Fig. 4: Chemical compositional and functional group distribution. | npj Climate and Atmospheric Science

Fig. 4: Chemical compositional and functional group distribution.

From: The significant contribution of biomass burning to methanol-soluble nitrogenous organics and its evolution during the highly-humid haze event in urban Wuhan

Fig. 4: Chemical compositional and functional group distribution.

a, b Mass distribution and species intensity fraction of each class. The chemical formulas of the most abundant substances are labeled in the diagram. CHN<180 Da refers to CHN with molecular weight less than 180 Da, while CHON>275 Da refers to CHON with molecular weight greater than 275 Da. c, d Functional group distribution of each class and fraction of three classes in ONs. ONs + /ONs- represents the nitrogenous organics detected in the positive/negative mode. POA-like, BBOA-like, and SOA-like refer to primary organic aerosol-like, biomass burning organic aerosol-like, and secondary organic aerosol-like, respectively.

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