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pcd.yaml
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physical_constants_dictionary:
version_number: 0.0.1
institution: E3SM Project
description: Community-based dictionary for consistent physical constant sets
contact: E3SM Project
set:
- mathematical:
description: "
Common mathematical constants.
"
citation: "
Abramowitz, A., and Stegun, I.A., Handbook of Mathematical Functions
With Formulas, Graphs, and Mathematical Tables, DOC/National Bureau of Standards,
Applied Mathematics Series, 55, June 1964.
"
entries:
- name: pi
value: 3.141592653589793238462643
units: none
prec: double
type: strict
uncertainty: exact
description: "
Ratio of a circle's circumference to its diameter.
"
- name: e
value: 2.718281828459045235360287
units: none
prec: double
type: strict
uncertainty: exact
description: "
Base of natural logarithms.
"
- name: em_gamma
value: 0.577215664901532860606512
units: none
prec: double
type: strict
uncertainty: exact
description: "
Euler-Mascheroni constant.
"
- name: radian
value: 57.295779513082320876798155
units: degree
prec: double
type: strict
uncertainty: exact
description: "
Radian to degrees conversion factor.
"
- name: degree
value: 0.017453292519943295769237
units: rad
prec: double
type: strict
uncertainty: exact
description: "
Degree to radiant conversion factor.
"
- name: square_root_of_2
value: 1.4142135623730950488
units: rad
prec: double
type: strict
uncertainty: exact
description: "
Square root of 2.
"
- name: square_root_of_3
value: 1.7320508075688772935
units: rad
prec: double
type: strict
uncertainty: exact
description: "
Square root of 3.
"
- universal_physical:
description: "
CODATA Recommended Values of the Fundamental Physical Constants: 2014
"
citation: "
Mohr, P.J., Newell, D.B., and Taylor, B.N., J. Phys. Chem. Ref. Data 45,
043102 (2016); doi: 10.1063/1.4954402
"
entries:
- name: speed_of_light_in_vacuum
value: 299792458
units: m s-1
prec: double
type: strict
uncertainty: exact
description: "
The speed at which light propagates in vacuum.
Albert Einstein postulated that the speed of light with respect to
an inertial frame is independent of the motion of the light source.
"
- name: newtonian_gravitation_constant
value: 6.6740831E-11
units: m3 kg-1 s-2
prec: double
type: strict
relative_uncertainty: 4.7E-05
description: "
Empirical constant used to calculate the attractive force between
two bodies according to Newton's law of universal gravitation.
"
- name: standard_acceleration_of_gravity
value: 9.80665
units: m s-2
prec: double
type: strict
uncertainty: exact
description: "
Nominal acceleration of an object in a vacuum at sea level at a
geodetic latitude of 45 degrees.
"
- name: standard_atmosphere
value: 101325
units: Pa
prec: double
type: strict
uncertainty: exact
description: "
Unit of pressure equivalent to 760 mmHg (torr), 29.92 inches Hg and 14.696 psi.
"
- name: avogadro_constant
value: 6.022140857E+23
units: mol-1
prec: double
type: strict
relative_uncertainty: 1.2E-08
description: "
Number of particles (atoms, molecules) in one mole.
"
- name: boltzmann_constant
value: 1.3806485279E-23
units: J K-1
prec: double
type: strict
relative_uncertainty: 5.7E-07
description: "
Proportionality constant between the average kinetic energy
of particles in a gas and its temperature.
"
- name: stefan_boltzmann_constant
value: 5.67036713E-08
units: W m-2 K-4
prec: double
type: strict
relative_uncertainty: 2.3E-06
description: "
Proportionality constant between the power emitted by
a black body and the fourth power of its temperature,
according to Stefan-Boltzmann's law.
"
- name: molar_gas_constant
value: 8.314459848
units: J mol-1 K-1
prec: double
type: strict
relative_uncertainty: 5.7E-07
description: "
Gas constant used in the ideal gas law. It is equivalent to
Boltzmann's constant espressed in J mol-1 K-1.
"
- name: molar_volume_of_ideal_gas
value: 22.71094713E-03
units: m3 mol-1
prec: double
type: strict
relative_uncertainty: 5.7E-07
description: "
Ideal gas molar volume as computed by the ideal gas law (RT/p)
at Standard Temperature and Pressure (STP: 273.15K, 100 kPa).
