This dataset contains water column samples that were collected at variable depths during the cruises, primarily utilizing a CTD/rosette bottle system, although sometimes with a water pumping system (COMIDA CAB 2009 and 2010). Cruises included in this synthesis data set are outlined in the Pacific Marine Arctic Regional Synthesis (PacMARS) Final Report, Methods section, to be posted on the PacMARS home page (see Related Links, below). Chlorophyll-a samples were filtered shipboard and either extracted shipboard or the filters frozen and analyzed at a land-based laboratory. Note that many of these data are listed as individual bottle depths and values in full hydrographic files. Links to these referenced files can be found in the README documentation.