The global subduction/obduction rates : their interannual and decadal variability
MetadataShow full item record
Ventilation, including subduction and obduction, for the global oceans was examined using Simple Ocean Data Assimilation (SODA) outputs. The global subduction rate averaged over the period from 1959 to 2006 is estimated at 505.8 Sv (1 Sv ≡ 106 m3 s−1), while the corresponding global obduction rate is estimated at 482.1 Sv. The annual subduction/obduction rates vary greatly on the interannual and decadal time scales. The global subduction rate is estimated to have increased 7.6% over the past 50 years, while the obduction rate is estimated to have increased 9.8%. Such trends may be insignificant because errors associated with the data generated by ocean data assimilation could be as large as 10%. However, a major physical mechanism that induced these trends is primarily linked to changes in the Southern Ocean. While the Southern Ocean plays a key role in global subduction and obduction rates and their variability, both the Southern Ocean and equatorial regions are critically important sites of water mass formation/erosion.
Author Posting. © American Meteorological Society, 2012. 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 Climate 25 (2012): 1096–1115, doi:10.1175/2011JCLI4228.1.
Showing items related by title, author, creator and subject.
Arctic decadal variability from an idealized atmosphere-ice-ocean model : 2. Simulation of decadal oscillations Dukhovskoy, Dmitry S.; Johnson, Mark A.; Proshutinsky, Andrey (2006-06-20)A simple model of the Arctic Ocean and Greenland Sea, coupled to a thermodynamic sea ice model and an atmospheric model, has been used to study decadal variability of the Arctic ice-ocean-atmosphere climate system. The ...
Decadal variability of the upper ocean heat content in the East/Japan Sea and its possible relationship to northwestern Pacific variability Na, Hanna; Kim, Kwang-Yul; Chang, Kyung-Il; Park, Jong Jin; Kim, Kuh; Minobe, Shoshiro (American Geophysical Union, 2012-02-09)The upper ocean heat content variability in the East/Japan Sea was investigated using a 40 year temperature and salinity data set from 1968 to 2007. Decadal variability was identified as the dominant mode of variability ...
Climate variability in the equatorial Pacific Ocean induced by decadal variability of mixing coefficient Huang, Chuan Jiang; Wang, Wei; Huang, Rui Xin (American Meteorological Society, 2007-05)The circulation in the equatorial Pacific Ocean is studied in a series of numerical experiments based on an isopycnal coordinate model. The model is subject to monthly mean climatology of wind stress and surface thermohaline ...