"
- earth_physical:
description: "
Geodetic Reference System 1980.
"
citation: "
Moritz, H, Geodetic Reference System 1980. J. Geodesy, 74 128-133, 2000.
"
entries:
- name: geocentric_gravitational_constant
value: 3986005E+08
units: m3 s-2
prec: double
type: strict
uncertainty: exact
description: "
Product (GM) of the mass of the Earth (M) and the universal gravitational
constant (G).
"
- name: semimajor_axis
value: 6378137
units: m
prec: double
type: strict
uncertainty: exact
description: "
The semi-major axis of Earth's reference ellipsoid.
"
- name: dynamic_form_factor
value: 108263E-08
units: none
prec: double
type: strict
uncertainty: exact
description: "
Mechanical ellipticity of Earth.
"
- name: angular_velocity
value: 7292115E-11
units: rad s-1
prec: double
type: strict
uncertainty: exact
description: "
Angular velocity of Earth's rotation.
"
- name: semiminor_axis
value: 6356752.3141
units: m
prec: double
type: strict
uncertainty: exact
description: "
The semi-major axis of Earth's reference ellipsoid.
Derived constant.
"
- name: flattening
value: 0.00335281068118
units: none
prec: double
type: strict
uncertainty: exact
description: "
Defined as f = (semimajor_axis - semiminor_axis) / semimajor_axis.
Derived constant.
"
- name: reciprocal_flattening
value: 298.257222101
units: none
prec: double
type: strict
uncertainty: exact
description: "
Defined as 1/f. Derived constant.
"
- name: mean_radius
value: 6371008.7714
units: m
prec: double
type: strict
uncertainty: exact
description: "
Derived constant. Equal to (2 semimajor_axis + semiminor_axis) / 3.
"
- name: radius_of_sphere_of_same_surface
value: 6371007.1810
units: m
prec: double
type: strict
uncertainty: exact
description: "
Radius of Earth's reference sphere with same surface as ellipsoid's.
Derived constant
"
- name: radius_of_sphere_of_same_volume
value: 6371000.7900
units: m
prec: double
type: strict
uncertainty: exact
description: "
Radius of Earth's reference sphere with same volume as ellipsoid's.
Derived constant.
"
- solar:
description: "
NASA Solar Radiation and Climate Experiment (SORCE), Total Irradiance
Monitor (TIM)
"
citation: "
Kopp, G., Lawrence, G., and Rottman, G., The Total Irradiance Monitor (TIM):
Science results, Sol. Phys., 230, 129–139, 2005. doi:10.1007/s11207-005-7433-9.
"
entries:
- name: total_solar_irradiance
value: 1360.8
units: W m-2
prec: double
type: strict
uncertainty: 0.5
description: "
Most probable value of total solar irradiance representative of
solar minimum (aka solar constant).
"
- water:
description: "
International Association for the Properties of Water and Steam (IAPWS).
Thermodynamic Property Formulations 1995 (http://www.iapws.org)
"
citation: "
Wagner, W., and Pruss, A., The IAPWS Formulation 1995 for the Thermodynamic
Properties of Ordinary Water Substance for General and Scientific Use,
J. Phys. Chem. Ref. Data, 31, 387-535, 2002.
"
entries:
- name: water_molar_mass
value: 18.015268
units: g mol-1
prec: double
type: strict
uncertainty: exact
description: "
Molar mass of H2O.
"
- name: water_specific_gas_constant
value: 0.46151805
units: kJ kg-1 K-1
prec: double
type: strict
uncertainty: exact
description: "
Specific gas constant for water vapor.
"
- name: water_triple_point_temperature
value: 273.16
units: K
prec: double
type: strict
uncertainty: exact
description: "
Triple point temperature of H2O.
"
- name: water_triple_point_pressure
value: 611.655
units: Pa
prec: double
type: strict
uncertainty: exact
description: "
Triple point pressure of H2O.
Calculated from Eq. (6.4).
"
- name: liquid_water_triple_point_density
value: 999.793
units: kg m-3
prec: double
type: strict
uncertainty: exact
description: "
Triple point density of liquid H2O.
Calculated from Eq. (6.4).
"
- name: vapor_water_triple_point_density
value: 0.00485458
units: kg m-3
prec: double
type: strict
uncertainty: exact
description: "
Triple point density of vapor H2O.
Calculated from Eq. (6.4).
"