By DEB RIECHMANNWASHINGTON (AP) a¿¿ The U.S. is racing to keep pace with stepped-up activity in the once sleepy Arctic frontier, but it is far from being in the lead. Nations across the world are hurrying to stake claims to the Arctic's resources, which might be home to 13 percent of the world's undiscovered oil and 30 percent of its untapped natural gas. There are emerging fisheries and hidden minerals. Cruise liners loaded with tourists are sailing the Arctic's frigid waters in increasing numbers. Cargo traffic along the Northern Sea Route, one of two shortcuts across the top of the Earth in summer, is on the rise. The U.S., which takes over the two-year rotating chairmanship of the eight-nation Arctic Council in 2015, has not ignored the Arctic, but critics say the U.S. is lagging behind the other seven: Russia, Norway, Sweden, Finland, Iceland, Canada and Denmark, through the semiautonomous territory of Greenland. "On par with the other Arctic nations, we are behind a¿¿ behind in our thinking, behind in our vision," Sen. Lisa Murkowski, R-Alaska, said. "We lack basic infrastructure, basic funding commitments to be prepared for the level of activity expected in the Arctic." At a meeting before Thanksgiving with Secretary of State John Kerry, Murkowski suggested he name a U.S. ambassador or envoy to the Arctic a¿¿ someone who could coordinate work on the Arctic being done by more than 20 federal agencies and take the lead on increasing U.S. activities in the region. Murkowski is trying to get Americans to stop thinking that the Arctic is just Alaska's problem. "People in Iowa and New Hampshire need to view the U.S. as an Arctic nation. Otherwise when you talk about funding, you're never going to get there," Murkowski said. She added that even non-Arctic nations are deeply engaged: "India and China are investing in icebreakers."