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Recent freshening of the East Australian Current and its eddies
Citation
Rykova, T and Oke, PR, Recent freshening of the East Australian Current and its eddies, Geophysical Research Letters, 42, (21) pp. 9369-9378. ISSN 0094-8276 (2015) [Refereed Article]
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Copyright Statement
Copyright 2015 American Geophysical Union
Abstract
The East Australian Current (EAC) has a relatively weak mean flow and an energetic eddy field that dominates the circulation. The properties of the mean flow have been studied in detail, but the changes in the eddy field have received little attention. We analyze Argo temperature and salinity profiles for 2005–2012 to construct a picture of the time-mean and time-varying properties of EAC eddies. We find that eddies and the surrounding waters of the western Tasman Sea are freshening at a rate of 0.017–0.025 practical salinity unit/yr over the top 100 m, with no significant temperature change. Consistent with the observations, fields from an eddy-resolving ocean model show freshening, with no temperature trend. Moreover, the model results indicate that observed changes are significant in the context of the variability over the last 20 years and may be part of a multiyear (perhaps decadal) cycle. We attribute the freshening of the region to increased precipitation off Eastern Australia.
Item Details
Item Type: | Refereed Article |
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Research Division: | Earth Sciences |
Research Group: | Oceanography |
Research Field: | Physical oceanography |
Objective Division: | Environmental Management |
Objective Group: | Marine systems and management |
Objective Field: | Oceanic processes (excl. in the Antarctic and Southern Ocean) |
UTAS Author: | Rykova, T (Dr Tatiana Rykova) |
UTAS Author: | Oke, PR (Dr Peter Oke) |
ID Code: | 118714 |
Year Published: | 2015 |
Web of Science® Times Cited: | 19 |
Deposited By: | Zoology |
Deposited On: | 2017-07-18 |
Last Modified: | 2017-08-29 |
Downloads: | 133 View Download Statistics |
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