Publisher： John Wiley & Sons Inc
E-ISSN： 2156-2202|107|D23|ACH 2-1-ACH 2-11
ISSN： 0148-0227
Source： Journal Of Geophysical Research, Vol.107, Iss.D23, 2002-12, pp. : ACH 2-1-ACH 2-11
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
NO, NOy (total reactive nitrogen oxides), gaseous HNO3, and particulate nitrate (p‐NO3−) were measured at Neumayer Station from February 1999 to January 2000. In addition, during February 1999, the NOy component species peroxyacetyl nitrate (PAN) and methyl, ethyl, i‐propyl, and n‐propyl nitrates were determined. We found a mean NOy mixing ratio of 46 ± 29 pptv, with significantly higher values between February and end of May (58 ± 35 pptv). Between February and November, the (HNO3 + p‐NO3−)/NOy ratio was extremely low (around 0.22) and in contrast to NOy the seasonality of p‐NO3− and HNO3 showed a distinct maximum in November and December, leading to a (HNO3 + p‐NO3−)/NOy ratio of 0.66. Trajectory analyses and radioisotope measurements (7Be, 10Be, 210Pb, and 222Rn) indicated that the upper troposphere or stratosphere was the main source region of the observed NOy with a negligible contribution of ground‐level sources at northward continents. Frequent maxima of NOy mixing ratios up to 100 pptv are generally associated with air mass transport from the free troposphere of continental Antarctica, while air masses with the lowest NOy mixing ratios were typically advected from the marine boundary layer.
Related content
Access to resources
Recommend
Structure of the katabatic winds at Mizuho Station, East Antarctica
Journal Of Geophysical Research, Vol. 90, Iss. D6, 1985-10 ,pp. :
Annual variation of total ozone at Syowa Station, Antarctica
Journal Of Geophysical Research, Vol. 102, Iss. D1, 1997-01 ,pp. :
An extreme wind event at Casey Station, Antarctica
Journal Of Geophysical Research, Vol. 106, Iss. D7, 2001-04 ,pp. :
Reactive nitrogen compounds in the Arctic
Journal Of Geophysical Research, Vol. 90, Iss. D6, 1985-10 ,pp. :