HDO and SO2 thermal mapping on Venus: evidence for strong SO2 variability T. Encrenaz, T. K. Greathouse, H. Roe, M. Richter, J. Lacy, B. Bézard, T. Fouchet and T. Widemann A&A, 543 (2012) A153 Published online: 13 July 2012 DOI: 10.1051/0004-6361/201219419