历年二氧化碳浓度数据.29页.doc

1 Pieler T.Trends in atmospheric carbon dioxide-Global. http:/www. esrl. noaa. gov/gmd/ccgg/trends/ . 2009 2 Etheridge D M,Steele L P, el al.Historical CO2record derived from a spline fit （20 year cutoff） of the Law Dome DE08 and DE08-2 ice cores. http:/cdiac. ornl. gov/ftp/trends/co2/lawdome. smoothed. yr20 . 1998 # -# USE OF NOAA ESRL DATA# # These data are made freely available to the public and the# scie