Setup Pointer to the main array which stores gradient all variables with x, y, z
subroutine setup_lctm2015_grad()
!< Setup Pointer to the main array which stores gradient
!< all variables with x, y, z
implicit none
DebugCall('setup_sst_grad')
select case(trim(transition))
case('lctm2015')
gradtgm_x(0:imx, 0:jmx, 0:kmx) => gradqp_x(:, :, :, n_grad)
gradtgm_y(0:imx, 0:jmx, 0:kmx) => gradqp_y(:, :, :, n_grad)
gradtgm_z(0:imx, 0:jmx, 0:kmx) => gradqp_z(:, :, :, n_grad)
case( 'bc', 'none')
!do nothing
continue
case DEFAULT
Fatal_error
end Select
end subroutine setup_lctm2015_grad