Greenland 2021-22 SMB, melting and GRACE mass

[gerontocrat]

6 September Data

Precipitation  About average

Melt down from 5.6% to 4.33%, average for this day of the year.

SMB increased by 0.8GT below the average daily SMB gain for this time of year.
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Of interest is that although overall SMB increases, SMB loss continues on the coastal regions of the southern half of Greenland.
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Up to 5 Sept data can be found at
https://forum.arctic-sea-ice.net/index.php/topic,3285.msg321066.html#msg321066

[Stephan]

At the southern tip of Grønland the melting season is far from over.
Here is the actual forecast for Narsarsuaq from Sep 08-Sep 21, 2021

[gerontocrat]

8 September Data

As Stephan has pointed out, melt and SMB loss continue on the coastal regions of southern Greenland.

click images to enlarge

[gerontocrat]

Climate change -

a hurricane image on the Greenland thread.
Apart from wind and rain, how much warmth will it bring?

[FrostKing70]

CNN is reporting Larry will bring feet of snow, should be interesting to see the SMB after it passes through!

https://www.cnn.com/2021/09/10/weather/hurricane-larry-forecast-weekend-snow-greenland/index.html

"Widespread totals of 12 to 18 inches are expected in the eastern half of the island nation. Higher elevations along the east coast could get 2 to 4 feet or higher."

[gerontocrat]

Post-tropical storm Larry should hit SE Greenland late Saturday and all day Sunday.
May be quite an event.

https://www.nhc.noaa.gov/text/refresh/MIATCDAT2+shtml/111437.shtml?
Post-Tropical Cyclone Larry Forecast Discussion

Post-Tropical Cyclone Larry Discussion Number  44
NWS National Hurricane Center Miami FL       AL122021
1100 AM AST Sat Sep 11 2021

Satellite images indicate that Larry has completed its transition to
a post-tropical cyclone with most of the deep convection dissipating
near the low-level center and frontal features developing.  In
addition, the low- and mid-level centers are now well separated,
and the cyclone appears a little weaker.  The initial intensity is
estimated to be 60 kt.  The post-tropical system is very large and
gale-force winds and high seas extend far from the center. It is
interesting to note that up to just several hours ago Larry had
maintained an inner core and a fairly tropical appearance despite
being at very high latitudes and over quite cold water.  Larry is
racing northeastward, with the initial motion estimated to be 030/42
kt. The storm is expected to merge with another large extratropical
low tonight or early Sunday.

[gerontocrat]

Larry is dumping stuff on Greenland as I write this.

So here are some images for yesterday - i.e before Larry. Tomorrow will be data for during Larry, and Tuesday for after Larry.

[The Walrus]

It will be quite interesting to see the impacts.

https://www.severe-weather.eu/winter-weather/atlantic-hurricane-season-2021-larry-winter-storm-forecast-snow-greenland-mk/

[RoxTheGeologist]

CNN is reporting Larry will bring feet of snow, should be interesting to see the SMB after it passes through!

https://www.cnn.com/2021/09/10/weather/hurricane-larry-forecast-weekend-snow-greenland/index.html

"Widespread totals of 12 to 18 inches are expected in the eastern half of the island nation. Higher elevations along the east coast could get 2 to 4 feet or higher."

A nice insulating blanket to trap in all the summer heat!

[FrostKing70]

20 Gigatonnes from one storm?  Hard to wrap my mind around that forecast!

"As Larry continues northward, it will evolve into a potent snowmaker. The GFS model is calling for Larry to dump around 20 gigatonnes of snow in three days across southeast Greenland. That would be roughly 3% of a typical year’s worth of snow for the entire Greenland ice sheet, based on 1981-2010 data."

https://yaleclimateconnections.org/2021/09/peak-tropics-two-noteworthy-landfalls-and-four-other-areas-to-watch/

[NotaDenier]

https://www.mtpr.org/2021-09-12/greenland-pummeled-by-snow-one-month-after-its-summit-saw-rain-for-the-first-time

Just a month after rainfall was recorded for the first time ever at Greenland's highest point, the island is expecting up to four feet of snow from the remnants of Hurricane Larry — the rare tropical storm to stay intact so far north.

Hurricane-force gusts topped 100 miles per hour at Kulusuk Airport near Greenland's southeast coast. At Tasiilaq, the largest town in the region, sustained winds reached 55 miles per hour, with gusts of over 90.

The snow reached blizzard conditions at Summit Camp, a weather station at the island's highest point more than 10,000 feet above sea level, with winds and snow so heavy that visibility was minimal.

[gerontocrat]

Larry certainly did a dump on Greenland yesterday - a 9.6 GT SMB gain for the day.

And Larry hasn't finished yet ( see last image)

[gerontocrat]

ps:

Larry even made a blip on Nico Sun's Snow Cover Extent graph and anomaly map

[gerontocrat]

Larry did another dump on Greenland yesterday - a 7.7 GT SMB gain for the day following the previous day's 9.6 GT SMB gain.

And Larry hasn't finished yet ( see last image)

And in later days probably more lows coming from the South up the Greenland Sea.

[gerontocrat]

Larry did a final dump on Greenland yesterday - a 3.4 GT SMB gain for the day following the previous days' 7.7 GT  & 9.6 GT SMB gains, i.e. 20.7 GT SMB gain over the 3 days.

And in days to come probably more lows coming from the South up the Greenland Sea.

[gerontocrat]

Since Larry went away, things have quietened down. The legacy of Larry is above average SMB gain to date, especially on the coastal regions of the East.