Stratospheric heating by potential geoengineering aerosols

  title={Stratospheric heating by potential geoengineering aerosols},
  author={Angus J. Ferraro and E. J. Highwood and Andrew James Charlton-Perez},
  journal={Geophysical Research Letters},
A fixed dynamical heating model is used to investigate the pattern of zonal‐mean stratospheric temperature change resulting from geoengineering with aerosols composed of sulfate, titania, limestone and soot. Aerosol always heats the tropical lower stratosphere, but at the poles the response can be either heating, cooling, or neutral. The sign of the change in stratospheric Pole‐Equator temperature difference depends on aerosol type, size and season. This has implications for modeling… 

Weakened tropical circulation and reduced precipitation in response to geoengineering

Geoengineering by injection of reflective aerosols into the stratosphere has been proposed as a way to counteract the warming effect of greenhouse gases by reducing the intensity of solar radiation

Stratospheric dynamics and midlatitude jets under geoengineering with space mirrors and sulfate and titania aerosols

The impact on the dynamics of the stratosphere of three approaches to geoengineering by solar radiation management is investigated using idealized simulations of a global climate model. The

Stratospheric Response in the First Geoengineering Simulation Meeting Multiple Surface Climate Objectives

We describe here changes in stratospheric dynamics and chemistry in a first century‐long sulfate aerosol geoengineering simulation in which the mean surface temperature and the interhemispheric and

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Climate System Response to Stratospheric Sulfate Aerosols: Sensitivity to Altitude of Aerosol Layer

Abstract. Reduction of surface temperatures of the planet by injecting sulfate aerosols in the stratosphere has been suggested as an option to reduce the amount of human-induced climate warming.

Sensitivity of stratospheric geoengineering with black carbon to aerosol size and altitude of injection

[1] Simulations of stratospheric geoengineering with black carbon (BC) aerosols using a general circulation model with fixed sea surface temperatures show that the climate effects strongly depend on

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Injection of sulfate aerosols into the stratosphere has the potential to reduce the climate impacts of global warming, including sea level rise (SLR). However, changes in atmospheric and oceanic

Improved aerosol radiative properties as a foundation for solar geoengineering risk assessment

Side effects resulting from the deliberate injection of sulfate aerosols intended to partially offset climate change have motivated the investigation of alternatives, including solid aerosol

Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering

Stratospheric aerosol geoengineering has been proposed as a potential solution to reduce climate change and its impacts. Here, we explore the responses of the Hadley circulation (HC) intensity and

Sensitivity of the radiative forcing by stratospheric sulfur geoengineering to the amount and strategy of the SO 2 injection studied with the LMDZ-S3A model

Abstract. The enhancement of the stratospheric sulfate aerosol layer has been proposed as a method of geoengineering to abate global warming. Previous modelling studies found that stratospheric



Modelling the size distribution of geoengineered stratospheric aerosols

A modelling study on the growth of geoengineered stratospheric aerosols reveals that in steady state a large fraction of aerosols grow to micrometre sizes so that the sedimentation of aerosols might

Impact of geoengineered aerosols on the troposphere and stratosphere

A coupled chemistry climate model, the Whole Atmosphere Community Climate Model was used to perform a transient climate simulation to quantify the impact of geoengineered aerosols on atmospheric

The dependency of geoengineered sulfate aerosol on the emission strategy

The climatic effect of geoengineered stratospheric sulfate aerosol depends on the strategy for sulfur emission that determines the microphysical evolution of the resulting sulfate layer, in

Stratospheric aerosols: Formation, properties, effects

Might dimming the sun change atmospheric ENSO teleconnections as we know them?

We use a troposphere–stratosphere chemistry‐climate model to investigate the impact of a 10% reduction in solar irradiance. Starting from the changes in global mean surface temperature modelled, we

The impact of geoengineering aerosols on stratospheric temperature and ozone

Anthropogenic greenhouse gas emissions are warming the global climate at an unprecedented rate. Significant emission reductions will be required soon to avoid a rapid temperature rise. As a potential

Regional climate responses to geoengineering with tropical and Arctic SO2 injections

[1] Anthropogenic stratospheric aerosol production, so as to reduce solar insolation and cool Earth, has been suggested as an emergency response to geoengineer the planet in response to global

The temperature response to stratospheric water vapour changes

This study uses an analytical model, based on the cooling‐to‐space approximation, and a fixed dynamical heating model to investigate the structure of the stratospheric cooling that occurs in response

An overview of geoengineering of climate using stratospheric sulphate aerosols

  • P. RaschS. Tilmes R. Garcia
  • Environmental Science
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2008
An overview of geoengineering by stratospheric sulphate aerosols is provided, summarizing the past 30 years of work, highlighting some very recent studies using climate models, and discussing methods used to deliver sulphur species to the stratosphere.

Stratospheric Sensitivity to Perturbations in Ozone and Carbon Dioxide: Radiative and Dynamical Response.

Abstract We have attempted to assess the stratospheric effects of two different perturbations: 1) a uniform 50% reduction in ozone; and 2) a uniform doubling of carbon dioxide. The primary studies