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Climatological annual cycle of upper ocean oxygen content anomaly
Author(s) -
Garcia Hernan E.,
Boyer Tim P.,
Levitus Sydney,
Locarnini Ricardo A.,
Antonov John I.
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021745
Subject(s) - anomaly (physics) , latitude , annual cycle , tropics , climatology , northern hemisphere , environmental science , atmospheric sciences , magnitude (astronomy) , southern hemisphere , geology , physics , biology , ecology , geodesy , condensed matter physics , astronomy
The climatological annual cycle of oxygen content anomaly of the 0–100 m depth layer for major ocean basins is described using Fourier analysis of objectively analyzed monthly O 2 anomaly values on a 1° grid (70°S–70°N). The largest seasonal changes in O 2 content anomaly occur in the extra‐tropics in the 30° to 60° latitude belt of each hemisphere. The magnitude of the global cycle is dominated by the Pacific Ocean. The annual and semi‐annual harmonics account for most (>90%) of the annual cycle of the monthly O 2 content anomaly. The magnitude of the annual harmonic is largest in the upper 75 m layer except in the tropics and high latitudes. The annual harmonic accounts for >90% of the variance of the zonally integrated monthly O 2 content anomaly.