SAMBA conversion thoughts

SAMBA (Upper_Abyssal_Transport_Anomalies.txt) has two main variables which are (TIME,), named ‘upper-cell volume transport anomaly’ which suggests a quantity TRANSPORT_ANOMALY (N_LEVELS, TIME), where we would then have again a DEPTH_BOUND (N_LEVELS, 2).

But the other SAMBA product (MOC_TotalAnomaly_and_constituents.asc) also has a “Total MOC anomaly” (MOC), a “Relative (density gradient) contribution” which is like MOVE’s internal or RAPID’s interior. There is a “Reference (bottom pressure gradient) contribution” which is like MOVE’s offset or RAPID’s compensation. An Ekman (all have this–will need an attribute with the source of the wind fields used), and also a separate “Western density contribution” and “Eastern density contribution” which are not available in the RAPID project, and are not the same idea as the OSNAP west and OSNAP east, but could suggest an (N_PROF``=2, ``TIME) for west and east.

Potential reformats:

• Overturning:

  • MOC: time series (dimension: TIME)

Note: Check the readme to see what the relationship is between the upper, abyssal and MOC transports.

• Component transports:

  • Dimensions: TIME, N_COMPONENT (1404, 7)

  • Coordinates: LATITUDE, LONGITUDE_BOUNDS (scalar, x2), TIME in datetime. N_COMPONENT for the number of components.

  • Variables: TRANSPORT (TIME, N_COMPONENT) - This would also have TRANSPORT_NAME (N_COMPONENT, string) to indicate what the component is (e.g. RELATIVE_MOC, BAROTROPIC_MOC, EKMAN, WESTERN_DENSITY, etc).

Note: It would be good to verify how these components should (or shouldn’t) add up to the total transports.