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The lunar atmospheric tide at Melbourne 1869–1892, 1900–1914
Author(s) -
Chapman S.,
Hardman M.,
Miller J. C. P.
Publication year - 1936
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.49706226709
Subject(s) - variation (astronomy) , atmospheric tide , quiet , environmental science , climatology , atmospheric sciences , atmospheric pressure , meteorology , geography , geology , physics , ionosphere , thermosphere , quantum mechanics , geophysics , astrophysics
The lunar atmospheric tide a t Melbourne, Australia, has been determined from nearly 36 years' record; the mean result is 28 sin (2t +84.0°) microbars, with a probable error of 2.3 microbars. This is compared with the determination made by Neumayer from data for the years 1858‐63: his result is found to be affected by so large a probable error as to be practically without value. The Melbourne tide is affected by a seasonal variation, of normal type as regards phase (high tide occurring later in December than in June), but abnormal in that the amplitude is greatest in December. The solar daily variation a t Melbourne is also analysed, as determined from all or almost all days, and separately from 421 days of barometric disturbance; the latter show the expected “concave variation,” the complement of Bartels' “convex variation” characteristic of barometrically “quiet” days.