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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Quoting TropicalAnalystwx13:

I am aware.

It doesn't matter anyways though right? Don't the black ones just indicate speed contamination? If so then it would still indicate a circulation.
Member Since: February 11, 2012 Posts: 84 Comments: 7925
Updated QPF map

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Quoting AussieStorm:

You mean this one??

You do know the black wind flags mean tainted and may not be true readings.

I am aware.
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Quoting MississippiWx:
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.



The AOI has a ULAC with it. Most interesting wave yet. almost there, imo.

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Quoting CANTBELIEVEIT:
what does everyone think? another dud hurricane season for florida?

Nice try Janiel.
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Quoting Tribucanes:
Very strong line of bowing storms coming through my neck of the woods here just north of Madison, Wisconsin. Strongest part of this line looks to have 80-90mph potential. Already may be producing 80mph winds and increasing quickly still. Finally some rain. Going to get close to two two and a half inches of rain in a thirty minute to hour span. Lot of runoff but it will help. Ugly line though, La Cross radar in NW Wisconsin shows a great radar shot of this line.
Member Since: March 16, 2012 Posts: 127 Comments: 7958
Quoting washingtonian115:
Yes I mentioned Ike in their to.

Oops... I'm tired... Guess I need to read comments more closely before commenting on them.
Member Since: February 11, 2012 Posts: 84 Comments: 7925
Quoting MAweatherboy1:

Not to mention Ike right after those... 2008 was not a good year.
Yes I mentioned Ike in their to.
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what does everyone think? another dud hurricane season for florida?
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Quoting TropicalAnalystwx13:

Check OSCAT.

You mean this one??

You do know the black wind flags mean tainted and may not be true readings.
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Quoting MAweatherboy1:
I don't think the wave will develop... However if it maintains or increases convection tonight we may see a 10% yellow at 8AM tomorrow.

Agreed.
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Was just watching the "Hurricane Hunters" show on Weather Channel that I recorded... I remember tracking the missions into Irene, Katia, Maria, and Nate on the computer and I thought the show was pretty cool.
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Very strong line of bowing storms coming through my neck of the woods here just north of Madison, Wisconsin. Strongest part of this line looks to have 80-90mph potential. Already may be producing 80mph winds and increasing quickly still. Finally some rain. Going to get close to two two and a half inches of rain in a thirty minute to hour span. Lot of runoff but it will help. Ugly line though, La Cross radar in NW Wisconsin shows a great radar shot of this line.
Member Since: April 18, 2012 Posts: 0 Comments: 2437
Quoting washingtonian115:
Unfortunately Gustav caused server damage in Havanna and later went on to hit L.A and ended up causing over 100+ deaths during it's life time.Hanna ended up killing 800 people and Ike went on to become Cuba's worst hurricane and the 3rd expensive hurricane in U.S history also killing almost 200 people.

Not to mention Ike right after those... 2008 was not a good year.
Member Since: February 11, 2012 Posts: 84 Comments: 7925
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Quoting SFLWeatherman:
IS this good!! lol

As long as no land is majorly impacted I'm fine( bye-bye Gustav and Hanna and Ike doesn't hit/impact land in this scenario).
Member Since: March 16, 2012 Posts: 127 Comments: 7958
Quoting SFLWeatherman:
IS this good!! lol

Unfortunately Gustav caused server damage in Havanna and later went on to hit L.A and ended up causing over 100+ deaths during it's life time.Hanna ended up killing 800 people and Ike went on to become Cuba's worst hurricane and the 3rd expensive hurricane in U.S history also killing almost 200 people.
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I don't think the wave will develop... However if it maintains or increases convection tonight we may see a 10% yellow at 8AM tomorrow.
Member Since: February 11, 2012 Posts: 84 Comments: 7925
Quoting washingtonian115:
But not for long.


for a while
Member Since: February 11, 2012 Posts: 0 Comments: 9737


We had .44 of an inch from a T-storm and had lightning bring down a tree somewhere nearby by the sound of the resulting thunder.
Member Since: July 2, 2012 Posts: 101 Comments: 10417
Quoting GeorgiaStormz:
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

yes i win
But not for long.
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IS this good!! lol

