AMM15: a new high-resolution NEMO configuration for operational simulation of the European north-west shelf (bibtex)
by , , , , , , , , , , ,
Abstract:
This paper describes the next-generation ocean forecast model for the European north-west shelf, which will become the basis of operational forecasts in 2018. This new system will provide a step change in resolution and therefore our ability to represent small-scale processes. The new model has a resolution of 1.5 km compared with a grid spacing of 7 km in the current operational system. AMM15 (Atlantic Margin Model, 1.5 km) is introduced as a new regional configuration of NEMO v3.6. Here we describe the technical details behind this configuration, with modifications appropriate for the new high-resolution domain. Results from a 30-year non-assimilative run using the AMM15 domain demonstrate the ability of this model to represent the mean state and variability of the region. Overall, there is an improvement in the representation of the mean state across the region, suggesting similar improvements may be seen in the future operational system. However, the reduction in seasonal bias is greater off-shelf than on-shelf. In the North Sea, biases are largely unchanged. Since there has been no change to the vertical resolution or parameterization schemes, performance improvements are not expected in regions where stratification is dominated by vertical processes rather than advection. This highlights the fact that increased horizontal resolution will not lead to domain-wide improvements. Further work is needed to target bias reduction across the north-west shelf region.
Reference:
AMM15: a new high-resolution NEMO configuration for operational simulation of the European north-west shelf (J. A. Graham, E. O'Dea, J. Holt, J. Polton, H. T. Hewitt, R. Furner, K. Guihou, A. Brereton, A. Arnold, S. Wakelin, J. M. Castillo Sanchez, C. G. Mayorga Adame), In Geosci. Model Dev., volume 11, 2018.
Bibtex Entry:
@Article{	  graham.ea_2018,
  author	= {Graham, J. A. and O'Dea, E. and Holt, J. and Polton, J.
		  and Hewitt, H. T. and Furner, R. and Guihou, K. and
		  Brereton, A. and Arnold, A. and Wakelin, S. and {Castillo
		  Sanchez}, J. M. and {Mayorga Adame}, C. G.},
  title		= {AMM15: a new high-resolution NEMO configuration for
		  operational simulation of the European north-west shelf},
  journal	= {Geosci. Model Dev.},
  year		= {2018},
  volume	= {11},
  pages		= {681-696},
  abstract	= {This paper describes the next-generation ocean forecast
		  model for the European north-west shelf, which will become
		  the basis of operational forecasts in 2018. This new system
		  will provide a step change in resolution and therefore our
		  ability to represent small-scale processes. The new model
		  has a resolution of 1.5 km compared with a grid spacing of
		  7 km in the current operational system. AMM15 (Atlantic
		  Margin Model, 1.5 km) is introduced as a new regional
		  configuration of NEMO v3.6. Here we describe the technical
		  details behind this configuration, with modifications
		  appropriate for the new high-resolution domain. Results
		  from a 30-year non-assimilative run using the AMM15 domain
		  demonstrate the ability of this model to represent the mean
		  state and variability of the region. Overall, there is an
		  improvement in the representation of the mean state across
		  the region, suggesting similar improvements may be seen in
		  the future operational system. However, the reduction in
		  seasonal bias is greater off-shelf than on-shelf. In the
		  North Sea, biases are largely unchanged. Since there has
		  been no change to the vertical resolution or
		  parameterization schemes, performance improvements are not
		  expected in regions where stratification is dominated by
		  vertical processes rather than advection. This highlights
		  the fact that increased horizontal resolution will not lead
		  to domain-wide improvements. Further work is needed to
		  target bias reduction across the north-west shelf region.},
  doi		= {https://doi.org/10.5194/gmd-11-681-2018},
  file		= {:Graham2018.pdf:PDF},
  groups	= {NWShelf, Met_Office, NEMO, North Sea}
}
Powered by bibtexbrowser