A forum about Arctic diplomacy slated to take place in Maine’s largest city will focus on issues like climate change and shipping, and put a spotlight on its host, organizers said. The Arctic Council’s Senior Arctic Officials meeting will take place in Portland from Oct. 4-6. Officials from the council’s eight member nations, including the United States, and a host of non-governmental organizations will assemble for the midweek event. The event will also likely focus on the Arctic’s indigenous groups and energy issues, said U.S.