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Rahlff, Janina (2017): Net community production and respiration of oxygen in the sea-surface microlayer, 1 m and 5 m depth during METEOR cruise M117, Baltic Sea and FALKOR cruise FK161010 Pacific Ocean. PANGAEA,, Supplement to: Rahlff, Janina; Stolle, Christian; Wurl, Oliver (2017): SISI: A new device for in situ incubations at the ocean surface. Journal of Marine Science and Engineering, 5(4), 46,

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The sea-surface microlayer (SML) forms the uppermost boundary layer between atmosphere and ocean, and has distinctive physico-chemical and biological features compared to the underlying water. First findings on metabolic contributions of microorganisms to gas exchange processes across the SML raised the need for new in situ technologies to explore plankton-oxygen turnover in this special habitat. Here, we describe an inexpensive research tool, the Surface In Situ Incubator (SISI), which allows simultaneous incubations of the SML, and water samples from 1 m and 5 m, at the respective depths of origin. The SISI is deployed from a small boat, seaworthy up to 5 bft (Beaufort scale), and due to global positioning system (GPS) tracking, capable of drifting freely for hours or days. We tested the SISI by applying light/dark bottle incubations in the Baltic Sea and the tropical Pacific Ocean under various conditions to present first data on planktonic oxygen turnover rates within the SML, and two subsurface depths. The SISI offers the potential to study plankton-oxygen turnover within the SML under the natural influence of abiotic parameters, and hence, is a valuable tool to routinely monitor their physiological role in biogeochemical cycling and gas exchange processes at, and near, the sea surface.
Median Latitude: 39.932395 * Median Longitude: 60.646803 * South-bound Latitude: 3.634700 * West-bound Longitude: 16.718830 * North-bound Latitude: 59.768170 * East-bound Longitude: 145.203800
Date/Time Start: 2015-08-03T00:00:00 * Date/Time End: 2016-11-01T00:00:00
Minimum DEPTH, water: 0.001 m * Maximum DEPTH, water: 5.000 m
FK161010_9 * Latitude: 3.851500 * Longitude: 137.994200 * Date/Time: 2016-10-28T00:00:00 * Location: Papua New Guinea * Campaign: FK161010 (PASSME) * Basis: Falkor
FK161010_13 * Latitude: 3.634700 * Longitude: 145.203800 * Date/Time: 2016-11-01T00:00:00 * Location: Papua New Guinea * Campaign: FK161010 (PASSME) * Basis: Falkor
M117_609-9 * Latitude Start: 56.286000 * Longitude Start: 16.718830 * Latitude End: 56.286000 * Longitude End: 16.718830 * Date/Time Start: 2015-08-03T08:04:00 * Date/Time End: 2015-08-03T08:21:59 * Elevation Start: -62.3 m * Elevation End: -62.2 m * Location: Baltic Sea * Campaign: M117 * Basis: Meteor (1986) * Method/Device: Buoy (BUOY)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventRahlff, Janina
2Latitude of eventLatitudeRahlff, Janina
3Longitude of eventLongitudeRahlff, Janina
4Station labelStationRahlff, Janina
5DATE/TIMEDate/TimeRahlff, JaninaGeocode
6DEPTH, waterDepth watermRahlff, JaninaGeocode
7ReplicateReplRahlff, Janina
8Net community production of oxygenNCP O2µmol/l/hRahlff, Janina
9Net community respiration rate, oxygenNCR O2µmol/l/hRahlff, Janina
130 data points

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