Chlorophyll concentration and optical absorption spectra of particulate and dissolved material collected aboard the R/V Point Sur cruise DP06 from 2018-07-20 to 2018-08-01

This dataset contains measurements of chlorophyll concentrations and optical absorption spectra derived from particulate filtrations of water samples and the particle-free filtrate. More specifically, the dataset reports chlorophyll-a concentration using the Welschmeyer (1994) method (“no acid” technique), chlorophyll-a and phaeophytin concentration using the Holm-Hansen and Riemann (1978) methods (‘acid” technique), optical absorption measurements of detrital, dissolved material (colored dissolved organic matter (CDOM) or gelbstoff) and particulate material. The water samples were collected using a CTD rosette or surface water sample aboard the R/V Point Sur cruise DP06 from 2018-07-20 to 2018-08-01. The CTD data collected during this cruise can be found under GRIIDC Unique Dataset Identifier (UDI) R4.x257.000:0031 (DOI: 10.7266/n7-ceq1-5g82). The optical absorption spectra from seawater’s particulate and dissolved components can be used to compute the penetration of light to various depths, estimate the proportion of living to non-living particulate matter, assess photosynthetic light availability and the type of phytoplankton present, and the validate of satellite or airborne ocean color measurements. Chlorophyll and phaeopigment concentrations are often used to estimate the amount of phytoplankton in water samples, and to allow extrapolation of in situ fluorometric measurements. The R/V Point Sur DEEPEND cruise DP06 was led by chief scientist Dr. Tracey Sutton.