Estimation of direct radiative forcing due to non-methane hydrocarbons |
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| Institution: | 1. Laboratoire d''Optique Atmosphérique, CNRS/Université Lille, Villeneuve d''Ascq, France;2. State Environmental Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China;3. NASA Goddard Institute for Space Studies, New York, NY, USA;4. GRASP-SAS, Villeneuve d''Ascq, France;5. European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), Darmstadt, Germany;6. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA;7. University of Maryland, Baltimore County, Baltimore, USA;8. NASA Goddard Space Flight Center, Greenbelt, MD, USA;9. SRON Netherlands Institute for Space Research, Utrecht, The Netherlands;10. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China;11. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;12. Earth Science Division, Science Mission Directorate, NASA Headquarters, Washington, DC, USA;13. European Space Agency (ESA), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands;14. Taras Shevchenko National University of Kyiv, Kyiv, Ukraine;15. Kyoto College of Graduate Studies for Informatics, Kyoto, Japan;p. Faculty of Science and Engineering, Kindai University, Osaka, Japan;q. Royal Netherlands Meteorological Institute, De Bilt, The Netherlands;r. NASA Langley Research Center, Hampton, VA, USA;s. CNES–Direction de l''Innovation des Applications et de la Science (DIA), Toulouse, France;t. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China;u. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, China;1. Department of Geography, The University “Al. I. Cuza” of Iași, Romania;2. Department of Earth and Environmental Sciences, KU Leuven, Heverlee, Belgium;3. Faculty of Earth Sciences and Spatial Management, Maria-Curie Sklodowska University, Lublin, Poland;4. Faculty of Science and Engineering, The University of Wolverhampton, Wolverhampton WV10 OJP, UK |
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| Abstract: | The direct radiative forcing due to non-methane hydrocarbons (NMHCs) has not previously been quantified. We use new measurements of infrared absorption cross-sections and a narrow band radiative transfer model to estimate a forcing. An upper limit to the global mean anthropogenic forcing is likely to be in the region of 0.015 W m-2, less than 1% of the forcing due to other greenhouse gases. However, taking account of the natural NMHC loading and the vertical profile of these gases the actual radiative forcing is likely to be somewhat less than this. |
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