Quoting wxchaser97:
I hate this image and seeing it over and over again
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TROPICAL WAVE IS ADJUSTED FARTHER W TO ALIGN WITH A WEAK 1014 MB
SURFACE LOW EMBEDDED WITHIN THE MONSOON TROUGH AT 12N33W. THE
WAVE EXTENDS FROM THE LOW CENTER TO 18N33W. DUE TO THE
APPEARANCE OF THE LOW IT IS HARD TO DETERMINE THE CURRENT MOTION
OF THE WAVE...BUT IT IS LIKELY AROUND 10-15 KT TO THE W. A LARGE
AREA OF SAHARAN DUST SURROUNDS THE WAVE TO THE N AND IS LIMITING
CONVECTION NEAR IT. SCATTERED MODERATE CONVECTION IS NEAR THE
LOW CENTER AND TO THE W. THE CONVECTION TO THE W WILL BE
DESCRIBED IN THE MONSOON TROUGH SECTION.
Member Since: February 11, 2012 Posts: 0 Comments: 9737
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

yes i win
Member Since: February 11, 2012 Posts: 0 Comments: 9737
"Impressive" as Darth would say,def.
Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting AussieStorm:

If it had a closed low, it would be spinning. I am looking at Satellite images and I can't see any spin.


Check OSCAT.
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Quoting Patrap:
New York City Hail: Severe Thunderstorm Watch Remains In Effect As Storms Bring Rain, Lightning, Hail (TWEETS) (PHOTOS)
The Huffington Post | By Craig Kanalley
Posted: 07/18/2012 5:17 pm Updated: 07/18/2012 6:23 pm




Just hours after the sun was shining and temperature hovered close to 100 degrees, severe storms brought hail, rain, high winds, thunder and lightning on New York City, among other places, this afternoon.

As has become typical with such storms, the weather conditions in New York were live tweeted by many.


While flying 10,000 feet above Queens, former NFL player Dhani Jones took this incredible photo :





One of the best pics I've seen in a while.
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Quoting nrtiwlnvragn:


Well at least Naval Postgraduate School is tracking it:




SYNOPSIS 2012071800

* Still working on GFS computer issues.

P05L
15N, 25W
700 hPa


ECMWF: Distinct pouch in the analysis moves southwestward into the ITCZ. Uncertain pouch positions at intermittent times.

GFS:

UKMET: Pouch at 15N in the analysis dives immediately into the ITCZ by 12 hours. I decide to track the pouch because it moves steadily westward. It's only an OW max at 60 hours, and is not trackable after that.

NOGAPS: (MISSING 60-H FORECAST). Pouch lasts at least until 48 hours, but is gone at 72 hours.


Edit: After looking at it, they are tracking a different area, a least nice to see they are back tracking pouches!


Yeah,I like the Predict team work as they analize in depth the waves.
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Member Since: March 16, 2012 Posts: 127 Comments: 7958
Quoting washingtonian115:
It's this disturbance out in the Atlantic.It appears to have a closed low and good convergence.

If it had a closed low, it would be spinning. I am looking at Satellite images and I can't see any spin.

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Quoting wxchaser97:
Yeah, atleast no one is getting impacted by a destructive hurricane, but a yellow circle would be nice.
We need another Chris!.
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Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting Patrap:
New York City Hail: Severe Thunderstorm Watch Remains In Effect As Storms Bring Rain, Lightning, Hail (TWEETS) (PHOTOS)
The Huffington Post | By Craig Kanalley
Posted: 07/18/2012 5:17 pm Updated: 07/18/2012 6:23 pm




Just hours after the sun was shining and temperature hovered close to 100 degrees, severe storms brought hail, rain, high winds, thunder and lightning on New York City, among other places, this afternoon.

As has become typical with such storms, the weather conditions in New York were live tweeted by many.


While flying 10,000 feet above Queens, former NFL player Dhani Jones took this incredible photo :




That image sort of make you realise how small you are down on the ground!
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Quoting PlazaRed:

Patience is a virtue!
Intolerance of the image will not make it go away.
Or in fact cause it to be replaced by something more acceptable to you.
PS I find the image a trifle dull too!
Yeah, atleast no one is getting impacted by a destructive hurricane, but a yellow circle would be nice.
Member Since: March 16, 2012 Posts: 127 Comments: 7958
New York City Hail: Severe Thunderstorm Watch Remains In Effect As Storms Bring Rain, Lightning, Hail (TWEETS) (PHOTOS)
The Huffington Post | By Craig Kanalley
Posted: 07/18/2012 5:17 pm Updated: 07/18/2012 6:23 pm




Just hours after the sun was shining and temperature hovered close to 100 degrees, severe storms brought hail, rain, high winds, thunder and lightning on New York City, among other places, this afternoon.

