Dissolved oxygen conditions for the Maryland portion of Chesapeake Bay for the summer of 2018 were average compared to the long-term average from 1985-2017, reports the Maryland Department of Natural Resources. Low dissolved oxygen volume averaged 0.97 cubic miles from June through September.Continue to the MDDNR site for a monthly breakdown.
Crabs, fish, oysters and other creatures require oxygen to survive. Scientists and natural resource managers study the volume and duration of bay hypoxia to determine possible impacts to bay life. Each year from June through September, the department computes these volumes from data collected by Maryland and Virginia monitoring teams. . .
If you look at the upper graph, it's hard to convince yourself that you are seeing any improvemet in long term trends of hypoxia in the Bay rather than just random variations due to weather.