Table 2.93: TABLE 39Atmospheric carbon dioxide at Mauna Loa, October 2012 to September 2013
Month
Carbon dioxide (ppm)
Month
Carbon dioxide (ppm)
Oct.
391.01
Apr.
398.35
Nov.
392.81
May
399.76
Dec.
394.28
June
398.58
Jan.
395.54
July
397.20
Feb.
396.80
Aug.
395.15
Mar.
397.31
Sept.
393.51
Table 2.93: Source: Dr. Pieter Tans, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, www.esrl.noaa.gov/gmd/ccgg/trends.