A line on a map connecting points having equal incidence of a specified meteorological feature.
- ‘Illustration of instantaneous irradiance or cumulative radiant exposure is achieved using a false-color rendering-mapping light intensity to color-creating irradiance or exposure isopleths.’
- ‘The scene observed in false color illustrates the incident light pattern so explicitly as to delineate irradiance isopleths.’
- ‘Only later did I realize that my success was due to the fact that I presented my results in classical ‘Margarian’ style, including isopleths and mathematical formulas.’
- ‘The profiles could result from garnet growth parallel to Fe-Mg isopleths.’
- ‘The rapid rates of migration of trees, evident in the pollen isopleths, remain unexplained.’
Early 20th century: from Greek isoplēthēs equal in quantity from isos equal + plēthos multitude, quantity.
We take a look at several popular, though confusing, punctuation marks.