Climatological low-resolution ROMS North Atlantic Simulation

Outline


Motivation
Brief description of the setup
Validation
	Surface currents
	Temperature and Salinity versus climatology
		Slices and cross-sections
		T-S diagrams
Next steps

Motivation


	Test bed for high resolution physical simulation
	To be integrated with COSINE and Calanus models
	Assimilation of climatological Calanus Data

Slide 4

Brief description of the setup.


	Initialized with Levitus 05 January climatology for T and S, and SODA January 1958-2007 mean for velocity and SSH. Southern BC – Levitus 05 monthly climatology for TS, and SODA monthly 1958-2007 mean for velocity and SSH.
	Atmospheric forcing from CORE corrected normal year analysis (obtained from 1958-2004 fields).
	River input is from CORE, it is imposed as surface fresh water input.
	No tidal forcing.
	Sea ice.
	Nudging towards T and S climatology is applied. Scale of T- nudging: 20 days at the surface to 100 days at 1000 m depth; scale of S-nudging: 50 days to 100 days from surface to 1000 m.
	Current run – 6 years. Time step – 0.25 hour.
	All results below are from the sixth year of integration.

Atmospheric forcing


	Air temperature, surface pressure, humidity, wind: 6-hourly
	Shortwave, longwave radiation: daily
	Rain and Snow: monthly
	River runoff: constant

Yearly average of velocity

10 m velocity (ROMS yearly average)

Temperature at 20 m depth

Salinity at 20 m depth

After 6 years of integration (December)

July T-S diagrams

Gulf Stream T-S diagrams

Nova Scotia T-S diagrams

After 6 years of integration (December)

Next Steps


	Adding COSINE (Fei, Julia)
	Adding Calanus Model (Dennis, Julia)
	Development of and adjoint of Calanus Model (Julia, Dennis)
	Climatological studies of COSINE to be compared with interannual runs (Fei, Avijit)
	Assimilation of climatological Calanus Data (Dennis, Julia, Peter)