All data on-board the Thetis Profiler is time stamped using the on-board processor clock. This clock provides 10 ms resolution. The on-board clock is synced to the shore side host controller computer during each surface telemetry session, though the user can...
To first order, the vertical resolution is set by the vertical profiling speed. The profiling speed is user configurable (which can be changed during the deployment). At typical profiling speeds of 20 cm/sec, the Thetis Profiler provides the required 0.25 m vertical...
Derivation of Kd from a In what follows we have left off the dependence on wavelength. In addition we have left off effects due to inelastic scattering. Modeling Kd(z) requires the inclusion of the depth dependence of the shape of the radiance...
The SeaFETTM reports pH measurements on the total scale. Values of pH reported on the total scale represent the effective hydrogen ion concentration with contributions from both free hydrogen ions and those which have reacted with sulfate.
Conductivity cells drift primarily as a function of cell fouling. There are several sources of the fouling:Biological growth is the primary source of cell fouling. Rinsing the conductivity cell with clean de-ionized water after each cast helps prevent most growth...
The SUNA V2 determines nitrate concentrations from the shape of the UV absorption curve. The least squares curve fitting algorithm uses calibrated extinction coefficients for nitrate and bromide (strong absorbing species in salt water) to calculate the concentration...
The acquisition of conductivity/salinity data alongside the SeaFETTM is recommended. The acquisition of temperature data is not necessary as the SeaFETTM performs temperature measurements. Typically, conductivity and temperature measurements are combined in...
Sea-Bird Scientific multispectral 500 series radiometers measure light at each fixed wavelength with an interference filter/detector assembly. The analog output of each detector is amplified and digitized. The amplification stage and noise filtering is...
Sea-Bird Scientific has developed cosine collectors that are specifically designed to optimize performance in the intended media of operation (air or water). So in water irradiance sensors have cosine collectors that provide an excellent response in water but not in...
The FIRe System measures changes in chlorophyll fluorescence that occur during a short (100 - 400 ?s) but intense (> 20,000 ?mol photons m-2 s-1) flash of light whereas the PAM approach measures the fluorescence induced by a weak modulated light source while using...
Celebrating and honoring our LGBTQIA+ communities It is in our DNA at Sea-Bird Scientific to embrace community and the beauty in diversity. As during previous Pride Months, we have changed our logo on social media to feature the colors of Pride throughout the month of...
We are pleased to partner with Scripps Institute of Oceanography to showcase a recent study done by Dr. Andrea Kealoha and her team at the University of Hawai’i at Mānoa in monitoring coastal water quality following the devastating wildfire in Lahaina in August of...
Welcome to the Sea-Bird Swell – our monthly newsletter that gives you the latest on what’s happening at Sea-Bird Scientific and the broader oceanographic community. Using the HydroCAT-EP V2 to Study Coastal Water Quality Following the Lahaina Wildfire We were...