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Questions about semi-Lagrangian tracer transport

Q

qhan@uci_edu

New Member
Which part of the code does the semi-Lagrangian tracer transport in the Eulerian dynamical core? More specificly, which subroutines calculate equations (3.202), (3.203), (3.214), (3.217)-(3.224) in the scientific description of CAM 3.0?

Thanks,
Qin
 
O

olson

Member
The driver routine for semi-Lagrangian transport is "models/atm/cam/src/dynamics/eul/sltb1.F90"
(which is called by "scanslt").

Inside "sltb1":

- "sphdep" is called to compute departure points prior to call to hrintp
- "hrintp" is driver to compute eqn 3.202
- "cubzdr" and "vrtdep" compute vertical departure points prior to vertical interpolation
- "cubzdr" and "limdz" prepare tracer derivatives prior to vertical interpolation as well
- "herzin" is driver to compute eqn 3.203

- "herxin", "heryin" and "herzin" compute eqn 3.214 for each of the x-, y-, and z-directions

- "cubxdr", "cubydr", "cubzdr" compute eqns 3.217-224 for the x-, y-, and z-directions
- misc weights used in some of the above routines are computed in initializing routines such
as "sltini" and "grdini" and in lower level routines found
in"models/atm/cam/src/dynamics/eul/" and "models/atm/cam/src/advection/slt"
 
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