Forcing of anthropogenic aerosols on temperature trends of the sub-thermocline southern Indian Ocean
Article
Article Title | Forcing of anthropogenic aerosols on temperature trends of the sub-thermocline southern Indian Ocean |
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ERA Journal ID | 201487 |
Article Category | Article |
Authors | Cowan, Tim, Cai, Wenju, Purich, Ariaan, Rotstayn, Leon and England, Matthew H. |
Journal Title | Scientific Reports |
Journal Citation | 3 |
Article Number | 2245 |
Number of Pages | 9 |
Year | 2013 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2045-2322 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/srep02245 |
Web Address (URL) | https://www.nature.com/articles/srep02245 |
Abstract | In the late twentieth century, the sub-thermocline waters of the southern tropical and subtropical Indian Ocean experienced a sharp cooling. This cooling has been previously attributed to an anthropogenic aerosol-induced strengthening of the global ocean conveyor, which transfers heat from the subtropical gyre latitudes toward the North Atlantic. From the mid-1990s the sub-thermocline southern Indian Ocean experienced a rapid temperature trend reversal. Here we show, using climate models from phase 5 of the Coupled Model Intercomparison Project, that the late twentieth century sub-thermocline cooling of the southern Indian Ocean was primarily driven by increasing anthropogenic aerosols and greenhouse gases. The models simulate a slow-down in the sub-thermocline cooling followed by a rapid warming towards the mid twenty-first century. The simulated evolution of the Indian Ocean temperature trend is linked with the peak in aerosols and their subsequent decline in the twenty-first century, reinforcing the hypothesis that aerosols influence ocean circulation trends. |
Keywords | Attribution; Physical oceanography; Climate and Earth system modelling; Atmospheric dynamics |
ANZSRC Field of Research 2020 | 370803. Physical oceanography |
370201. Climate change processes | |
370103. Atmospheric aerosols | |
Byline Affiliations | Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia |
ARC Centre of Excellence for Climate System Science, Australia | |
University of New South Wales |
https://research.usq.edu.au/item/z09x7/forcing-of-anthropogenic-aerosols-on-temperature-trends-of-the-sub-thermocline-southern-indian-ocean
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