Table 1 Summary of individual ON source factors’ contribution to bulk aerosol ON and ON/OC ratios for sources contributing more than 5% ON.

From: Molecular and elemental markers-based source apportionment of organic nitrogen in PM2.5 at a suburban site in Hong Kong

 

Dust

Ship emission

Biomass burning

Sea salt

Primary biological

Sulfate-rich

SOA-1 (α-Pinene SOA)

SOA-3 (β-CA SOA)

ON contributions

11.7%

6.25%

11.3%

9.21%

7.84%

22.0%

11.7%

6.44%

ON/OC ratio

0.085

0.0557

0.0472

0.0771

0.0565

0.0814

0.0565

0.0848

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