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Title: Response to marine cloud brightening in a multi-model ensemble

Abstract

In this paper we show results from Earth system model simulations from the marine cloud brightening experiment G4cdnc of the Geoengineering Model Intercomparison Project (GeoMIP). The nine contributing models prescribe a 50 % increase in the cloud droplet number concentration (CDNC) of low clouds over the global oceans in an experiment dubbed G4cdnc, with the purpose of counteracting the radiative forcing due to anthropogenic greenhouse gases under the RCP4.5 scenario. The model ensemble median effective radiative forcing (ERF) amounts to –1.9 Wm –2, with a substantial inter-model spread of –0.6 to –2.5 Wm –2. The large spread is partly related to the considerable differences in clouds and their representation between the models, with an underestimation of low clouds in several of the models. All models predict a statistically significant temperature decrease with a median of (for years 2020–2069) –0.96 [–0.17 to –1.21] K relative to the RCP4.5 scenario, with particularly strong cooling over low-latitude continents. Globally averaged there is a weak but significant precipitation decrease of –2.35 [–0.57 to –2.96]% due to a colder climate, but at low latitudes there is a 1.19 % increase over land. This increase is part of a circulation change where a strong negative top-of-atmospheremore » (TOA) shortwave forcing over subtropical oceans, caused by increased albedo associated with the increasing CDNC, is compensated for by rising motion and positive TOA longwave signals over adjacent land regions.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [5];  [6];  [7];  [7]; ORCiD logo [8];  [9];  [10];  [11]; ORCiD logo [12];  [11];  [13];  [2]
  1. CICERO Center for International Climate and Environmental Research Oslo, Oslo (Norway); Univ. of Oslo, Oslo (Norway)
  2. Univ. of Oslo, Oslo (Norway)
  3. Univ. of Oslo, Oslo (Norway); Stockholm Univ., Stockholm (Sweden)
  4. Stockholm Univ., Stockholm (Sweden)
  5. Canadian Centre for Climate Modelling and Analysis, Victoria (Canada)
  6. Beijing Normal University, Beijing (China)
  7. Met Office Hadley Centre, Exeter (United Kingdom)
  8. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  9. CSIRO Oceans and Atmosphere, Hobart (Australia)
  10. Beijing Normal University, Beijing (China); Joint Center for Global Change Studies, Beijing (China); Univ. of Lapland, Rovaniemi (Finland)
  11. Max Planck Institute for Meteorology, Hamburg (Germany)
  12. Univ. of Tasmania, Hobart (Australia)
  13. Japan Agency for Marine-Earth Science and Technology, Yokohama (Japan)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1418330
Report Number(s):
PNNL-SA-127576
Journal ID: ISSN 1680-7324
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Volume: 18; Journal Issue: 2; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Stjern, Camilla W., Muri, Helene, Ahlm, Lars, Boucher, Olivier, Cole, Jason N. S., Ji, Duoying, Jones, Andy, Haywood, Jim, Kravitz, Ben, Lenton, Andrew, Moore, John C., Niemeier, Ulrike, Phipps, Steven J., Schmidt, Hauke, Watanabe, Shingo, and Kristjansson, Jon Egill. Response to marine cloud brightening in a multi-model ensemble. United States: N. p., 2018. Web. doi:10.5194/acp-18-621-2018.
Stjern, Camilla W., Muri, Helene, Ahlm, Lars, Boucher, Olivier, Cole, Jason N. S., Ji, Duoying, Jones, Andy, Haywood, Jim, Kravitz, Ben, Lenton, Andrew, Moore, John C., Niemeier, Ulrike, Phipps, Steven J., Schmidt, Hauke, Watanabe, Shingo, & Kristjansson, Jon Egill. Response to marine cloud brightening in a multi-model ensemble. United States. https://doi.org/10.5194/acp-18-621-2018
Stjern, Camilla W., Muri, Helene, Ahlm, Lars, Boucher, Olivier, Cole, Jason N. S., Ji, Duoying, Jones, Andy, Haywood, Jim, Kravitz, Ben, Lenton, Andrew, Moore, John C., Niemeier, Ulrike, Phipps, Steven J., Schmidt, Hauke, Watanabe, Shingo, and Kristjansson, Jon Egill. Fri . "Response to marine cloud brightening in a multi-model ensemble". United States. https://doi.org/10.5194/acp-18-621-2018. https://www.osti.gov/servlets/purl/1418330.
@article{osti_1418330,
title = {Response to marine cloud brightening in a multi-model ensemble},
author = {Stjern, Camilla W. and Muri, Helene and Ahlm, Lars and Boucher, Olivier and Cole, Jason N. S. and Ji, Duoying and Jones, Andy and Haywood, Jim and Kravitz, Ben and Lenton, Andrew and Moore, John C. and Niemeier, Ulrike and Phipps, Steven J. and Schmidt, Hauke and Watanabe, Shingo and Kristjansson, Jon Egill},
abstractNote = {In this paper we show results from Earth system model simulations from the marine cloud brightening experiment G4cdnc of the Geoengineering Model Intercomparison Project (GeoMIP). The nine contributing models prescribe a 50 % increase in the cloud droplet number concentration (CDNC) of low clouds over the global oceans in an experiment dubbed G4cdnc, with the purpose of counteracting the radiative forcing due to anthropogenic greenhouse gases under the RCP4.5 scenario. The model ensemble median effective radiative forcing (ERF) amounts to –1.9 Wm–2, with a substantial inter-model spread of –0.6 to –2.5 Wm–2. The large spread is partly related to the considerable differences in clouds and their representation between the models, with an underestimation of low clouds in several of the models. All models predict a statistically significant temperature decrease with a median of (for years 2020–2069) –0.96 [–0.17 to –1.21] K relative to the RCP4.5 scenario, with particularly strong cooling over low-latitude continents. Globally averaged there is a weak but significant precipitation decrease of –2.35 [–0.57 to –2.96]% due to a colder climate, but at low latitudes there is a 1.19 % increase over land. This increase is part of a circulation change where a strong negative top-of-atmosphere (TOA) shortwave forcing over subtropical oceans, caused by increased albedo associated with the increasing CDNC, is compensated for by rising motion and positive TOA longwave signals over adjacent land regions.},
doi = {10.5194/acp-18-621-2018},
url = {https://www.osti.gov/biblio/1418330}, journal = {Atmospheric Chemistry and Physics (Online)},
issn = {1680-7324},
number = 2,
volume = 18,
place = {United States},
year = {2018},
month = {1}
}

