merra_smb_harmonics.py

  • Reads monthly MERRA-2 surface mass balance anomalies and converts to spherical harmonic coefficients [29]

Source code

Calling Sequence

usage: merra_smb_harmonics.py [-h] [--directory DIRECTORY] [--mean START END]
                              [--year YEAR [YEAR ...]] [--region REGION]
                              [--mask MASK [MASK ...]] [--lmax LMAX]
                              [--mmax MMAX] [--love {0,1,2,3,4}]
                              [--reference {CF,CM,CE}]
                              [--format {ascii,netCDF4,HDF5}] [--verbose]
                              [--mode MODE]
                              {SMB,ACCUM,PRECIP,RAINFALL,SUBLIM,RUNOFF} [{SMB,ACCUM,PRECIP,RAINFALL,SUBLIM,RUNOFF} ...]

Positional Arguments

product

Possible choices: SMB, ACCUM, PRECIP, RAINFALL, SUBLIM, RUNOFF

MERRA-2 derived product

  • 'SMB': Surface Mass Balance

  • 'ACCUM': Snowfall accumulation

  • 'PRECIP': Total Precipitation

  • 'RAINFALL': Total Rainfall

  • 'SUBLIM': Evaporation and Sublimation

  • 'RUNOFF': Meltwater Runoff

Named Arguments

--directory, -D

Working data directory

--mean

Start and end year range for mean

--year, -Y

Years of model outputs to run

--region, -R

Region name for subdirectory

--mask

netCDF4 masks file for reducing to regions

--lmax, -l

Maximum spherical harmonic degree

--mmax, -m

Maximum spherical harmonic order

--love, -n

Possible choices: 0, 1, 2, 3, 4

Treatment of the Load Love numbers

  • 0: Han and Wahr (1995) values from PREM [8]

  • 1: Gegout (2005) values from PREM [6]

  • 2: Wang et al. (2012) values from PREM [30]

  • 3: Wang et al. (2012) values from PREM with hard sediment [30]

  • 4: Wang et al. (2012) values from PREM with soft sediment [30]

--reference

Possible choices: CF, CM, CE

Reference frame for load Love numbers

  • 'CF': Center of Surface Figure

  • 'CM': Center of Mass of Earth System

  • 'CE': Center of Mass of Solid Earth

--format, -F

Possible choices: ascii, netCDF4, HDF5

Input and output data format

--verbose, -V

Verbose output of processing run

--mode, -M

Permission mode of directories and files