Chlorophyll concentration and optical absorption spectra of particulate and dissolved material, collected at several depths on DEEPEND cruises DP01 and DP02, May 2015 - Aug 2015

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Data Collection Period

2015-05-01 to 2015-08-21


Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC)




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 present, and to allow extrapolation of in situ fluorometric measurements. This dataset contains measurements of chlorophyll concentrations and optical absorption spectra derived from particulate filtrations of water samples and the particle-free filtrate. The water samples were collected between 02-08 May and 09-12 August, 2015 during the DP01 and DP02 cruises, as was the GRIIDC CTD datasets R4.x257.230:0004 and R4.x257.230:0010.


Chlorophyll concentrations and the spectral absorption of particulates and dissolved material was measured from selected water samples to validate in situ fluorometers, for comparison with remote sensing reflectance and optical properties, and to aid estimates of the distribution of light.

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