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Title: A new Geoengineering Model Intercomparison Project (GeoMIP) experiment designed for climate and chemistry models

Journal Article · · Geoscientific Model Development (Online)
 [1];  [1];  [2];  [2];  [3];  [4];  [1];  [5];  [6]
  1. National Center for Atmospheric Research, Boulder, CO (United States)
  2. Max Planck Inst. for Meteorology, Hamburg (Germany)
  3. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Environmental Sciences
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Univ. L'Aquila (Italy). Dept. of Physical and Chemical Sciences
  6. Univ. of Colorado, Boulder, CO (United States)
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A new Geoengineering Model Intercomparison Project (GeoMIP) experiment "G4 specified stratospheric aerosols" (short name: G4SSA) is proposed to investigate the impact of stratospheric aerosol geoengineering on atmosphere, chemistry, dynamics, climate, and the environment. In contrast to the earlier G4 GeoMIP experiment, which requires an emission of sulfur dioxide (SO₂) into the model, a prescribed aerosol forcing file is provided to the community, to be consistently applied to future model experiments between 2020 and 2100. This stratospheric aerosol distribution, with a total burden of about 2 Tg S has been derived using the ECHAM5-HAM microphysical model, based on a continuous annual tropical emission of 8 Tg SO₂ yr⁻¹. A ramp-up of geoengineering in 2020 and a ramp-down in 2070 over a period of 2 years are included in the distribution, while a background aerosol burden should be used for the last 3 decades of the experiment. The performance of this experiment using climate and chemistry models in a multi-model comparison framework will allow us to better understand the impact of geoengineering and its abrupt termination after 50 years in a changing environment. The zonal and monthly mean stratospheric aerosol input data set is available at https://www2.acd.ucar.edu/gcm/geomip-g4-specified-stratospheric-aerosol-data-set.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1184960
Report Number(s):
PNNL-SA--103448; 600305000
Journal Information:
Geoscientific Model Development (Online), Journal Name: Geoscientific Model Development (Online) Journal Issue: 1 Vol. 8; ISSN 1991-9603
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (21)

Albedo enhancement by stratospheric sulfur injections: More research needed journal December 2016
Significant Contributions of Volcanic Aerosols to Decadal Changes in the Stratospheric Circulation: VOLCANIC EFFECT ON MEAN AGE AND ITS TRENDS journal October 2017
Comparison of the Fast and Slow Climate Response to Three Radiation Management Geoengineering Schemes journal November 2018
Climate Response to Pulse Versus Sustained Stratospheric Aerosol Forcing journal August 2019
A round Earth for climate models journal September 2019
Multiple input control strategies for robust and adaptive climate engineering in a low-order 3-box model journal September 2018
Review of the global models used within phase 1 of the Chemistry-Climate Model Initiative (CCMI) text January 2017
Review of the global models used within phase 1 of the Chemistry-Climate Model Initiative (CCMI) text January 2017
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design text January 2018
What is the limit of climate engineering by stratospheric injection of SO 2 ? journal January 2015
Stratospheric sulfate geoengineering could enhance the terrestrial photosynthesis rate journal January 2016
Heterogeneous reaction of ClONO 2 with TiO 2 and SiO 2 aerosol particles: implications for stratospheric particle injection for climate engineering journal January 2016
Impacts of stratospheric sulfate geoengineering on tropospheric ozone journal January 2017
Sulfate geoengineering: a review of the factors controlling the needed injection of sulfur dioxide journal January 2017
The G4Foam Experiment: global climate impacts of regional ocean albedo modification journal January 2017
Changes in clouds and thermodynamics under solar geoengineering and implications for required solar reduction journal January 2018
Upper tropospheric ice sensitivity to sulfate geoengineering journal January 2018
Sulfur deposition changes under sulfate geoengineering conditions: quasi-biennial oscillation effects on the transport and lifetime of stratospheric aerosols journal January 2018
A radiative transfer module for calculating photolysis rates and solar heating in climate models: Solar-J v7.5 journal January 2017
Review of the global models used within phase 1 of the Chemistry–Climate Model Initiative (CCMI) journal January 2017
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design journal January 2018

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Related Subjects

58 GEOSCIENCES
climate
geoengineering model
model
stratospheric aerosol distribution