TECH TALK
or hybrid as well. Newer cruise and cargo ships are also cleaning up their act as well, utilizing more efficient electrical propulsion systems. While maritime has a smaller
share of the world travel market, it should be noted that, according to
the United Nations, approximately 90% of world trade is transported via water. While it is difficult to provide any type of useful comparisons between aviation and maritime, each is estimated to be responsible for roughly comparable figures of ~2%
global greenhouse gas emissions, with aviation having a ~22% share and maritime having ~17% by 2050, according to a report from Europe entitled ‘Emission Reduction Targets for Aviation and Shipping’ in 2015. Some of these estimates are slightly different than from other sources, but since each does not completely disclose the exact subsectors included (specifically, are figures for aviation including only commercial transport, or are business / general aviation included, jet turbine aircraft only, etc.), which can explain some of the differences in percentages of emissions. Another critical point worth from
this report worth mentioning is that both aviation and maritime shipping produce short-lived emissions of NOx and SO2, which lead to cloud formation, the impacts of which are estimated to be two to five times higher than CO2 emissions from aviation alone. The report identifies that NOx and SO2 emissions have an indirect warming and (a much smaller) cooling effect on global warming as they produce or destroy GHGs (mainly ozone, methane and sulphate aerosols). It mentions that alternative fuels are partial solution but will not completely solve either industry’s emissions issues. This report can be found at
https://www.europarl.
europa.eu/RegData/etudes/ STUD/2015/569964/IPOL_ STU(2015)569964_EN.pdf
AVIATION HAS HAD GREAT
PROGRESS IN RECENT YEARS The question is not should we minimize or even stop most air travel, as some of the boycotts happening as of late are striving for, but, what more can this industry do to address these issues.
Rapco 1-2 page Fuel
twin.indd 1
16
DOMmagazine.com | dec 2019 jan 2020
7/22/19 3:35 PM
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68
