Climate Overshoot: Accumulated Effects Persist After Temperatures Fall
You can run your car engine at high RPMs without much lasting issue but the atmosphere is a lot trickier. It may seem that temporary overshoots of warming targets are okay but getting back down below 2 degrees Celcius won’t undo the effects that occur in permafrost and oceans, according to a new paper using Earth System Climate Model to compare 42 pairs of climate scenarios and estimate what might occur.
In each model pair, one scenario temporarily exceeded its warming pathway before returning to it, while the other stayed below the threshold.
Overshoot was measured using “degree-years” which combined how much global temperatures exceed a target and how long they remained above it. The scholars found that degree-years were a strong predictor of lasting changes in several climate variables but some variables were found to be much more susceptible to warming than others.
For example, permafrost experienced almost no recovery of its lost carbon when higher temperatures returned to their baseline levels. Also persisting after overshoot were changes to sea-level rise, ocean warming and ocean oxygen levels.
The authors say that the peak level of warming alone does not tell the whole story and policy makers also need to factor in the length of time spent above a target to consider how much lasting change will remain. Therefore, climate goals should not be viewed simply as a temperature level that might get worse before it gets better – like if we eventually adopt green energy that works, such as nuclear – and things will be fine after temperature thresholds are exceeded and settle back. How long we stay at those temperatures matters and factoring in the accumulated effects of overshoot is necessary to better assess climate risks and adaptation measures.
Citation: Dickau, M., Zickfeld, K. & Matthews, H.D. Irreversible climate changes driven by degree-years of temperature overshoot. Commun Earth Environ (2026). DOI: 10.1038/s43247-026-03761-z
Source: https://scienceblogs.com/sb-admin/2026/09/28/climate-overshoot-accumulated-effects-persist-after-temperatures-fall-151482
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,833,215,380 |
| Stories: | 8,711,451 |
Whistler Blowers, Insiders
