TY - JOUR
T1 - Stable isotope ratio of atmospheric and seawater nitrate in the East Sea in the northwestern Pacific ocean
AU - Kim, Haryun
AU - Park, Geun Ha
AU - Lee, Seon Eun
AU - Kim, Young il
AU - Lee, Kitack
AU - Kim, Yeo Hun
AU - Kim, Tae Wook
PY - 2019/12
Y1 - 2019/12
N2 - The nitrogen and oxygen isotopic values of anthropogenic NOx− (including NO2− and NO3−) are preserved in precipitation and airborne total suspended particles. Hence, isotope analyses of these atmospheric samples allow for the identification of the NOx− sources. In this study, atmospheric δ15N- and δ18O-NOx− values were measured in an eastern coastal site of South Korea over a three-year period, and compared with seawater values observed from coastal waters of the East Sea. The highest seasonal atmospheric δ15N-NOx− values were associated with wintertime air masses blowing from northeastern China, and similar to those produced by coal and biomass burning. By contrast, the lowest atmospheric δ15N-NOx− values were observed in summer, and the major source appeared to be vehicle exhaust. In addition, the reductions in the seawater δ15N-NOx− and Δ(15−18) (i.e., δ15N-NOx− minus δ18O-NOx−) values in the East Sea could be at least partially attributed to atmospheric deposition.
AB - The nitrogen and oxygen isotopic values of anthropogenic NOx− (including NO2− and NO3−) are preserved in precipitation and airborne total suspended particles. Hence, isotope analyses of these atmospheric samples allow for the identification of the NOx− sources. In this study, atmospheric δ15N- and δ18O-NOx− values were measured in an eastern coastal site of South Korea over a three-year period, and compared with seawater values observed from coastal waters of the East Sea. The highest seasonal atmospheric δ15N-NOx− values were associated with wintertime air masses blowing from northeastern China, and similar to those produced by coal and biomass burning. By contrast, the lowest atmospheric δ15N-NOx− values were observed in summer, and the major source appeared to be vehicle exhaust. In addition, the reductions in the seawater δ15N-NOx− and Δ(15−18) (i.e., δ15N-NOx− minus δ18O-NOx−) values in the East Sea could be at least partially attributed to atmospheric deposition.
KW - Anthropogenic nitrogen
KW - Atmospheric pollution
KW - East Asia
KW - Marginal sea
KW - Nitrogen and oxygen isotope
KW - Ocean nitrogen cycle
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U2 - 10.1016/j.marpolbul.2019.110610
DO - 10.1016/j.marpolbul.2019.110610
M3 - Article
AN - SCOPUS:85074122774
SN - 0025-326X
VL - 149
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
M1 - 110610
ER -