Hydrodynamic time-series data from San Pablo Bay and Grizzly Bay, California, 2020

Two instrument tripod platforms were deployed at the Grizzly Bay shallow sites, and together contained the following instruments: RBR DUO bursting pressure sensor, Two Echologger Altimeter, two RBR CTDs, RBR Vituosos with Seapoint turbidity meter, three Nortek single point acoustic doppler velocimeters each with a Seapoint turbidity meter, Sequoia Scientific Laser In-situ scattering and transmissometry (LISST).

Two instrument tripod platforms were deployed at the San Pablo Bay shallow sites, and together contained the following instruments: RBR DUO bursting pressure sensor, Echologger Altimeter, two RBR CTDs, RBR Vituosos with Seapoint turbidity meter, three Nortek single point acoustic doppler velocimeters with Seapoint turbidity meter, Sequoia Scientific acoustic backscatter.

An instrument platform was deployed at the San Pablo Bay channel site containing the following instruments: RDInstruments acoustic doppler current profiler and RBR CTD.

Instruments were retrieved from the San Pablo Bay shallow and San Pablo Bay channel sites. The data from the retrieved instruments were post-processed using manufacturers software packages and USGS matlab codes.

Instruments were retrieved from the Grizzly Bay shallow sites. The data from the retrieved instruments were post-processed using manufacturers software packages and USGS matlab codes.

Data were accumulated into NetCDF files. During post-processing, data collected when instruments were out of the water were removed from the time series. Bad data points identified by 1) the deployment and recovery times, 2) data flagged as erroneous by the manufacturer, 3) amplitude or correlation values outside of predetermined quality thresholds for the velocimeter, were removed. The files include data of intermittent poor quality due to interference by vegetation caught on frames or other biofouling. In a few datasets with persistent vegetative/biofouling interference the compromised data were removed, as noted in the associated metadata. Turbidity data are raw unless otherwise noted and include high values that may be attributable to vegetation. Use of these data requires careful assessment of data quality. LISST volume concentrations are most accurate when the optical percent transmission is above 30; when this is true, light passing through the sample volume is unlikely to be scattered by more than one particle. Low quality LISST data at the end of a few files were removed, however some bad data are still present in the files and therefore judgment should be applied when using them, as with all other data files. Some platforms experienced sinking over time or shifted from an unknown cause which altered the roll, pitch, heading, or sensor elevation. No corrections were made to account for these possible shifts, therefore the user should examine the data and metadata carefully.

Files were named with a convention that uses a 12- to 15-digit alpha-numeric code. The first three characters for this dataset are all 'ERO' for the experiment name; the fourth and fifth positions represent the calendar year in which the data were collected (20, 2020); the sixth, seventh and eighth characters are an alphabetic code for the site name (GHT, PCT, etc.); the ninth and tenth characters represent the instrument position on the platform, where 01 is the top-most. Next is a two- or three-character code for the instrument type (vec, Norteks Acoustic Doppler Velocimeter; wh, RDInstrument's acoustic doppler current profile current data; wv, RDInstrument's acoustic doppler current profile wave data; pt, RBRs bursting pressure sensor with temperature; ctd, RBRs CTD; tu, RBRs Virtuoso turbidity logger; ls or lsa, Sequoia Scientifics LISST, LISST ABS). There are an additional 2 to 3 characters for instruments that collect in a bursting pattern to indicate whether the file includes the burst data (-b) or the statistics and/or singular observations of the burst (-s), and for instruments that output wave statistics (-wvs). This indicator is omitted if there is no bursting pattern.