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Cardozo-Mino, Magda Guadalupe; Merder, Julian; Dittmar, Thorsten; Boetius, Antje; Wietz, Matthias: Dissolved organic matter composition during a sea-ice melt experiment with sea-ice and seawater from Fram Strait [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.978551 (dataset in review)

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Abstract:
This dataset originates from a microcosm experiment conducted in the Fram Strait to monitor microbial and chemical changes during sea-ice melt. It includes the molecular composition of dissolved organic matter (DOM) analyzed using Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). The code used to analyze the data can be found here: https://github.com/matthiaswietz/Arctic_IceSeeding. DOM composition was measured on a SolariX XR FT-ICR-MS (Bruker Daltonik GmbH, Bremen, Germany), featuring a 15 Tesla superconducting magnet and equipped with a Bruker Apollo II electrospray ionization (ESI) source. Molecular formula attribution included the elements C (1–100), ¹³C (0–2), H (1–200), O (0–50), ¹⁸O (0–1), N (0–4), ¹⁵N (0–1), S (0–2), ³⁴S (0–1), and P (0–1), with a matching tolerance of 0.5 ppm. When multiple molecular formulae matched a given mass, preference was given to those with isotope verification. Isotope verification required the presence of at least one isotopologue with an intensity ratio deviation within ±1000 permille of natural abundance for Δ¹³C, Δ¹⁸O, Δ¹⁵N, and Δ³⁴S. If multiple isotope-verified formulae remained, the formula with the largest homologous series network, defined by CH₂ and O patterns, was selected.
Keyword(s):
DOM; experiment; Field experiment; Fram Strait; FT-ICR MS; Ice Melt; microcosm
Project(s):
FRontiers in Arctic marine Monitoring (FRAM)
Long-term Investigation at AWI-Hausgarten off Svalbard (LTO_Hausgarten)
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS121_07: Temporal variability of nutrient and carbon transports into and out of the arctic ocean
Seventh Framework Programme (FP7), grant/award no. 294757: Assessment of bacterial life and matter cycling in deep-sea surface sediments
Coverage:
Latitude: 79.733025 * Longitude: 4.471498
Date/Time Start: 2019-09-05T23:54:25 * Date/Time End: 2019-09-05T23:54:25
Minimum Elevation: -2667.7 m * Maximum Elevation: -2667.7 m
Event(s):
PS121_43-6 * Latitude: 79.733025 * Longitude: 4.471498 * Date/Time: 2019-09-05T23:54:25 * Elevation: -2667.7 m * Location: North Greenland Sea * Campaign: PS121 * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Type of studyStudy typeCardozo-Mino, Magda Guadalupe
2Molecular formulaFormulaCardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
3Mass-to-charge ratiom/zCardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
4Carbon, number of atomsC atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
5Hydrogen, number of atomsH atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
6Oxygen, number of atomsO atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
7Nitrogen, number of atomsN atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
8Sulfur, number of atomsS atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
9Phosphorus, number of atomsP atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
10Carbon-13, number of atoms13C atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
11Nitrogen-15, number of atoms15N atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
12Oxygen-18, number of atoms18O atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
13Sulfur-34, number of atoms34S atoms#Cardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)
14Aromaticity index, modifiedAI modCardozo-Mino, Magda Guadalupe
15IntensityIntensityCardozo-Mino, Magda GuadalupeFourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)signal intensity of the ion (not normalized)
16Number of observationsNOBS#Cardozo-Mino, Magda Guadalupenumber of isotopic patterns that verify the molecular formula
17Sample IDSample IDCardozo-Mino, Magda Guadalupetechnical duplicates (replicates of the same sample)
18Time point, descriptiveTime pointCardozo-Mino, Magda Guadalupetime at which the sample was collected during the experiment
19Experimental conditionExp conditionCardozo-Mino, Magda Guadalupe"original ice core" (OrgIce), "original seawater" (OrgSW), "lab incubation" (IceMelt, Ctr)
20IdentificationIDCardozo-Mino, Magda Guadalupecore id
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
5000660 data points

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