A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents
The pathways and fate of freshwater in the East Greenland Coastal Current (EGCC) are crucial to the climate system. The EGCC transports large amounts of freshwater in close proximity to sites of deep open-ocean convection in the Labrador and Irminger seas. Many studies have attempted to analyze this...
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ftcopernicus:oai:publications.copernicus.org:egusphere108460 2023-10-25T01:38:09+02:00 A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents Coquereau, Arthur Foukal, Nicholas P. 2023-09-21 application/pdf https://doi.org/10.5194/egusphere-2022-1450 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-1450/ eng eng doi:10.5194/egusphere-2022-1450 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-1450/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2022-1450 2023-09-25T16:24:15Z The pathways and fate of freshwater in the East Greenland Coastal Current (EGCC) are crucial to the climate system. The EGCC transports large amounts of freshwater in close proximity to sites of deep open-ocean convection in the Labrador and Irminger seas. Many studies have attempted to analyze this system from models and various observational platforms, but the modeling results largely disagree with one another, and observations are limited due to the harsh conditions typical of the region. Altimetry-derived surface currents, constructed from remote-sensing observations and applying geostrophic equations, provide a continuous observational data set beginning in 1993. However, these products have historically encountered difficulties in coastal regions, and thus their validity must be checked. In this work, we use a comprehensive methodology to compare these Eulerian data to a Lagrangian data set of 34 surface drifter trajectories and demonstrate that the altimetry-derived surface currents are surprisingly capable of recovering the spatial structure of the flow field on the south Greenland shelf and can mimic the Lagrangian nature of the flow as observed from surface drifters. Text East Greenland Greenland Copernicus Publications: E-Journals Greenland |
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Copernicus Publications: E-Journals |
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English |
description |
The pathways and fate of freshwater in the East Greenland Coastal Current (EGCC) are crucial to the climate system. The EGCC transports large amounts of freshwater in close proximity to sites of deep open-ocean convection in the Labrador and Irminger seas. Many studies have attempted to analyze this system from models and various observational platforms, but the modeling results largely disagree with one another, and observations are limited due to the harsh conditions typical of the region. Altimetry-derived surface currents, constructed from remote-sensing observations and applying geostrophic equations, provide a continuous observational data set beginning in 1993. However, these products have historically encountered difficulties in coastal regions, and thus their validity must be checked. In this work, we use a comprehensive methodology to compare these Eulerian data to a Lagrangian data set of 34 surface drifter trajectories and demonstrate that the altimetry-derived surface currents are surprisingly capable of recovering the spatial structure of the flow field on the south Greenland shelf and can mimic the Lagrangian nature of the flow as observed from surface drifters. |
format |
Text |
author |
Coquereau, Arthur Foukal, Nicholas P. |
spellingShingle |
Coquereau, Arthur Foukal, Nicholas P. A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
author_facet |
Coquereau, Arthur Foukal, Nicholas P. |
author_sort |
Coquereau, Arthur |
title |
A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
title_short |
A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
title_full |
A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
title_fullStr |
A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
title_full_unstemmed |
A robust framework for comparing Lagrangian and gridded Eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
title_sort |
robust framework for comparing lagrangian and gridded eulerian velocity fields: an example application to surface drifters and altimetry-derived surface currents |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2022-1450 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-1450/ |
geographic |
Greenland |
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Greenland |
genre |
East Greenland Greenland |
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East Greenland Greenland |
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eISSN: |
op_relation |
doi:10.5194/egusphere-2022-1450 https://egusphere.copernicus.org/preprints/2022/egusphere-2022-1450/ |
op_doi |
https://doi.org/10.5194/egusphere-2022-1450 |
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1780733141260959744 |