Phytoplankton absorption during SONNE cruise SO235 in the Indian Ocean


Water samples were taken during the expedition OASIS (Organic very short lived substances and their Air–Sea exchange from the Indian Ocean to the Stratosphere) cruise (SO235) in the Indian Ocean on board the R/V Sonne I from Port Louis, Mauritius, to Malé, Maldives from 23 July to 6 of August 2014 (see Fig. 1 in Booge et al. 2018). Water samples were collected from ship's moonpool during underway and from CTD Niskin bottles at six different depths from the upper 150 m. All collected samples were filtered through 25 cm Whatman GF/F filters, respectively, under low-vacuum pressure (below 200 mbar), and then immediately shock-frozen in liquid nitrogen and stored at −80°C for later analysis in the lab. Measurements of the phytoplankton absorption were carried out on a dual-beam UV/VIS spectrophotometer (Cary 4000, Varian Inc.) equipped with a 150 mm integrating sphere (external DRA-900, Varian, Inc. and Labsphere Inc., made from Spectralon (TM)) using a quantitative filterpad technique modified as described in details in Taylor et al. (2011). The data set is also collocated to Bracher et al. (2019) phytoplankton pigment data and Bracher and Wiegmann (2021) particulate absorption data.

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Metadata Access
Creator Bracher, Astrid; Wiegmann, Sonja
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2021
Funding Reference Federal Ministry of Education and Research, 03G0235A
Rights Data access is restricted (moratorium, sensitive data, license constraints)
OpenAccess false
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 116340 data points
Discipline Earth System Research
Spatial Coverage (57.449W, -19.974S, 74.105E, 3.066N); Indian Ocean; Arabian Sea
Temporal Coverage Begin 2014-07-23T12:30:00Z
Temporal Coverage End 2014-08-06T05:00:00Z