/* DATA DESCRIPTION: Citation: Oelker, Julia; Albinus, Michelle; Karstensen, Johannes; Schlundt, Michael (2026): Chlorophyll a and phaeophytin a measurements from discrete water samples during RV MARIA S. MERIAN cruise MSM129/1 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995663 (DOI registration in progress) Abstract: This dataset was collected during the cruise MSM129/1 with RV MARIA S. MERIAN from Warnemünde, Germany to St. John's, Canada. It contains chlorophyll-a measurements [µg/l] from water samples collected from the seawater supply (Reinseewassersystem, RSWS) as well as from three CTD casts to calibrate the fluorometers of the RSWS system and the CTD, respectively. The outflow of a PocketFerrybox that was connected to the seawater supply in the hangar was used for sampling. It takes a substantial amount of time for the water to reach the hanger from the intake point. The time delay between the sensor readings of the RSWS and the PocketFerrybox was determined and the timestamps of the water sampling were adjusted accordingly. Given latitute and longitude refer to this corrected timestamp. The original time of water sampling in the hangar is given as an additional column with the comment time of sampling. To obtain chl-a concentrations, water samples were filtered onboard through 0.7 μm pore size, glass fiber filters (Whatmann GF/F) under low vacuum. Filters were frozen immediately at -80 °C until extraction in laboratory by 90% acetone method. Concentrations were calculated from fluorescence measured with a pre-calibrated Turner Design TD 7200-02 laboratory fluorometer (EPA445.0, Turner Manual). Keyword(s): Chlorophyll a; Fluorescence; Phaeophytin a Related to: Karstensen, Johannes; Schlundt, Michael; Anselm, Norbert; Balan, Vasile-Sorin; Behr, Yurid; Boskamp, Grete; Börner, Gregor; Brechtelsbauer, Stefanie; Damaske, Daniel; Glüsen, Lasse Alexander; El Rahman Hassoun, Abed; Krahmann, Gerd; Lösel, Christiane; Marki, Alexandra; Michels, Emil; Oelker, Julia; Olbricht, Hannah; Ripke, Kim; Rehage, Marianne; Riemann-Campe, Kathrin (2025): Understanding processes and long-term variability in the Labrador Sea, Cruise No. MSM129/1, 25. May 2024 - 05. June 2024, Rostock (Germany) - St. John's (Canada). MARIA S. MERIAN-Berichte, Begutachtungspanel Forschungsschiffe, MSM129/1, 25 pp, https://doi.org/10.48433/cr_msm129_1 Oelker, Julia; Karstensen, Johannes; Schlundt, Michael (2026): Continuous optical chlorophyll-a and turbidity data along RV MARIA S. MERIAN cruise MSM129/1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.992565 References: 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, https://download.pangaea.de/reference/107393/attachments/M445_0.PDF Turner Designs (2019): Trilogy Laboratory Fluorometer User's Manual, Version 1.7. San Jose, CA, USA, https://download.pangaea.de/reference/124949/attachments/998-7210.pdf Project(s): DAM CDRmare - AIMS3: Alternate scenarios, Innovative technologies, and Monitoring approaches for Sub-Seabed Storage of carbon dioxide (AIMS3) (URI: https://aims3.cdrmare.de/en/) Coverage: MEDIAN LATITUDE: 55.617925 * MEDIAN LONGITUDE: -23.726690 * SOUTH-BOUND LATITUDE: 49.782990 * WEST-BOUND LONGITUDE: -48.563390 * NORTH-BOUND LATITUDE: 59.166830 * EAST-BOUND LONGITUDE: 11.480050 DATE/TIME START: 2024-05-25T09:35:00 * DATE/TIME END: 2024-06-04T10:13:30 MINIMUM DEPTH, water: 6.5 m * MAXIMUM DEPTH, water: 100.0 m Event(s): MSM129/1_3-1 (msm129_1_001) * LATITUDE: 57.536124 * LONGITUDE: -26.029361 * DATE/TIME: 2024-05-31T15:25:43 * ELEVATION: -2774.