Research Article

Weakening of hurricanes via marine cloud brightening (MCB)

  1. John Latham1,2,
  2. Ben Parkes3,
  3. Alan Gadian3,*,
  4. Stephen Salter4

Article first published online: 23 AUG 2012

DOI: 10.1002/asl.402

Issue

Atmospheric Science Letters

Atmospheric Science Letters

Volume 13, Issue 4, pages 231–237, October/December 2012

Additional Information

How to Cite

Latham, J., Parkes, B., Gadian, A. and Salter, S. (2012), Weakening of hurricanes via marine cloud brightening (MCB). Atmosph. Sci. Lett., 13: 231–237. doi: 10.1002/asl.402

Author Information

  1. 1

    MMM Division, National Center for Atmospheric Research, Boulder, CO, USA

  2. 2

    SEAS, University of Manchester, UK

  3. 3

    NCAS, SEE, University of Leeds, UK

  4. 4

    Department of Engineering, University of Edinburgh, UK

*A. Gadian, Department of Environment, Leeds University, Leeds LS2 9JT, UK.

Publication History

  1. Issue published online: 22 OCT 2012
  2. Article first published online: 23 AUG 2012
  3. Manuscript Revised: 10 JUL 2012
  4. Manuscript Accepted: 10 JUL 2012
  5. Manuscript Received: 24 JUN 2011

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Keywords:

  • hurricanes;
  • marine cloud brightening;
  • sea surface temperature;
  • cloud seeding;
  • global climate modelling

Abstract

This paper examines the potential to cool ocean surface waters in regions of hurricane genesis and early development. This would be achieved by seeding, with copious quantities of seawater cloud condensation nuclei (CCN), low-level maritime stratocumulus clouds covering these regions or those at the source of incoming currents. Higher cloud droplet density would increase these clouds' reflectivity to incoming sunlight, and possibly their longevity. This approach is therefore a more localized application of the marine cloud brightening (MCB) geoengineering technique promoting global cooling. By utilizing a climate ocean/atmosphere coupled model, HadGEM1, we demonstrate that—subject to the satisfactory resolution of defined but unresolved issues—judicious seeding of maritime stratocumulus clouds might significantly reduce sea surface temperatures (SSTs) in regions where hurricanes develop. Thus artificial seeding may reduce hurricane intensity; but how well the magnitude of this effect could be controlled is yet to be determined.

We also address the important question as to how MCB seeding may influence precipitation. GCM modelling indicates that the influence of seeding on undesirable rainfall reductions depends on its location and magnitude. Much more work on this topic is required. Copyright © 2012 Royal Meteorological Society

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