NDP-096 (2016)
ORNL/CDIAC-162
An Internally Consistent Dataset of δ13C-DIC Data in the North Atlantic Ocean
by M. Becker1,2, N. Andersen3, H. Erlenkeuser3, T. Tanhua1, M.P. Humphreys4, A. Körtzinger1,2,
Prepared by Alex Kozyr5
1GEOMAR, Helmholtz Center for Ocean Research, Kiel, Germany
2Christian Albrecht University Kiel, Kiel, Germany
3Leibniz-Laboratory for Radiometric Dating and Isotope Research, Christian Albrecht University, Kiel, Germany
4Ocean and Earth Science, University of Southampton, Southampton, UK
5Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
NAC13v1 Data Files
Becker, et al. 2016
Abstract
Here, we present a δ13C-DIC dataset for the North Atlantic, which has undergone strict quality control. The data, all in all 6569 samples, originate from oceanographic research cruises that took place between 1981 and 2014. During a primary quality control step based on simple r ange tests obviously bad data has been flagged. In a second quality control step systematic biases between of all cruises were quantified through a crossover analysis. The dataset consists of 32 cruises of which 24 could be compared quantitatively for systematic biases through an adequate crossover study. Additive adjustments were applied to 11 of the 24 cruises. Based on this analysis the internal consistency of this dataset is estimated to be 0.017‰.
The NAC13v1.csv file contains the 13C data, a simple quality flag ('δ13Cf', 2: good, 9: bad/not measured) and a 2nd QC-flag ('δ13Cqc', 1: quality controlled, 0: not quality controlled). The NAC13v1_expocode.csv-File contains the allocation of the cruise numbers used in NAC13v1 and their expocodes as well as the respective cruise numbers in GLODAPv2 and CARINA. For this analysis some cruises that belong together were condensed to one, e.g. the TTO-NA cruises (See Table 1).
For more information please have a look at:
Becker, M., Andersen, N., Erlenkeuser, H., Humphreys, M.P., Tanhua, T., and Körtzinger, A.: NAC13v1 - An Internally Consistent Dataset of δ13C-DIC Data in the North Atlantic Ocean, ESSD
Please cite this dataset as:
Becker, M., Andersen, N., Erlenkeuser, H., Humphreys, M.P., Tanhua, T., and Körtzinger, A.: NAC13v1 - An Internally Consistent Dataset of δ13C-DIC Data in the North Atlantic Ocean, ESSD
Table 1. Cruise numbers used in the NAC13v1 dataset with the EXPOCODEs and respective cruise numbers in GLODAPv2 and CARINA.
| EXPOCODE | CRUISENO | CRUISENO_GLODAPv2 | CRUISENO_CARINA |
| 06MT19941012 | 1 | 37 | 12 |
| 06MT19970515 | 2.1 | 42 | 17 |
| 06MT19970707 | 2.2 | 44 | 18 |
| 06MT19970815 | 2.3 | 45 | 19 |
| 06MT19990711 | 3.1 | 46 | 20 |
| 06MT19990813 | 3.2 | 47 | 21 |
| 06MT20010507 | 4 | 49 | 23 |
| 06MT20030723 | 5 | 56 | 30 |
| 06MT20040311 | 6 | 58 | 32 |
| 316N19970717 | 7 | 260 | -999 |
| 316N19970815 | 8 | 261 | -999 |
| 316N20030922 | 9 | 264 | 68 |
| 316N20031023 | 10 | 265 | 69 |
| 33RO19980123 | 11 | 341 | 85 |
| 33MW19910711 | 12 | 336 | -999 |
| 33MW19930704.1 | 13 | 338 | -999 |
| 35TH20020611 | 14 | 392 | 108 |
| 35TH20060521 | 15 | -999 | -999 |
| 58JH19920712 | 16 | 637 | 130 |
| 58JH19940723 | 17 | 642 | 135 |
| 64TR19900417 | 18 | 669 | 154 |
| 74DI20120731 | 19 | -999 | -999 |
| OMEX1NA | 20 | -999 | 187 |
| TTO | 21 | 237 | -999 |
Becker, M., N. Andersen, H. Erlenkeuser, T. Tanhua, M.P. Humphreys and A. Körtzinger. 2016. An Internally Consistent Dataset of δ13C-DIC Data in the North Atlantic Ocean. (NCEI Accession 0164569). NOAA National Centers for Environmental Information. doi: 10.3334/CDIAC/OTG.NAC13v1
