Global nitrous oxide emission from arable systems

For estimating global N2O emissions from arable fields, we use the 0.5 by 0.5 degree resolution global inventory of fertilizer-N use and manure management in arable systems for the year 2000 (Bouwman et al, 2006b; Beusen et al, 2008). This inventory is based on the land-cover data set described by Klein Goldewijk et al (2006), which includes agricultural areas for cropland and grassland that are consistent with statistical information from the Food and Agriculture Organization of the United Nations (FAO) (2008).

t 150

S 100

La Selva, fertilized

N20 observed M20 model fertilization

50 3

La Selva, unfertilized

N2Q observed - N20 model wfps model

íí í I í "t\ J* ÍTT ; i >íii"t, V

N2Q observed - N20 model wfps model

20 T

l_g Selva

■■ Precipita lion -Air temperature

■■ Precipita lion -Air temperature

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