Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation
The interannual variability in upper-ocean (0 - 400 m) temperature and governing mechanisms for the period 1968 - 97 are quantified from a global ocean hindcast simulation driven by atmospheric reanalysis and satellite data products. The unconstrained simulation exhibits considerable skill in replic...
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American Meteorological Society
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-224 https://doi.org/10.1175/JPO3089.1 |
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ftncar:oai:drupal-site.org:articles_6894 2023-10-01T03:52:13+02:00 Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation Doney, Scott (author) Yeager, Stephen (author) Danabasoglu, Gokhan (author) Large, William (author) McWilliams, James (author) 2007-07-01 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-224 https://doi.org/10.1175/JPO3089.1 en eng American Meteorological Society Journal of Physical Oceanography http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-224 doi:10.1175/JPO3089.1 ark:/85065/d7n016s6 Copyright 2007 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Advection Air-sea interaction Interannual variability Text article 2007 ftncar https://doi.org/10.1175/JPO3089.1 2023-09-04T18:22:03Z The interannual variability in upper-ocean (0 - 400 m) temperature and governing mechanisms for the period 1968 - 97 are quantified from a global ocean hindcast simulation driven by atmospheric reanalysis and satellite data products. The unconstrained simulation exhibits considerable skill in replicating the observed interannual variability in vertically integrated heat content estimated from hydrographic data and monthly satellite sea surface temperature and sea surface height data. Globally, the most significant interannual variability modes arise from El Niño-Southern Oscillation and the Indian Ocean zonal mode, with substantial extension beyond the Tropics into the midlatitudes. In the well-stratified Tropics and subtropics, net annual heat storage variability is driven predominately by the convergence of the advective heat transport, mostly reflecting velocity anomalies times the mean temperature field. Vertical velocity variability is caused by remote wind forcing, and subsurface temperature anomalies are governed mostly by isopycnal displacements (heave). The dynamics at mid- to high latitudes are qualitatively different and vary regionally. Interannual temperature variability is more coherent with depth because of deep winter mixing and variations in western boundary currents and the Antarctic Circumpolar Current that span the upper thermocline. Net annual heat storage variability is forced by a mixture of local air - sea heat fluxes and the convergence of the advective heat transport, the latter resulting from both velocity and temperature anomalies. Also, density-compensated temperature changes on isopycnal surfaces (spice) are quantitatively significant. Article in Journal/Newspaper Antarc* Antarctic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Indian The Antarctic Journal of Physical Oceanography 37 7 1918 1938 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Advection Air-sea interaction Interannual variability |
spellingShingle |
Advection Air-sea interaction Interannual variability Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
topic_facet |
Advection Air-sea interaction Interannual variability |
description |
The interannual variability in upper-ocean (0 - 400 m) temperature and governing mechanisms for the period 1968 - 97 are quantified from a global ocean hindcast simulation driven by atmospheric reanalysis and satellite data products. The unconstrained simulation exhibits considerable skill in replicating the observed interannual variability in vertically integrated heat content estimated from hydrographic data and monthly satellite sea surface temperature and sea surface height data. Globally, the most significant interannual variability modes arise from El Niño-Southern Oscillation and the Indian Ocean zonal mode, with substantial extension beyond the Tropics into the midlatitudes. In the well-stratified Tropics and subtropics, net annual heat storage variability is driven predominately by the convergence of the advective heat transport, mostly reflecting velocity anomalies times the mean temperature field. Vertical velocity variability is caused by remote wind forcing, and subsurface temperature anomalies are governed mostly by isopycnal displacements (heave). The dynamics at mid- to high latitudes are qualitatively different and vary regionally. Interannual temperature variability is more coherent with depth because of deep winter mixing and variations in western boundary currents and the Antarctic Circumpolar Current that span the upper thermocline. Net annual heat storage variability is forced by a mixture of local air - sea heat fluxes and the convergence of the advective heat transport, the latter resulting from both velocity and temperature anomalies. Also, density-compensated temperature changes on isopycnal surfaces (spice) are quantitatively significant. |
author2 |
Doney, Scott (author) Yeager, Stephen (author) Danabasoglu, Gokhan (author) Large, William (author) McWilliams, James (author) |
format |
Article in Journal/Newspaper |
title |
Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
title_short |
Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
title_full |
Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
title_fullStr |
Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
title_full_unstemmed |
Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
title_sort |
mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
publisher |
American Meteorological Society |
publishDate |
2007 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-224 https://doi.org/10.1175/JPO3089.1 |
geographic |
Antarctic Indian The Antarctic |
geographic_facet |
Antarctic Indian The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Journal of Physical Oceanography http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-004-224 doi:10.1175/JPO3089.1 ark:/85065/d7n016s6 |
op_rights |
Copyright 2007 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JPO3089.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
37 |
container_issue |
7 |
container_start_page |
1918 |
op_container_end_page |
1938 |
_version_ |
1778517977720684544 |