@article{Emmert_2012, title={Observations of increasing carbon dioxide concentration in Earth’s thermosphere}, volume={5}, ISSN={1752-0908}, url={http://dx.doi.org/10.1038/ngeo1626}, DOI={10.1038/ngeo1626}, number={12}, journal={Nature Geoscience}, publisher={Springer Science and Business Media LLC}, author={Emmert, J. T. and Stevens, M. H. and Bernath, P. F. and Drob, D. P. and Boone, C. D.}, year={2012}, month=nov, pages={868–871} }