Met_Office-NEMO team - 2014 actions

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members

Name	Institution	%	Position
Rachel Furner	Met Office	40	NEMO officer
Dave Storkey	Met Office	20	NEMO developer
Enda O'Dea	Met Office	20	NEMO developer
Daley Calvert	Met Office	20	NEMO developer

Summary: List here actions of the institution so as contributions to shared actions

Action		Brief description	Status	Branch name	Trac ticket n°	Wiki page name	Reviewer(s)	Review status	Nb of weeks	Ready for merge If "NO", reason and status for 2015
Met_Office-1		Ice shelf cavities
Met_Office-2		Masked damping
Met_Office-3
Met_Office-4
Met_Office-5
Met_Office-6
Met_Office-7
Met_Office-8
Met_Office-9
Met_Office-10

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Met_Office-1 - Ice Shelf Cavities

Motivation: Include circulation and melting beneath the ice shelves. An ice shelf is a floating extension of an ice sheet that is sandwiched between atmosphere and ocean. Basal melting of ice shelves is one of the main components of the fresh water runoff around Antarctica. Furthermore, this fresh water source is spread between 200m and 1000m depth. The temperature of this water is also much colder than the winter surface water due to the pressure effect on the freezing point temperature (from -1.8°C in surface up to -2.5°C in depth). Consequently, ice shelves lead to large changes in TS properties on the shelf, in sea ice thickness and concentration, in Antarctic bottom water formation, in horizontal circulation as well as in meridional overturning circulation (Hellmer et al., 2004). Modelling ice shelf basal melting is also a required step to build an earth system model including ocean/ice sheet coupling.
Status : Code exists (version 3.4_stable) in BAS and works for regional configuration of Pine Island Glacier and idealised configuration ISOMIP.
Main tasks :

• Validate it for all ice shelves around Antarctica
• Update to latest version
• Clean the code
• Write documentation

Science Reviewer:
System Reviewer:
Deadline: September 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Pierre Mathiot (piethi@…)

Met_Office-2 - Masked damping

Motivation: To allow generic damping in specific regions
Status : Code exists at vn3.4
Main tasks : Module will be developed to damp Temperature & Salinity in any region specified using a mask read in from a netcdf file. The module will be developed outside of the current tradmp module to avoid conflicts with the hard coded resolution dependent regional variations to the damping that are currently implemented in this module. Regional variations to the damping will be permitted by specifying values of the mask between zero and one where zero indicates no damping at that grid point and non-zero values indicate damping with a relaxation coefficient value obtained by multiplying the mask value with a namelist specified max relaxation coefficient.
Science Reviewer:
System Reviewer:
Deadline: September 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Tim Graham (tim.graham@…)

Met_Office-3 - Ensuring CF/MOCF compliance and implementation of CMIP5 diagnostics via XIOS

Motivation: Standardization of output to meet CF and MOCF compliance and addition of CMIP5 diagnostics
Status : Not started
Main tasks : Necessary NEMO-side code modifications where XIOS does not support the required changes (and there are no plans to)
Science Reviewer:
System Reviewer:
Deadline: October 2014 (but depends on CMIP5 and UKMO requirements)
Priority:
Depends on: Feedback from Alistair Sellar (UKMO), Matt Palmer(UKMO) & others
Principal Investigator : Daley Calvert (daley.calvert@…)

Met_Office-4 - Implementation of a kara mixed layer diagnostic

Motivation: Add the Kara et al. variable density criterion MLD diagnostic to allow comparison with their MLD climatology
Status : Has existed in a local UKMO branch for sometime, but needs updating, and retesting
Main tasks : Check the existing code and implement in the appropriate NEMO version
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : Daley Calvert (daley.calvert@…)

Met_Office-5 - Sponge Layer at open boundaries

Motivation: Add the sponge layer (region of increased lateral viscosity) near open boundaries as an option in BDY
Status : Has existed in a local branch for a while
Main tasks : Check the existing code and implement in the appropriate NEMO version
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : Dave Storkey (dave.storkey@…)

Met_Office-6 - Equatorial Pressure correction

Motivation: The pressure correction code exists to maintain balance in equatorial regions as data are assimilated
Status : The code already exits, but still needs to be reviewed
Main tasks : Check the existing code and implement in the appropriate NEMO version
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…)

