de.pangaea.dataset950655 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-04-29T20:43:11Z https://doi.pangaea.de/10.1594/PANGAEA.950655 2024-11-01T00:03:06 publication https://doi.org/10.1594/PANGAEA.950655 Robinson, Tiera-Brandy

brobinson@geomar.de

https://orcid.org/0000-0001-7948-800X information author PANGAEA

info@pangaea.de

https://www.pangaea.de/ information publisher tableDigital As part of the MOCCHA 2018 campaign onboard I/B Oden, Sea surface microlayer (SML) and underlying water (ULW) samples were taken from an open lead system in the central arctic. Sampling occured during the autumn freeze-up from 18.08.18 - 08.09.18. Latitude ranged from 88.7644-89.5474 degrees and longitude ranged from 38.1087-45.7652 degrees as the ice pack moved over time, elevevation remained 0. Sea surface microlayer samples were collected using the glass plate technique (Harvey and Burzell, 1972, doi:10.4319/lo.1972.17.1.0156) via rotating glass disks equipped to a catamaran and underlying water samples were collected from 1 meter depth. Seven variables were sampled for; transparent exopolymer particles (TEP), coomassie stainable particles (CSP), surfactants, chlorophyll a, particulate organic carbon (POC), particulate organic nitrogen (PON) and particulate organic phosphorous (POP). Their concentrations are presented here in micrograms per litre. sea surface microlayer (SML) and undrlaying water (ULW) samples were brought back to a wet lab onboard I/B Oden. All samples were stored in their respective states until processing and analysis could be done after the expedition in laboratories of the University of Oldenburg. Transparent exopolymer particles (TEP) were measured by filtering seawater, in triplicates, onto 0.2 µm polycarbonate filters under low vacuum (< 100mmHg) and staining with alcian blue solution (0.02 g alcian blue in 100mL of acetic acid solution of pH 2.5) for 5 s. The 0.2 µm filters collect both large TEP aggregates and smaller colloidal TEP material. Filters were placed in Eppendorf tubes and stored at -18 °C until processing back in the home laboratory. In the laboratory, Alcian blue stain was extracted for 2 h in 80% sulfuric acid, with gentle agitation applied to reduce bubble formation, and analysed using a spectrophotometer (VWR UV-1600PC, precision of 1±0.2%T) following (Passow and Alldredge, 1995, doi:10.4319/lo.1995.40.7.1326.). The stock solution of Alcian blue was calibrated using the xanthan gum (Carl Roth) standard according to Passow and Alldredge (1995). TEP concentrations are shown in relation to xanthan gum equivalence (µg XG eq. L-1). Recent calibration issues noted by Bittar et al. (2018, doi:10.1002/lom3.10268) were not observed in our studies, and thus their new method was not required. Coomassie stainable particles (CSP) were measured by filtering seawater, in triplicates, onto 0.2 µm polycarbonate filters under low vacuum (< 100mmHg) and staining with Coomassie brilliant blue (0.04% in filtered seawater solution with a pH of 7.4) for 30 s. Filters were stored at -18°C until processing back in the home laboratory. In the laboratory, stained filters were placed in glass vials with 10ml of extraction solution (3% SDS in 50% isopropyl alcohol) and gently agitated for 2 hours. Sonication as suggested by Cisternas-Novoa et al. (2014) always resulted in deterioration and consequential contamination by filters, thus only continuous gentle agitation was applied and showed to be sufficient in extracting the stain from the filters into the solution. Extracted stain was then analysed using a spectrophotometer (VWR UV-1600PC, precision of 1±0.2%T) following (Cisternas-Novoa et al., 2014, doi:10.4319/lom.2014.12.604.). Surfactant concentrations were measured using a voltammetry instrument (VA Stand 747, Metrohm, Switzerland) which incorporates a hanging mercury drop electrode (Ćosović, B., and Vojvodić, V. (1998, doi:10.1002/(SICI)1521-4109(199805)10:6<429::AID-ELAN429>3.0.CO;2-7) and measures surfactants as bulk concentrations. Under stirring for roughly 30 seconds, surfactants accumulate at the hanging mercury drop electrode at a potential of -0.6 V versus an Ag/AgCl reference electrode. The frequency of the A.C. voltage was 170 Hz and the p-p amplitude was 10 mV. With a sampling rate of 20 mV s-1, the phase-shifted signal of the A.C. current was measured to quantify the amount of surfactants accumulating on the Hg drop. For sample evaluation, 10ml of unfiltered seawater were collected and stored at 4°C in the dark until they could be analysed back in the home laboratory. Each sample was measured three to four times using a standard addition technique involving the non-ionic surfactant Triton X-100 (Sigma Aldrich, Germany) as the standard. Surfactant concentrations are therefore expressed as the equivalent concentration of Triton X-100 addition (µg Teq L-1). completed Robinson, Tiera-Brandy

