Publication Date:
2023-11-27
Description:
For quantification of the exchange of water between the subtropical and subpolar regime in the eastern North Atlantic, data from inverted echo sounders (PIES) that were deployed in 2016-2017 at the 47/48°N transect is used to calculate meridional baroclinic and barotropic transport time series. The baroclinic PIES transport time series is extended to the period 1993-2017 using altimeter data. Furthermore, the correlation between altimeter and PIES derived sea surface height fluctuations is studied using data from PIES deployed at the 47/48°N transect and parallel to the Mid-Atlantic Ridge. In our analysis, we use the presented data as well as data published in Roessler et al. (2015) and Rhein et al. (2019). We find a mean PIES derived meridional northward transport of 12.2 Sv in 2016-2017 and a mean altimeter derived meridional northward transport of 9.1 Sv in 1993-2017. Additionally, we find a significant positive decadal trend in the northward transport of 2.0 Sv ± 1.5 Sv (eastern boundary current not included). This trend is opposite to the negative decadal trend of -7.1 Sv ± 3.9 Sv (western boundary current included) in the northward transport found by Rhein et al. (2019).
Keywords:
47°N; altimetry; Der Nordatlantik als Teil des Erdsystems; east Atlantic basin; meridional transport time series; Nordatlantik; PIES; RACE; Regional Atlantic Circulation and global Change
Type:
Dataset
Format:
application/zip, 10 datasets
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