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):
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)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | Böttcher, Michael Ernst | |||
2 | DATE/TIME | Date/Time | Böttcher, Michael Ernst | Geocode | ||
3 | LATITUDE | Latitude | Böttcher, Michael Ernst | Geocode | ||
4 | LONGITUDE | Longitude | Böttcher, Michael Ernst | Geocode | ||
5 | DEPTH, water | Depth water | m | Böttcher, Michael Ernst | Geocode | |
6 | Alkalinity, total | AT | µmol/kg | Böttcher, Michael Ernst | Potentiometric titration | |
7 | Salinity | Sal | Böttcher, Michael Ernst | Tetra Con 325 salinity and temperature probe | ||
8 | δ13C, dissolved inorganic carbon | δ13C DIC | ‰ PDB | Böttcher, Michael Ernst | Isotope ratio monitoring (IRM) mass spectrometry |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
148 data points
Data
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 | 2009-09-22T10:15:00 | 54.23 | 8.59 | 7.4 | 2274 | 29.0 | -1.30 |
Transect_Eider | 2009-09-22T10:25:00 | 54.23 | 8.61 | 7.5 | 2311 | 28.0 | -1.53 |
Transect_Eider | 2009-09-22T10:37:00 | 54.20 | 8.64 | 2.4 | 2341 | 27.1 | -2.48 |
Transect_Eider | 2009-09-22T10:45:00 | 54.25 | 8.66 | 8.9 | 2354 | 26.8 | -2.73 |
Transect_Eider | 2009-09-22T10:54:00 | 54.26 | 8.67 | 4.1 | 2304 | 26.7 | -2.57 |
Transect_Eider | 2009-09-22T11:02:00 | 54.26 | 8.70 | 5.8 | 2362 | 26.6 | -3.04 |
Transect_Eider | 2009-09-22T11:12:00 | 54.25 | 8.73 | 6.9 | 2393 | 26.5 | -2.82 |
Transect_Eider | 2009-09-22T11:21:00 | 54.26 | 8.76 | 4.9 | 2355 | 25.9 | -3.12 |
Transect_Eider | 2009-09-22T11:31:00 | 54.27 | 8.79 | 5.0 | 2457 | 25.1 | -3.47 |
Transect_Eider | 2009-09-22T11:41:00 | 54.27 | 8.82 | 4.0 | 2425 | 23.8 | -4.06 |
Transect_Eider | 2009-09-22T12:00:00 | 54.26 | 8.85 | 6.0 | 2528 | 21.3 | -5.13 |
Transect_Eider | 2009-09-22T12:07:00 | 54.26 | 8.88 | 10.0 | 2546 | 19.2 | -5.88 |
Transect_Eider | 2009-09-22T12:17:00 | 54.27 | 8.90 | 3.0 | 2770 | 16.0 | -7.05 |
Transect_Eider | 2009-09-22T12:21:00 | 54.28 | 8.93 | 3.4 | 2694 | 11.9 | -8.35 |
Transect_Eider | 2009-09-22T12:31:00 | 54.29 | 8.93 | 4.2 | 2774 | -9.45 | |
Transect_Eider | 2009-09-22T12:41:00 | 54.31 | 8.94 | 3.5 | 2751 | 4.8 | -10.54 |
Transect_Eider | 2009-09-22T12:47:00 | 54.31 | 8.95 | 3.8 | 2774 | 4.5 | -11.13 |
Transect_Hoernumtief | 2009-09-23T10:40:00 | 54.71 | 8.28 | 20.0 | 2274 | 30.7 | -0.29 |
Transect_Hoernumtief | 2009-09-23T10:50:00 | 54.72 | 8.29 | 13.0 | 2300 | 30.7 | -0.36 |
Transect_Hoernumtief | 2009-09-23T11:00:00 | 54.73 | 8.30 | 12.0 | 2266 | 30.6 | -0.39 |
