Dissolved Oxygen Maps for Summer 1991
In the summer of 1991 four surveys were conducted between July 8 and September 12. The maximum area affected by Hypoxia during this time was 330 square kilometers (127 square miles). The entire hypoxic event lasted for 41 days from July 19 to August 28.
(Select map below to link to a larger image)
 July 8-18, 1991 |
 July 29 - August 13, 1991 |
 August 21-28, 1991 |
 September 4-12, 1991 |