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The field burning of agriculture straw residue is a common method to dispose waste after harvesting seasons in China. The burning of agricultural crop residue in open field which has been given little attention up till now represents an important source of CO₂ for global warming concern. According to the CO₂ emission factors of rice, wheat, and corn straws based on laboratory measurements, the amount of CO₂ emission via agricultural crop residue open burning in China between 1996 and 2013 has been calculated. The diverse accounting methods and geographic information system (GIS) are used to map the CO₂ emission of thirty-one provinces. Identifying the spatial distribution, 5-year average variation, and contributions of CO₂ emission by three major agricultural residue open burning, it is found: (i) About 2707.34 Tg of CO₂ is emitted by agriculture residue open burning, occupies 45.09% of the total …