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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OMG BORING TIME ISNT ENDING!!!
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Member Since: August 19, 2006 Posts: 13 Comments: 15997
Quoting jrweatherman:


Perfectly normal for July. Heck, we're way ahead of normal with 4 storms.
I know but Im still bored.
I really thought there would be a yellow circle, hopefully tomorrow.
Member Since: March 16, 2012 Posts: 127 Comments: 7956
Quoting wxchaser97:
I hate this image and seeing it over and over again


Perfectly normal for July. Heck, we're way ahead of normal with 4 storms.
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Member Since: March 16, 2012 Posts: 127 Comments: 7956
I hate this image and seeing it over and over again
Member Since: March 16, 2012 Posts: 127 Comments: 7956
This deserves at least a mention in the TWO. The NHC is obviously not impressed due to the lack of model support. The wave has fairly decent vorticity consolidated at 700mb and 500mb, but the 850mb vort is lackluster. Regardless, believe it warrants a circle from the NHC.

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The NHC is waiting to see if this persist.Almost looks like a T.D right now.Maybe it'll get a mention tomorrow if it can keep up organization.
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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.

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120. skook
These are 2 stations from the summit, about 1.2 miles apart and both from July 16.

Link

station 04418

2012-07-16 15:00:00
38.5
2012-07-16 18:00:00
22.6

Link

Station 04416
2012-07-16 15:00:00 28.8
2012-07-16 18:00:00 34.9


So what is considered reliable? I couldn't find the third station which if anyone has a link too would be great.
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Quoting Tropicsweatherpr:
Quick Poll about AOI in Atlantic:

Will NHC have a yellow circle at 8 PM TWO?

A=Yes
B=No

I say A.



000
ABNT20 KNHC 182302
TWOAT

TROPICAL WEATHER OUTLOOK
NWS NATIONAL HURRICANE CENTER MIAMI FL
800 PM EDT WED JUL 18 2012

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS.

$$
FORECASTER BLAKE

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Quoting TropicalAnalystwx13:

A.
The GFS last week was showing a weak tropical depression out there on it's runs by this time.But it dropped it.Probably because of the shear in the caribbean and dry stable air mass.
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Roll cloud



From Reddit
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Miami NWS Discussion

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.
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Quoting Tropicsweatherpr:
Quick Poll about AOI in Atlantic:

Will NHC have a yellow circle at 8 PM TWO?

A=Yes
B=No

I say A.



A.
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Quoting Tropicsweatherpr:
Quick Poll about AOI in Atlantic:

Will NHC have a yellow circle at 8 PM TWO?

A=Yes
B=No

I say A.


Im going with A(10% maybe 20%)
Member Since: March 16, 2012 Posts: 127 Comments: 7956
Quoting spathy:
You know if I were those scientists I would be very upset at the wording used around that footage.
They are doing important work. That type of wording lessens it.


If they put it in writing no matter how its worded, isnt it "fact"?
Member Since: August 19, 2006 Posts: 13 Comments: 15997
Wow, some of that stuff developed really fast!

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Severe Thunderstorm Warning
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
540 PM CDT WED JUL 18 2012

WIC105-182300-
/O.CON.KMKX.SV.W.0044.000000T0000Z-120718T2300Z/
ROCK WI-
540 PM CDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
ROCK COUNTY UNTIL 600 PM CDT...

AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP TO
TENNIS BALL SIZE...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS
STORM WAS LOCATED NEAR EVANSVILLE...MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
EVANSVILLE AROUND 545 PM CDT.

OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE UNION...
COOKSVILLE AND FULTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4267 8937 4280 8937 4285 8935 4284 8918
4285 8917 4285 8908 4269 8902
TIME...MOT...LOC 2240Z 255DEG 10KT 4275 8930
WIND...HAIL 60MPH 2.50IN
Member Since: March 16, 2012 Posts: 127 Comments: 7956
Quoting spathy:
And are the lakes melting? Or are they draining away?
they drain away the water gathers in the depression on the ice slowly that water eats away at the ice till a channel forms where by large lakes would simply disappear overnight
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Quoting Tropicsweatherpr:
Quick Poll about AOI in Atlantic:

Will NHC have a yellow circle at 8 PM TWO?

