been for at least 150 years,” Muenchow said in a university press release. “Northwest Greenland and northeast Canada are warming more than five times faster than the rest of the world, but the observed warming is not proof that the diminishing ice shelf is caused by this, because air temperatures have little effect on this glacier; ocean temperatures do, and our ocean temperature time series are only five to eight years long — too short to establish a robust warming signal.”


Figure 1. The calving of a massive 46 square-mile iceberg two times the size of Manhattan from Greenland's Petermann Glacier on July 14 - 18, 2012, as seen using MODIS satellite imagery. Image credit: NASA.


Figure 2. Look familiar? Two years ago, a 100 square-mile ice island broke off the Petermann Glacier. It was the largest iceberg in the Arctic since 1962. Image taken by NASA's Aqua satellite on August 21, 2010. Image credit: NASA. I've constructed a 7-frame satellite animation available here that shows the calving and break-up of the Petermann Glacier ice island. The animation begins on August 5, 2010, and ends on September 21, with images spaced about 8 days apart. The images were taken by NASA's Aqua and Terra satellites.

Related posts

Unprecedented May heat in Greenland; update on 2011 Greenland ice melt

Greenland update for 2010: record melting and a massive calving event

Jeff Masters

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Good soaking rains deep in Dixie tonight.

Patrap's WunderBlog
Satisfaction Guaranteed
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Quoting spbloom:


Just FY, Antarctica is far from steady state. The ice on the Peninsula is going fast, and West Antarctica is starting to follow suit. Even East Antarctica is starting to lose a little around the edges (although it's not losing mass overall due to increased snow accumulation inland).

In addition, it's clear that what happens in the north is quickly reflected in the south.

The big question, and it remains open, is how fast all of this can happen, although based on present science it seems unlikely that the Greenland and West Antarctic ice sheets can melt on a scale of decades.

There's a blog for following all of this, although the emphasis is on the north.
..i read not too long ago that the ice layers in Antarctica is 2 miles thick, that wont go anywhere fast
Member Since: August 6, 2011 Posts: 4 Comments: 42045
I want a good dmax for the lesser antilles wave ^^!!
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Member Since: March 16, 2012 Posts: 127 Comments: 7972
.........................good to see the rains in Georgia,hope they get to the drought area's
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Quoting Levi32:


Well according to the last month of precipitation anomalies, the ITCZ is actually slightly farther north than normal in the eastern Atlantic and western Africa. Tropical waves probably seem to be struggling because it is not yet the time of year for them to thrive. In July they almost always fail to become much, and the SAL will always be strong during the downward phase of the MJO over the Atlantic basin.

Additionally, tropical waves becoming separated from the ITCZ is usually a sign of strength and enough amplification to break off from the equatorial trough. Although this can expose them to more dry air entrainment, it usually means they were healthy waves to begin with.

TRMM 30-day rainfall anomalies:



LESSER ANTILLES EXPERIENCING SEVERE DROUGH
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Quoting PlazaRed:

You got to be real brutal about this.
What goes on down there is not of concern to us at the moment as they have not got a Greenland down there to stock up on ice. The do have a steady state Antarctica of course.
The main factor will be the melting of the ice sheet that covers the North pole regions, this will instigate climatic changes that will devastate many national economies and lead to "Global Stress," for want of a better term.


Just FY, Antarctica is far from steady state. The ice on the Peninsula is going fast, and West Antarctica is starting to follow suit. Even East Antarctica is starting to lose a little around the edges (although it's not losing mass overall due to increased snow accumulation inland).

In addition, it's clear that what happens in the north is quickly reflected in the south.

The big question, and it remains open, is how fast all of this can happen, although based on present science it seems unlikely that the Greenland and West Antarctic ice sheets can melt on a scale of decades.

There's a blog for following all of this, although the emphasis is on the north.
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Quoting washingtonian115:
Must be something the youngster know of..because this old hag is lost.


You ever figure it out??
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This is very interesting to watch if you are bored, the media coverage of Hurricane Andrew. Here is the link to part one...

