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Children in Newtok, Alaska, Oct. 2019. Thawing permafrost and flooding have forced the community to move to Mertarvik. Photo: Bonnie Jo Mount/The Washington Post via Getty Images

The Arctic's thawing permafrost could release an estimated 300 million to 600 million tons of net carbon into the atmosphere each year, according to NOAA's 2019 Arctic Report Card released Tuesday.

Why it matters: Consequences of ongoing changes in the Arctic's climate — accelerated by warming air temperatures and dwindling sea ice — will result in "altered weather patterns, increased greenhouse gas emissions and rising sea levels," the Washington Post reports.

  • Warming air temperatures are "driving changes in the Arctic environment that affect ecosystems and communities on a regional and global scale," the report reads.

Details: The Greenland Ice Sheet is contributing to global average sea-level rise, losing about 267 billion metric tons of ice each year.

  • Warming conditions in the Arctic promote the conversion of carbon stored in permafrost into greenhouse gases.
  • Arctic sea ice is shrinking in thickness, making it increasingly vulnerable to warming air and oceans.
  • May 2019 saw the fifth lowest North American Arctic snow cover in the 53 years since recording began, while June's snow cover was the third lowest.

Go deeper: Key science report shows "unprecedented" changes to oceans and frozen regions

Go deeper

Sarah Palin tests positive for COVID, delaying defamation trial

Sarah Palin. Photo: Matthew Staver/Bloomberg via Getty Images

Former Alaska Gov. Sarah Palin (R) tested positive for COVID-19 on Monday, delaying the start of her defamation trial against the New York Times.

Why it matters: The trial will be closely watched, as it's a rare instance of a major media company defending its editorial practices before an American jury.

S&P 500 slides into correction territory

Data: FactSet; Chart: Axios Visuals

Stocks suffered their worst drop of the year, pushing the S&P 500 on track to fall into a "correction."

Driving the news: The benchmark S&P 500 dropped for its fifth straight day, with losses nearing 3% in early trading.

Updated 2 hours ago - Politics & Policy

Omicron dashboard

Illustration: Aïda Amer/Axios

  1. Health: Fauci: "Confident" Omicron cases will peak in February — FDA OKs antiviral drug remdesivir for non-hospitalized patients — Walensky: CDC language "pivoting" on "fully vaccinated."
  2. Vaccines: The shifting definition of fully vaccinated — Annual vaccine preferable to boosters, says Pfizer CEO — Team USA 100% vaccinated ahead of Beijing Olympics.
  3. Politics: Virginia school boards sue Gov. Youngkin for lifting mask mandate — Gonzaga University revokes NBA great John Stockton's tickets over mask stance — Arizona governor sues Biden administration over funds tied to mandates.
  4. World: Beijing Olympic Committee lowers testing threshold ahead of Games — Beijing officials urge "emergency mode" before Winter Olympics — Austria approves vaccine mandate for adults.
  5. Variant tracker