Questions:

• What is the along-estuary spatial variability in physical, biological and chemical properties (temperature, salinity, dissolved oxygen, pCO2) and what are the driving forces that create these variations?

• Describe the time dependence in physical properties (temperature, salinity, dissolved oxygen) and explain what forces these.

R/V Elakhaunderway flow-through Conductivity-Temperature (C-T)

Group3

Cast 15, raw

downcast

Mooring:

Oregon Shelf Conditions 17 – 20 Aug 2013

cold, salty, low oxygen water over the shelfhigh chlorophyll, high backscatter near coast

Questions:A. What is the along-estuary spatial variability in physical, biological and

chemical properties (temperature, salinity, dissolved oxygen, pCO2) and what are the driving forces that create these variations?

B. Describe the time dependence in physical properties (temperature, salinity, dissolved oxygen) and explain what forces these.

C. Ecosystem-related questionsi. What role does the coastal ocean play in estuarine DO dynamics?ii. What environmental factors are contributing to DO changes?iii. Are the observed changes at the two stations being driven by

biology or physical processes?

D. Generate plots of TCO2, alkalinity, nutrients, pCO2, pH, omega versus salinity and discuss departures from conservative mixing predictions