Greenland experiences melting over 97% of its area in mid-July

By: Dr. Jeff Masters , 12:58 PM GMT on July 25, 2012

Son Nghiem of NASA's Jet Propulsion Laboratory in Pasadena, CA, was analyzing radar data from the Indian Space Research Organization's Oceansat-2 satellite last week when he noticed that 97% of Greenland appeared to have undergone surface melting on July 12--an event completely unprecedented in 30 years of satellite measurements. In a July 24 press release from NASA, Nghiem said, "This was so extraordinary that at first I questioned the result: was this real or was it due to a data error?" Multiple satellite data sets confirmed the remarkable event, though. Melt maps derived from three different satellites showed that on July 8, about 40 percent of the ice sheet's surface had melted, as a strong ridge of high pressure set up over Greenland. By July 12, the melting had expanded to cover 97% of Greenland. As I blogged about last week, temperatures at 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, had risen above the freezing mark four times in the 12-year span 2000 - 2011. But in mid-July 2012, temperatures eclipsed the freezing mark on five days, including four days in a row from July 11 - 14. Interestingly, ice core records show that in 1889, a similar pronounced melt event occurred at the top of the Greenland Ice Sheet, and such events occur naturally about every 150 years. "But if we continue to observe melting events like this in upcoming years, it will be worrisome," said Lora Koenig, a NASA/Goddard glaciologist and a member of the research team analyzing the satellite data. Such an event could occur as early as this weekend: the latest wunderground forecast for the Greenland Summit calls for above-freezing temperatures to return again by Saturday through Tuesday, with a high of 36°F (2°C) on Tuesday. This would come close to the record warm temperature at Summit of 3.6°C set just two weeks ago. Exceptionally warm temperatures in Greenland this July have been made more likely by the fact that Arctic sea ice area has been at record low levels so far this month. Furthermore, the Greenland Ice Sheet has become darker this July than at any point since satellite measurements began (Figure 2), allowing Greenland to absorb more solar energy and heat up.


Figure 1. Extent of surface melt over Greenland's ice sheet on July 8 (left) and July 12 (right). Measurements from three satellites showed that on July 8, about 40 percent of the ice sheet had undergone thawing at or near the surface. In just a few days, the melting had dramatically accelerated and an estimated 97 percent of the ice sheet surface had thawed by July 12. Image credit: NASA.



Figure 2. The albedo (reflectivity) of the Greenland Ice Sheet at its highest elevations (2,500 - 3,200 meters, or 8,200 - 10,500 feet) has steadily decreased in recent years as the ice has darkened due to increased melting and dark soot being deposited on the ice from air pollution. This July, the high elevations of Greenland were the darkest on record, which helped contribute to the record warm temperatures observed at the Greenland Summit. Image credit: Dr. Jason Box, Ohio State University.


Video 1. Melt water from the record July temperatures in Greenland fed the raging Watson River, which smashed 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.

Greenland's Petermann Glacier
Greenland's glaciers have seen significant changes in recent years, as they respond to warmer air and water temperatures. Northwest Greenland's Petermann Glacier has seen two massive calving events in the past two years, though it is uncertain if these events were caused by the warming climate. The most recent event came on July 16, 2012, when the glacier calved a 46 square-mile iceberg two times the size of Manhattan. 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. According to a university press release by Andreas Muenchow, associate professor of physical ocean science and engineering at the University of Delaware's College of Earth, Ocean, and Environment, “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. 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 3. The massive 46 square-mile iceberg two times the size of Manhattan that calved from Greenland's Petermann Glacier on July 16, 2012, as seen on July 21, 2012, using MODIS satellite imagery. Image credit: NASA.

Related posts
Record warmth at the top of the Greenland Ice Sheet (July 18, 2012)
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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Member Since: December 31, 1969 Posts: Comments:
Quoting Tribucanes:
Not out of the question to see 20/40 twisters tomorrow if this sets up like the experts are thinking.

