Shipping emissions: Route optimisation using ocean currents and eddies may save 10% fuel use globally

An Australian scientist proposes freight and container ships optimise their routes based upon satellite data and a AI algorithm based upon the mapping of ocean currents and ocean eddies. 

This could save a freight route between Sydney and Wellington in New Zealand about 17 percent fuel use, with minimal deviation and change in delivery time. It could achieve these savings by tracking the flow of a large anticlockwise eddy in the Tasman Sea.

Projecting this globally: global shipping industry could potentially cut its total fuel usage by 10 per cent with his route optimisation algorithm, Estimated savings are projected to be nearly US$50 billion and 237 million tonnes of CO2 emissions every year.

Shane Keating is an oceanographer and associate professor of applied mathematics at UNSW Sydney. He has developed an application and is offering it through his just-launched UNSW spin-off company named Ocean Intelligence. 

“It’s essentially Google Maps for the sea, which offers the most efficient route in real time based on the behaviour of ocean eddies,” Keating said in this article in the Saturday Paper.

Shipping levy on maritime emissions opposed by Australia at IMO conference

Shipping, in transporting around 90% of world trade, creates about 1 billion tonnes of greenhouse gasses, or nearly 3 per cent of global carbon dioxide emissions. It is about the same amount as Germany or Japan. 

Pacific Island nations including Solomon Islands and Marshall Islands, proposed the introduction of a $100 per tonne levy on maritime emissions in order to make cleaner fuels cost-competitive with the dirtier heavy fuel oil that is the industry standard. 

But Australia appears to have joined Saudi Arabia, China, Russia, Brazil and other major states, to oppose this Pacific initiative for a levy on maritime emissions. Climate Home report identifies Latin American countries were also most vocal against the measure.

Fiji had proposed for the IMO, supported by a broad coalition of other Pacific nations, small island states and Least Developed countries:

• 37% GHG emissions reductions by 2030
• 96% by 2040 
• full decarbonization of shipping industry by 2050. 

A carbon levy and global fuel standards was also proposed as part of the basket of measures. 

Conference outcomes:

• failure to agree on absolute emission reduction targets for 2030 and 2040, 
• identified “indicative checkpoints” of at least 20%, striving for 30% emission reduction by 2030, 
• at least 70%, striving for 80% reduction by 2040. 
• aim to reach only net-zero “by or around, i.e., close to 2050”, depending on “national circumstances”.
• Green fuel mandates deferred.
• “pricing of greenhouse gas emissions” (a levy), deferred, earliest would be in 2027.

John Maggs, from the Clean Shipping Coalition, said:

 “There is no excuse for this wish and a prayer agreement. They knew what the science required, and that a 50% cut in emissions by 2030 was both possible and affordable. Instead the level of ambition agreed is far short of what is needed to be sure of keeping global heating below 1.5ºC and the language seemingly contrived to be vague and non-committal. The most vulnerable put up an admirable fight for high ambition and significantly improved the agreement but we are still a long way from the IMO treating the climate crisis with the urgency that it deserves and that the public demands.” Read more by Clean Shipping, 7 July, 2023, UN agrees on a new climate plan for global shipping, but not 1.5°C aligned.

Aviation and shipping emissions shamed by Fossil of the Day at #COP21

There are many intricacies to negotiating a climate agreement covering greenhouse gas emissions. One of the areas easy to overlook is aviation and shipping sector emissions.

Emissions from aviation and shipping are projected to grow, so it is important that they are considered in any climate agreement.

Aviation is responsible for almost 5 percent of all global warming and its emissions are predicted to grow by up to 300 per cent in 2050. Emissions from bunkers is also forecast to grow 270% by 2050. Such growth rates would make the target of keeping the global temperature increase to under 1.5 or 2°C almost impossible to achieve.

Yet international shipping and aircraft also enjoy tax free fuel subsidies to the tune over over 60 billion US dollars.