As has become typical with such storms, the weather conditions in New York were live tweeted by many.


While flying 10,000 feet above Queens, former NFL player Dhani Jones took this incredible photo :



Member Since: July 3, 2005 Posts: 426 Comments: 129089
Quoting wxchaser97:
I hate this image and seeing it over and over again

Patience is a virtue!
Intolerance of the image will not make it go away.
Or in fact cause it to be replaced by something more acceptable to you.
PS I find the image a trifle dull too!
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As said before the NHC is waiting to see of it persist.It will surprise me if we get a weak T.D out of this though.
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Quoting Tropicsweatherpr:


I know that they have been releasing the TWO's very early lately,but this was superearly. I still think it deserves at least a 10%.


Well at least Naval Postgraduate School is tracking it:




SYNOPSIS 2012071800

* Still working on GFS computer issues.

P05L
15N, 25W
700 hPa


ECMWF: Distinct pouch in the analysis moves southwestward into the ITCZ. Uncertain pouch positions at intermittent times.

GFS:

UKMET: Pouch at 15N in the analysis dives immediately into the ITCZ by 12 hours. I decide to track the pouch because it moves steadily westward. It's only an OW max at 60 hours, and is not trackable after that.

NOGAPS: (MISSING 60-H FORECAST). Pouch lasts at least until 48 hours, but is gone at 72 hours.


Edit: After looking at it, they are tracking a different area, a least nice to see they are back tracking pouches!
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This wave is much better defined than Invest 97L ever Was. Very surprised there has been no mention yet.
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Quoting jrweatherman:


It is a pretty good slug of moisture along the wave axis. I guess they are waiting to see if it holds together.
Hopefully thats all, it has a low pressure with it.
Member Since: March 16, 2012 Posts: 127 Comments: 7958
The Middle and Eastern Atlantic could use a case o Fresca itsa so Ack, coff, dryyyyyyy.
Member Since: July 3, 2005 Posts: 426 Comments: 129089
no yellow at 8pm


may eventually get a 0%

the wave is gonna hit the SAL and then S America
If it pulls north it doesnt have a chance with the SAL
Member Since: February 11, 2012 Posts: 0 Comments: 9737
Quoting AussieStorm:

I guess they don't think anything in the ATL deserves a yellow crayon.


Where is thus TD you speak of. I want to find it and take it's head of with my sword. lol
It's this disturbance out in the Atlantic.It appears to have a closed low and good convergence.
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Quoting wxchaser97:
I know but Im still bored.
I really thought there would be a yellow circle, hopefully tomorrow.


It is a pretty good slug of moisture along the wave axis. I guess they are waiting to see if it holds together.
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Maybe this is the reason they aren't moving on this aoi. I posted this earlier this afternoon on Dr Master's previous blog (#581) and I'm reposting the pic from the posting made by wxchaser97 (#566). Hope that is ok to do.

From Nasa's Hurricane webpage:

ATLANTIC - Watching three tropical waves today.
1) Eastern Tropical Atlantic from 19N2 9W to 13N 28W. Limited moisture and a layer of dry Saharan air.
2) Wave headed to Lesser Antilles from 19N 55W TO 11N 54W and moving west. Has limited shower activity due to more Saharan dust.
3) Eastern coastal waters of Yucatan Peninsula, moving west and bringing scattered t-storms west of 85W, inland across the Yucatan.

Kink Nasa's Hurricane webpage
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Member Since: March 16, 2012 Posts: 127 Comments: 7958
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Quoting Tropicsweatherpr:


I know that they have been releasing the TWO's very early lately,but this was superearly. I still think it deserves at least a 10%.

I guess they don't think anything in the ATL deserves a yellow crayon.

Quoting washingtonian115:
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.

Where is thus TD you speak of. I want to find it and take it's head of with my sword. lol
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Quoting nrtiwlnvragn:


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



I know that they have been releasing the TWO's very early lately,but this was superearly. I still think it deserves at least a 10%.
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OMG BORING TIME ISNT ENDING!!!
Member Since: October 6, 2007 Posts: 0 Comments: 6415

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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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