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Rhein, Monika; Mertens, Christian; Roessler, Achim (2019): Lowered ADCP, current meter data and PIES time series measurements in the western subpolar North Atlantic (47°N) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.903211, Supplement to: Rhein, M et al. (2019): Observed transport decline at 47°N, western Atlantic. Journal of Geophysical Research: Oceans, 124(7), 4875-4890, https://doi.org/10.1029/2019JC014993

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Abstract:
Despite the importance of the large scale Atlantic circulation for the climate system and sea level, most of the interior flow field is only known qualitatively, and neither the mean nor the variability and trends are quantified. We investigate the meridional flow field in the western Atlantic at 47°N between 44°W and 31°W, combining moored inverted echo sounders (PIES) and current meter moorings with lowered ADCP and Argo data. Correlations with altimetry are used to extend each of the transport time series back to 1993. At the Canadian continental margin the boundary current (BC) exports -23.1±1.5 Sv to the south. Nearby, the northward flowing North Atlantic Current (NAC) imports 105.9±3.4 Sv into the subpolar gyre. Constrained mainly by topography, about half of that flow recirculates in close proximity to the NAC (-58.8±3.9 Sv). NAC and recirculation are significantly anticorrelated. The flow east of 37°W (-27.8±2.1 Sv) has no permanent regional features and is not correlated to the NAC. The sum of the interior components (19.3±3.3 Sv) shows a significant trend in the time period 1993 - 2018 of -0.60 Sv/yr. This decline is dominated by the significant increase of the southward flow east of 37°W (-0.44 Sv/yr). The trends of the other individual components are not significant, but the sum of the interior and BC transport is (-0.71 Sv/yr). The trends are most likely caused by regionally different warming.
Keyword(s):
altimetry; current meter; LADCP; lowered ADCP; meridional transport time series; PIES; 47°N; west atlantic basin; western boundary currents
Project(s):
Regional Atlantic Circulation and global Change (RACE)
Coverage:
Median Latitude: 47.250636 * Median Longitude: -37.915709 * South-bound Latitude: 46.516600 * West-bound Longitude: -47.380500 * North-bound Latitude: 48.110800 * East-bound Longitude: -23.415900
Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2018-04-17T12:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
12 datasets

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Datasets listed in this publication series

  1. Mertens, C; Roessler, A; Rhein, M (2019): Lowered ADCP data in the western subpolar North Atlantic (47°N). https://doi.org/10.1594/PANGAEA.903209
  2. Mertens, C; Roessler, A; Rhein, M (2019): Current meter data of mooring B22. https://doi.org/10.1594/PANGAEA.903201
  3. Mertens, C; Roessler, A; Rhein, M (2019): Current meter data of mooring B24. https://doi.org/10.1594/PANGAEA.903205
  4. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP12-4. https://doi.org/10.1594/PANGAEA.904122
  5. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP12-5. https://doi.org/10.1594/PANGAEA.904123
  6. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP27-1. https://doi.org/10.1594/PANGAEA.904124
  7. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP28-1. https://doi.org/10.1594/PANGAEA.904125
  8. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP29-1. https://doi.org/10.1594/PANGAEA.904126
  9. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP30-1. https://doi.org/10.1594/PANGAEA.904127
  10. Roessler, A (2019): Pressure and two-way traveltime time series in the North Atlantic at station PIES_BP31-1. https://doi.org/10.1594/PANGAEA.905050
  11. Roessler, A (2019): Absolute transport time series in the west Atlantic basin at 47°N based on PIES measurements. https://doi.org/10.1594/PANGAEA.904130
  12. Roessler, A (2019): Absolute transport time series in the west Atlantic basin at 47°N based on PIES measurements and satellite altimetry. https://doi.org/10.1594/PANGAEA.904055