Breaking: Your iPhone charger isn't the only factor in determining Antarctic sea temperatures

Past Antarctic cooling may help global warming study - baltimoresun.com

OSLO (Reuters) - Sea temperatures off the Antarctic Peninsula have cooled over the past 12,000 years, according to a study on Wednesday that may help scientists understand the impact of modern global warming on the frozen continent.
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The report, based on biological material in sediments, said: "Surface ocean temperatures at the continental margin of the western Antarctic Peninsula cooled by 3-4 degrees Celsius (5.4 to 7.2 F) over the past 12,000 years."

The cooling, caused by shifts in the Earth's orbit around the sun, cut sea temperatures in the area to around zero Celsius in past decades.
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Wednesday's study also said the cooler trend was masked by shorter-term swings of between 2 and 4 degrees Celsius, apparently linked in the past 2,000 years to a new, natural influence of tropical Pacific weather patterns.