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    Will US role at climate talks change after storm?

    DOHA, Qatar — During a year with a monster storm and scorching heat waves, Americans have experienced the kind of freakish weather that many scientists say will occur more often on a warming planet.

    And as a reelected president talks about global warming again, climate activists are cautiously optimistic that the United States will be more than a disinterested bystander when the UN climate talks resume Monday with a two-week conference in Qatar.

    ‘‘I think there will be expectations from countries to hear a new voice from the United States,’’ said Jennifer Morgan, director of the climate and ­energy program at the World Resources Institute in Washington.


    The climate officials and environment ministers meeting in the Qatari capital of Doha will not come up with an answer to the global temperature rise that is already melting Arctic sea ice and permafrost, raising and acidifying the seas, and shifting rainfall patterns, which has an impact on floods and droughts.

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    They will focus on side ­issues, like extending the Kyoto Protocol — an expiring emissions pact with a dwindling number of members — and ramping up climate financing for poor nations.

    They will also try to structure the talks for a new global climate deal that is supposed to be adopted in 2015, a process in which American leadership is considered crucial.

    Many were disappointed that President Obama didn’t put more emphasis on climate change during his first term. He took some steps to rein in emissions of heat-trapping gases, such as sharply increasing fuel efficiency standards for cars and trucks. But a climate bill that would have capped US emissions stalled in the Senate.

    ‘‘We need the US to engage even more,’’ European Union Climate Commissioner Connie Hedegaard said. ‘‘Because that can change the dynamic of the talks.’’


    The world tried to move forward without the United States after the Bush administration abandoned the Kyoto Protocol, a 1997 pact limiting greenhouse emissions from industrialized nations. As that agreement expires this year, the climate curves are still pointing in the wrong direction.

    The concentration of heat-trapping gases like carbon dioxide has jumped 20 percent since 2000, primarily from the burning of fossil fuels like coal and oil, according to a UN report released recently. And each year, the gap between what researchers say must be done to reverse this trend, and what’s actually being done, gets wider.

    Bridging that gap, through clean technology and renewable energy, is not just up to the United States, but to countries like India and China, whose carbon emissions are growing the fastest as their economies expand.

    But Obama raised hopes of a more robust US role in the talks when he called for a national ‘‘conversation’’ on climate change after winning reelection. The issue had been virtually absent in the presidential campaign until Hurricane Sandy hit the East Coast.

    Obama still faces domestic political constraints, and there’s little hope of the United States increasing its voluntary pledge in the UN talks of cutting emissions by 17 percent by 2020, compared with 2005 levels.


    Still, just a signal that Washington has faith in the international process would go a long way, analysts said.

    ‘‘The perception of many negotiators and countries is that the US is not really interested in increasing action on climate change in general,’’ said Bill Hare, senior scientist at Cli­mate Analytics, a nonprofit organization based in Berlin.