Transect_Hoernumtief | 2009-09-23T11:08:00 | 54.73 | 8.31 | 15.0 | 2326 | 30.6 | -0.27 |
Transect_Hoernumtief | 2009-09-23T11:22:00 | 54.74 | 8.32 | 16.0 | 2247 | 30.6 | -0.64 |
Transect_Hoernumtief | 2009-09-23T11:27:00 | 54.75 | 8.34 | 12.0 | 2221 | 30.6 | -0.38 |
Transect_Hoernumtief | 2009-09-23T11:36:00 | 54.76 | 8.36 | 8.5 | 2233 | 30.6 | -0.36 |
Transect_Hoernumtief | 2009-09-23T11:46:00 | 54.77 | 8.38 | 9.0 | 2245 | 30.7 | -0.54 |
Transect_Hoernumtief | 2009-09-23T11:55:00 | 54.78 | 8.41 | 11.0 | 2261 | 30.6 | -1.13 |
Transect_Hoernumtief | 2009-09-23T12:06:00 | 54.78 | 8.43 | 13.0 | 2232 | 30.6 | -0.37 |
Transect_Hoernumtief | 2009-09-23T12:15:00 | 54.80 | 8.45 | 8.0 | 2257 | -0.61 | |
Transect_Hoernumtief | 2009-09-23T12:25:00 | 54.81 | 8.46 | 11.0 | 2255 | 30.6 | -0.76 |
Transect_Hoernumtief | 2009-09-23T12:35:00 | 54.82 | 8.48 | 4.5 | 2278 | 30.7 | -0.64 |
Transect_Hoernumtief | 2009-09-23T12:45:00 | 54.83 | 8.51 | 10.0 | 2252 | 30.7 | -0.63 |
Transect_Hoernumtief | 2009-09-23T12:55:00 | 54.84 | 8.53 | 10.0 | 2309 | 30.9 | -10.90 |
Transect_Hoernumtief | 2009-09-23T13:04:00 | 54.85 | 8.55 | 4.6 | 2293 | 31.0 | -1.32 |
Transect_Hoernumtief | 2009-09-23T13:15:00 | 54.86 | 8.56 | 3.5 | 2319 | 31.0 | -1.30 |
Transect_Norderaue | 2009-09-24T11:00:00 | 54.57 | 8.40 | 12.0 | 2272 | 30.4 | -0.54 |
Transect_Norderaue | 2009-09-24T11:12:00 | 54.58 | 8.40 | 6.5 | 2256 | 30.5 | -0.41 |
Transect_Norderaue | 2009-09-24T11:20:00 | 54.60 | 8.41 | 5.6 | 2274 | 30.6 | -0.29 |
Transect_Norderaue | 2009-09-24T11:30:00 | 54.61 | 8.43 | 9.2 | 2260 | 30.6 | -0.36 |
Transect_Norderaue | 2009-09-24T11:40:00 | 54.63 | 8.44 | 15.0 | 2262 | 30.6 | -0.33 |
Transect_Norderaue | 2009-09-24T11:50:00 | 54.64 | 8.46 | 17.0 | 2208 | 30.6 | -0.33 |
Transect_Norderaue | 2009-09-24T12:00:00 | 54.65 | 8.49 | 8.3 | 2259 | 30.6 | -0.37 |
Transect_Norderaue | 2009-09-24T12:10:00 | 54.66 | 8.51 | 13.0 | 2256 | 30.5 | -0.45 |
Transect_Norderaue | 2009-09-24T12:18:00 | 54.66 | 8.54 | 8.0 | 2267 | 30.5 | -0.52 |
Transect_Norderaue | 2009-09-24T12:25:00 | 54.66 | 8.57 | 14.0 | 2263 | 30.5 | -0.47 |
Transect_Norderaue | 2009-09-24T12:35:00 | 54.67 | 8.60 | 9.0 | 2255 | 30.6 | -0.47 |
Transect_Norderaue | 2009-09-24T12:44:00 | 54.69 | 8.62 | 9.5 | 2239 | 30.6 | -0.48 |
Transect_Norderaue | 2009-09-24T12:51:00 | 54.70 | 8.63 | 12.0 | 2247 | 30.7 | -0.79 |
Transect_Norderaue | 2009-09-24T13:00:00 | 54.71 | 8.65 | 5.8 | 2258 | 30.7 | -0.53 |
Transect_Norderaue | 2009-09-24T13:05:00 | 54.72 | 8.67 | 10.0 | 2330 | 30.8 | -1.27 |
Transect_Norderaue | 2009-09-24T13:12:00 | 54.72 | 8.68 | 3.2 | 2306 | 31.0 | -1.02 |