New York City Mayor Michael Bloomberg endorsed President Barack Obama on Thursday, invoking Hurricane Sandy and the president's work to address climate change.

As New York reels from the fallout of this week's hurricane, which caused 37 deaths in the city, Bloomberg said Obama was better-suited than Republican presidential nominee Mitt Romney to curb carbon emissions.

"The devastation that Hurricane Sandy brought to New York City and much of the Northeast – in lost lives, lost homes and lost business – brought the stakes of Tuesday’s presidential election into sharp relief," Bloomberg wrote. "Our climate is changing. And while the increase in extreme weather we have experienced in New York City and around the world may or may not be the result of it, the risk that it might be – given this week's devastation – should compel all elected leaders to take immediate action."

The three-term mayor and billionaire further lauded Obama for taking "major steps to reduce our carbon consumption." In turn, Bloomberg said that on the issue of climate change, Romney had "reversed course, abandoning the very cap-and-trade program he once supported."

A former Republican who has since declared himself independent, Bloomberg did not make an endorsement for president in 2008. He cited other issues, including Obama's health care reform law, approach to abortion rights and support for same-sex marriage, in reaching his conclusion.

Eduardo Munoz / Reuters

New York Mayor Michael Bloomberg speaks to the media during a news conference about Updates to New Yorkers on Preparations for Hurricane Sandy in New York, October 26, 2012.

"I'm honored to have Mayor Bloomberg's endorsement. I deeply respect him for his leadership in business, philanthropy and government, and appreciate the extraordinary job he's doing right now, leading New York City through these difficult days," Obama said in a statement.

The endorsement comes, though, amid one of the worst storms to batter the New York area in recent history, Obama's response to which has drawn him plaudits from a bipartisan array of figures, including New Jersey Gov. Chris Christie (R).

Obama also added: "While we may not agree on every issue, Mayor Bloomberg and I agree on the most important issues of our time - that the key to a strong economy is investing in the skills and education of our people, that immigration reform is essential to an open and dynamic democracy, and that climate change is a threat to our children's future, and we owe it to them to do something about it."

*** UPDATE *** An Obama campaign official told NBC's Kristen Welker it's impossible to know the impact of the endorsement but called it a "net positive" citing the fact that Bloomberg has an audience of independent-minded voters. Campaign officials say they were made aware the of the endorsement before Bloomberg announced it.  

One Republican operative suggested the endorsement could actually hurt the president calling Bloomberg "the most anti-gun politician" in the country. The operative predicted the endorsement won't play well in states with heavy-hunting populations like, Wisconsin, Pennsylvania or Minnesota.  "So congratulations, Mr. President," the operative said sardonically. 

Republican presidential candidate Jon Huntsman appeared to take a notably more skeptical view towards current climate change science Tuesday, saying that the "scientific community owes us more" on the issue and that not enough solid research exists to "formulate policies" based on global warming.

"I'm not a scientist, I'm not a physicist, but I would defer to science in that discussion, and I would say that the scientific community owes us more in terms of a better description or explanation about what might lie beneath all of this," Huntsman told an audience of bloggers at the conservative Heritage Foundation in Washington.

"But there's not enough information right now to be able to formulate policies in terms of addressing it overall, primarily because it's a global issue," he went on. "We can enact policies here. But I wouldn't want to unilaterally disarm as a country, I wouldn't want to hinder job creators during a time when our economy is flat."

Huntsman made waves earlier this summer when he took aim at his GOP rivals for expressing skepticism about evolution and climate change science, sending out a much-retweeted message in August that read, "To be clear, I believe in evolution and trust scientists on global warming. Call me crazy.”

Asked by a reporter Tuesday whether he has reversed that position, Huntsman said that he still "defers" to scientists who study the issue but said that there remain conflicts among the research community.

"Because ... there are questions about the validity of the science, evidence by one university over in Scotland recently, I think the onus is on the scientific community to provide more in the way of information, to help clarify the situation, that's all."

Huntsman also compared the issue of climate change to cancer research.

"If there's some interruption or disconnect in terms of what other scientists have to say, then let the debate play out within the scientific community," he said. "I think that's where we are. There's probably more debate yet to play out."

Huntsman also took questions from attendees about trade policy, education, and the United Nations. He echoed criticisms of one federal agency often derided by his fellow Republicans, telling the audience "I'm still trying to find the value added of the Department of Education."

Spokesman Tim Miller described the former Utah governor's position as consistent, saying that Huntsman has consistently said that if 90 percent of climate scientists agree on the effects of man-made warming, "he trusts their position."

"That was his position then and it's his position now," Miller said, adding that Huntsman's statement today related more specifically to the global nature of the problem -- that United States policy should not be shaped around the threat of global warming until the science is indisputably settled and "until the Chinese are on board."