@phdthesis{76421,
  author = {Adrian Simmons and P. Jones and da Bechtold and Anton Beljaars and P.W. Kållberg and S. Saarinen and S. Uppala and P. Viterbo and Nils Wedi},
  title = {Comparison of trends and low-frequency variability in CRU, ERA-40 and NCEP/NCAR analyses of surface air temperature},
  year = {2004},
  volume = {109},
  pages = {D24115},
  month = {2004},
  language = {eng},
}