UNIVERSITY BREMEN / EUROPEAN SPACE AGENCY / SCIENCE PHOTO LIBRARY UNIVERSITY BREMEN / EUROPEAN SPACE AGENCY / SCIENCE PHOTO LIBRARY
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Maps showing the global distribution of atmospheric methane (CH4) from 2003-2004 (top) and 2010-2011 (bottom). Concentration, in parts per billion (ppb), is colour-coded, from purple (low), through blue and green to yellow and red (high). The scale changes for the two images, as in 2010-2011 average global methane is approximately 30 ppb higher than 2003-2004. High emission areas include wetlands in Siberia and the USA, rice fields in China, and coal and gas mining in the USA. Sciamachy instrument on ESA's Envisat satellite. TANSO-FTS (Infrared Fourier Transform Spectrometer) instrument on Japan's GOSAT (Greenhouse Gases Observing Satellite) satellite.
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