Double duty geoengineering and weather modification boats that spray oceanic salt water into clouds (marine strato-cumulus) to make them reflect sunlight (albedo modification, solar radiation management) and weaken or steer hurricanes:
The Marine Cloud Brightening Project is an open, international collaboration of atmospheric scientists and other experts to advance understanding of cloud responses to aerosol particles – a critical part of understanding the climate, and a critical area in which human activities are thought to cause significant effects.
We seek to advance scientific understanding in this area by developing a framework and associated technology that will allow the scientific community to conduct experiments to understand cloud processes with a much greater degree of control than has previously been possible.
To do this we propose to:
- Develop new models and improve existing models of aerosol-cloud interactions needed for accurate modeling of climate and climate change.
- Use advanced techniques such as machine learning to analyze cloud-aerosol data to test and inform models.
- Develop spray technology that will generate controlled volumes and sizes of tiny sub-micrometer seawater particles in sufficient numbers to increase the local brightness of low clouds in a marine environment.
- Conduct small-scale, controlled field experiments with to provide new understanding of the interactions between aerosols and clouds. 
This research is currently undertaken by distinguished scientists and engineers at: Manchester University, Leeds University, NCAR, Pacific Northwest National Labs, Purdue University, University of Washington and the University of Edinburgh. 
“cool ocean surface waters in the regions in which the genesis of hurricanes occurs. This would be achieved by seeding low-level maritime stratocumulus clouds covering these regions – or ones from which ocean currents flow into these regions – in order to increase their reflectivity for incoming sunlight: thus producing a cooling.” 
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