[NorESM-users] NorESM telecon

[Dirk Jan Leo Olivie]

Hi all, this is a small reminder for the noresm telecon tomorrow Wednesday  
March 6, 13:00-14:00. The agenda for the telecon is : - Welcome -  
Presentation by Samar Khatiwala (University of Oxford) : Efficient spin-up  
of Earth System Models using sequence acceleration (abstract at the end of  
this message) - Recent release of NorESM2.1 (if there is time left at the  
end) The zoomlink for the meeting is : https://met-no.zoom.us/j/69166733576  
(ID: 69166733576, passcode: 599550) Best regards, Ada, Alok, Dirk  
Abstract : The ocean and land carbon cycles plays a critical role in the  
climate system and are key components of the Earth System Models (ESMs)  
used to project future changes in the environment. However, their slow  
adjustment time also hinders effective use of ESMs because of the enormous  
computational resources required to integrate them to a pre-industrial  
quasi-equilibrium, a prerequisite for performing any simulations with these  
models and, in particular, identifying the human impact on climate. Here, a  
novel solution to this ``spin-up'' problem, regarded as one of the grand  
challenges in climate science, is shown to accelerate the equilibration of  
state-of-the-art marine biogeochemical models typical of those embedded in  
ESMs by over an order of magnitude. Based on a ``sequence acceleration''  
method originally developed in the context of electronic structure  
problems, the new technique can be applied in a ``black box'' fashion to  
any existing model. Even under the challenging protocols used to spin-up  
ESMs for the IPCC Coupled Model Intercomparison Project, which can take up  
to two years on even some of the most powerful supercomputers, the new  
algorithm can reduce simulation times by a factor of 5, with preliminary  
results suggesting that complex land surface models can be similarly  
accelerated. The ability to efficiently spin-up ESMs would enable for the  
first time a quantification of major parametric uncertainties in these  
models, lead to more accurate estimates of metrics such as climate  
sensitivity, and allow increased model resolution beyond what is currently  
feasible.

NorESM telecon
Wednesday Mar 6, 2024 ⋅ 1pm – 2pm
Central European Time - Oslo

	
Join Zoom Meeting
https://met-no.zoom.us/j/69166733576?pwd=QnR4RE13Z1BHcVVsblBPWE92eGRSZz09
	
Join by phone
(DE) +49 69 50502596
passcode: 599550
(SE) +46 8 505 200 17
passcode: 599550
	
Join using SIP
69166733576 at 109.105.112.236
passcode: 599550

Joining instructions
https://www.google.com/url?q=https://applications.zoom.us/addon/invitation/detail?meetingUuid%3DGNvtS4p6TDKs%252FZvskFubOA%253D%253D%26signature%3Dc60e601e6b022d2a3fe12e498540e77f3a0d6941d54675ce72f4b1311c0128c5%26v%3D1&sa=D&source=calendar&usg=AOvVaw1hbnZU-8FZrFx60poqMIpV
	
Joining notes
Meeting host: dirkjlo at met.no

Join Zoom Meeting:
https://met-no.zoom.us/j/69166733576?pwd=QnR4RE13Z1BHcVVsblBPWE92eGRSZz09


Dear all,

we would like to invite you to a NorESM-telecon on Wednesday March 6th,  
13:00-14:00.

Samar Khatiwala (Oxford University) will give a presentation  
on "Accelerated spinup of Biogeochemistry".

Best regards,
Ada, Alok, Dirk

Organizer
Dirk Jan Leo Olivie
dirkjlo at met.no

Guests
Dirk Jan Leo Olivie - organizer
users at noresm.org
sara.blichner at aces.su.se
ankl at norceresearch.no
jost at norceresearch.no
Steve Goldhaber
Shuang Gao
annica at misu.su.se
jrsc at norceresearch.no
Trond Iversen
Moa Sporre
Lise Seland Graff
Helene Asbjørnsen
Annette Samuelsen
nomatdebol at gmail.com
yanchun.he at nersc.no


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