earthkit.meteo.thermo.array.relative_humidity_from_dewpoint
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.. py:function:: earthkit.meteo.thermo.array.relative_humidity_from_dewpoint(t, td)

   Compute the relative humidity from dewpoint temperature.

   :param t: Temperature (K)
   :type t: :class:`array-like`
   :param td: Dewpoint (K)
   :type td: :class:`array-like`

   :returns: Relative humidity (%)
   :rtype: :class:`array-like`

   The computation is based on the following formula:

   .. math::

       r = 100 \frac {e_{wsat}(td)}{e_{wsat}(t)}

   where :math:`e_{wsat}` is the :func:`saturation_vapour_pressure` over water.