Albinus, Michelle; Raffelt, Lukas; Sawle, Shubham; Badewien, Thomas Henry (2025): Chlorophyll a and phaeophytin a measurements from discrete water samples during RV HEINCKE cruise HE662 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984877
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Published: 2025-09-16 • DOI registered: 2025-10-15
Abstract:
This dataset was collected during the cruise HE662 (24.05.2025 to 13.06.2025) with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany. It contains chlorophyll a measurements [µg/l] from water samples collected from discrete sampling via CTD. In total, 27 samples have been collected. To obtain chl-a concentrations water samples were filtered onboard through 0.7 µm pore size, glass fiber filters (Whatman GF/F) under low vacuum. Filters were frozen immediately at -80 °C until extraction in laboratory by 90% acetone method (measured on 07.08.2025). Concentrations were calculated from fluorescence measured with a pre-calibrated Turner Design TD 7200-02 laboratory fluorometer (EPA445.0, Turner Manual). Calibration details are given in the attached calibration document (PDF).
Documentation:
Arar, E J; Collins, G B (1997): Method 445.0 In Vitro Determination of Chlorophyll a and Pheophytin ain Marine and Freshwater Algae by Fluorescence. U.S. Environmental Protection Agency, Washington, DC, 1997, https://cfpub.epa.gov/si/si_public_record_report.cfm?Lab=NERL&dirEntryId=309417 (M445_0.PDF)
Further details:
Calibration sheet of Turner Designs Fluorometer from 2025-08-06 (2025). TurnerFluorometer_Calibration_20250806_Standard20241114_minus20.pdf
Funding:
German Research Foundation (DFG), grant/award no. 451574234: FOR 5267 - Biogeochemical processes and Air-sea exchange in the Sea-Surface microlayer (BASS)
Coverage:
Median Latitude: 56.186252 * Median Longitude: 18.431289 * South-bound Latitude: 56.086100 * West-bound Longitude: 17.935500 * North-bound Latitude: 56.337000 * East-bound Longitude: 18.903800
Date/Time Start: 2025-05-27T08:05:00 * Date/Time End: 2025-06-08T13:01:00
Minimum DEPTH, water: 5.0 m * Maximum DEPTH, water: 21.2 m
Event(s):
HE662_3-6 * Latitude: 56.097537 * Longitude: 18.483607 * Date/Time: 2025-05-27T08:13:51 * Elevation: -104.0 m * Campaign: HE662 (BASS) * Basis: Heincke * Method/Device: CTD/Rosette (CTD-RO)
HE662_3-12 * Latitude: 56.101944 * Longitude: 18.486326 * Date/Time: 2025-05-27T14:08:06 * Elevation: -104.0 m * Campaign: HE662 (BASS) * Basis: Heincke * Method/Device: CTD/Rosette (CTD-RO)
HE662_4-8 * Latitude: 56.086563 * Longitude: 18.466001 * Date/Time: 2025-05-28T08:09:09 * Elevation: -103.0 m * Campaign: HE662 (BASS) * Basis: Heincke * Method/Device: CTD/Rosette (CTD-RO)
Comment:
Michelle Albinus is responsible for data processing and publishing. Persons responsible for filtration on board are Lukas Raffelt and Shubham Sawle. Chief Scientist of RV HEINCKE cruise HE662 and PI of the publishing working group is Thomas H. Badewien.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Albinus, Michelle | |||
| 2 | DATE/TIME | Date/Time | Albinus, Michelle | Geocode | ||
| 3 | LATITUDE | Latitude | Albinus, Michelle | Geocode | ||
