minimum number of iterations N_ITER_SSA_MIN (default 1).

If undefined, the default value 1 a = 31556925.445 s
(IUPAC-IUGS year for epoch 2000.0) is used.
Value stored in global variable year2sec (previously a parameter).
New global variable sec2year = 1/year2sec introduced.

If 1 or undefined, compatibility check between horizontal resolution
and number of grid points carried out as before.
If 0, compatibility check not carried out.

Instead, the name of the simulation is extracted directly from the
file name of the run-specs header.
New global variable run_name introduced.
Length of run_name and anfdatname changed from 100 to 256.

and EMTSHELF (modified EISMINT, with rectangular ocean basin,
under XYZ) combined into single domain EISMINT.
Topographies are read from files rather than computed within the
module sico_init_m.

by sico_init routines.

(module calc_thk_m) can optionally be switched off
(parameter OCEAN_CONNECTIVITY==0).
Default is enforcing ocean connectivity as before
(parameter OCEAN_CONNECTIVITY==1 or undefined).

New global variables:
z_sl (2D array), dzsl_dtau (time derivative, 2D array),
z_sl_mean (spatially averaged sea level, scalar).

H (total ice thickness), H_new (updated total ice thickness),
dH_dtau (time derivative).

Paramater NETCDF deleted in main file sicopolis.F90
and all modules.

'maske' -> 'mask', 'neu' -> 'new',
'read_erg_nc' (erg = Ergebnis) -> 'read_tms_nc' (tms = time slice).

Computations for hybrid SIA/SStA schemes streamlined slightly
(divisions avoided etc.).
Writing of log file in sico_init corrected
(only relevent parameters written).

New parameters HYB_MODE and HYB_REF_SPEED now written to
run_name.log files by sico_init subroutines.

Loops `do n=2, n_slide_regions` only attempted to be executed when
at least one execution will take place (i.e., n_slide_regions > 1).

(but so far used only for Antarctica, where it distinguishes between
East Antarctica, West Antarctica and the Antarctic Peninsula).

\!/ Requires updated versions of the input files
nhem80_{prec,temp}mm.dat for the northern hemisphere. They can be
downloaded with the script get_input_files.sh in the main directory
of SICOPOLIS (see Quick Start Manual).

for reading all the required 2D input.

for reading the distributions of the flexural rigidity and the
asthenospheric time lag (parameters for the ELRA model).

for reading the present-day reference topography, reference mask
and maximum-extent mask.

for reading the geothermal heat flux and the region numbers for the
basal sliding law.

ASCII and NetCDF files) now used by all topography1/2/3 subroutines
in the sico_init_m modules.

It marks the computation of the temperature, water content,
age and flow enhancement factor during an integration step.

New global variable ratio_sl (slip ratio on main grid) introduced,
weighted flow enhancement factor computed (required for the
strain-heating term in the temperature/enthalpy calculations).

More preparations: module calc_enhance_m, sico_init_m's,
run-specs headers.

All PATH macros
(IN_PATH, OUT_PATH, optional ANF_DAT_PATH and TARGET_TOPO_PATH)
now passed to the preprocessor via the -D<macro> compiler option
(rather than cumbersomely sed-ing them into the run-specs headers
as before).

New global variable (parameter) year2sec introduced.
Used throughout the code for year-to-second conversions.

Happy New Year commit: Copyright information updated.