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The Climate Penalty for Clean Fossil Fuel Combustion : Volume 11, Issue 9 (01/09/2011)

By Junkermann, W.

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Book Id: WPLBN0003995586
Format Type: PDF Article :
File Size: Pages 23
Reproduction Date: 2015

Title: The Climate Penalty for Clean Fossil Fuel Combustion : Volume 11, Issue 9 (01/09/2011)  
Author: Junkermann, W.
Volume: Vol. 11, Issue 9
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Junkermann, W., Sutton, M. A., & Vogel, B. (2011). The Climate Penalty for Clean Fossil Fuel Combustion : Volume 11, Issue 9 (01/09/2011). Retrieved from

Description: Karlsruhe Institute of Technology, IMK-IFU, Garmisch-Partenkirchen, Germany. To cope with the world's growing demand for energy, a large number of coal-fired power plants are currently in operation or under construction. To prevent environmental damage from acidic sulphur and particulate emissions, many such installations are equipped with flue gas cleaning technology that reduces the emitted amounts of sulphur dioxide (SO2) and nitrogen dioxide (NO2). However, the consequences of this technology for aerosol emissions, and in particular the regional scale impact on cloud microphysics, have not been studied until now. We performed airborne investigations to measure aerosol size distributions in the air masses downwind of coal-fired power installations. We show how the current generation of clean technology reduces the emission of sulphur and fine particulate matter, but leads to an unanticipated increase in the direct emission of ultrafine particles (1–10 nm median diameter) which are highly effective precursors of cloud condensation nuclei (CCN). Our analysis shows how these additional ultrafine particles modify cloud microphysics, as well as precipitation intensity and distribution on a regional scale downwind of emission sources. Effectively, the number of small water droplets is increased, thus reducing the water available for large droplets and rain formation. The corresponding changes in the precipitation budget with a shift from more frequent steady rain to occasionally more vigorous rain events, or even a significant regional reduction of annual precipitation, introduce an unanticipated risk for regional climate and agricultural production, especially in semi-arid climate zones.

The climate penalty for clean fossil fuel combustion

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