Major scientific study finds that the effect of Black Carbon on climate is much greater than previously believed.  Results show that Black Carbon is the second climate forcing agent with contribution 2/3 that of CO₂. The results have been recently published in JGR with the forcing estimated at +1.1 W/m².
The warming caused by the regional forcing will be particularly noticeable in the future at high latitudes in the northern hemisphere due to the deposition of Black Carbon on snow and ice.

The article is freely available at:

T. Bond et al., Bounding the role of black carbon in the climate system: A scientific assessment, JGR 2013, DOI: 10.1002/jgrd.50171
http://onlinelibrary.wiley.com/doi/10.1002/jgrd.50171/abstract  

The article has received substantial coverage:
http://www.economist.com/news/science-and-technology/21569686-soot-even-worse-climate-was-previously-thought-new-black
http://www.nytimes.com/2013/01/16/science/earth/burning-fuel-particles-do-more-damage-to-climate-than-thought-study-says.html?_r=0
http://www.washingtonpost.com/national/health-science/black-carbon-ranks-as-second-biggest-human-cause-of-global-warming/2013/01/15/6d4e542a-5f2d-11e2-9940-6fc488f3fecd_story.html
http://www.guardian.co.uk/environment/2013/jan/17/black-carbon-global-warming
http://www.chicagotribune.com/business/sns-rt-us-climate-black-carbonbre90e0xd-20130115,0,3561854.story
http://www.huffingtonpost.com/jake-schmidt/black-carbon-more-powerfu_b_2498323.html
http://www.unric.org/en/latest-un-buzz/28137-four-year-study-finds-black-carbon-second-biggest-climate-pollutant-behind-carbon-dioxide-
http://environmentalresearchweb.org/cws/article/yournews/52072
http://engineering.illinois.edu/news/2013/01/15/black-carbon-larger-cause-climate-change-previously-assessed
http://www.iiasa.ac.at/web/home/about/news/-Black-carbon-larger-cause-of-climate-change-than-pr.en.html
http://researchmatters.noaa.gov/news/Pages/soot.aspx

GreenLight WorldFlight is on the road again. After successfully completed Around the world flight last year, 91.000 km over all continents, all oceans, reaching top of the world, collected enormous amount of precious data about soot concentration in the atmosphere and because of excellent team, we decided for another adventure for science. This time we are flying far north, over the pole to Canada and back to Europe following Lindberg route over Atlantic. Arctic ice is indicator of global climate change, so Aerosol scientists will try to discover possible correlation between air pollution and ice melting.