brobinson@geomar.de

https://orcid.org/0000-0001-7948-800X information principalInvestigator Arctic open leads SML theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact MOCCHA Microbiology-Ocean-Cloud-Coupling in the High Arctic theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -129.5 47.9987 88.9178 89.6052 2018-08-18T00:00:00 2018-09-06T00:00:00 Event label thematicClassification Date/Time of event thematicClassification Latitude of event thematicClassification Longitude of event thematicClassification Transparent exopolymer particles physicalMeasurement Sea surface microlayer (average of 3 replicates) µg/l µg/l Transparent exopolymer particles physicalMeasurement Underlying water (average of 3 replicates) µg/l µg/l Coomassie stainable particles physicalMeasurement Sea surface microlayer (average of 3 replicates) µg/l µg/l Coomassie stainable particles physicalMeasurement Underlying water (average of 3 replicates) µg/l µg/l Surfactants physicalMeasurement Sea surface microlayer (average of 3 replicates) µg/l µg/l Surfactants physicalMeasurement Underlying water (average of 3 replicates) µg/l µg/l Chlorophyll a physicalMeasurement After Wasmund et al. (2006); Sea surface microlayer µg/l µg/l Chlorophyll a physicalMeasurement After Wasmund et al. (2006); Underlying water µg/l µg/l Carbon, organic, particulate physicalMeasurement Elemental analyzer, CARLO ERBA, Flash 1112; Sea surface microlayer µg/l µg/l Carbon, organic, particulate physicalMeasurement Elemental analyzer, CARLO ERBA, Flash 1112; Underlying water µg/l µg/l Nitrogen, organic, particulate physicalMeasurement Elemental analyzer, CARLO ERBA, Flash 1112; Sea surface microlayer µg/l µg/l Nitrogen, organic, particulate physicalMeasurement Elemental analyzer, CARLO ERBA, Flash 1112; Underlying water µg/l µg/l Phosphorus, organic, particulate physicalMeasurement After Wetzel and Likens (2000); Sea surface microlayer µg/l µg/l Phosphorus, organic, particulate physicalMeasurement After Wetzel and Likens (2000); Underlying water µg/l µg/l text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.950655?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: Oden_AO2018_01 * LATITUDE: 89.551700 * LONGITUDE: -129.500000 * DATE/TIME: 2018-08-18T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-18T00:00:00 EVENT LABEL: Oden_AO2018_02 * LATITUDE: 89.565100 * LONGITUDE: -128.500000 * DATE/TIME: 2018-08-19T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-19T00:00:00 EVENT LABEL: Oden_AO2018_03 * LATITUDE: 89.543200 * LONGITUDE: -127.520800 * DATE/TIME: 2018-08-20T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-20T00:00:00 EVENT LABEL: Oden_AO2018_04 * LATITUDE: 89.552700 * LONGITUDE: -126.250000 * DATE/TIME: 2018-08-21T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-21T00:00:00 EVENT LABEL: Oden_AO2018_05 * LATITUDE: 89.529600 * LONGITUDE: -125.488200 * DATE/TIME: 2018-08-22T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-22T00:00:00 EVENT LABEL: Oden_AO2018_06 * LATITUDE: 89.515900 * LONGITUDE: -123.500000 * DATE/TIME: 2018-08-24T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-24T00:00:00 EVENT LABEL: Oden_AO2018_07 * LATITUDE: 89.605200 * LONGITUDE: -121.511800 * DATE/TIME: 2018-08-26T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-26T00:00:00 EVENT LABEL: Oden_AO2018_08 * LATITUDE: 89.561500 * LONGITUDE: -119.479200 * DATE/TIME: 2018-08-28T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-28T00:00:00 EVENT LABEL: Oden_AO2018_09 * LATITUDE: 89.490700 * LONGITUDE: -118.500000 * DATE/TIME: 2018-08-29T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-08-29T00:00:00 EVENT LABEL: Oden_AO2018_10 * LATITUDE: 89.393800 * LONGITUDE: -115.500000 * DATE/TIME: 2018-09-01T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-09-01T00:00:00 EVENT LABEL: Oden_AO2018_11 * LATITUDE: 88.939700 * LONGITUDE: -111.500000 * DATE/TIME: 2018-09-05T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-09-05T00:00:00 EVENT LABEL: Oden_AO2018_12 * LATITUDE: 88.917800 * LONGITUDE: 47.998700 * DATE/TIME: 2018-09-06T00:00:00 * LOCATION: Central Arctic * CAMPAIGN: Oden_AO2018 * BASIS: Oden * METHOD/DEVICE: Open-Line-System Median coordinates 2018-09-06T00:00:00 Related to 2024-01-01 publication https://doi.org/10.1594/PANGAEA.950656 Robinson, Tiera-Brandy

brobinson@geomar.de

https://orcid.org/0000-0001-7948-800X information author documentDigital Further details 2006-01-01 publication http://www.iopan.gda.pl/oceanologia/481wasmu.pdf Wasmund, Norbert

norbert.wasmund@io-warnemuende.de

https://orcid.org/0000-0002-7979-7176 information author Topp, Ina author Schories, Dirk

dschories@zmt.uni-bremen.de

author documentDigital Oceanologia 48(1) 125-144 Further details 1991-01-01 publication Wetzel, Robert G author Likens, Gene author documentHardcopy Springer New York