Publications des scientifiques de l'IRD

Verwega M. T., Somes C. J., Schartau M., Tuerena R. E., Lorrain Anne, Oschlies A., Slawig T. (2021). Description of a global marine particulate organic carbon-13 isotope data set [Data paper]. Earth System Science Data, 13 (10), p. 4861-4880. ISSN 1866-3508.

Titre du document
Description of a global marine particulate organic carbon-13 isotope data set [Data paper]
Année de publication
2021
Type de document
Article référencé dans le Web of Science WOS:000711526200001
Auteurs
Verwega M. T., Somes C. J., Schartau M., Tuerena R. E., Lorrain Anne, Oschlies A., Slawig T.
Source
Earth System Science Data, 2021, 13 (10), p. 4861-4880 ISSN 1866-3508
Marine particulate organic carbon stable isotope ratios (delta C-13(POC)) provide insights into understanding carbon cycling through the atmosphere, ocean and biosphere. They have for example been used to trace the input of anthropogenic carbon in the marine ecosystem due to the distinct isotopically light signature of anthropogenic emissions. However, delta C-13(POC) is also significantly altered during photosynthesis by phytoplankton, which complicates its interpretation. For such purposes, robust spatio-temporal coverage of delta C-13(POC) observations is essential. We collected all such available data sets and merged and homogenized them to provide the largest available marine delta C-13(POC) data set (https://doi.org/10.1594/PANGAEA.929931; Verwega et al., 2021). The data set consists of 4732 data points covering all major ocean basins beginning in the 1960s. We describe the compiled raw data, compare different observational methods, and provide key insights in the temporal and spatial distribution that is consistent with previously observed large-scale patterns. The main different sample collection methods (bottle, intake, net, trap) are generally consistent with each other when comparing within regions. An analysis of 1990s median delta C-13(POC) values in a meridional section across the best-covered Atlantic Ocean shows relatively high values (>= -22 parts per thousand) in the low latitudes (<30 degrees) trending towards lower values in the Arctic Ocean (similar to -24 parts per thousand) and Southern Ocean (<= -28 parts per thousand). The temporal trend since the 1960s shows a decrease in the median delta C-13(POC) by more than 3 parts per thousand in all basins except for the Southern Ocean, which shows a weaker trend but contains relatively poor multi-decadal coverage.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Sciences du milieu [021] ; Limnologie physique / Océanographie physique [032]
Description Géographique
MONDE
Localisation
Fonds IRD [F B010083290]
Identifiant IRD
fdi:010083290
Contact