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Point discharge from natural and artificial points (Pt. II)
Author(s) -
Milner J. W.,
Chalmers J. Alan
Publication year - 1961
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49708737413
Subject(s) - current (fluid) , point (geometry) , potential gradient , wind speed , tree (set theory) , meteorology , mechanics , mathematics , physics , geometry , mathematical analysis , thermodynamics , quantum mechanics
Measurements have been made of the point‐discharge current through an artificial point at about tree‐top height, the potential gradient at the ground nearby and the wind speed. The results are similar in form to those for an isolated point at greater height and do not show the square‐law relation between current and potential gradient that has previously been found when wind‐speed has not been taken into account. The current flowing down a living tree has also been measured and obeys a similar relation with potential gradient.