[Liwg-core] Good news: realistic GrIS ablation!; and next telecom

Miren Vizcaino M.Vizcaino at tudelft.nl
Tue Mar 14 11:13:50 MDT 2017


I can at that time too
Miren

Sent from my iPhone

On 14 Mar 2017, at 17:11, Bette Otto-Bliesner <ottobli at ucar.edu<mailto:ottobli at ucar.edu>> wrote:

Me also

On Tue, Mar 14, 2017 at 11:07 AM, Marcus Lofverstrom <marcusl at ucar.edu<mailto:marcusl at ucar.edu>> wrote:
Should work for me too.

// Marcus

On Tue, Mar 14, 2017 at 9:59 AM, Jeremy Fyke <garmeson.lanl at gmail.com<mailto:garmeson.lanl at gmail.com>> wrote:
I can do Wednesday 9-10MDT too (and *will* be there).

Jer


On Tue, Mar 14, 2017 at 7:18 AM, Kampenhout, L. van (Leo) <L.vanKampenhout at uu.nl<mailto:L.vanKampenhout at uu.nl>> wrote:
Hi all,

I’m also available between 4 - 5 PM CET, which is the proposal if I’m not mistaken (9-10 am MDT).


Leo


On 13 Mar 2017, at 16:59, Lipscomb, William Henry <lipscomb at lanl.gov<mailto:lipscomb at lanl.gov>> wrote:

Hi Miren,

I agree—this looks great.  Many thanks to everyone who’s been working on these simulations.  Please keep us posted as the run gets closer to equilibrium.

I could make a telecon on Wednesday at 9 MDT.  Please note that the U.S. moved to daylight time this past weekend, but Europe hasn’t sprung forward yet.  So the current time difference between Europe and Mountain is 7 hours (instead of the usual 8).

Thanks,

Bill L.



On Mar 10, 2017, at 12:31 PM, Miren Vizcaino <M.Vizcaino at tudelft.nl<mailto:M.Vizcaino at tudelft.nl>> wrote:

Hi Jer

Downscaled SMB is included in the figure I sent.

Maximum snow depth is 10 m w.e. for GrIS. This means that we the snow/firn pack needs many years for equilibrium, so we need a spin-up strategy that can be acceptable for the CLM folks as well. We have run only 7 years so far. We need to run further to get an idea of the equilibrium snow/firn thickness distribution per elevation class per grid cell. If this becomes clear early in the simulation, we could implement something in the line proposed by Bill Sacks during the Winter Meeting. But first we need to run more years to understand the dynamics towards equilibrium.

Thanks, Miren


On Mar 10, 2017, at 5:10 PM, Jeremy Fyke wrote:

Hey all,

Thanks for update, Miren!  A few follow-up questions:
-what maximum snow depth are you using here?
-what does downscaled SMB look like (which is ultimately what the ice sheet will see)?

Jer

On Fri, Mar 10, 2017 at 8:59 AM, Lenaerts, J.T.M. (Jan) <j.lenaerts at uu.nl<mailto:j.lenaerts at uu.nl>> wrote:
Hi Miren (and Raymond),

Thanks for the message and all the work. This looks great and is consistent with what we saw earlier, with the additional improvement of the Northern Greenland bias with your suggested initialisation. I am really curious how this will look in the 20th century!

I cannot make it next Wednesday but I am happy to discuss with Leo and/or you beforehand.

All the best,

Jan



On 10 Mar 2017, at 14:29, Miren Vizcaino <M.Vizcaino at tudelft.nl<mailto:M.Vizcaino at tudelft.nl>> wrote:

Dear All,

This email contains two messages

1 - Good news. We have tried the new SCF with #134 and snow thickness reset to 1 m w.e. over the GrIS, and now CESM is able to realistically simulate the ablation areas at ALL ice sheet margins, including N and NE (see attached figure)!
The reason for the differences with the “control” #134 presented by Leo at the meeting is that 1 m w.e. is below Wmax = 2 m w.e. The span-up #134 snow/firn cover prevented thick snow/firn columns from ablating.

Congratulations and many thanks to everybody, very specially to Leo the implementation of the SCF and to Raymond for his work on the impact of snow/firn initialization.

2 - I propose to have a telecom next Wednesday, e.g., to discuss how to spin-up the snow/firn pack in time for the official CESM2.0 pre-industrial BG control.

Regards, Miren




<PastedGraphic-2.tiff>_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core

- - - - - - - - - - - - - - - - - - - - - - - - - - -
Jan Lenaerts
IMAU, Utrecht University || University of Colorado
@lenaertsjan<https://twitter.com/lenaertsjan> || website<http://www.colorado.edu/lab/icesheetclimate/>









_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core



_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core

---
William Lipscomb
Los Alamos National Laboratory
Group T-3, MS B216
Los Alamos, NM 87545
505-667-0395<tel:(505)%20667-0395>




_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core


_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core



_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core




--
Marcus Löfverström (PhD)
Post-doctoral researcher
National Center for Atmospheric Research
1850 Table Mesa Dr.
80305 Boulder, CO, USA

https://sites.google.com/site/lofverstrom/

_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core




--
Bette L. Otto-Bliesner
Deputy Director and Senior Scientist
Climate and Global Dynamics Laboratory

National Center for Atmospheric Research
1850 Table Mesa Drive
Boulder, Colorado 80305
Ph:  303-497-1723
Fax: 303-497-1348
Email: ottobli at ucar.edu<mailto:ottobli at ucar.edu>
Web page: http://www.cgd.ucar.edu/ccr/ottobli
_______________________________________________
Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>
http://mailman.cgd.ucar.edu/mailman/listinfo/liwg-core
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cgd.ucar.edu/pipermail/liwg-core/attachments/20170314/2f966068/attachment.html>


More information about the Liwg-core mailing list