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Böttcher, Michael Ernst; Winde, Vera (2016): Carbon sources in the North Sea evaluated by means of carbon isotope tracers [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.858134, Supplement to: Burt, William J; Thomas, H; Hagens, Mathilde; Pätsch, J; Clargo, N M; Salt, L A; Winde, Vera; Böttcher, Michael Ernst (2016): Carbon sources in the North Sea evaluated by means of radium and stable carbon isotope tracers. Limnology and Oceanography, 61(2), 666-683, https://doi.org/10.1002/lno.10243

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Abstract:
A multitracer approach is applied to assess the impact of boundary fluxes (e.g., benthic input from sedi- ments or lateral inputs from the coastline) on the acid-base buffering capacity, and overall biogeochemistry, of the North Sea. Analyses of both basin-wide observations in the North Sea and transects through tidal basins at the North-Frisian coastline, reveal that surface distributions of the d13C signature of dissolved inorganic carbon (DIC) are predominantly controlled by a balance between biological production and respiration. In particular, variability in metabolic DIC throughout stations in the well-mixed southern North Sea indi- cates the presence of an external carbon source, which is traced to the European continental coastline using naturally occurring radium isotopes (224Ra and 228Ra). 228Ra is also shown to be a highly effective tracer of North Sea total alkalinity (AT) compared to the more conventional use of salinity. Coastal inputs of meta- bolic DIC and AT are calculated on a basin-wide scale, and ratios of these inputs suggest denitrification as a primary metabolic pathway for their formation. The AT input paralleling the metabolic DIC release prevents a significant decline in pH as compared to aerobic (i.e., unbuffered) release of metabolic DIC. Finally, long- term pH trends mimic those of riverine nitrate loading, highlighting the importance of coastal AT production via denitrification in regulating pH in the southern North Sea.
Project(s):
Biological Impacts of Ocean Acidification (BIOACID)
Coverage:
Median Latitude: 54.564200 * Median Longitude: 8.576200 * South-bound Latitude: 54.200000 * West-bound Longitude: 8.280000 * North-bound Latitude: 54.860000 * East-bound Longitude: 8.950000
Date/Time Start: 2009-09-22T10:15:00 * Date/Time End: 2009-09-24T13:12:00
Minimum DEPTH, water: 2.4 m * Maximum DEPTH, water: 20.0 m
Event(s):
Transect_Eider (Inner and Outer Eider)  * Latitude Start: 54.230000 * Longitude Start: 8.590000 * Latitude End: 54.310000 * Longitude End: 8.950000 * Date/Time Start: 2009-09-22T10:15:00 * Date/Time End: 2009-09-22T12:47:00 * Method/Device: Water sample (WS)
Transect_Hoernumtief  * Latitude Start: 54.710000 * Longitude Start: 8.280000 * Latitude End: 54.860000 * Longitude End: 8.560000 * Date/Time Start: 2009-09-23T10:40:00 * Date/Time End: 2009-09-23T13:15:00 * Method/Device: Water sample (WS)
Transect_Norderaue  * Latitude Start: 54.570000 * Longitude Start: 8.400000 * Latitude End: 54.720000 * Longitude End: 8.680000 * Date/Time Start: 2009-09-24T11:00:00 * Date/Time End: 2009-09-24T13:12:00 * Method/Device: Water sample (WS)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventBöttcher, Michael Ernst
2 DATE/TIMEDate/TimeBöttcher, Michael ErnstGeocode
3 LATITUDELatitudeBöttcher, Michael ErnstGeocode
4 LONGITUDELongitudeBöttcher, Michael ErnstGeocode
5 DEPTH, waterDepth watermBöttcher, Michael ErnstGeocode
6 Alkalinity, totalATµmol/kgBöttcher, Michael ErnstPotentiometric titration
7 SalinitySalBöttcher, Michael ErnstTetra Con 325 salinity and temperature probe
8 δ13C, dissolved inorganic carbonδ13C DIC‰ PDBBöttcher, Michael ErnstIsotope ratio monitoring (IRM) mass spectrometry
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
148 data points

