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Dausmann, Veit; Frank, Martin; Zieringer, Moritz (2019): Dissolved Hafnium and Neodymium data measured on water samples during METEOR cruise M84/5 in the Bay of Biscay. PANGAEA, https://doi.org/10.1594/PANGAEA.902808, Supplement to: Dausmann, V et al. (2020): Water mass mixing versus local weathering inputs along the Bay of Biscay: Evidence from dissolved hafnium and neodymium isotopes. Marine Chemistry, 224, 103844, https://doi.org/10.1016/j.marchem.2020.103844

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Abstract:
We present dissolved neodymium and hafnium concentrations and radiogenic isotope compositions of surface and deep-water masses from the Bay of Biscay. Neodymium isotope signatures in surface waters of the Bay of Biscay are dominated by local weathering inputs from the surrounding continental margin. Subsurface Eastern North Atlantic Central Water (ENACW) shows a distinct Nd isotope signature (εNd≅‑12.0) at the southwestern-most station and is significantly diluted by mixing with more radiogenic waters on its way north along the European margin. Furthermore, the Nd isotope data clearly show a declining fraction of Mediterranean Outflow Water (MOW) at intermediate depths on its way north indicating that only 40% to 60% of MOW still present in the mixture at the Galician margin arrive at the stations further north in the Bay of Biscay. A potentially seasonal variability of the flow path of MOW is identified when comparing the results of the Nd isotope compositions and salinity data of this study with those of earlier studies from the area.
In agreement with Nd isotope and concentration analyses Hf isotope composition of MOW is affected by large-scale inputs of terrigenous material into the Mediterranean as can be deduced from elevated Hf concentrations at the Galician margin. Hf isotope signatures of all water masses of the Bay of Biscay, moreover, are overprinted by local weathering inputs and do not reflect water mass mixing. However, combined dissolved Nd and Hf isotopes serve as a useful indicator of local weathering influences on signatures expected from long distance admixture.
Coverage:
Median Latitude: 44.232651 * Median Longitude: -5.479520 * South-bound Latitude: 42.991550 * West-bound Longitude: -9.718670 * North-bound Latitude: 46.232500 * East-bound Longitude: -2.616500
Date/Time Start: 2011-06-02T00:00:00 * Date/Time End: 2011-06-17T00:00:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 3250 m
Event(s):
M84/5_559  * Latitude: 43.005000 * Longitude: -9.718670 * Date/Time: 2011-06-02T06:22:00 * Elevation: -2344.0 m * Location: South Atlantic Ocean * Campaign: M84/5 * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M84/5_560  * Latitude: 43.005000 * Longitude: -9.718330 * Date/Time: 2011-06-02T09:27:00 * Elevation: -2350.0 m * Location: South Atlantic Ocean * Campaign: M84/5 * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M84/5_576  * Latitude: 44.132170 * Longitude: -6.001500 * Date/Time: 2011-06-05T01:01:00 * Elevation: -3295.0 m * Location: Bay of Biscay * Campaign: M84/5 * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEventDausmann, Veit
Date/Time of eventDate/TimeDausmann, Veit
Latitude of eventLatitudeDausmann, Veit
Longitude of eventLongitudeDausmann, Veit
Elevation of eventElevationmDausmann, Veit
Area/localityAreaDausmann, Veit
DEPTH, waterDepth watermDausmann, VeitGeocode
VolumeVollDausmann, Veit
Hafnium-176/Hafnium-177176Hf/177HfDausmann, Veit
10 Hafnium-176/Hafnium-177, standard deviation176Hf/177Hf std dev±Dausmann, Veit
11 ε-Hafniumε-HfDausmann, Veit
12 ε-Hafnium, standard deviationε-Hf std dev±Dausmann, Veit
13 ε-Neodymiumε-NdDausmann, Veit
14 ε-Neodymium, standard deviationε-Nd std dev±Dausmann, Veit
15 Hafnium, dissolvedHf disspmol/kgDausmann, Veit
16 Neodymium, dissolvedNd disspmol/kgDausmann, Veit
17 Temperature, waterTemp°CDausmann, Veit
18 SalinitySalDausmann, Veit
Size:
452 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Event

Date/Time

Latitude

Longitude

Elevation [m]

Area

Depth water [m]

Vol [l]

