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Transient and Quasi‐Equilibrium Climate States at 1.5°C and 2°C Global Warming

handle: 11343/302425
Transient and Quasi‐Equilibrium Climate States at 1.5°C and 2°C Global Warming
AbstractRecent climate change is characterized by rapid global warming, but the goal of the Paris Agreement is to achieve a stable climate where global temperatures remain well below 2°C above pre‐industrial levels. Inferences about conditions at or below 2°C are usually made based on transient climate projections. To better understand climate change impacts on natural and human systems under the Paris Agreement, we must understand how a stable climate may differ from transient conditions at the same warming level. Here we examine differences between transient and quasi‐equilibrium climates using a statistical framework applied to greenhouse gas‐only model simulations. This allows us to infer climate change patterns at 1.5°C and 2°C global warming in both transient and quasi‐equilibrium climate states. We find substantial local differences between seasonal‐average temperatures dependent on the rate of global warming, with mid‐latitude land regions in boreal summer considerably warmer in a transient climate than a quasi‐equilibrium state at both 1.5°C and 2°C global warming. In a rapidly warming world, such locations may experience a temporary emergence of a local climate change signal that weakens if the global climate stabilizes and the Paris Agreement goals are met. Our research demonstrates that the rate of global warming must be considered in regional projections.
- Cornell University United States
- University of Melbourne Australia
- Pohang University of Science and Technology Korea (Republic of)
- Wellington Management Company United States
- Pohang University of Science and Technology Korea (Republic of)
IMPACTS, stabilized climate, 550, EXPERIMENTAL-DESIGN, rapid warming, MECHANISMS, Atmospheric Sciences, EMERGENCE, GE1-350, Physical Geography and Environmental Geoscience not elsewhere classified, TEMPERATURE, CMIP6, QH540-549.5, MODEL INTERCOMPARISON PROJECT, 13 Climate Action, Ecology, Environmental Science and Management not elsewhere classified, 40699 Physical Geography and Environmental Geoscience not elsewhere classified, FOS: Earth and related environmental sciences, SIMULATIONS, TIME, Environmental sciences, climate change, 1.5 DEGREES-C, Paris agreement, SEA-ICE, 50299 Environmental Science and Management not elsewhere classified
IMPACTS, stabilized climate, 550, EXPERIMENTAL-DESIGN, rapid warming, MECHANISMS, Atmospheric Sciences, EMERGENCE, GE1-350, Physical Geography and Environmental Geoscience not elsewhere classified, TEMPERATURE, CMIP6, QH540-549.5, MODEL INTERCOMPARISON PROJECT, 13 Climate Action, Ecology, Environmental Science and Management not elsewhere classified, 40699 Physical Geography and Environmental Geoscience not elsewhere classified, FOS: Earth and related environmental sciences, SIMULATIONS, TIME, Environmental sciences, climate change, 1.5 DEGREES-C, Paris agreement, SEA-ICE, 50299 Environmental Science and Management not elsewhere classified
8 Research products, page 1 of 1
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citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).15 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
