@misc{80507,
  author = {Richard Engelen},
  title = {CO2 from space: estimating atmospheric CO2 within the ECMWF data assimilation system},
  year = {2005},
  journal = {ECMWF newsletter},
  chapter = {Meteorology},
  pages = {14-18},
  month = {2005},
  url = {https://www.ecmwf.int/node/18105},
  doi = {10.21957/104re762ma},
  language = {eng},
}