Dear Weng,
First of all, as this deals Atmlab, please send future questions instead
to atmlab_dev...@lists.uni-hamburg.de.
If r is constant, you only need to modify C.PND_FIELD{1} to make sure
that the IWC at each pressure level fits with what you want. Including
to set C.PND_FIELD{1} to zero wjhere IWC shall be 0.
If you change the position and/or thickness of the cloud, make sure that
C.LIMITS cover the cloud layer(s) with some margin, particularly below it.
If the calculations involve several r, there should be one element in
both C.SCAT_DATA and C.PND_FIELD for each r involved.
Please note that there has been some improvements of DOIT during the
last years. These are only present in the v2.3 version. And I don't
think all new features are covered by the standard functionality in
Atmlab. I have no time to update Atmlab. So maybe you should consider
using ARTS directly.
Regards,
Patrick
On 2019-01-09 11:57, WCS wrote:
Dear All,
Hello, sorry to bother you. I have one question about the
simulation of inhomogeneous cloud using DOIT.
There are two demos about scattering in Atmlab,
qarts_mcdoit_demo.m and qarts_scattering_demo.m.Suppose the cloud is
homogeneous, the ice water content at the top and the bottom of the
cloud is same, scattering properties and particle number density are
calculated by
C.SCAT_DATA{1} = mie_arts_scat_data( Q.F_GRID, T_grid, rfr_index, theta,
r );
C.PND_FIELD{1} = box_pnd_mono_size_1d( alt, iwc, r );
Now if the cloud is inhomogeneous, the altitude isdivided into many
grids, now I know the radius ‘r’ and ice water content ‘iwc’ at each
grid. So, should I divide the inhomogeneous cloud into many homogeneous
clouds? And how should I specify the altitude of the top and bottom of
eachhomogeneous cloud?
Best wishes!
yours,
Weng
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