| 4 | LONGITUDE | Longitude | Albinus, Michelle | Geocode | ||
| 5 | DEPTH, water | Depth water | m | Albinus, Michelle | CTD, Sea-Bird, SBE 911plus | Geocode |
| 6 | Chlorophyll a | Chl a | µg/l | Albinus, Michelle | Fluorometer, Turner Designs, TD7200-02; Measurement according to Arar and Collins (1997) [EPA Method 445.0] | |
| 7 | Phaeophytin a | Phaeophytin a | µg/l | Albinus, Michelle | Fluorometer, Turner Designs, TD7200-02; Measurement according to Arar and Collins (1997) [EPA Method 445.0] | |
| 8 | Phaeophytin a/Chlorophyll a ratio | Phaeophytin a/Chl a | Albinus, Michelle | Fluorometer, Turner Designs, TD7200-02 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
81 data points
Data
| 1 Event | 2 Date/Time | 3 Latitude | 4 Longitude | 5 Depth water [m] | 6 Chl a [µg/l] | 7 Phaeophytin a [µg/l] | 8 Phaeophytin a/Chl a |
|---|---|---|---|---|---|---|---|
| HE662_3-6 | 2025-05-27T08:05:00 | 56.0978 | 18.4826 | 5.0 | 0.24 | 0.03 | 0.117 |
| HE662_3-12 | 2025-05-27T14:00:00 | 56.1020 | 18.4865 | 20.0 | 0.16 | 0.03 | 0.207 |
| HE662_14-5 | 2025-06-06T07:07:00 | 56.0924 | 18.8716 | 20.0 | 0.37 | 0.03 | 0.070 |
| HE662_14-12 | 2025-06-06T13:12:00 | 56.0920 | 18.8736 | 20.0 | 0.18 | 0.04 | 0.236 |
| HE662_15-4 | 2025-06-07T07:07:00 | 56.0916 | 18.8735 | 20.0 | 0.17 | 0.02 | 0.133 |
| HE662_15-10 | 2025-06-07T13:05:00 | 56.0916 | 18.8735 | 20.0 | 0.31 | 0.04 | 0.133 |
| HE662_16-5 | 2025-06-08T07:05:00 | 56.1067 | 18.8399 | 20.0 | 0.19 | 0.02 | 0.121 |
| HE662_16-12 | 2025-06-08T13:01:00 | 56.1073 | 18.8384 | 20.0 | 0.20 | 0.04 | 0.224 |
| HE662_15-12 | 2025-06-07T14:00:00 | 56.0870 | 18.9038 | 21.2 | 0.40 | 0.08 | 0.205 |
| HE662_13-12 | 2025-06-05T13:00:00 | 56.2101 | 18.0783 | 20.0 | 0.31 | 0.03 | 0.088 |
| HE662_13-5 | 2025-06-05T07:00:00 | 56.2163 | 18.0287 | 20.0 | 0.22 | 0.03 | 0.132 |
| HE662_12-9 | 2025-06-04T13:20:00 | 56.2279 | 18.0801 | 20.0 | 0.21 | 0.03 | 0.153 |
| HE662_12-4 | 2025-06-04T08:07:00 | 56.2278 | 18.0812 | 20.0 | 0.39 | 0.04 | 0.096 |
| HE662_11-6 | 2025-06-03T12:00:00 | 56.1837 | 18.0536 | 20.0 | 0.15 | 0.06 | 0.387 |
| HE662_10-4 | 2025-06-03T06:59:00 | 56.3132 | 18.3737 | 20.0 | 0.32 | 0.05 | 0.162 |
| HE662_9-11 | 2025-06-02T13:08:00 | 56.3128 | 18.3729 | 20.0 | 0.09 | 0.02 | 0.201 |
| HE662_9-5 | 2025-06-02T07:00:00 | 56.3183 | 18.3613 | 20.0 | 0.53 | 0.16 | 0.294 |
| HE662_8-12 | 2025-06-01T13:00:00 | 56.2896 | 18.3318 | 20.0 | 0.18 | 0.08 | 0.464 |
| HE662_8-5 | 2025-06-01T07:00:00 | 56.2898 | 18.3333 | 20.0 | 0.47 | 0.02 | 0.035 |
| HE662_7-13 | 2025-05-31T13:30:00 | 56.3156 | 18.3818 | 20.0 | 0.68 | 0.06 | 0.096 |
| HE662_7-6 | 2025-05-31T08:02:00 | 56.3370 | 18.2967 | 20.0 | 0.27 | 0.05 | 0.205 |
| HE662_6-11 | 2025-05-30T13:07:00 | 56.2874 | 17.9817 | 20.2 | 0.14 | 0.03 | 0.229 |
| HE662_6-5 | 2025-05-30T07:00:00 | 56.2544 | 17.9355 | 20.1 | 0.30 | 0.04 | 0.127 |
| HE662_5-14 | 2025-05-29T13:05:00 | 56.0977 | 18.4899 | 20.0 | 0.43 | 0.09 | 0.204 |
| HE662_5-5 | 2025-05-29T07:01:00 | 56.0955 | 18.4897 | 20.0 | 0.24 | 0.03 | 0.116 |
| HE662_4-13 | 2025-05-28T13:01:00 | 56.0972 | 18.4645 | 20.0 | 0.24 | 0.03 | 0.116 |
| HE662_4-8 | 2025-05-28T08:00:00 | 56.0861 | 18.4667 | 19.3 | 0.33 | 0.05 | 0.159 |