Impact of Multidecadal Fluctuations in the Atlantic Thermohaline Circulation on Indo-Pacific Climate Variability in a Coupled GCM
Article
Article Title | Impact of Multidecadal Fluctuations in the Atlantic Thermohaline Circulation on Indo-Pacific Climate Variability in a Coupled GCM |
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ERA Journal ID | 1978 |
Article Category | Article |
Authors | Rashid, Harun A. (Author), Power, Scott B. (Author) and Knight, Jeff R. (Author) |
Journal Title | Journal of Climate |
Journal Citation | 23 (14), pp. 4038-4044 |
Number of Pages | 7 |
Year | 2010 |
Publisher | American Meteorological Society |
Place of Publication | United States |
ISSN | 0894-8755 |
1520-0442 | |
Digital Object Identifier (DOI) | https://doi.org/10.1175/2010JCLI3430.1 |
Web Address (URL) | https://journals.ametsoc.org/view/journals/clim/23/14/2010jcli3430.1.xml |
Abstract | Using a multicentury integration of the third climate configuration of the Met Office Unified Model (HadCM3), the authors show that naturally occurring fluctuations in the Atlantic's thermohaline circulation (THC) drive small but statistically significant changes in surface air temperature, sea level pressure, and precipitation over the Indo-Pacific region. The surface temperature component of these variations may be described as an interhemispheric seesaw (consistent with earlier studies), with changes in the Southern Hemisphere smaller than those in the Northern Hemisphere. Links between THC variability and variability related to the interdecadal Pacific oscillation (IPO) are evident: when the THC is strong (weak) the IPO variance decreases (increases) considerably, and cold (La Ni \~ n a-like) IPO events tend to be stronger and more frequent when the THC is in a weak phase. This highlights the possibility that a small part of Indo-Pacific climate variability at multidecadal time scales, including some of the variability linked to the IPO, may be predictable. |
Keywords | Climate variability; Inter-decadal pacific oscillations; Multi-century integrations; Multi-decadal time scale; Multidecadal fluctuations; Naturally occurring; Northern Hemispheres; Sea level pressure; Southern Hemisphere; Surface air temperatures; Surface temperatures; Thermohaline circulations; Unified model |
ANZSRC Field of Research 2020 | 370202. Climatology |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Collaboration for Australian Weather and Climate Research, Australia |
Met Office, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6wzx/impact-of-multidecadal-fluctuations-in-the-atlantic-thermohaline-circulation-on-indo-pacific-climate-variability-in-a-coupled-gcm
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