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: MSM129/1 (DAM Underway, LabSeaFlow2024) * BASIS: Maria S. Merian (URI: https://en.wikipedia.org/wiki/RV_Maria_S._Merian) * METHOD/DEVICE: CTD/Rosette (CTD-RO) MSM129/1_6-1 (msm129_1_002) * LATITUDE: 53.630943 * LONGITUDE: -39.995165 * DATE/TIME: 2024-06-02T16:57:31 * ELEVATION: -3456.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: MSM129/1 (DAM Underway, LabSeaFlow2024) * BASIS: Maria S. Merian (URI: https://en.wikipedia.org/wiki/RV_Maria_S._Merian) * METHOD/DEVICE: CTD/Rosette (CTD-RO) MSM129/1_7-1 (msm129_1_003) * LATITUDE: 50.969488 * LONGITUDE: -46.210246 * DATE/TIME: 2024-06-03T19:14:29 * ELEVATION: -2817.0 m * LOCATION: North Atlantic Ocean * CAMPAIGN: MSM129/1 (DAM Underway, LabSeaFlow2024) * BASIS: Maria S. Merian (URI: https://en.wikipedia.org/wiki/RV_Maria_S._Merian) * METHOD/DEVICE: CTD/Rosette (CTD-RO) Parameter(s): Event label (Event) * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) DATE/TIME (Date/Time) * GEOCODE * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) DATE/TIME (Date/Time) * GEOCODE * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) * COMMENT: of sampling at FerryBox LATITUDE (Latitude) * GEOCODE * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) LONGITUDE (Longitude) * GEOCODE * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) DEPTH, water [m] (Depth water) * GEOCODE * PI: Oelker, Julia (https://orcid.org/0000-0002-0783-3617, julia.oelker@uni-oldenburg.de) * METHOD/DEVICE: CTD, Sea-Bird, SBE 911plus Chlorophyll a [µg/l] (Chl a) * PI: Albinus, Michelle (https://orcid.org/0009-0004-4520-8830, michelle.albinus@uol.de) * METHOD/DEVICE: Fluorometer, Turner Designs, Trilogy 7200-002 [EPA Method 445.0] Phaeophytin a [µg/l] (Phaeophytin a) * PI: Albinus, Michelle (https://orcid.org/0009-0004-4520-8830, michelle.albinus@uol.de) * METHOD/DEVICE: Fluorometer, Turner Designs, Trilogy 7200-002 [EPA Method 445.0] Phaeophytin a/Chlorophyll a ratio (Phaeophytin a/Chl a) * PI: Albinus, Michelle (https://orcid.org/0009-0004-4520-8830, michelle.albinus@uol.de) * METHOD/DEVICE: Fluorometer, Turner Designs, Trilogy 7200-002 License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) * Processing Level: PANGAEA data processing level 3 (URI: https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_3) Size: 150 data points */ Event Date/Time Date/Time (of sampling at FerryBox) Latitude Longitude Depth water [m] (CTD, Sea-Bird, SBE 911plus) Chl a [µg/l] (Fluorometer, Turner Designs, ...) Phaeophytin a [µg/l] (Fluorometer, Turner Designs, ...) Phaeophytin a/Chl a (Fluorometer, Turner Designs, ...) 