Read SST, interpolate in time

INTERFACE:

    subroutine read_sst(jul,secs,sst)

DESCRIPTION:

For calc_fluxes=.false., this routine reads sea surface temperature (SST) from sst_file and interpolates in time.

USES:

    IMPLICIT NONE

INPUT PARAMETERS:

    integer, intent(in)                 :: jul,secs

OUTPUT PARAMETERS:

    REALTYPE,intent(out)                :: sst

REVISION HISTORY:

    Original author(s): Karsten Bolding
    See log for airsea module