Mehdipour, Ehsan; Xi, Hongyan; Bracher, Astrid (2026): Total chlorophyll a and phytoplankton functional type chlorophyll a concentrations estimated from underway hyperspectral spectrophotometric measurements during the Atlantic Ocean transect of RV Polarstern cruise PS113 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.996416
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Published: 2026-08-10 • DOI registered: 2026-08-10
Abstract:
This dataset provides high-spatial-resolution (approximately 300 m) estimates of total chlorophyll a concentration and chlorophyll a concentrations of five phytoplankton functional types, including diatoms, dinoflagellates, haptophytes, green algae, and prokaryotic phytoplankton. The products were generated by applying an EOF–GLM model to particulate absorption spectra derived from continuous hyperspectral spectrophotometric measurements of absorption and beam attenuation acquired through the ship's underway seawater intake system during RV Polarstern cruise PS113 between 10 May and 9 June 2018. The model was trained using paired ACS-derived particulate absorption spectra and HPLC-derived pigment observations and subsequently applied to the complete particulate absorption dataset to generate continuous chlorophyll a concentrations. The final products were averaged into 1 min intervals and include the associated uncertainty estimates. Further details on the methodology are provided in Mehdipour et al. (2026a, 2026b) and Bracher et al. (2026).
Keyword(s):
Supplement to:
Mehdipour, Ehsan; Xi, Hongyan; Barth, Alexander; Wilhelm, Adalbert; Bracher, Astrid (2026): Fusion of Multisource Data for Comprehensive Assessment of Phytoplankton Composition. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 19, 18679-18701, https://doi.org/10.1109/JSTARS.2026.3696195 (2026a)
References:
Bracher, Astrid; Xi, Hongyan; von Appen, Wilken-Jon; Mehdipour, Ehsan; Metfies, Katja; McPherson, Rebecca; Zeising, Moritz; Nöthig, Eva-Maria (2025): Resolving the interannual variability of phytoplankton community composition in Fram Strait using ship-based high-frequency spectrophotometric measurements from 2015 to 2024. Deep Sea Research Part II: Topical Studies in Oceanography, https://doi.org/10.1016/j.dsr2.2025.105568
Further details:
Mehdipour, Ehsan; Xi, Hongyan; Wilhelm, Adalbert; Bracher, Astrid (2026): Technical Description of a Reproducible Data Science Workflow for Gap-Filling Satellite Phytoplankton Functional Type Products and Fusion with In Situ Optical Data. Zenodo, https://doi.org/10.5281/zenodo.21737214 (2026b)
Project(s):
Funding:
Helmholtz Association of German Research Centres (HGF), grant/award no. HIDSS-0005: Helmholtz School for Marine Data Science (MarData)
Coverage:
Median Latitude: 4.807810 * Median Longitude: -25.333808 * South-bound Latitude: -47.658616 * West-bound Longitude: -60.716953 * North-bound Latitude: 50.393368 * East-bound Longitude: 0.501904
Date/Time Start: 2018-05-10T17:22:00 * Date/Time End: 2018-06-09T12:56:00
Event(s):
PS113-track * Latitude Start: -53.144700 * Longitude Start: -70.909100 * Latitude End: 53.567500 * Longitude End: 8.554800 * Date/Time Start: 2018-05-08T14:15:00 * Date/Time End: 2018-06-10T22:30:00 * Campaign: PS113 (ANT-XXXIII/4) * Basis: Polarstern * Method/Device: Underway cruise track measurements (CT)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Mehdipour, Ehsan | |||
| 2 | DATE/TIME | Date/Time | Mehdipour, Ehsan | Geocode | ||
| 3 | LATITUDE | Latitude | Mehdipour, Ehsan | Geocode | ||
| 4 | LONGITUDE | Longitude | Mehdipour, Ehsan | Geocode | ||
| 5 | Chlorophyll a | Chl a | µg/l | Mehdipour, Ehsan | ||
| 6 | Chlorophyll a, Diatoms | Chl a Diatoms | µg/l | Mehdipour, Ehsan | ||
| 7 | Chlorophyll a, Dinoflagellata | Chl a Dinoflagellata | µg/l | Mehdipour, Ehsan | ||
| 8 | Chlorophyll a, Haptophyta | Chl a Haptophyta | µg/l | Mehdipour, Ehsan | ||
| 9 | Chlorophyll a, Green Algae | Chl a GA | µg/l | Mehdipour, Ehsan | ||
| 10 | Chlorophyll a, Prokaryotes | Chl a Prokaryotes | µg/l | Mehdipour, Ehsan | ||
| 11 | Chlorophyll a, logarithm | Chl a log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 12 | Chlorophyll a, Diatoms, logarithm | Chl a Diatoms log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 13 | Chlorophyll a, Dinoflagellata, logarithm | Chl a Dinoflagellata log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 14 | Chlorophyll a, Haptophyta, logarithm | Chl a Haptophyta log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 15 | Chlorophyll a, Green Algae, logarithm | Chl a GA log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 16 | Chlorophyll a, Prokaryotes, logarithm | Chl a Prokaryotes log | log10(µg/l) | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 17 | Chlorophyll a, logarithm, uncertainty | Chl a logarithm unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 18 | Chlorophyll a, Diatoms, logarithm, uncertainty | Chl a Diatoms log unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 19 | Chlorophyll a, Dinoflagellata, logarithm, uncertainty | Chl a Dinoflagellata log unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 20 | Chlorophyll a, Haptophyta, logarithm, uncertainty | Chl a Haptophyta log unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 21 | Chlorophyll a, Green Algae, logarithm, uncertainty | Chl a GA log unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) | |
| 22 | Chlorophyll a, Prokaryotes, logarithm, uncertainty | Chl a Prokaryotes log unc | ± | Mehdipour, Ehsan | Base-10 logarithm (log10) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
404550 data points
Download Data
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