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

Updated 1 hour ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 11:30 a.m. ET: 11,304,534 — Total deaths: 531,659 — Total recoveries — 6,111,195Map.
  2. U.S.: Total confirmed cases as of 11:30 a.m. ET: 2,841,124 — Total deaths: 129,689 — Total recoveries: 894,325 — Total tested: 34,858,427Map.
  3. States: Photos of America's pandemic July 4 ICU beds in Arizona hot spot near capacity.
  4. Public health: U.S. coronavirus infections hit record highs for 3 straight days.
  5. Politics: Trump extends PPP application deadlineNew Jersey gov. wants national face mask requirement
  6. World: Mexican leaders call for tighter border control as infections rise in U.S.
  7. Sports: 31 MLB players test positive as workouts resume.
  8. 1 📽 thing: Drive-in movie theaters are making a comeback.
3 hours ago - Sports

Sports return stalked by coronavirus

Tampa Bay Rays left fielder Austin Meadows bumps elbows Friday during a workout at Tropicana Field. Photo: Kim Klement/USA Today Sports via Reuters

When MLB teams arrived at the ballpark this weekend for the first summer workouts of 2020, the comforting sounds of baseball brought smiles to players' faces.

Between the lines: Even the loudest crack of the bat couldn't mask the eerie silence or distract from the ever-present coronavirus threat.

3 hours ago - Health

239 scientists call on WHO to recognize coronavirus as airborne

People walk at the boardwalk in Venice Beach. Photo: Apu Gomes/AFP via Getty Images

A group of 239 scientists in 32 countries is calling for the World Health Organization to revise its recommendations to account for airborne transmission as a significant factor in how the coronavirus spreads, the New York Times reports.

The big picture: The WHO has said the virus mainly spreads via large respiratory droplets that fall to the ground once they've been discharged in coughs and sneezes. But the scientists say evidence shows the virus can spread from smaller particles that linger in air indoors.