Comparing different generations of idealized solar geoengineering simulations in the Geoengineering Model Intercomparison Project (GeoMIP) - Sorbonne Université Access content directly
Journal Articles Atmospheric Chemistry and Physics Year : 2021

Comparing different generations of idealized solar geoengineering simulations in the Geoengineering Model Intercomparison Project (GeoMIP)

Abstract

Solar geoengineering has been receiving increased attention in recent years as a potential temporary solution to offset global warming. One method of approximating global-scale solar geoengineering in climate models is via solar reduction experiments. Two generations of models in the Geoengineering Model Intercomparison Project (GeoMIP) have now simulated offsetting a quadrupling of the CO2 concentration with solar reduction. This simulation is idealized and designed to elicit large responses in the models. Here, we show that energetics, temperature, and hydrological cycle changes in this experiment are statistically indistinguishable between the two ensembles. Of the variables analyzed here, the only major differences involve highly parameterized and uncertain processes, such as cloud forcing or terrestrial net primary productivity. We conclude that despite numerous structural differences and uncertainties in models over the past two generations of models, including an increase in climate sensitivity in the latest generation of models, the models are consistent in their aggregate climate response to global solar dimming.
Fichier principal
Vignette du fichier
acp-21-4231-2021.pdf (14.27 Mo) Télécharger le fichier
Origin Publication funded by an institution

Dates and versions

hal-03184233 , version 1 (29-03-2021)

Identifiers

Cite

Ben Kravitz, Douglas G Macmartin, Daniele Visioni, Olivier Boucher, Jason N S Cole, et al.. Comparing different generations of idealized solar geoengineering simulations in the Geoengineering Model Intercomparison Project (GeoMIP). Atmospheric Chemistry and Physics, 2021, 21 (6), pp.4231 - 4247. ⟨10.5194/acp-21-4231-2021⟩. ⟨hal-03184233⟩
74 View
31 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More