The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation
The recently discovered East Greenland Spill Jet is a bottom-intensified current on the upper continental slope south of Denmark Strait, transporting intermediate density water equatorward. Until now the Spill Jet has only been observed with limited summertime measurements from ships. Here we presen...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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PERGAMON-ELSEVIER SCIENCE LTD
2014
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Online Access: | https://epic.awi.de/id/eprint/36051/ https://epic.awi.de/id/eprint/36051/1/vonAppen_et_al_DSRI_2014b_accepted.pdf http://www.sciencedirect.com/science/article/pii/S0967063714001022 https://hdl.handle.net/10013/epic.43939 https://hdl.handle.net/10013/epic.43939.d001 |
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ftawi:oai:epic.awi.de:36051 2023-05-15T16:00:36+02:00 The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation von Appen, Wilken-Jon Koszalka, Inga M. Pickart, Robert S. Haine, Thomas W.N. Mastropole, Dana Magaldi, Marcello G. Valdimarsson, Héðinn Girton, James Jochumsen, Kerstin Krahmann, Gerd 2014-10 application/pdf https://epic.awi.de/id/eprint/36051/ https://epic.awi.de/id/eprint/36051/1/vonAppen_et_al_DSRI_2014b_accepted.pdf http://www.sciencedirect.com/science/article/pii/S0967063714001022 https://hdl.handle.net/10013/epic.43939 https://hdl.handle.net/10013/epic.43939.d001 unknown PERGAMON-ELSEVIER SCIENCE LTD https://epic.awi.de/id/eprint/36051/1/vonAppen_et_al_DSRI_2014b_accepted.pdf https://hdl.handle.net/10013/epic.43939.d001 von Appen, W. J. orcid:0000-0002-7200-0099 , Koszalka, I. M. , Pickart, R. S. , Haine, T. W. , Mastropole, D. , Magaldi, M. G. , Valdimarsson, H. , Girton, J. , Jochumsen, K. and Krahmann, G. (2014) The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation , Deep-Sea Research Part I-Oceanographic Research Papers, 92 , pp. 75-84 . doi:10.1016/j.dsr.2014.06.002 <https://doi.org/10.1016/j.dsr.2014.06.002> , hdl:10013/epic.43939 EPIC3Deep-Sea Research Part I-Oceanographic Research Papers, PERGAMON-ELSEVIER SCIENCE LTD, 92, pp. 75-84, ISSN: 0967-0637 Article isiRev 2014 ftawi https://doi.org/10.1016/j.dsr.2014.06.002 2021-12-24T15:39:43Z The recently discovered East Greenland Spill Jet is a bottom-intensified current on the upper continental slope south of Denmark Strait, transporting intermediate density water equatorward. Until now the Spill Jet has only been observed with limited summertime measurements from ships. Here we present the first year-round mooring observations demonstrating that the current is a ubiquitous feature with a volume transport similar to the well-known plume of Denmark Strait overflow water farther downslope. Using reverse particle tracking in a high-resolution numerical model, we investigate the upstream sources feeding the Spill Jet. Three main pathways are identified: particles flowing directly into the Spill Jet from the Denmark Strait sill; particles progressing southward on the East Greenland shelf that subsequently spill over the shelfbreak into the current; and ambient water from the Irminger Sea that gets entrained into the flow. The two Spill Jet pathways emanating from Denmark Strait are newly resolved, and long-term hydrographic data from the strait verifies that dense water is present far onto the Greenland shelf. Additional measurements near the southern tip of Greenland suggest that the Spill Jet ultimately merges with the deep portion of the shelfbreak current, originally thought to be a lateral circulation associated with the sub-polar gyre. Our study thus reveals a previously unrecognized significant component of the Atlantic Meridional Overturning Circulation that needs to be considered to understand fully the ocean's role in climate. Article in Journal/Newspaper Denmark Strait East Greenland Greenland Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Deep Sea Research Part I: Oceanographic Research Papers 92 75 84 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The recently discovered East Greenland Spill Jet is a bottom-intensified current on the