Hurricane Andrew 1992 As It Happened! Part-1
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Quoting GeoffreyWPB:
Doctors have concluded that if you find the man in the coffee beans in 3 seconds, the right half of your brain is better developed than most people. If you find the man between 3 seconds and 1 minute, the right half of the brain is developed normally. If you find the man between 1 minute and 3 minutes, then the right half of your brain is functioning slowly and you need to eat more protein If you have not found the man after 3 minutes, the advice is to look for more of this type of exercise to make that part of the brain stronger!!!

And, yes, the man is really there!!!



I found him in 3 seconds. I guess that makes me special?
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.................................Alaska is shaking
Member Since: August 6, 2011 Posts: 4 Comments: 42045
Member Since: August 6, 2011 Posts: 4 Comments: 42045
Quoting ScottLincoln:


Raw radar product looks like it is doing decently well, although maybe slightly over-estimating in a few places.

http://www.srh.noaa.gov/ridge2/RFC_Precip/


Maybe in spots, but we've had every bit of 4-5 inches where I live. We are building a new lake and two days ago, it was 4 feet below being full. After today's rain, it is even with the spillway. It's around 10 acres, so it's a large area of water. Not bad for a couple days work!
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Those of you who do NOT see the adverts miss the humor in the computer generated ad choices...(based on machine reading of the content)

as in this one currently:

Twice The Ice
www.icehouseamerica.com
Bulk & Bagged Ice Vending Manufactured by Ice House America
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Hi pottery,how is the weather at TT?
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Quoting BahaHurican:
Something else I've noticed this year is how far north of the ITCZ these Twaves r floating... pretty much disconnected almost from the get-go... wonder if part of the reason they're having a hard time overcoming the SAL is the ITCZ positioning well south for this time of year.



Well according to the last month of precipitation anomalies, the ITCZ is actually slightly farther north than normal in the eastern Atlantic and western Africa. Tropical waves probably seem to be struggling because it is not yet the time of year for them to thrive. In July they almost always fail to become much, and the SAL will always be strong during the downward phase of the MJO over the Atlantic basin.

Additionally, tropical waves becoming separated from the ITCZ is usually a sign of strength and enough amplification to break off from the equatorial trough. Although this can expose them to more dry air entrainment, it usually means they were healthy waves to begin with.

TRMM 30-day rainfall anomalies:

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Quoting GeoffreyWPB:
Doctors have concluded that if you find the man in the coffee beans in 3 seconds, the right half of your brain is better developed than most people. If you find the man between 3 seconds and 1 minute, the right half of the brain is developed normally. If you find the man between 1 minute and 3 minutes, then the right half of your brain is functioning slowly and you need to eat more protein If you have not found the man after 3 minutes, the advice is to look for more of this type of exercise to make that part of the brain stronger!!!

And, yes, the man is really there!!!


Took me 3-7 seconds to find him.
Member Since: March 16, 2012 Posts: 127 Comments: 7972
Quoting GeoffreyWPB:
Doctors have concluded that if you find the man in the coffee beans in 3 seconds, the right half of your brain is better developed than most people. If you find the man between 3 seconds and 1 minute, the right half of the brain is developed normally. If you find the man between 1 minute and 3 minutes, then the right half of your brain is functioning slowly and you need to eat more protein If you have not found the man after 3 minutes, the advice is to look for more of this type of exercise to make that part of the brain stronger!!!

And, yes, the man is really there!!!

found it in 7 seconds... whew!
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312. JLPR2
Quoting MississippiWx:
Plus this post if you can find the the mistake. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.


Nice!
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Quoting WxGeekVA:




Lol..:-D

Seems like a lot of you figured it out. The human brain often does not comprehend "the the" in a sentence and sees it just as one "the".
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Quoting Patrap:
He looks dry roasted too...
..lol
Member Since: August 6, 2011 Posts: 4 Comments: 42045
....ah if this pans out, we get a few days of sun to dry out before it begins again
Member Since: August 6, 2011 Posts: 4 Comments: 42045
Something else I've noticed this year is how far north of the ITCZ these Twaves r floating... pretty much disconnected almost from the get-go... wonder if part of the reason they're having a hard time overcoming the SAL is the ITCZ positioning well south for this time of year.

