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Choisnard, Noémie; Moros, Matthias; Voss, Maren (2023): Sediment solid phase characteristics on the Amazon shelf obtained in April/May 2021 during RV METEOR cruise M174 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961264

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Abstract:
The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (https://doi.org/10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, a MUC was deployed at eight stations to collect short sediment cores, in order to explore the influence of the river on sediments. This dataset presents the results of sediment solid phase characteristics from the surface sediment down to 30 cm depth.
Keyword(s):
Amazon River; Benthic fluxes; M174; nitrogen; nitrous oxide; porewater; sediment
Supplement to:
Choisnard, Noémie; Burtscher, Emma; Forster, Stefan; Frey, Claudia; Moros, Matthias; Voss, Maren (2023): The Amazon shelf sediments, a reactor that fuels intense nitrogen cycling at the seabed. Limnology and Oceanography, https://doi.org/10.1002/lno.12416
Related to:
Voss, Maren (2021): Master tracks in different resolutions of METEOR cruise M174, Las Palmas - Emden, 2021-04-12 - 2021-05-29. PANGAEA, https://doi.org/10.1594/PANGAEA.935041
References:
Fry, Brian (2006): Stable Isotope Ecology. Springer New York, NY, https://doi.org/10.1007/0-387-33745-8
Leipe, Thomas; Moros, Matthias; Kotilainen, Aarno T; Vallius, Henry; Kabel, Karoline; Endler, Michael; Kowalski, Nicole (2013): Mercury in Baltic Sea sediments—Natural background and anthropogenic impact. Chemie der Erde-Geochemistry, 73(3), 249-259, https://doi.org/10.1016/j.chemer.2013.06.005
Ragueneau, Olivier; Tréguer, Paul (1994): Determination of biogenic silica in coastal waters: applicability and limits of the alkaline digestion method. Marine Chemistry, 45(1-2), 43-51, https://doi.org/10.1016/0304-4203(94)90090-6
Schulz, Horst D; Zabel, Matthias (2006): Marine Geochemistry. Springer-Verlag, Berlin/Heidelberg, https://doi.org/10.1007/3-540-32144-6
Shepard, Francis Parker (1954): Nomenclature based on sand-silt-clay ratios. Journal of Sedimentary Research, 24, 151-158, https://doi.org/10.1306/D4269774-2B26-11D7-8648000102C1865D
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 439440452: Metabolismus des Stickstoffs in der Amazonasfahne und dem westlichen, tropischen Nordatlantik (MeNARP)
Coverage:
Median Latitude: 2.474670 * Median Longitude: -49.427161 * South-bound Latitude: -0.597570 * West-bound Longitude: -52.557300 * North-bound Latitude: 6.172620 * East-bound Longitude: -47.731500
Date/Time Start: 2021-04-23T09:38:51 * Date/Time End: 2021-05-05T18:15:36
Minimum Elevation: -85.0 m * Maximum Elevation: -15.0 m
Event(s):
M174_9-9 * Latitude Start: -0.121800 * Longitude Start: -47.731500 * Latitude End: -0.121800 * Longitude End: -47.731500 * Date/Time Start: 2021-04-23T09:38:51 * Date/Time End: 2021-04-23T09:43:09 * Elevation Start: -35.0 m * Elevation End: -34.0 m * Location: South Atlantic Ocean * Campaign: M174 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC)
M174_10-9 * Latitude: -0.597570 * Longitude: -48.260520 * Date/Time: 2021-04-23T17:38:02 * Elevation: -15.0 m * Location: South Atlantic Ocean * Campaign: M174 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC)
M174_13-11 * Latitude: 1.050780 * Longitude: -48.584200 * Date/Time: 2021-04-24T19:37:09 * Elevation: -17.0 m * Location: South Atlantic Ocean * Campaign: M174 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventChoisnard, Noémie
2Station labelStationChoisnard, Noémie
3DATE/TIMEDate/TimeChoisnard, NoémieGeocode
4LATITUDELatitudeChoisnard, NoémieGeocode
5LONGITUDELongitudeChoisnard, NoémieGeocode
6ELEVATIONElevationm a.s.l.Choisnard, NoémieGeocode
7DEPTH, sediment/rockDepth sedmChoisnard, NoémieMultiCorer (MUC)Geocode
8Depth, sediment/rock, top/minimumDepth sed topmChoisnard, Noémie
9Depth, sediment/rock, bottom/maximumDepth sed botmChoisnard, Noémie
10Porosity, volumePoros volChoisnard, NoémieCalculated according to Schulz and Zabel (2006)
11TortuosityTortuosityChoisnard, NoémieCalculatedCalculated from porosity
12δ15N, total nitrogenδ15N TN‰ airChoisnard, NoémieElemental analyser isotope ratio mass spectrometer (EA-IRMS) system, Thermo Fisher Scientific, EA Isolink
13δ13C, particulate organic carbonδ13C POC‰ PDBChoisnard, NoémieElemental analyser isotope ratio mass spectrometer (EA-IRMS) system, Thermo Fisher Scientific, EA Isolink
14Nitrogen, totalTNµmol/mgChoisnard, NoémieElemental analyser isotope ratio mass spectrometer (EA-IRMS) system, Thermo Fisher Scientific, EA Isolink
15Carbon, organic, particulatePOCµmol/mgChoisnard, NoémieElemental analyser isotope ratio mass spectrometer (EA-IRMS) system, Thermo Fisher Scientific, EA Isolink
16Carbon, organic, particulate/Nitrogen, total ratioPOC/TNChoisnard, NoémieCalculated
17Biogenic silicabSiO2%Choisnard, NoémieAlkaline digestion method according to Ragueneau and Tréguer (1994)weight percentage (wt%)
18Components, terrestrialComp ter%Choisnard, NoémieCalculated according to Fry (2006)
19Components, marineComp marine%Choisnard, NoémieCalculated according to Fry (2006)
20MercuryHgµg/kgChoisnard, NoémieMeasured according to Leipe et al. (2013)
21Caesium-137137CsBq/kgChoisnard, NoémieGamma spectrometer, Canberra, Ge-detector BE3830-7500SL-RDC-6-ULB; coupled with well detector, Canberra, GCW4021-7500SL-RDC-6-ULB [GENIE 2000 software]
22Caesium-137, error137Cs e±Choisnard, Noémie
23Lead-210, unsupported210Pb unsupBq/kgChoisnard, NoémieGamma spectrometer, Canberra, Ge-detector BE3830-7500SL-RDC-6-ULB; coupled with well detector, Canberra, GCW4021-7500SL-RDC-6-ULB [GENIE 2000 software]
24Lead-210, unsupported, error210Pb unsup e±Choisnard, Noémie
25Size fraction < 0.063 mm, mud, silt+clay<63 µm%Choisnard, NoémieCalculated according to Shepard (1954)
26Size fraction 2.100-0.076 mm, sand2100-76 µm%Choisnard, NoémieCalculated according to Shepard (1954)
27Size fraction 0.067-0.002 mm, silt67-2 µm%Choisnard, NoémieCalculated according to Shepard (1954)
28Size fraction < 0.002 mm, clay<2 µm%Choisnard, NoémieCalculated according to Shepard (1954)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1377 data points

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