Rapid upper ocean warming linked to declining aerosols

[OKIsItJustMe]

http://www.csiro.au/en/Portals/Media/Rapid-upper-ocean-warming-linked-to-declining-aerosols.aspx

[font face=Serif][font size=5]Rapid upper ocean warming linked to declining aerosols[/font]

[font size=4]Australian scientists have identified causes of a rapid warming in the upper subtropical oceans of the Southern Hemisphere.[/font]

22 July 2013

[font size=3]They partly attribute the observed warming, and preceding cooling trends to ocean circulation changes induced by global greenhouse gas emissions and aerosols predominantly generated in the Northern Hemisphere from human activity.

The research, by scientists from CSIRO and the University of NSW, was published today in Scientific Reports.

Mr Tim Cowan, lead author of the study, says his group was initially interested in the three decade long cooling below the surface of the Southern Hemisphere subtropical oceans from the 1960s and 1990s. "But what really caught our eye was a rapid warming of these subtropical oceans from the mid-1990s, most noticeably in the Indian Ocean between 300 m to 1000 m depth," said Mr Cowan.

This had the research team asking whether this rapid warming was partly a response to greenhouse gases overcoming the cooling effect of aerosols that peaked globally in the 1980s due to the introduction of clean air legislation across United States and Europe.

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http://dx.doi.org/10.1038/srep02245

[Demeter]

1. One of many paradoxical effects of the Clean Air Act

Another is the rising incidence of skin cancer, since pollution isn't filtering out the UV from the sun anymore.