2024-05-25T09:35:00 2024-05-25T09:46:50 54.53125 11.48005 6.5 0.75 0.08 0.10 2024-05-26T07:05:00 2024-05-26T07:17:20 57.68848 11.15064 6.5 1.32 0.16 0.12 2024-05-26T10:48:00 2024-05-26T11:00:30 57.85846 10.76621 6.5 0.94 0.15 0.16 2024-05-26T14:34:00 2024-05-26T14:45:50 57.85846 10.27067 6.5 0.93 -0.08 -0.09 2024-05-26T17:51:00 2024-05-26T18:02:58 57.84940 9.30853 6.5 0.74 0.07 0.09 2024-05-26T18:32:00 2024-05-26T18:44:20 57.84589 9.08979 6.5 1.11 0.02 0.02 2024-05-26T19:53:00 2024-05-26T20:05:20 57.82981 8.64668 6.5 1.33 0.08 0.06 2024-05-27T04:26:00 2024-05-27T04:38:10 58.10367 5.92362 6.5 2.38 0.43 0.18 2024-05-27T06:33:00 2024-05-27T06:44:40 58.34164 5.39514 6.5 2.84 0.17 0.06 2024-05-27T10:00:00 2024-05-27T10:11:30 58.54141 4.56928 6.5 1.82 0.07 0.04 2024-05-27T12:44:00 2024-05-27T12:56:00 58.71391 3.77517 6.5 1.59 0.33 0.21 2024-05-27T15:52:00 2024-05-27T16:04:15 58.90836 2.87423 6.5 0.55 0.12 0.22 2024-05-27T19:03:00 2024-05-27T19:15:05 59.08643 1.93909 6.5 0.45 0.10 0.22 2024-05-29T22:21:00 2024-05-29T22:23:36 59.16683 -14.55341 6.5 0.69 0.06 0.08 2024-05-30T10:52:00 2024-05-30T11:13:21 58.80076 -18.43106 6.5 0.74 0.25 0.33 2024-05-30T13:54:00 2024-05-30T14:15:17 58.69766 -19.33012 6.5 0.82 0.14 0.17 2024-05-30T19:00:00 2024-05-30T19:21:18 58.52418 -20.67041 6.5 0.42 0.13 0.31 2024-05-30T22:39:00 2024-05-30T22:59:46 58.35507 -21.65536 6.5 0.47 0.08 0.17 2024-05-31T08:12:00 2024-05-31T08:33:27 57.86240 -24.34986 6.5 0.76 0.17 0.22 2024-05-31T11:40:00 2024-05-31T12:01:16 57.68611 -25.27052 6.5 0.77 0.16 0.22 2024-05-31T16:23:00 2024-05-31T16:44:11 57.53240 -26.02334 6.5 0.51 0.21 0.41 MSM129/1_3-1 2024-05-31T16:42:00 57.53612 -26.02936 10.0 0.63 0.21 0.06 MSM129/1_3-1 2024-05-31T16:35:00 57.53612 -26.02936 25.0 0.62 0.29 0.02 MSM129/1_3-1 2024-05-31T16:34:00 57.53612 -26.02936 50.0 0.35 0.27 0.01 MSM129/1_3-1 2024-05-31T16:34:00 57.53612 -26.02936 75.0 0.10 0.15 0.00 MSM129/1_3-1 2024-05-31T16:33:00 57.53612 -26.02936 100.0 0.07 0.08 0.00 2024-05-31T23:50:00 2024-06-01T00:11:29 57.11764 -28.20826 6.5 1.03 0.12 0.12 2024-06-01T07:50:00 2024-06-01T08:11:13 56.55418 -30.65424 6.5 1.24 0.20 0.16 2024-06-01T11:41:00 2024-06-01T12:02:02 56.29223 -31.74022 6.5 1.11 0.05 0.04 2024-06-01T19:46:00 2024-06-01T20:07:05 55.57777 -34.19838 6.5 1.62 0.19 0.11 2024-06-01T23:45:00 2024-06-02T00:06:29 55.18588 -35.43984 6.5 0.75 0.09 0.11 2024-06-02T08:51:00 2024-06-02T09:11:52 54.28691 -38.19930 6.5 1.64 0.27 0.16 2024-06-02T13:02:00 2024-06-02T13:23:15 53.90098 -39.27228 6.5 1.08 0.15 0.14 2024-06-02T18:24:00 2024-06-02T18:45:22 53.63094 -39.99517 6.5 1.15 0.23 0.20 MSM129/1_6-1 2024-06-02T18:51:00 53.63094 -39.99517 10.0 1.40 0.18 0.14 MSM129/1_6-1 2024-06-02T18:42:00 53.63094 -39.99517 20.0 1.02 0.17 0.05 MSM129/1_6-1 2024-06-02T18:41:00 53.63094 -39.99517 40.0 0.35 0.10 0.01 MSM129/1_6-1 2024-06-02T18:40:00 53.63094 -39.99517 60.0 0.10 0.03 0.00 MSM129/1_6-1 2024-06-02T18:39:00 53.63094 -39.99517 100.0 0.04 0.04 0.00 2024-06-03T01:16:00 2024-06-03T01:37:19 52.92001 -41.80892 6.5 1.40 0.19 0.13 2024-06-03T09:02:00 2024-06-03T09:23:27 52.03164 -43.90541 6.5 1.56 0.14 0.09 2024-06-03T12:46:00 2024-06-03T13:04:18 51.59508 -44.87592 6.5 1.09 -0.01 -0.01 2024-06-03T20:46:00 2024-06-03T21:04:23 50.96965 -46.21050 6.5 1.55 0.09 0.06 MSM129/1_7-1 2024-06-03T21:09:00 50.96949 -46.21025 10.0 2.10 0.27 0.21 MSM129/1_7-1 2024-06-03T21:00:00 50.96949 -46.21025 20.0 1.46 0.25 0.07 MSM129/1_7-1 2024-06-03T20:59:00 50.96949 -46.21025 35.0 0.46 0.26 0.01 MSM129/1_7-1 2024-06-03T20:59:00 50.96949 -46.21025 50.0 0.45 0.22 0.01 MSM129/1_7-1 2024-06-03T20:58:00 50.96949 -46.21025 70.0 0.09 0.13 0.00 2024-06-04T00:41:00 2024-06-04T00:59:08 50.58500 -46.99381 6.5 1.30 0.15 0.12 2024-06-04T09:56:00 2024-06-04T10:13:30 49.78299 -48.56339 6.5 0.15 0.05 0.32