Illustration: Rebecca Zisser/Axios

A new analysis could take a step toward resolving a fiery debate: how to think about — and describe — likely levels of future emissions and warming in light of current trends and planned policies.

Driving the news: Two scientists, in a lengthy post via the Breakthrough Institute, conclude Earth is on track to warm by roughly 3°C above pre-industrial levels by 2100.

  • "This is a far cry from the 1.5°C and 2°C targets enshrined in the Paris agreements, but is also well short of the 4°C to 5°C warming in many 'business as usual' baseline scenarios that continue to be widely used," write Zeke Hausfather and Justin Ritchie.

Why it matters: 3°C means a world far hotter than today.

  • But it's also far less than would likely be enabled by models using high and even unchecked emissions growth — scenarios that they argue, based on extending the International Energy Agency's 2040 analyses through 2100, are no longer in the cards.
  • Hausfather and Ritchie see the most likely outcome from current policies is 2.9°C-3.4°C, but that falls to 2.7°C-3°C if nations meet their existing pledges under the Paris deal.

The big picture: 3°C would mean a lot of damaging outcomes, and even warming to date is causing major harms. A big UN-led report last year explored the consequences of breaching 1.5°C (which is quite likely).

But, but, but: They argue that some commonly cited future "pathways" used in climate literature that bring much higher warming levels are looking quite unlikely for several reasons, including efforts over the past decade to move away from coal.

One level deeper: "Even a current policies scenario where emissions continued to steadily grow rather than leveling off after 2040 would still end up well-below the commonly used RCP8.5 (SSP5-8.5) scenario, which represents the highest end of the range of no-policy baseline scenarios examined in the literature."

The intrigue: Needless to say there's plenty of variables because gaming out the future of technology, policy and economic trends is really dicey. There's also uncertainty about the sensitivity of the climate to rising emissions concentrations.

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Updated 30 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 12 p.m. ET: 12,772,755 — Total deaths: 566,036 — Total recoveries — 7,030,749Map.
  2. U.S.: Total confirmed cases as of 12 p.m. ET: 3,269,531 — Total deaths: 134,898 — Total recoveries: 995,576 — Total tested: 39,553,395Map.
  3. Politics: Trump wears face mask in public for first time.
  4. States: Florida smashes single-day record for new coronavirus cases with over 15,000.
  5. Public health: Trump's coronavirus testing czar says lockdowns in hotspots "should be on the table" — We're losing the war on the coronavirus.
  6. Education: Betsy DeVos says schools that don't reopen shouldn't get federal funds — Pelosi accuses Trump of "messing with the health of our children."

Florida smashes single-day record for new coronavirus cases

Data: Covid Tracking Project; Chart: Axios Visuals

Florida reported 15,299 confirmed coronavirus cases on Sunday — a new single-day record for any state, according to its health department.

The big picture: The figure shatters both Florida's previous record of 11,458 new cases and the single-state record of 11,694 set by California last week, according to AP. It also surpasses New York's daily peak of 11,571 new cases in April, and comes just a day after Disney World reopened in Orlando.

Pelosi: Trump is "messing with the health of our children" with push to open schools

House Speaker Nancy Pelosi said on CNN's "State of the Union" Sunday that Education Secretary Betsy DeVos' aggressive push to fully reopen schools this fall is "malfeasance and dereliction of duty," accusing the Trump administration of "messing with the health of our children."

Why it matters: Trump has demanded that schools reopen as part of his efforts to juice the economy by allowing parents to return to work, despite caution from health officials that little is known about how the virus impacts children.