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Works referenced in this record:

The RCP greenhouse gas concentrations and their extensions from 1765 to 2300
journal, August 2011


Transient climate carbon simulations of planetary geoengineering
journal, June 2007


On the precipitation susceptibility of clouds to aerosol perturbations
journal, January 2009


A new method for diagnosing radiative forcing and climate sensitivity
journal, January 2004


Process-model simulations of cloud albedo enhancement by aerosols in the Arctic
journal, December 2014

  • Kravitz, Ben; Wang, Hailong; Rasch, Philip J.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2031
  • https://doi.org/10.1098/rsta.2014.0052

Model intercomparison of indirect aerosol effects
journal, January 2006


Sea-salt injections into the low-latitude marine boundary layer: The transient response in three Earth system models: SEA-SALT CLIMATE ENGINEERING IN THREE ESMS
journal, November 2013


The ‘too few, too bright’ tropical low-cloud problem in CMIP5 models: TOO FEW TOO BRIGHT LOW-CLOUDS
journal, November 2012


An Overview of CMIP5 and the Experiment Design
journal, April 2012


Albedo enhancement of marine clouds to counteract global warming: impacts on the hydrological cycle
journal, June 2010


Control of global warming?
journal, September 1990


Time Variation of Effective Climate Sensitivity in GCMs
journal, October 2008


The sulfate-CCN-cloud albedo effect
journal, January 1995


Climate extremes in multi-model simulations of stratospheric aerosol and marine cloud brightening climate engineering
journal, January 2015


Constraining cloud droplet number concentration in GCMs suppresses the aerosol indirect effect
journal, January 2009


Tropical rainforest response to marine sky brightening climate engineering: Tropical forests under geoengineering
journal, April 2015


Occurrence of lower cloud albedo in ship tracks
journal, January 2012


On the role of the stratiform cloud scheme in the inter-model spread of cloud feedback: THE ROLE OF THE STRATIFORM CLOUD SCHEME
journal, February 2017


