What causes long-term temporal changes in the South Atlantic?.

Holfort, Jürgen, Vanicek, Michael and Siedler, Gerold (2000) What causes long-term temporal changes in the South Atlantic?. Open Access Geophysical Research Letters, 27 (8). pp. 1187-1190. DOI 10.1029/1999GLO11222.

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Two zonal sections at 11°S in the South Atlantic, separated in time by 11 years, provide temperature differences in the deep ocean.
The aim of this case study is to check whether intrinsic temperature changes are sufficiently large to identify long-term water mass
property variations which could be related to climate change. Potential temperature differences on isobaric surfaces in the deep ocean
here reach several tenths of °C. They can be caused by vertical (cross-isopycnal) or horizontal (isopycnal) advection and mixing, or
by intrinsic water mass changes. The effect of vertical transport is removed by using neutral (density) surfaces. The effect of
horizontal transport is determined by using a mixing parameterization for temperature and silica on neutral surfaces. The residual
intrinsic temperature changes are, with a few local exceptions, within the range of the ±0.05°C uncertainty, and the temperature
changes can thus be explained by advection and mixing alone.

Document Type: Article
Keywords: Physical Oceanography
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/1999GLO11222
ISSN: 0094-8276
Date Deposited: 18 Feb 2008 17:24
Last Modified: 13 Feb 2018 14:34
URI: http://oceanrep.geomar.de/id/eprint/5911

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