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Workspace Method psdFieldEtAl07
Description
The Field et al. [2007] particle size distribution for snow and
cloud ice.
This is a 1-parameter PSD, i.e. pnd_agenda_input shall have one
column and pnd_agenda_input_names shall contain a single string.
The input data in pnd_agenda_input shall be ice hydrometeor mass
content in unit of [kg/m3]. The naming used is pnd_agenda_input_names
is free but the same name must be used in particle_bulkprop_names and
dpnd_data_dx_names.
psd_size_grid shall contain size in terms of maximum diameter.
Derivatives are obtained by perturbation of 0.1%, but not less than
1e-9 kg/m3.
Both parametrization for tropics and midlatitudes are handled,
governed by setting of *regime*, where "TR" selectes the tropical
case, and "ML" the midlatitude one.
The validity range of mass content is not limited. Negative mass
contents will produce negative psd values following a distribution
given by abs(IWC), ie. abs(psd)=f(abs(IWC)).
If temperature is outside [*t_min*,*t_max*] psd=0 and dpsd=0 if
picky=0, or an error is thrown if picky=1.
For temperatures below *t_min_psd*, the size distribution is
calculated for T = *t_min_psd*. Likewise, for temperatures above
*t_max_psd*, the distribution is derived for T = *t_max_psd*.
Defaults of *t_min_psd* and *t_max_psd* were set considering that
the parametrization has been derived from measurements over
temperatures of -60C to 0C.
Checks of the sanity of the mass-dimension relationship are performed
Errors are thrown if:
- Mass-dimension relation exponent scat_species_b is outside
[*beta_min*, *beta_max*].
Authors: Jana Mendrok
Synopsis
| psdFieldEtAl07( | psd_data, dpsd_data_dx, psd_size_grid, pnd_agenda_input_t, pnd_agenda_input, pnd_agenda_input_names, dpnd_data_dx_names, scat_species_a, scat_species_b, regime, t_min, t_max, t_min_psd, t_max_psd, beta_min, beta_max, picky ) |
Variables