Paper: Lunt et al 2008b

Title: ''Sunshade World'': A fully coupled GCM evaluation of the climatic impacts of geoengineering

For a fuller description of the paper itself, go to the end of this web page.

Each simulation published in this paper corresponds to a unique 5 or 6 character code on the web pages.
The following table lists the name of the simulation as used in the paper, and the corresponding code name

The webpage gives you the ability to examine the published simulations, but you can also download the raw (netcdf) files to perform your own analysis. Detailed instructions on how to use the webpages and access the data can be found here: Using_BRIDGE_webpages.pdf

There are 6 simulations used in this paper: 3 different ice sheet states on 2 different palaeogeographies at the EOT

You can have make you own analysis and plots by going here

Simulation Name as in PaperSimulation name on web pages
Pre - Preindustrial controlxbowl
Fut - 4xCO2xbown
Geo - 4xCO2 with mirrorxbowp


This is a fuller description of paper

This paper shows that sunshade geoengineering does not retrieve a preindustrial climate

NameLunt et al
Brief DescriptionThis paper shows that sunshade geoengineering does not retrieve a preindustrial climate
Full Author ListD.J. Lunt, A. Ridgwell, P.J. Valdes and A. Seale
Title''Sunshade World'': A fully coupled GCM evaluation of the climatic impacts of geoengineering
Year2008
JournalGeophysical Research Letters
Volume35
Issue3-4
PagesL12710
DOIdoi:10.1029/2008GL033674
Contact's NameDan Lunt
Contact's emailD.J.Lunt@bristol.ac.uk
AbstractSunshade geoengineering - the installation of reflective mirrors between the Earth and the Sun to reduce incoming solar radiation, has been proposed as a mitigative measure to counteract anthropogenic global warming. Although the popular conception is that geoengineering can re-establish a 'natural' pre-industrial climate, such a scheme would itself inevitably lead to climate change, due to the different temporal and spatial forcing of increased CO2 compared to reduced solar radiation. We investigate the magnitude and nature of this climate change for the first time within a fully coupled General Circulation Model. We find significant cooling of the tropics, warming of high latitudes and related sea ice reduction, a reduction in intensity of the hydrological cycle, reduced ENSO variability, and an increase in Atlantic overturning. However, the changes are small relative to those associated with an unmitigated rise in CO2 emissions. Other problems such as ocean acidification remain unsolved by sunshade geoengineering