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Bracher, Astrid; Taylor, Marc H; Taylor, Bettina B; Dinter, Tilman; Röttgers, Rüdiger; Steinmetz, Francois (2015): Phytoplankton pigments, hyperspectral downwelling irradiance and remote sensing reflectance during POLARSTERN cruises ANT-XXIII/1, ANT-XXIV/1, ANT-XXIV/4, ANT-XXVI/4, and Maria S. Merian cruise MSM18/3. PANGAEA, https://doi.org/10.1594/PANGAEA.847820, Supplement to: Bracher, A et al. (2015): Using empirical orthogonal functions derived from remote-sensing reflectance for the prediction of phytoplankton pigment concentrations. Ocean Science, 11(1), 139-158, https://doi.org/10.5194/os-11-139-2015

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Abstract:
The composition and abundance of algal pigments provide information on phytoplankton community characteristics such as photoacclimation, overall biomass and taxonomic composition. In particular, pigments play a major role in photoprotection and in the light-driven part of photosynthesis. Most phytoplankton pigments can be measured by high-performance liquid chromatography (HPLC) techniques applied to filtered water samples. This method, as well as other laboratory analyses, is time consuming and therefore limits the number of samples that can be processed in a given time. In order to receive information on phytoplankton pigment composition with a higher temporal and spatial resolution, we have developed a method to assess pigment concentrations from continuous optical measurements. The method applies an empirical orthogonal function (EOF) analysis to remote-sensing reflectance data derived from ship-based hyperspectral underwater radiometry and from multispectral satellite data (using the Medium Resolution Imaging Spectrometer - MERIS - Polymer product developed by Steinmetz et al., 2011, doi:10.1364/OE.19.009783) measured in the Atlantic Ocean. Subsequently we developed multiple linear regression models with measured (collocated) pigment concentrations as the response variable and EOF loadings as predictor variables. The model results show that surface concentrations of a suite of pigments and pigment groups can be well predicted from the ship-based reflectance measurements, even when only a multispectral resolution is chosen (i.e., eight bands, similar to those used by MERIS). Based on the MERIS reflectance data, concentrations of total and monovinyl chlorophyll a and the groups of photoprotective and photosynthetic carotenoids can be predicted with high quality. As a demonstration of the utility of the approach, the fitted model based on satellite reflectance data as input was applied to 1 month of MERIS Polymer data to predict the concentration of those pigment groups for the whole eastern tropical Atlantic area. Bootstrapping explorations of cross-validation error indicate that the method can produce reliable predictions with relatively small data sets (e.g., < 50 collocated values of reflectance and pigment concentration). The method allows for the derivation of time series from continuous reflectance data of various pigment groups at various regions, which can be used to study variability and change of phytoplankton composition and photophysiology.
Coverage:
Median Latitude: 1.454300 * Median Longitude: -25.494045 * South-bound Latitude: -49.322000 * West-bound Longitude: -63.117000 * North-bound Latitude: 49.728000 * East-bound Longitude: 10.450000
Date/Time Start: 2005-10-15T12:50:00 * Date/Time End: 2011-07-18T09:38:00
Size:
45 datasets

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Datasets listed in this publication series

  1. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Phytoplankton pigment concentrations during POLARSTERN cruise ANT-XXIII/1. https://doi.org/10.1594/PANGAEA.871713
  2. Bracher, A (2015): Phytoplankton pigment concentrations during POLARSTERN cruise ANT-XXIV/1. https://doi.org/10.1594/PANGAEA.848583
  3. Bracher, A (2015): Phytoplankton pigment concentrations during POLARSTERN cruise ANT-XXIV/4. https://doi.org/10.1594/PANGAEA.848584
  4. Bracher, A (2017): Remote sensing reflectance during POLARSTERN cruise ANT-XXIV/4. https://doi.org/10.1594/PANGAEA.879224
  5. Bracher, A (2017): Remote sensing reflectance during POLARSTERN cruise ANT-XXV/1. https://doi.org/10.1594/PANGAEA.879225
  6. Bracher, A (2015): Phytoplankton pigment concentrations during POLARSTERN cruise ANT-XXVI/4. https://doi.org/10.1594/PANGAEA.848585
  7. Bracher, A (2017): Remote sensing reflectance during POLARSTERN cruise ANT-XXVI/4. https://doi.org/10.1594/PANGAEA.879226
  8. Bracher, A (2015): Phytoplankton pigment concentrations during Maria S. Merian cruise MSM18/3. https://doi.org/10.1594/PANGAEA.848586
  9. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/261-2. https://doi.org/10.1594/PANGAEA.821049
  10. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/262-2. https://doi.org/10.1594/PANGAEA.821050
  11. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/263-2. https://doi.org/10.1594/PANGAEA.821051
  12. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/267-3. https://doi.org/10.1594/PANGAEA.821052
  13. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/268-3. https://doi.org/10.1594/PANGAEA.821053
  14. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/269-3. https://doi.org/10.1594/PANGAEA.821054
  15. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/270-3. https://doi.org/10.1594/PANGAEA.821055
  16. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/271-3. https://doi.org/10.1594/PANGAEA.821056
  17. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/276-3. https://doi.org/10.1594/PANGAEA.821057
  18. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/277-3. https://doi.org/10.1594/PANGAEA.821058
  19. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/278-2. https://doi.org/10.1594/PANGAEA.821059
  20. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/279-3. https://doi.org/10.1594/PANGAEA.821060
  21. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS71/281-3. https://doi.org/10.1594/PANGAEA.821061
  22. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/267-4. https://doi.org/10.1594/PANGAEA.821102
  23. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/268-5. https://doi.org/10.1594/PANGAEA.821103
  24. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/269-2. https://doi.org/10.1594/PANGAEA.821104
  25. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/270-4. https://doi.org/10.1594/PANGAEA.821105
  26. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/272-3. https://doi.org/10.1594/PANGAEA.821106
  27. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/274-4. https://doi.org/10.1594/PANGAEA.821107
  28. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/277-3. https://doi.org/10.1594/PANGAEA.821108
  29. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/278-4. https://doi.org/10.1594/PANGAEA.821109
  30. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/279-5. https://doi.org/10.1594/PANGAEA.821110
  31. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/280-3. https://doi.org/10.1594/PANGAEA.821111
  32. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/281-4. https://doi.org/10.1594/PANGAEA.821112
  33. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/282-3. https://doi.org/10.1594/PANGAEA.821113
  34. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/283-4. https://doi.org/10.1594/PANGAEA.821114
  35. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/285-4. https://doi.org/10.1594/PANGAEA.821115
  36. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/286-5. https://doi.org/10.1594/PANGAEA.821116
  37. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/289-4. https://doi.org/10.1594/PANGAEA.821117
  38. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/291-3. https://doi.org/10.1594/PANGAEA.821118
  39. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/293-3. https://doi.org/10.1594/PANGAEA.821119
  40. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/294-4. https://doi.org/10.1594/PANGAEA.821120
  41. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/295-5. https://doi.org/10.1594/PANGAEA.821121
  42. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/296-4. https://doi.org/10.1594/PANGAEA.821122
  43. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/297-3. https://doi.org/10.1594/PANGAEA.821123
  44. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/298-4. https://doi.org/10.1594/PANGAEA.821124
  45. Bracher, A; Taylor, MH; Taylor, BB et al. (2015): Downwelling spectral irradiance as measured in different depths at radiometer station PS75/299-3. https://doi.org/10.1594/PANGAEA.821125