ORONO — University of Maine researchers are taking part in an international scientific expedition to the Arctic.

Two professors and two graduate students from the School of Marine Sciences are participating in the Tara Oceans Polar Circle Expedition 2013 to investigate Arctic planktonic ecosystems in the context of climate change.

About 40 scientists from 11 countries are taking turns aboard the schooner Tara, sampling plankton as the vessel circumnavigates the Arctic Ocean in the coming six months.

Professor Lee Karp-Boss will be on board for about a month beginning later this month. Her husband, fellow professor Emmanuel Boss, will join the vessel for two or three months beginning in September.

Oceanography graduate student Alison Chase boarded the vessel May 19, while Thomas Leeuw will be on board beginning in August.

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