Figure 4

Seasonal average CO2 concentrations around the North America (Northern Hemisphere) driven by NCEP R2 horizontal wind from March 2014 to February 2015. (A) Spring (GOSAT (925 hPa)). (B) Spring (AIRS (500 hPa)). (C) Summer (GOSAT (925 hPa)). (D) Summer (AIRS (500 hPa)). (E) Autumn (GOSAT (925 hPa)). (F) Autumn (AIRS (500 hPa)). (G) Winter (GOSAT (925 hPa)). (H) Winter (AIRS (500 hPa)).