Mostly a wind threat tomorrow, but with a few tornadoes.
Member Since: December 31, 1969 Posts: Comments:
Quoting Tribucanes:
Not out of the question to see 20/40 twisters tomorrow if this sets up like the experts are thinking.


where are "they" thinking this setup will be?
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Member Since: December 31, 1969 Posts: Comments:


Link Storm Prediction Center
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Not out of the question to see 20/40 twisters tomorrow if this sets up like the experts are thinking.
Member Since: December 31, 1969 Posts: Comments:
Overnight A chance of showers and thunderstorms. Some storms could be severe, with large hail and damaging winds. Mostly cloudy, with a low around 76. Southwest wind 9 to 17 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Member Since: December 31, 1969 Posts: Comments:
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Member Since: December 31, 1969 Posts: Comments:
Wow, every few minutes a new cell is popping here in Wisconsin. This is rapidly intensifying. This is going to be a thousand mile line of severe storms tonight. I'm getting concerned this could be an epic night. FireWeather161, with what we're seeing tonight; preparing for the worst tomorrow would be very wise. Tornado possibilities are unknown at this time for tomorrow, but at least a certain area will be probably at least under a 10% to 20% chance of tornadoes. According to the projections it's only going to be a small corridor where this 10-20% will exist. SPC not sure where this corridor will set up. The 10-20% is not from the SPC, just what I think they may be.
Member Since: December 31, 1969 Posts: Comments:
Member Since: December 31, 1969 Posts: Comments:
Quoting pcola57:


Thanks a ton..I don't know why it didn't occur to me on wator vapor....
I agree,it's pushing hard tonight..TY


Check out the national mosaic! The coordinated effort is what made me look at the water vapor.
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Quoting Bluestorm5:
Pretty peaceful in Raleigh area for first time in a week...



first time in 2 weeks we havent had a sever thunderstorm or urban small stream flood advisory! over 20 inches of rain here near fayetteville, nc the past 3 weeks
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Quoting FireWeather161:
Well, Dr Forbes has spoken and he put a "TorCon" of 4 just above NYC tomorrow. This should be very very interesting. Looks like Jim Cantore may be arriving at LGA any minute..

Anyone think we may see a PDS Severe Thunderstorm Watch or a Tornado Watch here in the NYC metro? Can a PDS watch be based on the threat area or is it only due to storm probabilities with no accounting of the area covered?

Particularly Dangerous Situation watches are issued based on an increased threat of life-threatening weather. It does not matter the size of the watch. They're typically only issued on High risk days, but on occasion you'll find one issued on an upper-end Moderate risk today. The chances of getting one tomorrow in NYC are more unlikely than not.
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Quoting Chicklit:
Link WV Loop US

Got some big wheels turnin to power this huge, powerful line of storms.


Thanks a ton..I don't know why it didn't occur to me on wator vapor....
I agree,it's pushing hard tonight..TY
Thats alot of territory too..
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Blog Update Caribbean Storm Update July 25th 2012






Link


Link
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Member Since: December 31, 1969 Posts: Comments:
Well, Dr Forbes has spoken and he put a "TorCon" of 4 just above NYC tomorrow. This should be very very interesting. Looks like Jim Cantore may be arriving at LGA any minute..

Anyone think we may see a PDS Severe Thunderstorm Watch or a Tornado Watch here in the NYC metro? Can a PDS watch be based on the threat area or is it only due to storm probabilities with no accounting of the area covered?
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Quoting Chicklit:
Severe Thunderstorm Watch #523
Issued/Updated: Jul 26, 2012 at 0154 UTC
Expires: Jul 26, 2012 at 0800 UTC
Severe Thunderstorm Watch 523 Status Message has not been issued

(Looks like maybe the NWS-folks are getting a little excited.)


Quick question for you Chicklit..
Been watching the storms form and I want to see where the current Jet Stream is in relation to it all but I can't put my finger on where to get that image...Help!!..TIA.
PS..I think thats the first time I ever used 2 words with a "Q" side by side in my life..LOL.. :)
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BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 950 PM EDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MASON COUNTY IN WEST CENTRAL MICHIGAN... OCEANA COUNTY IN WEST CENTRAL MICHIGAN... * UNTIL 1100 PM EDT
* AT 947 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE 25 MILES WEST OF LUDINGTON TO 55 MILES NORTHWEST OF LUDINGTON..AND MOVING SOUTHEAST AT 60 MPH.
* LOCATIONS IMPACTED INCLUDE...PENTWATER...LUDINGTON... SHELBY...FREESOIL...SILVER LAKE STATE PARK...CRYSTAL VALLEY...FERRY...ELBRIDGE...MEARS...STONY LAKE...NEW ERA...LITTLE POINT SABLE... ROTHBURY...WALKERVILLE... HART...LAKE MICHIGAN RECREATION AREA...HAMLIN LAKE... BIG SABLE POINT...
PRECAUTIONARY/PREPAREDNESS ACTIONS... THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
TO REPORT SEVERE WEATHER...CONTACT THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS AT 1 800 647 3836.
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Quoting washingtonian115:
No.They have the pressures of one.But aren't one.