Data

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

1 
Event		2 
Date/Time		3 
Latitude		4 
Longitude		5 
Depth water [m]		6 
AT [µmol/kg]		7 
Sal		8 
δ13C DIC [‰ PDB]
Transect_Eider 2009-09-22T10:15:0054.238.597.4227429.0-1.30
Transect_Eider2009-09-22T10:25:0054.238.617.5231128.0-1.53
Transect_Eider2009-09-22T10:37:0054.208.642.4234127.1-2.48
Transect_Eider2009-09-22T10:45:0054.258.668.9235426.8-2.73
Transect_Eider2009-09-22T10:54:0054.268.674.1230426.7-2.57
Transect_Eider2009-09-22T11:02:0054.268.705.8236226.6-3.04
Transect_Eider2009-09-22T11:12:0054.258.736.9239326.5-2.82
Transect_Eider2009-09-22T11:21:0054.268.764.9235525.9-3.12
Transect_Eider2009-09-22T11:31:0054.278.795.0245725.1-3.47
Transect_Eider2009-09-22T11:41:0054.278.824.0242523.8-4.06
Transect_Eider2009-09-22T12:00:0054.268.856.0252821.3-5.13
Transect_Eider2009-09-22T12:07:0054.268.8810.0254619.2-5.88
Transect_Eider2009-09-22T12:17:0054.278.903.0277016.0-7.05
Transect_Eider2009-09-22T12:21:0054.288.933.4269411.9-8.35
Transect_Eider2009-09-22T12:31:0054.298.934.22774-9.45
Transect_Eider2009-09-22T12:41:0054.318.943.527514.8-10.54
Transect_Eider2009-09-22T12:47:0054.318.953.827744.5-11.13
Transect_Hoernumtief 2009-09-23T10:40:0054.718.2820.0227430.7-0.29
Transect_Hoernumtief2009-09-23T10:50:0054.728.2913.0230030.7-0.36
Transect_Hoernumtief2009-09-23T11:00:0054.738.3012.0226630.6-0.39
Transect_Hoernumtief2009-09-23T11:08:0054.738.3115.0232630.6-0.27
Transect_Hoernumtief2009-09-23T11:22:0054.748.3216.0224730.6-0.64
Transect_Hoernumtief2009-09-23T11:27:0054.758.3412.0222130.6-0.38
Transect_Hoernumtief2009-09-23T11:36:0054.768.368.5223330.6-0.36
Transect_Hoernumtief2009-09-23T11:46:0054.778.389.0224530.7-0.54
Transect_Hoernumtief2009-09-23T11:55:0054.788.4111.0226130.6-1.13
Transect_Hoernumtief2009-09-23T12:06:0054.788.4313.0223230.6-0.37
Transect_Hoernumtief2009-09-23T12:15:0054.808.458.02257-0.61
Transect_Hoernumtief2009-09-23T12:25:0054.818.4611.0225530.6-0.76
Transect_Hoernumtief2009-09-23T12:35:0054.828.484.5227830.7-0.64
Transect_Hoernumtief2009-09-23T12:45:0054.838.5110.0225230.7-0.63
Transect_Hoernumtief2009-09-23T12:55:0054.848.5310.0230930.9-10.90
Transect_Hoernumtief2009-09-23T13:04:0054.858.554.6229331.0-1.32
Transect_Hoernumtief2009-09-23T13:15:0054.868.563.5231931.0-1.30
Transect_Norderaue 2009-09-24T11:00:0054.578.4012.0227230.4-0.54
Transect_Norderaue2009-09-24T11:12:0054.588.406.5225630.5-0.41
Transect_Norderaue2009-09-24T11:20:0054.608.415.6227430.6-0.29
Transect_Norderaue2009-09-24T11:30:0054.618.439.2226030.6-0.36
Transect_Norderaue2009-09-24T11:40:0054.638.4415.0226230.6-0.33
Transect_Norderaue2009-09-24T11:50:0054.648.4617.0220830.6-0.33
Transect_Norderaue2009-09-24T12:00:0054.658.498.3225930.6-0.37
Transect_Norderaue2009-09-24T12:10:0054.668.5113.0225630.5-0.45
Transect_Norderaue2009-09-24T12:18:0054.668.548.0226730.5-0.52
Transect_Norderaue2009-09-24T12:25:0054.668.5714.0226330.5-0.47
Transect_Norderaue2009-09-24T12:35:0054.678.609.0225530.6-0.47
Transect_Norderaue2009-09-24T12:44:0054.698.629.5223930.6-0.48
Transect_Norderaue2009-09-24T12:51:0054.708.6312.0224730.7-0.79
Transect_Norderaue2009-09-24T13:00:0054.718.655.8225830.7-0.53
Transect_Norderaue2009-09-24T13:05:0054.728.6710.0233030.8-1.27
Transect_Norderaue2009-09-24T13:12:0054.728.683.2230631.0-1.02