176Hf/177Hf
10 
176Hf/177Hf std dev [±]
11 
ε-Hf
12 
ε-Hf std dev [±]
13 
ε-Nd
14 
ε-Nd std dev [±]
15 
Hf diss [pmol/kg]
16 
Nd diss [pmol/kg]
17 
Temp [°C]
18 
Sal
M84/5_SW01 2011-06-0242.9915-9.6684-3I31400.2828310.0000061.60.20-10.50.1119.88
M84/5_560 2011-06-0243.0050-9.7183-2350I25020-11.80.200.5616.9012.5735.79
M84/5_5602011-06-0243.0050-9.7183-2350I48080-12.10.070.5415.6011.3935.62
M84/5_5602011-06-0243.0050-9.7183-2350I800200.2827790.000014-0.20.50-10.70.080.8519.3011.4736.07
M84/5_5602011-06-0243.0050-9.7183-2350I1100800.2827950.0000070.40.24-10.10.080.8218.2010.9836.17
M84/5_559 2011-06-0243.0050-9.7187-2344I1300200.2827680.000016-0.60.55-10.80.100.8719.409.9836.06
M84/5_5592011-06-0243.0050-9.7187-2344I1500800.2828240.0000071.40.25-11.30.090.8216.307.4235.61
M84/5_5592011-06-0243.0050-9.7187-2344I170020-12.20.300.8717.305.0335.22
M84/5_5592011-06-0243.0050-9.7187-2344I186980-11.40.090.8117.304.2535.11
M84/5_5592011-06-0243.0050-9.7187-2344I230080-12.00.100.9017.903.0934.98
M84/5_SW02 2011-06-0443.8463-7.8971-3II320-9.40.1221.29
M84/5_SW03 2011-06-0544.0746-5.9906-3III3140-10.80.0916.06
M84/5_577 2011-06-0544.1322-6.0013-3326III200200.2827670.000015-0.60.54-11.40.100.4515.4011.6335.66
M84/5_5772011-06-0544.1322-6.0013-3326III450700.2829420.000005-11.40.130.4415.0011.4135.64
M84/5_615 2011-06-0943.9883-5.7262-620III511800.2828530.0000062.40.21-11.30.100.5115.4011.2935.63
M84/5_6152011-06-0943.9883-5.7262-620III60980-11.70.110.5815.9010.9335.62
M84/5_5772011-06-0544.1322-6.0013-3326III70020-11.60.140.9016.2010.6635.65
M84/5_589 2011-06-0644.0233-5.7028-764III76020-11.60.090.7616.5010.6535.72
M84/5_5772011-06-0544.1322-6.0013-3326III1000800.2828440.0000072.10.23-11.30.080.6417.309.9935.83
M84/5_612 2011-06-0844.0213-5.8370-1252III114880-11.40.0817.509.3235.78
M84/5_6122011-06-0844.0213-5.8370-1252III1248800.2828610.0000072.70.24-11.70.100.7917.508.3535.64
M84/5_576 2011-06-0544.1322-6.0015-3295III140020-12.10.1217.907.0235.45
M84/5_5762011-06-0544.1322-6.0015-3295III180080-12.70.090.8717.404.2435.04
M84/5_611 2011-06-0843.9983-5.9018-1996III1893800.2828410.0000062.00.22-12.90.1317.204.2135.07
M84/5_6112011-06-0843.9983-5.9018-1996III199380-12.10.100.8117.603.7935.02
M84/5_5762011-06-0544.1322-6.0015-3295III250020-11.80.2718.202.9934.97
M84/5_5762011-06-0544.1322-6.0015-3295III3250800.2827980.0000050.40.18-11.50.110.8821.302.4034.93
M84/5_SW04 2011-06-1043.7070-2.7627-3IV3140-10.50.1014.26
M84/5_SW06 2011-06-1743.9735-3.0121-3IV3140-10.30.1114.06
M84/5_635 2011-06-1243.5283-2.7565-230IV124800.2827730.000006-0.40.20-11.00.100.4516.2012.1035.71
M84/5_625 2011-06-1043.7333-2.6165-2365IV200200.2828020.0000180.60.64-11.40.120.4616.2011.8635.68
M84/5_6352011-06-1243.5283-2.7565-230IV223800.2827850.0000080.00.30-11.10.120.4116.3011.7935.67
M84/5_6252011-06-1043.7333-2.6165-2365IV450800.2828640.0000072.80.23-11.40.130.5316.8011.2635.62
M84/5_6252011-06-1043.7333-2.6165-2365IV700200.2827950.0000160.30.57-11.60.150.7616.9010.5035.68
M84/5_6252011-06-1043.7333-2.6165-2365IV900800.2828100.0000060.90.21-10.80.090.7516.9010.0035.79
M84/5_624 2011-06-1043.7332-2.6165-2384IV1200200.2827970.0000130.40.46-11.70.110.8023.608.5635.68
M84/5_6242011-06-1043.7332-2.6165-2384IV1500800.2828090.0000060.80.20-11.50.0622.906.4135.38
M84/5_6242011-06-1043.7332-2.6165-2384IV1800200.2828120.0000101.00.36-11.20.120.8818.904.6635.15
M84/5_6242011-06-1043.7332-2.6165-2384IV2300801.0522.103.3535.01
M84/5_SW05 2011-06-1346.1938-4.4042-3V3140-10.90.1510.24
M84/5_639 2011-06-1346.1665-4.4668-2060V200800.2827790.000008-0.20.29-10.70.050.4415.7011.7335.67
M84/5_6392011-06-1346.1665-4.4668-2060V550800.2827790.000006-0.20.22-11.00.220.5816.2011.0035.62
M84/5_6392011-06-1346.1665-4.4668-2060V75020-11.70.1116.9010.3635.73
M84/5_666 2011-06-1646.2325-4.3247-808V79880-11.80.080.6716.8010.2735.74
M84/5_638 2011-06-1346.1668-4.4667-2057V90070-11.20.120.7417.309.9735.80
M84/5_6382011-06-1346.1668-4.4667-2057V130020-11.90.090.8017.407.7235.56
M84/5_6382011-06-1346.1668-4.4667-2057V165020-12.40.100.7917.205.1035.20
M84/5_6382011-06-1346.1668-4.4667-2057V2013800.2828480.0000062.20.20-12.10.100.8318.403.6935.04