『Abstract
Measurements of nitrogen dioxide, nitrous and nitric acids as
well as ozone were made using newly developed instrumentation
onboard the research vessel Aegeon in the Aegean Sea between
25th-29th July 2000. Typical nitrogen dioxide concentrations observed
aboard the boat were 4-6 ppb (v/v) with a broad maximum of 20-30
ppb (v/v). Ozone concentrations typically ranged between 40 and
80 ppb (v/v). Mixing ratios of both nitric and nitrous acids in
the ambient air of the Aegean Sea were mainly below 50 ppt (v/v).
The data also showed a number of short pollution episodes with
rapid changes in the concentration of reactive nitrogen compounds
[nitrogen dioxide maximum up to 164 ppb (v/v), nitric acid maximum
up to 12 ppb (v/v), nitrous acid maximum up to 2.7 ppb (v/v)]
and ozone [maximum up to 88 ppb (v/v)]. These episodes were correlated
with pollution plumes originating from boats upwind, at short
distance, from the R/V Aegeon. The measurements revealed
the importance of nitrous and nitric acids for the transport of
nitrogen to marine biota in busy ship lanes.
Keywords: Reactive nitrogen species; Ozone; Origin; Transport;
Eastern Mediterranean sea』
1. Introduction
2. Experimental section
3. Results and discussion
4. Conclusions
Acknowledgments
References