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Climatological annual cycle of upper ocean oxygen content anomaly
National Oceanographic Data Center, NOAA, Silver Spring, Maryland, USA
National Oceanographic Data Center, NOAA, Silver Spring, Maryland, USA
National Oceanographic Data Center, NOAA, Silver Spring, Maryland, USA
National Oceanographic Data Center, NOAA, Silver Spring, Maryland, USA
National Oceanographic Data Center, NOAA, Silver Spring, Maryland, USA
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 O2 anomaly values on a 1° grid (70°S–70°N). The largest seasonal changes in O2 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 O2 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 O2 content anomaly.
Received 13 October 2004; accepted 9 February 2005; published 10 March 2005.
Citation: (2005), Climatological annual cycle of upper ocean oxygen content anomaly, Geophys. Res. Lett., 32, L05611, doi:10.1029/2004GL021745.
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