A=Yes
B=No

I say A.


A.
Member Since: Posts: Comments:
Quick Poll about AOI in Atlantic:

Will NHC have a yellow circle at 8 PM TWO?

A=Yes
B=No

I say A.

Member Since: April 29, 2009 Posts: 75 Comments: 14545
100. skook
Is there such a thing as reliable temperature data? So much data seems to be "bogus"?
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Quoting spathy:


I am sure you meant to say hours of glacial melting.
Not entire glaciers melting in hours as those words implied.


That's quoted from the Video tags here, I added nothing.



Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting Grothar:


Blobification will take a little time.

Put One Foot in Front of the Other

http://www.youtube.com/watch?v=f9jeh4mA5us

Krinkle Claus.
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some things to know about global warming
Sea level has risen around 17 cm in the last 5 decades about 1/2 Century
the global tendency in the last 50 years is 3.0 millimeters per year
the estimation of increase of this century is about 30 to 40 cm

I'm from dominican republic and the vice president says a conference in cancum mexico about the clime change, that this country (dominican republic) could lost in a short time about 13% of coastal territory

And we have now see some evidence El Lago Enriquillo is the grattes lake on the antilles islands and has increased in the last 5 years abot 20cm



Lake NOW


Lake IN FUTURE


WILL NOT EXIST
we need do something RAPIDLY
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Quoting ncstorm:
Plenty of lows coming off Africa on the GFS, they just plop..
Member Since: March 16, 2012 Posts: 127 Comments: 7956
Quoting Tazmanian:




why are you posting some in that is classified i would re move it if i where you


WAS classified. It is now de-classified.
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Quoting Grothar:
Not quite a blob yet.


I see a blob over yucatan
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I knew I was different when I pulled for the Giant over Jack.




Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting KEEPEROFTHEGATE:


you cannot beat visions they are what they are and what they will become


i've seen all these things
and more since i've been a boy
my grandfather called it a curse


I knew you were going to write that!!
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Plenty of lows coming off Africa on the GFS, they just plop..
Member Since: August 19, 2006 Posts: 13 Comments: 15997
Quoting Grothar:
I posted this in the previous blog, but it may have been lost. Just to settle the argument as to where the submarines emerged. This was classified, but this is proof positive if you look closely.





why are you posting some in that is classified i would re move it if i where you
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Member Since: March 16, 2012 Posts: 127 Comments: 7956


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Quoting PensacolaDoug:


Wanna bet?


you cannot beat visions they are what they are and what they will become


i've seen all these things
and more since i've been a boy
my grandfather called it a curse
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Quoting KEEPEROFTHEGATE:
water is also melting the ice from below upward twice the melting effect


Are you sure?:)
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Quoting RussianWinter:


Could be... But that's ok!

New cities will be built. We will have to deal with that, but we WILL survive.
yes im sure we will, although if this becomes reaality, huge changes are in store, maybe even wars, big wars,for the available high ground, lets hope not
Member Since: August 6, 2011 Posts: 4 Comments: 40742
Hot and dry on the west side, stormy on the right side.
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Dr. Masters.... please note that the link for:

Image taken from an article, Warm air over the ice sheet provides great drama in Greenland, at the Danish Meteorological Institute's web site.

takes one to a translation of temperature data labeled:
Weather extremes in Geeenland
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I posted this in the previous blog, but it may have been lost. Just to settle the argument as to where the submarines emerged. This was classified, but this is proof positive if you look closely.

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Member Since: March 16, 2012 Posts: 127 Comments: 7956

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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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