upper continental slope south of Denmark Strait, transporting intermediate density water equatorward. Until now the Spill Jet has only been observed with limited summertime measurements from ships. Here we present the first year-round mooring observations demonstrating that the current is a ubiquitous feature with a volume transport similar to the well-known plume of Denmark Strait overflow water farther downslope. Using reverse particle tracking in a high-resolution numerical model, we investigate the upstream sources feeding the Spill Jet. Three main pathways are identified: particles flowing directly into the Spill Jet from the Denmark Strait sill; particles progressing southward on the East Greenland shelf that subsequently spill over the shelfbreak into the current; and ambient water from the Irminger Sea that gets entrained into the flow. The two Spill Jet pathways emanating from Denmark Strait are newly resolved, and long-term hydrographic data from the strait verifies that dense water is present far onto the Greenland shelf. Additional measurements near the southern tip of Greenland suggest that the Spill Jet ultimately merges with the deep portion of the shelfbreak current, originally thought to be a lateral circulation associated with the sub-polar gyre. Our study thus reveals a previously unrecognized significant component of the Atlantic Meridional Overturning Circulation that needs to be considered to understand fully the ocean's role in climate. |
format |
Article in Journal/Newspaper |
author |
von Appen, Wilken-Jon Koszalka, Inga M. Pickart, Robert S. Haine, Thomas W.N. Mastropole, Dana Magaldi, Marcello G. Valdimarsson, Héðinn Girton, James Jochumsen, Kerstin Krahmann, Gerd |
spellingShingle |
von Appen, Wilken-Jon Koszalka, Inga M. Pickart, Robert S. Haine, Thomas W.N. Mastropole, Dana Magaldi, Marcello G. Valdimarsson, Héðinn Girton, James Jochumsen, Kerstin Krahmann, Gerd The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
author_facet |
von Appen, Wilken-Jon Koszalka, Inga M. Pickart, Robert S. Haine, Thomas W.N. Mastropole, Dana Magaldi, Marcello G. Valdimarsson, Héðinn Girton, James Jochumsen, Kerstin Krahmann, Gerd |
author_sort |
von Appen, Wilken-Jon |
title |
The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
title_short |
The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
title_full |
The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
title_fullStr |
The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
title_full_unstemmed |
The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation |
title_sort |
east greenland spill jet as an important component of the atlantic meridional overturning circulation |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/36051/ https://epic.awi.de/id/eprint/36051/1/vonAppen_et_al_DSRI_2014b_accepted.pdf http://www.sciencedirect.com/science/article/pii/S0967063714001022 https://hdl.handle.net/10013/epic.43939 https://hdl.handle.net/10013/epic.43939.d001 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea |
geographic_facet |
Greenland Irminger Sea |
genre |
Denmark Strait East Greenland Greenland |
genre_facet |
Denmark Strait East Greenland Greenland |
op_source |
EPIC3Deep-Sea Research Part I-Oceanographic Research Papers, PERGAMON-ELSEVIER SCIENCE LTD, 92, pp. 75-84, ISSN: 0967-0637 |
op_relation |
https://epic.awi.de/id/eprint/36051/1/vonAppen_et_al_DSRI_2014b_accepted.pdf https://hdl.handle.net/10013/epic.43939.d001 von Appen, W. J. orcid:0000-0002-7200-0099 , Koszalka, I. M. , Pickart, R. S. , Haine, T. W. , Mastropole, D. , Magaldi, M. G. , Valdimarsson, H. , Girton, J. , Jochumsen, K. and Krahmann, G. (2014) The East Greenland Spill Jet as an important component of the Atlantic Meridional Overturning Circulation , Deep-Sea Research Part I-Oceanographic Research Papers, 92 , pp. 75-84 . doi:10.1016/j.dsr.2014.06.002 <https://doi.org/10.1016/j.dsr.2014.06.002> , hdl:10013/epic.43939 |
op_doi |
https://doi.org/10.1016/j.dsr.2014.06.002 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
92 |
container_start_page |
75 |
op_container_end_page |
84 |
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1766396591808184320 |