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Member Since: March 16, 2012 Posts: 127 Comments: 7972
He looks dry roasted too...
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Quoting GeoffreyWPB:
Doctors have concluded that if you find the man in the coffee beans in 3 seconds, the right half of your brain is better developed than most people. If you find the man between 3 seconds and 1 minute, the right half of the brain is developed normally. If you find the man between 1 minute and 3 minutes, then the right half of your brain is functioning slowly and you need to eat more protein If you have not found the man after 3 minutes, the advice is to look for more of this type of exercise to make that part of the brain stronger!!!

And, yes, the man is really there!!!

..GOT'EM, wont tell where
Member Since: August 6, 2011 Posts: 4 Comments: 42045
Doctors have concluded that if you find the man in the coffee beans in 3 seconds, the right half of your brain is better developed than most people. If you find the man between 3 seconds and 1 minute, the right half of the brain is developed normally. If you find the man between 1 minute and 3 minutes, then the right half of your brain is functioning slowly and you need to eat more protein If you have not found the man after 3 minutes, the advice is to look for more of this type of exercise to make that part of the brain stronger!!!

And, yes, the man is really there!!!

Member Since: September 10, 2007 Posts: 0 Comments: 11538
There is also dry air in the Caribbiean.

So even if the wave/low doesnt hit S. America, then it is torn apart by dry air and shear. No development of this system.
Member Since: March 16, 2012 Posts: 127 Comments: 7972


Whoa... that is one serious high... No wonder the wx has been so great here... I'm talking clear blue skies, light easterly winds, penetrating sunshine... great beach weather... Passed one of our beaches on the way home the other night, just after the sun had set, and there were still 2-3 dozen pple in the water...

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Quoting stormpetrol:
The wave in the East/C Atlantic has a chance to become our new atl invest IMO. Could be a Caribbean Cruiser!

The dominant steering is just about due west all the way.......
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Evening everybody... guess, even before reading the comments, that the ATL is still saying

"Nuttin".... lol

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Scattered Showers for Puerto Rico in the next couple of days.

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE SAN JUAN PR
838 PM AST WED JUL 18 2012

.UPDATE...WEAK TROUGH NOW MOVING INTO THE U.S. VIRGIN ISLANDS AND
SHOULD MOVE INTO PUERTO RICO AFTER MIDNIGHT WITH INCREASED
SHOWERS AND THE POSSIBILITY OF A THUNDERSTORM. THE TROPICAL WAVE
WHICH IS FOLLOWING CLOSELY APPEARS TO BE ACCELERATED BY THE
WIND SURGE BEHIND IT...AND HAS BROKEN FREE OF ITS ATTACHMENT TO
THE ITCZ TO THE SOUTHEAST. IT IS TIMED TO MOVE INTO PUERTO RICO
AFTER 19/18Z. THE 19/00Z SOUNDING WAS SOMEWHAT DRY BY TROPICAL
STANDARDS BUT IS INDICATIVE OF THE DRIER AIR AHEAD OF THE TROUGH.

&&

.AVIATION...
MOISTURE ASSOCIATED WITH A TROPICAL WAVE WILL AFFECT THE
LOCAL ISLANDS THROUGH THE FORECAST PERIOD. CLOUDINESS AND SHOWERS
WILL INCREASE ONCE AGAIN ACROSS TNCM AND TKPK AFT 19/08Z...SPREADING
OVER USVI AFT 19/13Z AND OVER PR BTWN 19/15Z AND 19/23Z. MVFR/IFR
CONDS ARE POSSIBLE IN PASSING SHRA/TSRA. MOUNTAIN OBSCURATIONS ARE
EXPECTED ACROSS THE INTERIOR PORTIONS OF PR IN THE AFTERNOON. DEEP
EASTERLY WINDS WILL CONTINUE THROUGH THE FORECAST PERIOD. WIND
SPEEDS AT THE SFC WILL RANGE BTWN 15 TO 20 KTS WITH HIGHER GUSTS
UP TO 30 KTS NEAR SHRA/TSRA.
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Member Since: August 6, 2011 Posts: 4 Comments: 42045
296. wxmod
Canada has joined the list of smokin' places to visit. MODIS image

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Quoting aislinnpaps:


Ouch, Pat. But I had a great time last weekend in NO, spent the one really big storm at Pat O'Brians. My one drink of the weekend. *G* Literally. But it was a great place to wait the storm out.



