earthkit.meteo.constants
========================

.. py:module:: earthkit.meteo.constants


Attributes
----------

.. autoapisummary::

   earthkit.meteo.constants.Lv
   earthkit.meteo.constants.R
   earthkit.meteo.constants.R_earth
   earthkit.meteo.constants.Rd
   earthkit.meteo.constants.Rv
   earthkit.meteo.constants.T0
   earthkit.meteo.constants.c_pd
   earthkit.meteo.constants.c_pv
   earthkit.meteo.constants.degree
   earthkit.meteo.constants.epsilon
   earthkit.meteo.constants.g
   earthkit.meteo.constants.kappa
   earthkit.meteo.constants.omega
   earthkit.meteo.constants.p0
   earthkit.meteo.constants.radian
   earthkit.meteo.constants.sideral_day
   earthkit.meteo.constants.sideral_year
   earthkit.meteo.constants.solar_day


Package Contents
----------------

.. py:data:: Lv
   :value: 2500800.0


   Latent heat of vapourisation [:math:`J kg^{-1}`].

.. py:data:: R
   :value: 8.31451


   Universal gas constant [:math:`J K^{-1} mol^{-1}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: R_earth
   :value: 6371229


   Average radius of the Earth [:math:`m`]. See [IFS-CY47R3-PhysicalProcesses]_
   (Chapter 12).

.. py:data:: Rd
   :value: 287.0597


   Gas constant for dry air [:math:`J kg^{-1} K^{-1}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: Rv
   :value: 461.51


   Gas constant for water vapour [:math:`J kg^{-1} K^{-1}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: T0
   :value: 273.16


   Triple point of water [K].

.. py:data:: c_pd
   :value: 1004.79


   Specific heat of dry air on constant pressure [:math:`J kg^{-1} K^{-1}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: c_pv
   :value: 1846.1


   Specific heat of water vapour on constant pressure [:math:`J kg^{-1} K^{-1}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: degree

   Factor for converting radians to degrees.

.. py:data:: epsilon
   :value: 0.621981


   Epsilon coefficient used in humidity formulas :math:`\epsilon = \frac{R_{d}}{R_{v}}`.

.. py:data:: g
   :value: 9.80665


   Gravitational acceleration on the surface of the Earth [:math:`m s^{-2}`].
   See [IFS-CY47R3-PhysicalProcesses]_ (Chapter 12).

.. py:data:: kappa
   :value: 0.285691


   Kappa coefficient used in adiabatic equations :math:`\kappa = \frac{R_{d}}{C_{pd}}`.

.. py:data:: omega

   Rotation rate of the Earth [:math:`s^{-1}`].
   Defined as :math:`\frac{2\pi}{sideral\_day}`.

.. py:data:: p0
   :value: 100000.0


   Reference pressure used in potential temperature calculations [Pa].

.. py:data:: radian

   Factor for converting degrees to radians.

.. py:data:: sideral_day

   Length of the sideral day [:math:`s`].
   Defined as :math:`\frac{solar\_day}{1 + \frac{solar\_day}{sideral\_year}}`.

.. py:data:: sideral_year

   Length of the sideral year [:math:`s`].
   Defined as :math:`\frac{2\pi\times 365.25\times solar\_day}{6.283076}`.

.. py:data:: solar_day
   :value: 86400


   Length of the solar day [:math:`s`].