Comment on

• Net carbon dioxide losses of northern ecosystems in response to autumn warming.

  Piao S, Ciais P, Friedlingstein P, Peylin P, Reichstein M, Luyssaert S, Margolis H, Fang J, Barr A, Chen A, Grelle A, Hollinger DY, Laurila T, Lindroth A, Richardson AD, Vesala T. Piao S, et al. Nature. 2008 Jan 3;451(7174):49-52. doi: 10.1038/nature06444. Nature. 2008. PMID: 18172494