Black Carbon's Climate Impacts and its Emission Characteristics from the Marine Diesel Engines
- Black Carbon's Climate Impacts and its Emission Characteristics from the Marine Diesel Engines
- Black Carbon; Radiation Forcing; Carbon Morphology; HR-TEM; Raman Spectroscopy
- Issue Date
- SPEIC14: Towards Sustainable Combustion
- Black carbon (BC) is a part of soot, which is in turn the carbonaceous part of particulate matters (PM). BC is not a pure substance, but is a kind of black-body-like soot of typically less than 100nm size with a multiple layer of graphitic molecular structure usually formed by a high temperature soot formation mechanism called HACA (hydrogen abstraction carbon addition). PM/Soot/BC have been considered for various environmental and climate regulations (regional or global) because of their attributions to health risk, surface albedo decrease causing accelerated snow/ice melting in the Arctic, and solar radiation absorption contributing to the atmospheric warming.
Among these impacts, the BC impact became a center of climate controversy ever since the results from the Scripps Institution of Oceanography is published that BC is the 2nd strongest warming agent only next to CO2 because the ambient air heating by BC’s solar radiation absorption significantly exceeds the atmospheric cooling by BC’s aerosol formation to reflect sunlight. However, the SIO results are criticized for potential overestimation of BC emission inventory and BC radiation emissivity. Moreover, BC’s warming effect is not accumulative and BC cannot be
selectively controlled in any PM control units. Therefore, regulating BC as a short-lived climate forcer is seen to be counter-productive at this moment, and international communities, except USA and Canada, are rather looking into regulating soot emission in the arctic region which may be linked to the arctic warming phenomenon that is seen as an outstanding example of enhanced climate variability, thus calling for immediate international coordination to mitigate the Arctic climate change. Currently, IMO (international maritime organization) is discussing how to regulate PM/Soot/BC emission in the international shipping, particularly in the arctic region. In order to aid the Korean ship-building...
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