Working Group on reduction of greenhouse gas (GHG) from shipping had its first
online meeting this week to advance the work on short term measures in support
of the International Maritime Organization’s (IMO) initial strategy on
reduction of GHG from ships.
CII rating mechanism lack important details such as: how should carbon
efficiency be measured…
A proposal had
been made to the meeting by a large group of member states in an attempt to
fuse the technical Energy Efficiency Existing Ship Index (EEXI) measure with
the operational Carbon Intensity Indicator (CII) measure. These are in reality
Energy Efficiency Design Index (EEDI) limits to existing ships and a rating
mechanism to mandate improvements to the operational carbon efficiency of
ships. While the EEXI reduction rates are established and listed in the draft
MARPOL amendments to be discussed at next month’s Marine Environment Protection
Committee (MEPC) meeting, the CII rating mechanism still lack important details
such as: how should carbon efficiency be measured, and which reduction factors
should be used to calculate annual limits for CII for each ship?
guidelines also still need to be agreed before we can assess the impact of the
proposed regulation on the fleet.
Some countries and
organisations have expressed that the outcome of this week’s deliberations fail
to meet the ambitions of the IMO initial strategy and the Paris Agreement. To
this we can only say: we don’t know. Because important elements are still
missing, it is impossible to judge the effect.
Lower total emissions from the fleet-- depends on the metric chosen
and resulting change in operational behaviour of ships
The IMO initial
strategy’s ambition to improve carbon efficiency of the fleet by 40% by 2030
compared to 2008 is silent on how carbon efficiency shall be measured. Thus the
2030 ambition may, or may not, result in lower total emissions from the fleet –
it all depends on the metric chosen and resulting change in operational
behaviour of ships.
The litmus test of
any measure must be to evaluate its ability to reduce total emissions. The
initial strategy’s 2050 ambition to reduce total emissions by 50% compared to
2008 is the important milestone in shipping’s quest to decarbonise.