4 Glossary

bundle

Several data fields, all of which share the same domain, grouped together in one data structure.

combine

Add together two or more fields that are on the same domain; e.g., latent heat flux plus sensible heat flux on a T42 grid with the same land mask

communication interval

The time interval at which a component model exchanges data with the coupler.

concurrent execution

Running two or more coupled system components at the same time.

domain

Coordinates arrays together with mask, cell area, and processor decomposition information.

grid

Coordinate arrays without a mask, cell area, decomposition information; e.g., a T42 grid.

hybrid parallel

A combination of messaging passing and threading.

map

Regrid; move a data field from one domain to another.

mask

True/false flags associated with a specific grid; e.g., a land mask.

merge

Take two or more fields of the same type (e.g., land, ocean, and ice surface temperatures), which are all on the same domain (e.g., all on a T42 grid, global domain), and the same number of corresponding cell fractions (fraction of land, ocean, and ice, which together sum to unity), and create one field ( e.g., (merged surface temperature) = (ice frac)*(ice T) + (ocn frac)*(ocn T) + (lnd frac)*(lnd T) ).

process split

Time stepping strategy whereby when component models integrate thru a time interval, say [t1,t2], the only data available to the models corresponds to a previous time interval, [t0,t1]; generally associated with concurrent component model execution.

reentrant

A characteristic of a function which can be called concurrently by multiple threads without mishap.

regrid

Map; move a data field from one domain to another.

sequential execution

Running only one coupled system component at a time.

time split

Time stepping strategy whereby when component models integrate thru a time interval, say [t1,t2], the data made available to some models may correspond to the time interval [t1,t2]; generally associated with sequential component model execution.

timestep

A model's internal integration increment in time.