Atmospheric component of the MPI-M Earth System Model: ECHAM6: ECHAM6
journal, April 2013


Arctic cryosphere response in the Geoengineering Model Intercomparison Project G3 and G4 scenarios: ARCTIC RESPONSE TO G3 AND G4 IN GEOMIP
journal, February 2014


Indirect sulphate aerosol forcing in a climate model with an interactive sulphur cycle
journal, September 2001


Reduced efficacy of marine cloud brightening geoengineering due to in-plume aerosol coagulation: parameterization and global implications
journal, January 2013


The Canadian Fourth Generation Atmospheric Global Climate Model (CanAM4). Part I: Representation of Physical Processes
journal, February 2013


GPCC's new land surface precipitation climatology based on quality-controlled in situ data and its role in quantifying the global water cycle
journal, March 2013


Species richness changes lag behind climate change
journal, March 2006


Configuration and assessment of the GISS ModelE2 contributions to the CMIP5 archive: GISS MODEL-E2 CMIP5 SIMULATIONS
journal, March 2014


On the interpretation of inter-model spread in CMIP5 climate sensitivity estimates
journal, March 2013


Untangling aerosol effects on clouds and precipitation in a buffered system
journal, October 2009


A Comparison of Precipitation Forecast Skill between Small Convection-Allowing and Large Convection-Parameterizing Ensembles
journal, August 2009


Geoengineering by cloud seeding: influence on sea ice and climate system
journal, October 2009


Stratocumulus Clouds
journal, August 2012


Uncertainty analysis for estimates of the first indirect aerosol effect
journal, January 2005


Evaluation of cloud and water vapor simulations in CMIP5 climate models using NASA “A-Train” satellite observations: EVALUATION OF IPCC AR5 MODEL SIMULATIONS
journal, July 2012


Climate impacts of geoengineering marine stratocumulus clouds
journal, January 2009


Use of A-train satellite observations (CALIPSO–PARASOL) to evaluate tropical cloud properties in the LMDZ5 GCM
journal, November 2015


A parameterization of aerosol activation: 2. Multiple aerosol types
journal, March 2000


Marine cloud brightening – as effective without clouds
journal, January 2017


Factors determining the most efficient spray distribution for marine cloud brightening
journal, December 2014

  • Connolly, P. J.; McFiggans, G. B.; Wood, R.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2031
  • https://doi.org/10.1098/rsta.2014.0056

Description and basic evaluation of Beijing Normal University Earth System Model (BNU-ESM) version 1
journal, January 2014


Marine cloud brightening: regional applications
journal, December 2014

  • Latham, John; Gadian, Alan; Fournier, Jim
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2031
  • https://doi.org/10.1098/rsta.2014.0053

Sensitivity to deliberate sea salt seeding of marine clouds – observations and model simulations
journal, January 2012


Sea-spray geoengineering in the HadGEM2-ES earth-system model: radiative impact and climate response
journal, January 2012


Black carbon aerosols and the third polar ice cap
journal, January 2010


Running to stand still: adaptation and the response of plants to rapid climate change
journal, September 2005


Pollution and the planetary albedo
journal, December 1974


Assessment of Global Cloud Datasets from Satellites: Project and Database Initiated by the GEWEX Radiation Panel
journal, July 2013


Cloud overlap statistics
journal, January 1989


Direct and indirect effects of sea spray geoengineering and the role of injected particle size: SEA SPRAY GEOENGINEERING
journal, January 2012


The sulfate-CCN-cloud albedo effect.
journal, July 1995


Evaluation of cloud and water vapor simulations in CMIP5 climate models using NASA “A-Train” satellite observations: EVALUATION OF IPCC AR5 MODEL SIMULATIONS
journal, July 2012


    Works referencing / citing this record:

    The climate effects of increasing ocean albedo: an idealized representation of solar geoengineering
    journal, January 2018


    Climate engineering and the ocean: effects on biogeochemistry and primary production
    journal, January 2017


    Comparison of the Fast and Slow Climate Response to Three Radiation Management Geoengineering Schemes
    journal, November 2018


    Ocean Solutions to Address Climate Change and Its Effects on Marine Ecosystems
    journal, October 2018