gcpy.constants

Contains definitions of physical and chemical constants, as well as other needed global variables.

Notes

Physical constant definitions are taken from NIST, 2014.

Module Attributes

`AVOGADRO`	Avogadro's number [mol-1]
`BOLTZ`	Boltzmann's constant [J/K]
`G`	Acceleration due to gravity [m s-2]
`R_EARTH_m`	"Equal area" radius of the Earth [km] and [m] "Gives the correct total surface area when modeled as a sphere
`MW_AIR_g`	Typical molar mass of air [g mol-1]
`MW_AIR_kg`	Typical molar mass of air [kg mol-1]
`MW_H2O_kg`	Molar mass of water [kg mol-1]
`RD`	Gas constant in dry air [J/K/kg]
`RSTARG`	Molar gas constant [J/K/mol]
`RV`	Gas constant for water vapor [J/K/kg]
`SKIP_THESE_VARS`	netCDF variables that we should skip reading (these are from cubed-sphere data sets)
`TABLE_WIDTH`	Width for emissions & mass tables
`COL_WIDTH`	Column width for emissions & mass tables
`ENCODING`	Default encoding for file I/O
`GLOBAL_LL_EXTENT`	Default global lat/lon extent
`NO_STRETCH_SG_STRETCH_FACTOR`	Default cubed-sphere tretched-grid stretch factor (i.e. no stretching).
`NO_STRETCH_SG_TARGET_LON`	Default cubed-sphere stretched-grid target longitude (i.e. no stretching).
`NO_STRETCH_SG_TARGET_LAT`	Default cubed-sphere stretched-grid target latitude (i.e. no stretching).
`NO_STRETCH_SG_PARAMS`	Default stretched-grid parameters list (stretch factor, target lon, target lat)

gcpy.constants.R_EARTH_m = 6371007.2: “Equal area” radius of the Earth [km] and [m] “Gives the correct total surface area when modeled as a sphere

gcpy.constants.SKIP_THESE_VARS = ['anchor', 'ncontact', 'orientation', 'contacts', 'cubed_sphere']: netCDF variables that we should skip reading (these are from cubed-sphere data sets)

gcpy.constants.GLOBAL_LL_EXTENT = [-180, 180, -90, 90]: Default global lat/lon extent

gcpy.constants.NO_STRETCH_SG_STRETCH_FACTOR = 1: Default cubed-sphere tretched-grid stretch factor (i.e. no stretching)

gcpy.constants.NO_STRETCH_SG_TARGET_LON = 170: Default cubed-sphere stretched-grid target longitude (i.e. no stretching)

gcpy.constants.NO_STRETCH_SG_TARGET_LAT = -90: Default cubed-sphere stretched-grid target latitude (i.e. no stretching)

gcpy.constants.NO_STRETCH_SG_PARAMS = [1, 170, -90]: Default stretched-grid parameters list (stretch factor, target lon, target lat)