Aerosol organic nitrogen over the remote Atlantic Ocean

作者：Lesworth Timothy; Baker Alex R; Jickells Timothy^*

来源：Atmospheric Environment, 2010, 44(15): 1887-1893.

DOI：10.1016/j.atmosenv.2010.02.021

• Organic nitrogen
• Size-segregated aerosols
• Nitrate
• Ammonium
• Atlantic Ocean

Water soluble organic nitrogen (WSON) has been measured in aerosols collected on three research cruises on the Atlantic Ocean from approximately 55 degrees N to 45 degrees S. Results are interpreted using air mass back trajectories and results for other aerosol components. WSON concentrations range from <1 to similar to 40 (median 5.6) nmol m(-3) with significant WSON concentrations in both fine (<1 mu m) and coarse mode (>1 mu m) aerosol. Concentrations of WSON were highest in samples containing Saharan dust, suggesting a locally significant source associated with soil dust. More generally WSON concentrations were highest in air which had recently crossed continental areas. In the whole data set. WSON is well correlated to total soluble nitrogen and represents approximately 25% of total nitrogen. This correlation implies a significant anthropogenic contribution to the organic nitrogen.

• 出版日期2010-5