Met_Office-7 - Seaice increments

Motivation: Implement code used to apply seaice increments; this is used for data assimilation of ice variables. It will also be necessary to make sure the code is compatible with cice
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…)

Met_Office-8 - Temperature Criterion Mixed Layer

Motivation: A new mixed layer definition based on a temperature criterion
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-9 - Observation operator for profiles for use with all vertical coordinates (i.e. generalised vertical interpolation)

Motivation: This code is necessary to get profile minus model differences in any model not using vertical z-coordinates
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-10 - SST bias correction

Motivation: This code reads in a bias field and uses it to correct SST observations before they are passed to the obs operator. It is necessary for successful SST assimilation
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-11 - ADCP data to be included in OBS routines

Motivation: Reads current data from ADCP files for comparison with model data
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-12 - Read and Process gridded seaice and sst data

Motivation: This code would allow us to process gridded SST and seaice data through the observation operator
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-13 -Netcdf4 compression of feedback files

Motivation: This code would allow us to more easily store feedback files at a higher compression
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-14 - Add record information to SLA data

Motivation: Allows storage of record information for SLA data
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : James While (james.while@…)

Met_Office-14 - Addition of Satellite Surface Salinity data and Microwave SST data to OBS routines

Motivation: Allow comparison of satellite surface salinity and microwave SST data through the OBS routines.
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…) (work to be done with Niall McConnell and Jonah Roberts Jones)?

Met_Office-15 - Implement assimilation interface SETTE test

Motivation: Create a SETTE test configuration which includes observation operator and increments tests, to ensure that future NEMO developments do not break OBS and ASM.
Status : Not started
Main tasks :

1. Add some observations and increments to the standard input files.
2. Confirm that the text output will indicate the correct functioning of the OBS and ASM.
3. If not add additional diagnostic text output.

Science Reviewer:
System Reviewer:
Deadline: October 2014 (likely sooner since there is little to do)
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…)

Met_Office-16 - Allow specification of an hour start time

Motivation: NEMO currently assumes runs start at 00 UTC. For the coupled DA work we needed to change the code to start at a specified hour and date.
Status : The code exits in a local branch at vn3.2
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…)

Met_Office-17 - Inclusion of surface wave effects in NEMO

Motivation: Modifying NEMO SBC to include wave-induced mixing and Langmuir circulation with data obtained from a surface wave model and modifying the equation of motion to include Stokes-Coriolis forcing
Status : Not started
Main tasks : NEMO-side code modifications to read/couple wave fields and modifications in the TKE scheme and dynamics module
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Francois-Xavier Bocquet (francois.bocquet@…)

Met_Office-18 -Salinity dependent freezing temperature

Motivation: Implementation of salinity dependent freezing temperature in NEMO which can be passed to sea ice and atmosphere models
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Dave Storkey (dave.storkey@…)

Met_Office-19 - Further 1D configuration changes

Motivation: Add further functionality that there wasn't time for in the 2013 development
Status : Plan exists
Main tasks : Add namelist domain control, case studies, maybe remove CPP key dependence.
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Daley Calvert (daley.calvert@…)

Met_Office-20 - Loosely tidally meaned diagnostics

Motivation: Implementing 25 hour means provides a way of loosely detiding model runs as it largely averages out the main M2 tidal signa. These outputs give a rough idea of the residual flows, mean ssh etc. on a particular day
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Enda O'Dea (enda.odea@…)

Met_Office-21 -

Motivation:
Status : The code exits in a local branch at vn3.2
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Dan Lea (dan.lea@…)

Met_Office-22 -Outputting restarts at specified times instead of specified frequency

Motivation: Operationally we require the flexibility to output restarts at specified times rather than at a specified frequency. This used to be an option in the NEMO trunk but disappeared at v3.0 and we have been maintaining the required code since then. The code uses the nstocklist functionality.
Status : The code exits in a local branch at vn3.4
Main tasks : Check the existing code and implement in the appropriate NEMO version, test and document
Science Reviewer:
System Reviewer:
Deadline: October 2014
Priority: Medium
Depends on: N/A
Principal Investigator : Ed Blockley (ed.blockley@…)