National Oceanic and
Atmospheric Administration
United States Department of Commerce

Study Reveals a Decadal Decline in Oceanic Dissolved Oxygen

February 16, 2010

In an article to be published in the scientific journal Deep-Sea Research I, PMEL scientists Sunke Schmidtko and Gregory Johnson, together with international co-authors, describe ocean oxygen minima expansions and their biological impacts.  Through their global analysis of recent and historical oceanographic data, the authors find that tropical oxygen-poor zones expanded significantly in area around the globe in the 1990s-2000s compared with the 1960s-1970s.

For more information on recent sustained oceanographic measurements visit PMEL's Repeat Hydrography web site.