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Galgani, Luisa; Piontek, Judith; Engel, Anja (2016): Biopolymers form a gelatinous microlayer at the air-sea interface when Arctic sea ice melts. PANGAEA, https://doi.org/10.1594/PANGAEA.871643, Supplement to: Galgani, L et al. (2016): Biopolymers form a gelatinous microlayer at the air-sea interface when Arctic sea ice melts. Scientific Reports, 6, 29465, https://doi.org/10.1038/srep29465

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Abstract:
The interface layer between ocean and atmosphere is only a couple of micrometers thick but plays
a critical role in climate relevant processes, including the air-sea exchange of gas and heat and the
emission of primary organic aerosols (POA). Recent findings suggest that low-level cloud formation
above the Arctic Ocean may be linked to organic polymers produced by marine microorganisms. Sea
ice harbors high amounts of polymeric substances that are produced by cells growing within the seaice
brine. Here, we report from a research cruise to the central Arctic Ocean in 2012. Our study shows
that microbial polymers accumulate at the air-sea interface when the sea ice melts. Proteinaceous
compounds represented the major fraction of polymers supporting the formation of a gelatinous
interface microlayer and providing a hitherto unrecognized potential source of marine POA. Our study
indicates a novel link between sea ice-ocean and atmosphere that may be sensitive to climate change.
Coverage:
Median Latitude: 84.206481 * Median Longitude: 95.717560 * South-bound Latitude: 82.090000 * West-bound Longitude: 31.223610 * North-bound Latitude: 87.929720 * East-bound Longitude: 131.130800
Date/Time Start: 2016-08-10T00:00:00 * Date/Time End: 2016-09-19T00:00:00
Minimum DEPTH, water: 0.20 m * Maximum DEPTH, water: 0.53 m
Event(s):
PS80/224-1 (Ice station #1) * Latitude Start: 84.050500 * Longitude Start: 31.113830 * Latitude End: 84.033833 * Longitude End: 31.109500 * Date/Time Start: 2012-08-09T08:08:00 * Date/Time End: 2012-08-11T12:23:00 * Elevation Start: -4013.0 m * Elevation End: -4011.0 m * Campaign: ARK-XXVII/3 (PS80 IceArc) * Basis: Polarstern * Device: Ice station (ICE) * Comment: Position sensor: Ship's GPS; Wind speed start: 0.2 kn; Wind speed end: 0.2 kn; Sea ice coverage start: 95 %; Sea ice coverage end: 95 %
PS80/237-1 (Ice station #2) * Latitude Start: 83.986500 * Longitude Start: 78.103330 * Latitude End: 83.933667 * Longitude End: 75.504667 * Date/Time Start: 2012-08-14T13:10:00 * Date/Time End: 2012-08-16T18:42:00 * Elevation Start: -3484.0 m * Elevation End: -3424.0 m * Campaign: ARK-XXVII/3 (PS80 IceArc) * Basis: Polarstern * Device: Ice station (ICE) * Comment: Position sensor: Ship's GPS; Wind speed start: 0.3 kn; Wind speed end: 0.6 kn; Sea ice coverage start: 90 %; Sea ice coverage end: 80 %
PS80/3-track * Latitude Start: 69.678000 * Longitude Start: 18.989800 * Latitude End: 53.563960 * Longitude End: 8.548130 * Date/Time Start: 2012-08-02T12:00:00 * Date/Time End: 2012-10-08T06:00:00 * Location: Arctic Ocean, Central Basin * Campaign: ARK-XXVII/3 (PS80 IceArc) * Basis: Polarstern * Device: Underway cruise track measurements (CT)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEventEngel, Anja
2DATE/TIMEDate/TimeEngel, AnjaGeocode
3LATITUDELatitudeEngel, AnjaGeocode
4LONGITUDELongitudeEngel, AnjaGeocode
5DEPTH, waterDepth watermEngel, AnjaGeocode
6SiteSiteEngel, Anja
7Sample code/labelSample labelEngel, Anja
8SalinitySalEngel, Anja
9DescriptionDescriptionEngel, Anja
10Carbon, organic, dissolvedDOCµmol/lEngel, Anja
11Amino acids, dissolved hydrolyzableDHAAnmol/lEngel, Anja
12Uronic acids, dissolvedDURAnmol/lEngel, Anja
13Amino acids, dissolved hydrolyzableDHAAnmol/lEngel, AnjaDHAA-C
14Uronic acids, dissolvedDURAnmol/lEngel, AnjaDURA-C
15BacteriaBact#/mlEngel, Anja10**5 cells/ml
16Coomassie stainable particlesCSP#/µlEngel, Anja
17Coomassie stainable particlesCSPµm2/lEngel, Anjaarea sml
18Slope ratioSREngel, AnjaCSP slope sml
19Transparent exopolymer particlesTEP#/µlEngel, Anja
20Transparent exopolymer particlesTEPµm2/lEngel, Anjaarea sml
21Slope ratioSREngel, AnjaTEP slope sml
Size:
567 data points

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