Gulf of Mexico Data Atlas Gulf of Mexico Data Atlas

Dissolved Oxygen

Dissolved Oxygen - Climatological Mean

Scientifically quality-controlled historical in situ dissolved oxygen data in the World Ocean Database 2013 obtained by chemical methods were used to construct annual, seasonal, and monthly climatological distribution fields of dissolved oxygen, apparent oxygen utilization (AOU), and dissolved oxygen saturation at selected standard depth levels of the world ocean on a one-degree latitude-longitude grid. This map presents the seasonal climatological mean fields of dissolved oxygen for two water depths (10 meters and 250 meters) on a one degree grid. Dissolved oxygen concentration measured by chemical methods is often analyzed following various modifications of the Winkler titration followed by end-detections by visual, amperometric, or photometric methods. Measurements are in ml/l. Seasons are as follows: Fall (October - December), Winter (January - March), Spring (April - June), Summer (July - September).

Additional image formats and visualization tools:

Dissolved Oxygen Climatological Mean Atlas Dataset

Hypoxia

Using a 10min x 10min grid, the lowest minimum values of dissolved oxygen are presented as well as number of years. This analysis is based on the Southeast Area Monitoring and Assessment Program (SEAMAP) summer groundfish surveys from 2001 through 2011. This grid shows those cells considered hypoxic (0 to 2.0 mg/l) as well as those grids where no hypoxia has been detected over this time frame.

Additional image formats and visualization tools:

Hypoxia Atlas Dataset