I dont know Wash..they sure look potent..


Member Since: December 31, 1969 Posts: Comments:
The doc, NC09, and me are in for something, this is what I get for wishing for storms.
Member Since: December 31, 1969 Posts: Comments:
Pretty peaceful in Raleigh area for first time in a week...

Member Since: December 31, 1969 Posts: Comments:
Severe Thunderstorm Watch #523
Issued/Updated: Jul 26, 2012 at 0154 UTC
Expires: Jul 26, 2012 at 0800 UTC
Severe Thunderstorm Watch 523 Status Message has not been issued

(Looks like maybe the NWS-folks are getting a little excited.)
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I live in the tropics and i believe that storms that cause severe weather in the states are more live threating tham the tropical cyclones. At least we ussualy have more than two days before the event.
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South and South Central Wisconsin about to get struck hard tonight too. I can see for miles in all directions and updrafts have really increased quickly over the last hour. This may well be the most dangerous night of weather we've seen in the US outside of the Spring night tornado outbreak that killed dozens.
Member Since: December 31, 1969 Posts: Comments:
Quoting ncstorm:
Wow..look at the low pressures readings over Africa..arent those TD/TS already?

No.They have the pressures of one.But aren't one.
Member Since: December 31, 1969 Posts: Comments:
Member Since: Posts: Comments:
Quoting wxchaser97:
Lol, maybe they forgot.
Should be a "fun" night in SE MI.
The new watch I thought it would be is watch 523, I guess they did forget.
WOUS64 KWNS 260154
WOU3

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 523
NWS STORM PREDICTION CENTER NORMAN OK
900 PM CDT WED JUL 25 2012

SEVERE THUNDERSTORM WATCH 523 IS IN EFFECT UNTIL 300 AM CDT
FOR THE FOLLOWING LOCATIONS
Member Since: December 31, 1969 Posts: Comments:
Wow..look at the low pressures readings over Africa..arent those TD/TS already?

Member Since: December 31, 1969 Posts: Comments:
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 522
NWS STORM PREDICTION CENTER NORMAN OK
950 PM EDT WED JUL 25 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

EASTERN LOWER MICHIGAN
LAKE HURON

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 950 PM UNTIL 500 AM EDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF BAD AXE MICHIGAN TO 15 MILES SOUTHEAST OF ANN ARBOR MICHIGAN.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 518...WW 519...WW 520...

DISCUSSION...COMPLEX MCS EVOLUTION IS ONGOING TONIGHT ACROSS PORTIONS OF LAKE MI INTO NWRN LOWER MI. AHEAD OF THIS ACTIVITY...A STRENGTHENING NOCTURNAL LOW-LEVEL WIND MAXIMUM WILL ENHANCE THE EWD ADVECTION OF THERMODYNAMIC ENVIRONMENT SAMPLED BY 00Z GRB SOUNDING INTO THE REGION. AT THE SAME TIME...DEEP WLY/WNWLY FLOW WILL STRENGTHEN WITH SETUP BECOMING INCREASINGLY SUPPORTIVE OF A WIDESPREAD DAMAGING WIND EVENT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29040.


...MEAD

Member Since: Posts: Comments:
The watch im under has the 65kt threat as HIGH and the wind threat HIGH.
Member Since: December 31, 1969 Posts: Comments:
Quoting TropicalAnalystwx13:

Lol, they skipped 521.
Lol, maybe they forgot.
Should be a "fun" night in SE MI.
Member Since: December 31, 1969 Posts: Comments:


Member Since: December 31, 1969 Posts: Comments:
That's one thing I've seen twice; once as a kid and once about five years ago. Lightening coming through the phone line is a very common thing.
Member Since: December 31, 1969 Posts: Comments:
TORNADO WARNING
MIC035-260245-
/O.NEW.KGRR.TO.W.0006.120726T0144Z-120726T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
944 PM EDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* TORNADO WARNING FOR...
NORTHEASTERN CLARE COUNTY IN CENTRAL MICHIGAN...

