World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Reduced Efficacy of Marine Cloud Brightening Geoengineering Due to In-plume Aerosol Coagulation: Parameterization and Global Implications : Volume 13, Issue 7 (12/07/2013)

By Stuart, G. S.

Click here to view

Book Id: WPLBN0003992757
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Reduced Efficacy of Marine Cloud Brightening Geoengineering Due to In-plume Aerosol Coagulation: Parameterization and Global Implications : Volume 13, Issue 7 (12/07/2013)  
Author: Stuart, G. S.
Volume: Vol. 13, Issue 7
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Partanen, A., Forster, P. M., L. Jenkin, A. K., Stevens, R. G., Korhonen, H., Stuart, G. S.,...Pierce, J. R. (2013). Reduced Efficacy of Marine Cloud Brightening Geoengineering Due to In-plume Aerosol Coagulation: Parameterization and Global Implications : Volume 13, Issue 7 (12/07/2013). Retrieved from http://ebooklibrary.org/


Description
Description: Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada. The intentional enhancement of cloud albedo via controlled sea-spray injection from ships (Marine Cloud Brightening) has been proposed as a possible method to control anthropogenic global warming; however, there remains significant uncertainty in the efficacy of this method due to, amongst other factors, uncertainties in aerosol and cloud microphysics. A major assumption used in recent cloud- and climate-modeling studies is that all sea spray was emitted uniformly into some oceanic grid boxes, and thus these studies did not account for sub-grid aerosol coagulation within the sea-spray plumes. We explore the evolution of these sea-salt plumes using a multi-shelled Gaussian plume model with size-resolved aerosol coagulation. We determine how the final number of particles depends on meteorological conditions, including wind speed and boundary-layer stability, as well as the emission rate and size distribution of aerosol emitted. Under previously proposed injection rates and typical marine conditions, we find that the number of aerosol particles is reduced by over 50%, but this reduction varies from under 10% to over 90% depending on the conditions. We provide a computationally efficient parameterization for cloud-resolving and global-scale models to account for sub-grid scale coagulation, and we implement this parameterization in a global-scale aerosol-climate model. We find that accounting for this sub-grid scale coagulation reduces cloud droplet number concentrations by 46% over emission regions, and reduces the global mean radiative flux perturbation from −1.5 W m-2 to −0.8 W m-2.

Summary
Reduced efficacy of marine cloud brightening geoengineering due to in-plume aerosol coagulation: parameterization and global implications

Excerpt
Abdul-Razzak, H. and Ghan, S. J.: A parameterization of aerosol activation: 2. multiple aerosol types, J. Geophys. Res., 105, 6837–6844, doi:10.1029/1999JD901161, 2000.; Albrecht, B.: Aerosols, cloud microphysics, and fractional cloudiness, Science, 245, 1227–1230, 1989.; Alterskjær, K. and Kristjánsson, J. E.: The sign of the radiative forcing from marine cloud brightening depends on both particle size and injection amount, Geophys. Res. Lett., 40, 210–215, doi:10.1029/2012gl054286, 2013.; Alterskjær, K., Kristjánsson, J. E., and Seland, Ø.: Sensitivity to deliberate sea salt seeding of marine clouds – observations and model simulations, Atmos. Chem. Phys., 12, 2795–2807, doi:10.5194/acp-12-2795-2012, 2012.; Bala, G., Caldeira, K., Nemani, R., Cao, L., Ban-Weiss, G., and Shin, H.-J.: Albedo enhancement of marine clouds to counteract global warming: impacts on the hydrological cycle, Clim. Dynam., 37, 915–931, doi:10.1007/s00382-010-0868-1, 2011.; Bower, K., Choularton, T., Latham, J., Sahraei, J., and Salter, S.: Computational assessment of a proposed technique for global warming mitigation via albedo-enhancement of marine stratocumulus clouds, Atmos. Res., 82, 328–336, doi:10.1006/Asle.2002.0048, 2006.; Dentener, F., Kinne, S., Bond, T., Boucher, O., Cofala, J., Generoso, S., Ginoux, P., Gong, S., Hoelzemann, J. J., Ito, A., Marelli, L., Penner, J. E., Putaud, J.-P., Textor, C., Schulz, M., van der Werf, G. R., and Wilson, J.: Emissions of primary aerosol and precursor gases in the years 2000 and 1750 prescribed data-sets for AeroCom, Atmos. Chem. Phys., 6, 4321–4344, doi:10.5194/acp-6-4321-2006, 2006.; Fast, J. D., Gustafson Jr., W. I., Easter, R. C., Zaveri, R. A., Barnard, J. C., Chapman, E. G., Grell, G. A., and Peckham, S. E.: Evolution of ozone, particulates, and aerosol direct radiative forcing in the vicinity of Houston using a fully coupled meteorology-chemistry-aerosol model, J. Geophys. Res., 111, D21305, doi:10.1029/2005jd006721, 2006.; Forster, P., Ramaswamy, V., Artaxo, P., Berntsen, T., Betts, R., Fahey, D. W., Haywood, J., Lean, J., Lowe, D. C., Myhre, G., Nganga, J., Prinn, R., Raga, G., Schulz, M., and Dorland, R. V.: Changes in atmospheric constituents and in radiative forcing, in: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Miller, H. L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 129–234, 2007.; Fuchs, N. A.: Mechanics of Aerosols, Pergamon, New York, 1964.; Haywood, J., Donner, L., Jones, A., and Golaz, J.-C.: Global indirect radiative forcing caused by aerosols: IPCC (2007) and beyond, in: Clouds in the Perturbed Climate System: Their Relationship to Energy Balance, Atmospheric Dynamics, and Precipitation, edited by: Heintzenberg, J. and Charlson, R. J., Strüngmann Forum Report, MIT Press, Cambridge, 451–467, 2009.; Heintzenberg, J., Covert, D. C., and Van Dingenen, R.: Size distribution and chemical composition of marine aerosols: a compilation and review, Tellus B, 52, 1104–1122, doi:10.3402/tellusb.v52i4.17090, 2000.; Hudischewskyj, A. B. and Seigneur, C.: Mathematical modeling of the chemistry and physics of aerosols in plumes, Environ. Sci. Technol., 23, 413–421, doi:10.1021/es00181a005, 1989.; Jenkins, A. K. L. and Forster, P. M.: The inclusion of water with the inject

 

Click To View

Additional Books


  • Technical Note: Analytical Estimation of... (by )
  • Efficiency of the Deposition Mode Ice Nu... (by )
  • Changes in Atmospheric Aerosol Loading R... (by )
  • A Numerical Modelling Study on Regional ... (by )
  • Contribution of Very Short-lived Organic... (by )
  • One Year of Raman Lidar Observations of ... (by )
  • Prediction of Gas/Particle Partitioning ... (by )
  • Changes of Daily Surface Ozone Maxima in... (by )
  • Statistical Diagnostic and Correction of... (by )
  • Recent Satellite-based Trends of Troposp... (by )
  • Time-dependent Freezing Rate Parcel Mode... (by )
  • Constraints on Methane Emissions in Nort... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.