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Author Topic: Greenland 2019-20 SMB (Snowfall & Melting) Year  (Read 15933 times)

gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #100 on: May 18, 2020, 12:43:18 PM »
http://polarportal.dk/en/greenland/surface-conditions/ 17th May

A small SMB daily loss.

The SMB today image shows that it was a combination of low precipitation (blue), sublimation (pink), and the relatively small amount of run-off (red (& pink?)) that resulted from surface melt.

« Last Edit: May 18, 2020, 12:53:45 PM by gerontocrat »
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gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #101 on: May 20, 2020, 09:09:18 AM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/


Minuscule SMB losses in the last 4 days, the result of some melt + very low precipitation.
Accumulated SMB gain this year at 500GT is about 50GT below the average.

Modest precipitation and modest melt look set to continue to the end of the month.
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #102 on: May 20, 2020, 10:13:20 AM »
& attached is the graph that shows that if SMB gain has peaked, it has peaked about 2 weeks early & somewhere between 50 to 75 GT less than average.
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #103 on: May 21, 2020, 09:13:26 AM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/


Data as at 20th May 2020

Minuscule SMB losses in the last 5 days, the result of some melt + very low precipitation.
Accumulated SMB gain this year at 500GT is about 75GT below the average.

Modest precipitation and modest melt look set to continue to the end of the month.

If the SMB gain for this year has peaked at just almost 500GT, it is about 3 weeks early and nearly 100 GT below the average of nearly 600GT.
__________________________________
ps:- I have written to DMI & requested they download the average SMB & Melt daily data. I am hopeful for a +ve result next week
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gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #104 on: May 23, 2020, 08:30:26 AM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/

Data as at 22 May 2020


I didn't see this sort of melt coming at all. A large area of melt but an SMB gain. If you compare the daily SMB and melt maps you can see..
- In the West & North insolation causing both sublimation (inland)and run-off (coastal).
- in the SouthWest melt is associated with precipitation - but as  rain.

It is a reminder that at lower altitudes precipitation during the warmer months is likely to be a mixture of snow and rain.
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"Para a Causa do Povo a Luta Continua!"
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Stephan

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #105 on: May 23, 2020, 08:47:06 AM »
- in the SouthWest melt is associated with precipitation - but as  rain.
Wet and not so warm times are expected in S Grønland. Forecast for Narsarsuaq for May 23 - June 05, 2020.
It is too late just to be concerned about Climate Change

gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #106 on: May 28, 2020, 10:41:18 AM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/

Data as at 27 May 2020
SMB cumulative gain still dithering around the current max of 500 GT

The very large melt on 22nd May did not happen - DMI revised the data.

You can see from the maps where at lower altitudes precipitation during the warmer months is likely to be a mixture of snow and rain.

No significant acceleration in melt likely in the next 5 days - but after that GFS says maybe.
Ditto for precipitation.
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Stephan

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #107 on: May 28, 2020, 05:45:30 PM »
Melting season makes a little pause as Freya Gletscher Webcam shows (May 26)
It is too late just to be concerned about Climate Change

gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #108 on: June 02, 2020, 02:44:19 PM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/
http://ensemblesrt3.dmi.dk/data/prudence/temp/PLA/PP_GSMB/

Data as at 1 June 2020

SMB cumulative up by 5GT since the last posting.
SMB loss of 0.4GT on this day - low oprecip+average melt.

Looks like high afternoon temperatures will generate a significant melt in the next 3 days or so, but moderating after that.
__________________________________
« Last Edit: June 02, 2020, 02:57:11 PM by gerontocrat »
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gerontocrat

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Re: Greenland 2019-20 SMB (Snowfall & Melting) Year
« Reply #109 on: Today at 12:52:23 PM »
Data from...
http://polarportal.dk/en/greenland/surface-conditions/

Data as at 2 June 2020

High precipitation greater than above average melt = SMB gain

Note that in the south much precipitation falling as rain but mostly not resulting in run-off

Looks like even higher afternoon temperatures will generate a significant melt in the next 3 days or so, but moderating after that.

Also in the south - rain. If that persists increased run-off to be the result?
__________________________________
[/quote]
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)