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
Always quote citation above when using data! You can download the citation in several formats below.
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