Patio Bar, or Piano, or my personal Fave, the Front Bar?

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Member Since: March 16, 2012 Posts: 127 Comments: 7972
The wave in the East/C Atlantic has a chance to become our new atl invest IMO. Could be a Caribbean Cruiser!
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Quoting MississippiWx:
Rain is piling up here in South MS. Four to six inches in spots since just last night. Of course, it is creating flash flood issues today as we just had 2-4 inches in an hour.



Raw radar product looks like it is doing decently well, although maybe slightly over-estimating in a few places.

http://www.srh.noaa.gov/ridge2/RFC_Precip/
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SPECIAL WEATHER STATEMENT
LAZ040-072-190200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
759 PM CDT WED JUL 18 2012

...CLUSTER OF STRONG THUNDERSTORMS MOVING SOUTH AFFECTING SOUTHWEST
ST. TAMMANY PARISH...SOUTHEAST TANGIPAHOA PARISH...

AT 751 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS NEAR MADISONVILLE AND ALONG THE
ST. TAMMANY AND TANGIPAHOA PARISH LINE SOUTH OF INTERSTATE 12. THESE
THUNDERSTORMS WERE MOVING SLOWLY TO THE SOUTH.

THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS AROUND MADISONVILLE.

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS TO NEAR 40 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND
UNSECURED SMALL OBJECTS. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE WITH
THESE THUNDERSTORMS. SEEK SHELTER IN A SAFE HOME OR BUILDING
UNTIL THESE STORMS HAVE PASSED.

$$
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Quoting Patrap:
Big Bada Boomer



Ouch, Pat. But I had a great time last weekend in NO, spent the one really big storm at Pat O'Brians. My one drink of the weekend. *G* Literally. But it was a great place to wait the storm out.
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Member Since: August 6, 2011 Posts: 4 Comments: 42045
Big Bada Boomer

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Quoting GeoffreyWPB:


Aww. Booo! You ruined the fun! SHAME.

*Grumbles*
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Quoting GeoffreyWPB:
Yeah I was looking at that.lol.
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Member Since: March 16, 2012 Posts: 127 Comments: 7972
Quoting MississippiWx:
Plus this post if you can find the the mistake. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
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Quoting GeorgiaStormz:


i can.
hey, no hard feelings.

good night everybody, auf wiedersehen
Must be past his bed time.
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Must be something the youngster know of..because this old hag is lost.
Member Since: August 14, 2010 Posts: 10 Comments: 17799
Quoting ProgressivePulse:
000
FXUS62 KMFL 182357
AFDMFL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
ISSUED 245 PM EDT WED JUL 18 2012

LONG TERM...
A TROPICAL WAVE LOCATED JUST EAST OF THE LEEWARD AND WINDWARD
ISLANDS WILL ALSO BE MOVING TO THE WEST NORTHWEST THROUGH THIS
WEEKEND. THE NORTHERN END OF THE TROPICAL WAVE COULD MOVE THROUGH
SOUTH FLORIDA LATE THIS WEEKEND BRINGING AN INCREASE IN MOISTURE
TO THE AREA. SO WILL CONTINUE THE ISOLATED TO SCATTERED COVERAGE
OF SHOWERS AND THUNDERSTORMS FOR THE AREA FOR THIS WEEKEND.

ONCE THIS TROPICAL WAVE MOVES THROUGH THE AREA...ANOTHER SAHARAN
AIR (DUST) LAYER LOCATED OVER THE CENTRAL ATLANTIC WATERS IS
FORECAST BY THE LONG RANGE MODELS TO MOVE INTO SOUTH FLORIDA FOR
MOST OF NEXT WEEK
. THIS IN TURN WILL AGAIN ALLOW FOR THE
ATMOSPHERE TO DRY OUT OVER THE CWA NEXT WEEK. SO WILL KEEP THE
SLIGHT CHANCE OF POPS FOR EARLY NEXT WEEK BEFORE GOING DRY FOR THE
MIDDLE TO END OF NEXT WEEK.

Booooo!!!!!!! I hate when uncle SAL visits

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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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