CO2 mole fraction
ppm
400
390
380
370
360
350
340
80N
60N
40N
20N
EQ
Latitude
20S
40S
60S
80S
1989 1991
1983 1985 1987
1999 2001 2003
1993 1995 1997
Year
340
2005 2007 2009
360
380
400
ppm
CO2 deseasonalized mole fraction
ppm
400
390
380
370
360
350
80N
60N
40N
20N
EQ
Latitude
20S
40S
60S
80S
1983 1985
1993 1995
1987 1989 1991
1997 1999 2001
2003 2005 2007
2009
Year
340
360
380
400 ppm
CO2 growth rate
ppm/yr
4
3
2
1
0
80N
60N
40N
20N
EQ
Latitude
20S
40S
60S
80S
1983
1991 1993
1985 1987 1989
1995 1997 1999
2001 2003 2005
Year
0.0
Plate 3.2
2007 2009
1.0
2.0
3.0
4.0 ppm/yr
Variation of zonally averaged monthly mean CO¾ mole fractions (top), deseasonalized long-term trends (middle),
and growth rates (bottom). The zonally averaged mole fractions are calculated for each ¾¼Æ zone. The deseasonalized trends
and growth rates are derived as described in Chapter 2.