Overflow time-series through Denmark Strait

Northward overflow transport through Denmark Strait denser than sigma=27.8 in Sv. filtered with a 30-day running mean. Original data is hourly. Copyright: UHH/CEN/A. Köhl

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Access

UNRESTRICTED:

Access data via THREDDS / OPeNDAP

RESTRICTED: This link to the data set is only available for a restricted user group. The data set is only accessible in CEN/MPI net or accessible from external nets with a customer account. Please contact ICDC if you would like to access this data from outside the network.

Data access via file system: /data/icdc/ocean/dso_transport

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Description

The dense overflows across the Greenland-Iceland-Scotland ridge constitute the most important contribution to the lower limb of the Atlantic Meridional Overturning Circulation. Among those, the Denmark Strait carries with about half of the total the largest fraction of the transport. Since 1996, the outflow of DSOW has nearly constantly be monitored with moored instruments. The University Hamburg maintains an ADCP mooring at the Denmark Strait sill up to date.

Fig. 1: Denmark Strait Overflow. The array is based on two upward-looking ADCPs with hydrographic sensors (blue dots) and a standard CTD section (red line). DS1 is located in the east and DS2 is located in the west. Copyright: UHH/CEN/A. Köhl

Volume transports of the overflow through Denmark Strait are captured by the two moored acoustic current profilers and hydrographic sensors at the DS1 and DS2 locations. DS1 is maintained by Hafrannsóknastofnun Marine and Freshwater Research Institute (MFRI), Iceland, and DS2 is maintained by Universität of Hamburg. Processing of the data is described by Jochumsen et. al (2017).

Fig. 2: Example for a DS2 mooring configuration. This configuration was deployed on 15.08.2018 on the MSM76 cruise. Copyright: UHH/CEN/A. Köhl

Last update of data set at ICDC: 9.12.2021

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Parameters

Parameters of the overflow data set
Name	Unit
DSO_TR	Sv

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Coverage, spatial and temporal resolution

Period and temporal resolution:

1996 to 2021
hourly

Coverage and spatial resolution:

Integrated quantity

Format:

NetCDF

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Data quality

Processed data from 2 upward looking ADCP.
Various gaps due to missing instruments

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Contact

Armin Köhl
CEN / University of Hamburg
E-Mail: armin.koehl (at) uni-hamburg.de

Remon Sadikni
ICDC / CEN / University of Hamburg
E-Mail: remon.sadikni@uni-hamburg.de<br />(remon.sadikni"AT"uni-hamburg.de)

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References

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Data citation, License, and Acknowledgments

Please cite the data as follows:

Jochumsen, K., M. Moritz, N. Nunes, D. Quadfasel, K. M. Larsen, B. Hansen, H. Valdimarsson and S. Jonsson (2017): Revised transport estimates of the Denmark Strait Overflow, Journal of Geophysical Research J. Geophys. Res., 122, 3434–3450, doi:10.1002/2017JC012803.

and with the following acknowledgments:

The timeseries was generated by Institution of Oceanography Hamburg and Hafrannsóknastofnun / Marine and Freshwater Research Institute (Reykjavik, Iceland). They were supported through funding from the NACLIM, EU-FP7, grant agr. n.308299, until 2016, and from RACE II (Förderkennzeichen 03F0729B, until 2018), RACE-Synthese (Förderkennzeichen 03F0825B, until 2020) German Federal Ministry for Education and Research (BMBF). Nordic WOCE, VEINS, MOEN (contract no. EVK2-CT-2002-00141), ASOF-W (contract no. EVK2-CT-2002-00149), NAClim (grant agr. nr. 308299) THOR (grant agr. nr. 212643), AtlantOS, Blue Action. Collaborative Research Centre TRR 181 "Energy Transfers in Atmosphere and Ocean" funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project number 274762653.

Thanks to ICDC, CEN, University of Hamburg for data support.

License

The data was published under the Creative Commons Attribution 4.0 International License (CC-BY-4.0).

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