Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic

Author Posting. © American Meteorological Society, 2009. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 39 (2009): 3162-3175, doi:10.1175/2009JPO4239.1. Th...

Full description

Bibliographic Details
Published in:Journal of Physical Oceanography
Main Authors: Kamenkovich, Igor V., Berloff, Pavel S., Pedlosky, Joseph
Format: Article in Journal/Newspaper
Language:English
Published: American Meteorological Society 2009
Subjects:
Online Access:https://hdl.handle.net/1912/3991
id ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3991
record_format openpolar
spelling ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3991 2023-05-15T17:29:44+02:00 Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic Kamenkovich, Igor V. Berloff, Pavel S. Pedlosky, Joseph 2009-12 application/pdf https://hdl.handle.net/1912/3991 en_US eng American Meteorological Society https://doi.org/10.1175/2009JPO4239.1 Journal of Physical Oceanography 39 (2009): 3162-3175 https://hdl.handle.net/1912/3991 doi:10.1175/2009JPO4239.1 Journal of Physical Oceanography 39 (2009): 3162-3175 doi:10.1175/2009JPO4239.1 Eddies Transport Currents North Atlantic Ocean Article 2009 ftwhoas https://doi.org/10.1175/2009JPO4239.1 2022-05-28T22:58:09Z Author Posting. © American Meteorological Society, 2009. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 39 (2009): 3162-3175, doi:10.1175/2009JPO4239.1. This study analyzes anisotropic properties of the material transport by eddies and eddy-driven zonal jets in a general circulation model of the North Atlantic through the analysis of Lagrangian particle trajectories. Spreading rates—defined here as half the rate of change in the particle dispersion—in the zonal direction systematically exceed the meridional rates by an order of magnitude. Area-averaged values for the upper-ocean zonal and meridional spreading rates are approximately 8100 and 1400 m2 s−1, respectively, and in the deep ocean they are 2400 and 200 m2 s−1. The results demonstrate that this anisotropy is mainly due to the action of the transient eddies and not to the shear dispersion associated with the time-mean jets. This property is consistent with the fact that eddies in this study have zonally elongated shapes. With the exception of the upper-ocean subpolar gyre, eddies also cause the superdiffusive zonal spreading, significant variations in the spreading rate in the vertical and meridional directions, and the difference between the westward and eastward spreading. Funding for IK was provided by NSF Grants OCE 0346178, 0749722, and 0842834. Funding for PB was provided by NSF Grants OCE 0344094 and OCE 0725796 and by the research grant from the Newton Trust of the University of Cambridge. For JP the acknowledgement is to NSF OCE-0451086. Article in Journal/Newspaper North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Physical Oceanography 39 12 3162 3175
institution Open Polar
collection Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
op_collection_id ftwhoas
language English
topic Eddies
Transport
Currents
North Atlantic Ocean
spellingShingle Eddies
Transport
Currents
North Atlantic Ocean
Kamenkovich, Igor V.
Berloff, Pavel S.
Pedlosky, Joseph
Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
topic_facet Eddies
Transport
Currents
North Atlantic Ocean
description Author Posting. © American Meteorological Society, 2009. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 39 (2009): 3162-3175, doi:10.1175/2009JPO4239.1. This study analyzes anisotropic properties of the material transport by eddies and eddy-driven zonal jets in a general circulation model of the North Atlantic through the analysis of Lagrangian particle trajectories. Spreading rates—defined here as half the rate of change in the particle dispersion—in the zonal direction systematically exceed the meridional rates by an order of magnitude. Area-averaged values for the upper-ocean zonal and meridional spreading rates are approximately 8100 and 1400 m2 s−1, respectively, and in the deep ocean they are 2400 and 200 m2 s−1. The results demonstrate that this anisotropy is mainly due to the action of the transient eddies and not to the shear dispersion associated with the time-mean jets. This property is consistent with the fact that eddies in this study have zonally elongated shapes. With the exception of the upper-ocean subpolar gyre, eddies also cause the superdiffusive zonal spreading, significant variations in the spreading rate in the vertical and meridional directions, and the difference between the westward and eastward spreading. Funding for IK was provided by NSF Grants OCE 0346178, 0749722, and 0842834. Funding for PB was provided by NSF Grants OCE 0344094 and OCE 0725796 and by the research grant from the Newton Trust of the University of Cambridge. For JP the acknowledgement is to NSF OCE-0451086.
format Article in Journal/Newspaper
author Kamenkovich, Igor V.
Berloff, Pavel S.
Pedlosky, Joseph
author_facet Kamenkovich, Igor V.
Berloff, Pavel S.
Pedlosky, Joseph
author_sort Kamenkovich, Igor V.
title Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
title_short Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
title_full Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
title_fullStr Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
title_full_unstemmed Anisotropic material transport by eddies and eddy-driven currents in a model of the North Atlantic
title_sort anisotropic material transport by eddies and eddy-driven currents in a model of the north atlantic
publisher American Meteorological Society
publishDate 2009
url https://hdl.handle.net/1912/3991
genre North Atlantic
genre_facet North Atlantic
op_source Journal of Physical Oceanography 39 (2009): 3162-3175
doi:10.1175/2009JPO4239.1
op_relation https://doi.org/10.1175/2009JPO4239.1
Journal of Physical Oceanography 39 (2009): 3162-3175
https://hdl.handle.net/1912/3991
doi:10.1175/2009JPO4239.1
op_doi https://doi.org/10.1175/2009JPO4239.1
container_title Journal of Physical Oceanography
container_volume 39
container_issue 12
container_start_page 3162
op_container_end_page 3175
_version_ 1766124529856282624