"under a scenario" is correct and usable in written English.
You can use it to refer to a hypothetical future event or situation. For example, "Under a scenario in which the economy contracts, there could be a significant decline in the housing market."
Economic damages from premature deaths due to high heat alone could reach $141 billion a year, under a scenario assuming high greenhouse-gas emissions.
The same largely applies even under a scenario in which Colonel Qaddafi somehow remains in power.
Reduced snow cover under a scenario of winter warming would stimulate soil carbon storage in these alpine forests.
The paper presents a simulation 'experiment' that compares different land use strategies under a scenario of fluctuating rubber price.
The approach adopted involves expert opinion of how the two land cover datasets relate under a scenario of idealised relations.
Results indicate that reducing GHG emissions and stabilizing atmospheric concentrations, under a scenario consistent with the Paris Agreement, could stabilize risks to infrastructure after mid-century.
Hansen et al. (1981) global warming projections under a scenario of high energy growth (red) and slow energy growth (blue) vs. observations (black).
He would therefore not have been plotting how to get rid of Johnson under a scenario that he never imagined was going to arise.
This could nearly double by 2050, according to new projections by the OECD, under a scenario in which cost pressures persist.
The RCP8.5 (Representative Concentration Pathway high emissions scenario) simulation is a future projected climate experiment under a scenario of high emissions of greenhouse gases into the twenty-first century, continuing from the end of the historical simulations.
This collaboration between five energy climate modelling teams show that instead — under a scenario of abundant natural gas availability — increased consumption will have little or no impact on climate change.
