SUPERDROPS

Copyright (c) 2025 MPI-M, Clara Bayley

—– CLEO —– File: superdrops.py Project: sdmout_src Created Date: Thursday 29th May 2025 Author: Clara Bayley (CB) Additional Contributors: —– License: BSD 3-Clause “New” or “Revised” License https://opensource.org/licenses/BSD-3-Clause —– File Description: python class(es) to handle superdroplet attributes data from SDM zarr store in ragged array format. Non-compatible update on supersdata and sdtracing modules

class cleopy.sdmout_src.superdrops.SuperdropProperties(consts: dict, is_print=False)

Contains attributes common to all superdroplets and functions for calculating derived ones

m_water(r, msol)

mass of only water in droplet [g]

mass(r, msol)

total mass of droplet (water + (dry) areosol) [g], m = 4/3*pi*rho_l**3 + msol(1-rho_l/rho_sol) ie. m = 4/3*pi*rhoeff*R**3

rhoeff(r, msol)

calculates effective density [g m^-3] of droplet such that mass_droplet, m = 4/3*pi*r^3 * rhoeff taking into account mass of liquid and mass of solute assuming solute occupies volume it would given its (dry) density, RHO_SOL.

vol(r)

volume of droplet [m^3]

class cleopy.sdmout_src.superdrops.Superdrops(dataset, consts=None, is_print=False)

tryunits(ds: Dataset, var: str)

attempts to return the units of a variable in xarray dataset ‘ds’. If attempt fails, returns null

tryvar(ds: Dataset, raggedcount: DataArray, var: str)

attempts to return variable in form of ragged array (ak.Array) with dims [time, raggedcount] for a variable “var” in xarray dataset ‘ds’. If attempt fails, returns empty array instead