* UNTIL 1045 PM EDT

* AT 943 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
DANGEROUS STORM WAS LOCATED 7 MILES SOUTHEAST OF MODDERSVILLE...AND
MOVING SOUTHEAST AT 35 MPH.

* THIS TORNADIC STORM WILL BE NEAR...
LEOTA AROUND 945 PM EDT...
LONG LAKE HEIGHTS AROUND 955 PM EDT...
DODGE LAKE AROUND 1000 PM EDT...

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
HARRISON... CLARE... DODGE LAKE...
LONG LAKE HEIGHTS... WINTERFIELD TWP... FRANKLIN TWP...
SHERIDEN TWP... LEOTA... MEREDITH...
BROWNS CORNER... DOVER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING OBJECTS.

TORNADOES ARE DIFFICULT TO SEE AT NIGHT. DO NOT WAIT TO SEE OR HEAR
THE TORNADO. TAKE COVER NOW...MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4381 8461 4381 8477 4416 8508 4416 8501
4417 8500 4416 8461 4383 8459
TIME...MOT...LOC 0144Z 317DEG 30KT 4413 8487

$$

LAUREN
Member Since: December 31, 1969 Posts: Comments:
Quoting wxchaser97:
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 522
NWS STORM PREDICTION CENTER NORMAN OK
950 PM EDT WED JUL 25 2012

SEVERE THUNDERSTORM WATCH 522 IS IN EFFECT UNTIL 500 AM EDT
FOR THE FOLLOWING LOCATIONS

MIC017-049-063-087-093-099-111-125-145-147-151-15 5-157-161-163-
260900-
/O.NEW.KWNS.SV.A.0522.120726T0150Z-120726T0900Z/

MI
. MICHIGAN COUNTIES INCLUDED ARE

BAY GENESEE HURON
LAPEER LIVINGSTON MACOMB
MIDLAND OAKLAND SAGINAW
SANILAC SHIAWASSEE ST. CLAIR
TUSCOLA WASHTENAW WAYNE

Lol, they skipped 521.
Member Since: Posts: Comments:
Quoting Xyrus2000:


This type of comparison is often brought up by those looking to discredit AGW while glossing over the fact that you can't really compare them. The arctic and Antartic ice are governed by completely different dynamics. About the only thing they share in common is that they are both ice.

As a rudimentary refutation of such a comparison, arctic ice is comprised mainly out of ice that has been around for multiple years. Without the thick multi-year ice, the arctic would completely melt out every summer (which will probably happen in the near future). The antarctic sea ice is comprised almost entirely out of one-year ice that pretty much melts out every summer. The long term ice is locked up on the land mass.

There is warming in the antarctic, but not nearly as much as the arctic. Again, this comes down to the differences between the two "systems".



Horsefeathers,
Member Since: Posts: Comments:
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 522
NWS STORM PREDICTION CENTER NORMAN OK
950 PM EDT WED JUL 25 2012

SEVERE THUNDERSTORM WATCH 522 IS IN EFFECT UNTIL 500 AM EDT
FOR THE FOLLOWING LOCATIONS

MIC017-049-063-087-093-099-111-125-145-147-151-15 5-157-161-163-
260900-
/O.NEW.KWNS.SV.A.0522.120726T0150Z-120726T0900Z/

MI
. MICHIGAN COUNTIES INCLUDED ARE

BAY GENESEE HURON
LAPEER LIVINGSTON MACOMB
MIDLAND OAKLAND SAGINAW
SANILAC SHIAWASSEE ST. CLAIR
TUSCOLA WASHTENAW WAYNE
Member Since: December 31, 1969 Posts: Comments:
Member Since: December 31, 1969 Posts: Comments:
Quoting Tribucanes:
I'm sure it's a fairly rare event, but I've known a handful of people who have had lightening come through their windows at night while they were in the given room. They didn't make it sound enjoyable. It comes in, goes to the nearest electrical source, and in a few cases I heard firsthand; it turns the light on. I'm not crazy thinking that it's a very very low chance this will ever happen to me; am I?

