BigleafConstants(;...)

Constants used throughout the Bigleaf.jl Package

Default values can be overridden by the named arguments of the constructor:

• cp : Specific heat of air for constant pressure (J K-1 kg-1)
• Rgas : Universal gas constant (J mol-1 K-1)
• Rv : Gas constant of water vapor (J kg-1 K-1) (Stull 1988 p.641)
• Rd : Gas constant of dry air (J kg-1 K-1) (Foken p. 245)
• Md : Molar mass of dry air (kg mol-1)
• Mw : Molar mass of water vapor (kg mol-1)
• eps : Ratio of the molecular weight of water vapor to dry air (=Mw/Md)
• g : Gravitational acceleration (m s-2)
• solar_constant: Solar constant (W m-2)
• pressure0 : Reference atmospheric pressure at sea level (Pa)
• Tair0 : Reference air temperature (K)
• k : von Karman constant
• Cmol : Molar mass of carbon (kg mol-1)
• Omol : Molar mass of oxygen (kg mol-1)
• H2Omol : Molar mass of water (kg mol-1)
• sigma : Stefan-Boltzmann constant (W m-2 K-4)
• Pr : Prandtl number
• Sc_CO2 : Schmidt number for CO2
• Kelvin : Conversion degree Celsius to Kelvin
• DwDc : Ratio of the molecular diffusivities for water vapor and CO2
• days2seconds : Seconds per day
• kPa2Pa : Conversion kilopascal (kPa) to pascal (Pa)
• Pa2kPa : Conversion pascal (Pa) to kilopascal (kPa)
• umol2mol : Conversion micromole (umol) to mole (mol)
• mol2umol : Conversion mole (mol) to micromole (umol)
• kg2g : Conversion kilogram (kg) to gram (g)
• g2kg : Conversion gram (g) to kilogram (kg)
• kJ2J : Conversion kilojoule (kJ) to joule (J)
• J2kJ : Conversion joule (J) to kilojoule (kJ)
• semedian : Conversion standard error (SE) of the mean to SE of the median (http://influentialpoints.com/Training/standarderrorofmedian.htm)
• frac2percent : Conversion between fraction and percent

Examples

BigleafConstants().g == 9.81
# on the moon change gravity constant to 1/6 that of the earth
BigleafConstants(g = BigleafConstants().g/6).g == 9.81/6