[Liwg-core] melt bias in 126

Miren Vizcaino M.Vizcaino at tudelft.nl
Fri Jan 13 10:07:59 MST 2017

Thank you, Marcus.
I suppose this implies that we need to closely monitor Greenland climate in the ongoing 126?

Sent from my iPhone

On 13 Jan 2017, at 17:44, Marcus Löfverström <marcusl at ucar.edu<mailto:marcusl at ucar.edu>> wrote:

Hi Miren,

a part of the problem is likely the changes in subgrid topography in Greenland. Here is a snippet from an email from Julio to the CESM developers:

"126 with enhanced surface roughness around Greenland could be colder in the Labrador sea.  Marcus L. has seen cooling there in our F2000 cases. Let's see what it does to Lab sea ice."

My understanding is that the Lab Sea is still behaving fairly well in the B-case they are currently running. Note, however, that this assessment is only based on a few decades worth of data so it could change in a longer simulation.

// Marcus

On Fri, Jan 13, 2017 at 9:23 AM, Miren Vizcaino <M.Vizcaino at tudelft.nl<mailto:M.Vizcaino at tudelft.nl>> wrote:
dear all,

Unfortunately I missed the Wednesday telecom and I missed also the melt problem, that came to me as a surprise today

Jan: "Due to the latest CAM changes, the SST’s have cooled quite a bit in the North Atlantic, and this made Greenland cooler as well, and reducing melt significantly".

do we know exactly the sources of the cold bias, and is this substantially affecting other regions (e.g. Arctic sea ice?)? are others out of the LIWG aware/concerned about the cold SSTs ?

thanks, cheers, miren

Liwg-core mailing list
Liwg-core at cgd.ucar.edu<mailto:Liwg-core at cgd.ucar.edu>

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

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