MOSAIK/PALM-4U simulation status and results

First building-resolving large-eddy simulations for entire Berlin

Presentation at ICUC10, New York City, August 2018

Validation runs

VDI 3783 Part 9

Status message: completed

Description	Date of issue	Closing date
Validation completed	23/07/2019	23/07/2019

Validation protocol and details: ​here

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Run 01 (VALM01): Winter 2017 Berlin, Jan 17 06:00 UTC - Jan 18 06:00

Status message: debugging

Description	Date of issue	Closing date	Further remarks
Start of VALM01 testing	01/01/2019
	...	...
Crash in nested runs.	April-May	...	Smaller test simulations run well.
Bug in radiation in a nested run	21/05/2019	22/05/2019
	...	...
Fix numerical issues that lead to unrealistic concentrations of chemical compounds in case of (offline) nesting.	July	end of July
Memory demand for calculation of view factors (radiative transfer)	01/08/2019	03/08/2019	OOM killer aborted processes randomly. Using not all cores on node fixed this.
Parent and child grids do not overlap (required after revision of the nesting)	05/08/2019	05/08/2019	New child drivers are required as number of grid points changed.
Driver problem with bridges at the boundary.	05/08/2019	05/08/2019	Child was moved a few meter northward.
Bug in building parameters, wrong dimension in static input file	08/08/2019	08/08/2019
Bug when green roofs are present.	09/08/2019	10/10/2019	Green roofs where disabled in the simulation. Fixed now.
MPI network problems on the cray machine in Berlin	10/08/2019	19/8/2019	Recurring MPI failures at different locations in the code, appeared only in the large winter IOP simulations, not in smaller ones. As a consequence, all runs were carried-out on the Atos machine in Göttingen.
Minor bug in new implementation of external radiative forcing	21/08/2019	21/08/2019
Failure due to MPI errors.	05/09/2019	21/09/2019	Appeared also in smaller test simulations. Need to be fixed on HLRN side.
Emission module caused model crash	23/09/2019	27/09/2019
MPI error just at the beginning of the run - HLRN internal problem: ofi fabric is not available ...	24/09/2019	?	Error does not appear any more.
Crashed with error message corrupted double-linked list	01/10/2019	07/10/2019	Seems that scheduling is not working properly, had been queued for 4 days!!! Further debug messages implemented to narrow down the location. Message comes from the parent domain. However, memory consuming sky-view factors were calculated.
Crashed with An allocatable array is already allocated	09/10/2019	10/10/2019
Crashed by an MPI error	13/10/2019		Parent finished initialization. Crashes in a MPI_ALLGATHER call in surface_data_output_init. Might be connected to the HLRN-network problem (14/10/2019).
Crashed again with error message corrupted double-linked list in child simulation.	17/10/2019		Parent finished initialization. Crashes again in surface_data_output_init. Next step: switch-off surface-data output as this has no priority at the moment. Note, due to limited resources on HLRN site, the queuing times are quite long for simulations, sometimes several days.
Crashed with Floating divide by zero	23/10/2019		Error seems to be raised within routine drydepo_aero_zhang_vd. Error occurs after time stepping started (initialization finished). Further debugging for this error is ongoing.
Start child-only simulation	23/10/2019		Due to continuous errors within the nested simulation, a non-nested (child-only) simulation is started to get first results for evaluation. Simulation is still running (06/11/2019).
Finished child-only simulation	27/11/2019		Simulation crashed at 11:57:34.95UTC with input/output error. Data up to that point is saved.

(note that the list of past bugfixes will be updated soon)

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Run 02 (VALM02): Summer 2018 Berlin, Jul 16 06:00 UTC - Jul 18 06:00

Status message: unscheduled

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Run 03 (VALM03): Winter 2017 Stuttgart, Feb 14 06:00 UTC - Feb 16 06:00

Status message: unscheduled

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Run 04 (VALM04): Winter 2017 Berlin, Jul 08 04:00 UTC - Jul 09 19:00

Status message: unscheduled

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Run 05 (VALM05): Hamburg, Wind tunnel

Status message: completed

Description	Date of issue	Closing date
Production run	18/04/2019	29/04/2019

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Run 06 (VALM06): Summer 2017 Berlin, Jul 30 06:00 UTC - Aug 01 06:00

Status message: unscheduled