Dataset Name Sensor Make Spatial Resolution Temporal Resolution Start Date End Date
SeaFlow cruise Observation Irregular Three Minutes 2010-05-04 23:13:08 2018-07-17 07:42:39

Dataset Description

The data sets consist of SeaFlow-based cell abundance, forward light scatter, and pigment fluorescence of individual cells, as well as derived estimates of equivalent spherical diameter (ESD) and cellular carbon content of picophytoplankton, which includes the cyanobacteria Prochlorococcus, Synechococcus and small-sized Crocosphaera (< 5 μm ESD), and picophytoplankton and nanophytoplankton (2-5 μm ESD). SeaFlow data were collected in surface waters (≈5 m depth) from oceanographic cruises carried out across the Northeast Pacific Ocean since 2010. Data provides high spatial resolution (≈1 km) measurements across ocean basin, along with near-monthly data at the long-term sampling site (Station ALOHA) of the Hawaii Ocean Time-Series since 2015. Further information can be found here: <>

# The SeaFlow Instrument

SeaFlow is a new environmental flow cytometer designed by the Armbrust lab to be deployed on oceanographic research vessels to monitor continuously photosynthetic microorganisms. Since its first deployment in 2008, the SeaFlow instrument has collected over 200,000 samples in surface waters of the North Pacific and Atlantic Ocean. The geographical distribution of marine phytoplankton, their optical characteristics (size and pigment content), and their dynamics in relation to environmental factors are of major interest for the oceanographers.

Unlike a conventional flow cytometer, SeaFlow directly analyzes a raw stream of seawater using two detectors that determine the position of the particle in the focal region of the instrument optical system (Swalwell et al. 2011). With this technology, measurements from particles that pass through the ideal focal position of the collection optics can be differentiated from improperly positioned particles, producing a measurement equivalent to that obtained with a conventional cytometer (see OPP filtration). The ratio of these optimally positioned particles (OPP) to the total detectable particles is used to retrieve the volumetric flow rate, allowing accurate estimation of cell abundances (see Virtual Core calibration). Each particle is defined by its light scatter and by two different wavelengths of fluorescence associated with chlorophyll pigment (690 nm for red fluorescence) and phycoerythrin pigment (570 nm for orange fluorescence), which allow the discrimination between cells and detritus or suspended sediments and between photosynthetic and non-photosynthetic organisms.

Details of the SeaFlow project can be found here: <>

Table of Variables

Data Source

Data provided by: François Ribalet, Annette Hynes and Chris Berthiaume, Armbrust lab, University of Washington

How to Acknowledge

François Ribalet, Chris Bertiaume, Annette Hynes, Jarred Swalwell, Michael Carlson, Sophie Clayton, Gwenn Hennon, Camille Poirier, Eric Shimabukuro, Angelicque White, E. Virginia Armbrust, SeaFlow data 1.0: high-resolution abundance, size and biomass of small phytoplankton in the North Pacific. Scientific Data - Under Review

Version History

V1.2 - Sep 16, 2019

V1.1 - Jun 11, 2019

V1.0 - May 22, 2019