Zooming in shows salinity and dissolved oxygen are fluctuating heavily alongside the tidal cycle. Can you determine what is causing this?

Zooming in shows salinity and dissolved oxygen are fluctuating heavily alongside the tidal cycle. Can you determine what is causing this?
Dissolved oxygen should not be negative. Can you determine the error that created the unusual oxygen profile above?
May 2020 Newsletter The data above show two major symptoms of the same problem occurring in different locations on a 19plusV2 profiling CTD. On the left, oxygen appears to drop below zero and is highly erratic during the downcast (light blue). However, once it hits a...
February 2020 Newsletter The data above came from a HydroCAT-EP multiparameter probe moored in an estuary near Savannah, Georgia. The highlighted section shows a sudden change in the temperature and salinity data that lasted for approximately 4 days, and continued...
September 2019 Newsletter These data show a small but rather catastrophic deployment error. Shown above, pH and dissolved oxygen data before the highlighted area did not match bottle samples or nearby validation sensors, but data after the highlighted area accurately...
These data show a subtle problem that is producing “fuzzy” salinity and oxygen data. While the overall shape of the profile appears reasonable, small spikes are present throughout the CTD cast. The black lines encompass a particularly strange spot where both salinity...
Reintroducing the Shallow SeaFET™ V2 and Shallow SeapHOx™ V2! We are delighted to announce that we have restarted production and service of our cutting-edge Shallow SeaFET™ V2 and Shallow SeapHOx™ V2 pH sensors! After rigorous qualification, testing, and field...
Sea-Bird Scientific’s HydroCAT-EP V2 CTD Sensor Integrated onto Sonardyne’s Origin 600 ADCP Sonardyne has integrated Sea-Bird Scientific’s HydroCAT-EP V2 multiparameter CTD (conductivity, temperature, depth) sensor into an Origin 600 ADCP (acoustic doppler current...
Dynamic Range Optical Sensors: Look Deeper with ECO V2 Dive into the next generation of optical monitoring with Sea-Bird Scientific's cutting-edge ECO V2 Series. This innovative line of sensors offers an impressive dynamic range, effortlessly transitioning from the...