Question
A 2024 paper by Schleussner et al. contrasts a “peak and decline” pathway involving this phenomenon with one involving “enhanced protection” that eventually descends back below a desired limit. For 10 points each:
[10h] Name this phenomenon in which temperatures will exceed the 1.5-degree global warming goal set in the 2015 Paris Agreement.
ANSWER: overshoot [or climate overshoot]
[10m] Failing to meet a peak and decline pathway will result in “continued long-term warming” due to one of these processes. These general processes include ones named for Jacob Bjerknes (“BYURK-niss”).
ANSWER: feedbacks [or feedback mechanisms; or feedback loops; or Earth-system feedbacks; or positive feedback loops; accept climate change feedbacks or ice–albedo feedback or Bjerknes feedback]
[10e] The paper models climate outcomes in the “long-term state” and a warming phase that is called “pre-” this goal. This goal involves removing one ton of greenhouse gases for every ton emitted.
ANSWER: net-zero [or net-zero carbon emissions; accept climate neutrality]
<Johns Hopkins, Other Science>
Summary
| California | 2025-02-01 | Y | 3 | 13.33 | 100% | 33% | 0% |
| Lower Mid-Atlantic | 2025-02-01 | Y | 6 | 8.33 | 50% | 33% | 0% |
| Midwest | 2025-02-01 | Y | 6 | 15.00 | 83% | 50% | 17% |
| Northeast | 2025-02-01 | Y | 5 | 16.00 | 80% | 80% | 0% |
| Pacific Northwest | 2025-02-01 | Y | 2 | 20.00 | 100% | 100% | 0% |
| South Central | 2025-02-01 | Y | 2 | 15.00 | 100% | 50% | 0% |
| Southeast | 2025-02-01 | Y | 1 | 20.00 | 100% | 100% | 0% |
| Upper Mid-Atlantic | 2025-02-01 | Y | 8 | 11.25 | 63% | 50% | 0% |
Data
| Georgia Tech C | Bruin A | 0 | 10 | 10 | 20 |