Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation
Author Posting. © American Meteorological Society, 2007. 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 37 (2007): 1918-1938, doi:10.1175/jpo3089.1. The in...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4151 2023-05-15T13:53:14+02:00 Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation Doney, Scott C. Yeager, Stephen G. Danabasoglu, Gokhan Large, William G. McWilliams, James C. 2007-07 application/pdf https://hdl.handle.net/1912/4151 en_US eng American Meteorological Society https://doi.org/10.1175/jpo3089.1 Journal of Physical Oceanography 37 (2007): 1918-1938 https://hdl.handle.net/1912/4151 doi:10.1175/jpo3089.1 Journal of Physical Oceanography 37 (2007): 1918-1938 doi:10.1175/jpo3089.1 Temperature Interannual variability Advection Heating Air–sea interaction Article 2007 ftwhoas https://doi.org/10.1175/jpo3089.1 2022-05-28T22:58:11Z Author Posting. © American Meteorological Society, 2007. 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 37 (2007): 1918-1938, doi:10.1175/jpo3089.1. 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. This work was supported in part from NOAA Office of Global ... Article in Journal/Newspaper Antarc* Antarctic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic The Antarctic Indian Journal of Physical Oceanography 37 7 1918 1938 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Temperature Interannual variability Advection Heating Air–sea interaction |
spellingShingle |
Temperature Interannual variability Advection Heating Air–sea interaction Doney, Scott C. Yeager, Stephen G. Danabasoglu, Gokhan Large, William G. McWilliams, James C. Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation |
topic_facet |
Temperature Interannual variability Advection Heating Air–sea interaction |
description |
Author Posting. © American Meteorological Society, 2007. 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 37 (2007): 1918-1938, doi:10.1175/jpo3089.1. 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. This work was supported in part from NOAA Office of Global ... |
format |
Article in Journal/Newspaper |
author |
Doney, Scott C. Yeager, Stephen G. Danabasoglu, Gokhan Large, William G. McWilliams, James C. |
author_facet |
Doney, Scott C. Yeager, Stephen G. Danabasoglu, Gokhan Large, William G. McWilliams, James C. |
author_sort |
Doney, Scott C. |
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 |
https://hdl.handle.net/1912/4151 |
geographic |
Antarctic The Antarctic Indian |
geographic_facet |
Antarctic The Antarctic Indian |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Journal of Physical Oceanography 37 (2007): 1918-1938 doi:10.1175/jpo3089.1 |
op_relation |
https://doi.org/10.1175/jpo3089.1 Journal of Physical Oceanography 37 (2007): 1918-1938 https://hdl.handle.net/1912/4151 doi:10.1175/jpo3089.1 |
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 |
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1766258230581788672 |