On the variability of dissolved oxygen and apparent oxygen utilization content for the upper world ocean: 1955 to 1998

Details On the variability of dissolved oxygen and apparent oxygen utilization content for the upper world ocean: 1955 to 1998 On the variability of dissolved oxygen and apparent oxygen utilization content for the upper world ocean: 1955 to 1998

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3209604g&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 9, CiteID L09604

Mathematics

Logic

10

Oceanography: General: Climate And Interannual Variability (1616, 1635, 3305, 3309, 4513), Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912), Oceanography: Biological And Chemical: Gases

Scientific paper

We document variability in O2, AOU, and heat content in the top 100 m of the world ocean (70°S-70°N) between 1955 and 1998 using observational data. The lowest O2 (highest AOU) content in the late-1950s are followed by high content in the mid-1980s and by low content in the late-1990s. The O2 and AOU content variability is characterized by relatively small linear trends superimposed on large decadal-scale fluctuations. The largest O2 content changes occur in the Northern Hemisphere (NH). The NH exhibits a negative linear trend in O2 content of ~-30 Tmol per decade between 1983 and 1998 and a positive linear trend of ~6 Tmol per decade between 1955 and 1998 (1 Tmol = 1012 mol). The trends in O2, AOU, and heat content are sensitive to the time frame of the measurements. The results indicate that a constant upper-ocean O2 content inventory should not be assumed on decadal time-scales.

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