Deep ocean changes.pdf (2.01 MB)
Deep ocean changes near the western boundary of the South Pacific Ocean
journal contribution
posted on 2023-05-19, 08:10 authored by Sloyan, BM, Wijffels, SE, Tilbrook, B, Katsumata, K, Murata, A, Macdonald, AMRepeated occupations of two hydrographic sections in the southwest Pacific basin from the 1990s to 2000s track property changes of Antarctic Bottom Water (AABW). The largest property changes-warming, freshening, increase in total carbon, and decrease in oxygen-are found near the basin's deep western boundary between 50° and 20°S. The magnitude of the property changes decreases with increasing distance from the western boundary. At the deep western boundary, analysis of the relative importance of AABW (n >28.1 kgm-3) freshening, heating, or isopycnal heave suggests that the deep ocean stratification change is the result of both warming and freshening processes. The consistent deep ocean changes near the western boundary of the southwest Pacific basin dispel the notion that the deep oceans quiescent. High-latitude climate variability is being directly transmitted into the deep southwest Pacific basin and the global deep ocean through dynamic deep western boundary currents.
History
Publication title
Journal of Physical OceanographyVolume
43Issue
10Pagination
2132-2141ISSN
0022-3670Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Meteorological SocPlace of publication
45 Beacon St, Boston, USA, Ma, 02108-3693Rights statement
Copyright 2013 American Meteorological SocietyRepository Status
- Open