That would scare the living daylights out of me.
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Quoting Tribucanes:
200/300 reports may have been very conservative. I'm thinking maybe twice that now over the warned areas through this evening and tonight. Going to be a dangerous night with these storms only increasing; considering they ain't nice as it is now. If this is the foreshadowing of what tomorrow will bring then it's going to be very bad.
Why havent spotters been activated let in SE MI?
SPOTTER INFORMATION STATEMENT...
DISPATCHERS...PLEASE NOTIFY YOUR EMERGENCY MANAGERS IMMEDIATELY.
SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING INTO THE OVERNIGHT.
Could be very very bad, not a derecho but a mcs.
Member Since: December 31, 1969 Posts: Comments:
It's never smart to be on a phone during a thunderstorm.....Their are plenty of stories that talk about people getting electrocuted....Fried like a chicken at a southern dinner table.
Member Since: December 31, 1969 Posts: Comments:
Quoting Chicklit:

good deal. congrats wx
It will get me through the night, Im having trouble sleeping anyway since Im a night owl.
Member Since: December 31, 1969 Posts: Comments:
200/300 reports may have been very conservative. I'm thinking maybe twice that now over the warned areas through this evening and tonight. Going to be a dangerous night with these storms only increasing; considering they ain't nice as it is now. If this is the foreshadowing of what tomorrow will bring then it's going to be very bad.
Member Since: December 31, 1969 Posts: Comments:
Quoting pcola57:


I've happily helped others here as well..
I hope you get something out my postings also.. :)
Yup and yup.
Member Since: December 31, 1969 Posts: Comments:
Quoting wxchaser97:
I will be staying up for the storms. I want to get storms just because im a spotter now. I'll also stay up for the 00z gfs run.

good deal. congrats wx
Member Since: Posts: Comments:
839. txjac
Quoting Xyrus2000:


This type of comparison is often brought up by those looking to discredit AGW while glossing over the fact that you can't really compare them. The arctic and Antartic ice are governed by completely different dynamics. About the only thing they share in common is that they are both ice.

As a rudimentary refutation of such a comparison, arctic ice is comprised mainly out of ice that has been around for multiple years. Without the thick multi-year ice, the arctic would completely melt out every summer (which will probably happen in the near future). The antarctic sea ice is comprised almost entirely out of one-year ice that pretty much melts out every summer. The long term ice is locked up on the land mass.

There is warming in the antarctic, but not nearly as much as the arctic. Again, this comes down to the differences between the two "systems".


Thanks for the explanation. I wasnt trying to support or debunk anything just curious
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Member Since: December 31, 1969 Posts: Comments:
Quoting wxchaser97:

Your welcome, trying to help others.


I've happily helped others here as well..
I hope you get something out my postings also.. :)
Member Since: Posts: Comments:
Its happening

A NEW SEVERE TSTM WATCH WILL BE ISSUED THIS EVENING ACROSS
ADDITIONAL PORTIONS OF EASTERN MI INCLUDING THE THUMB REGION/PARTS
OF SOUTHEAST MI...LIKELY BETWEEN 02Z-03Z.
SUMMARY...SUPERCELL AND ASSOCIATED SEVERE HAIL/SOME TORNADO
POTENTIAL WILL EXIST IN THE SHORT TERM ACROSS FAR EASTERN WI INTO
NORTH-CENTRAL MI. HOWEVER...IT SEEMS LIKELY THAT BOW ECHO
DEVELOPMENT WILL OCCUR THROUGH THE MID/LATE EVENING HOURS...WITH A
HEIGHTENED WIND DAMAGE POTENTIAL. PORTIONS OF CENTRAL MI HAVE BEEN
UPGRADED TO A MODERATE RISK WITH THE 01Z DAY 1 CONVECTIVE OUTLOOK.
Member Since: December 31, 1969 Posts: Comments:

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Cat 6 lead authors: WU cofounder Dr. Jeff Masters (right), who flew w/NOAA Hurricane Hunters 1986-1990, & WU meteorologist Bob Henson, @bhensonweather

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