Atmospheric deposition of anthropogenic inorganic nitrogen in the East/Japan Sea

Atmospheric deposition of anthropogenic inorganic nitrogen in the East/Japan Sea
이선은; 박근하; 김태욱; 김영일
KIOST Author(s)
Publication Year
The atmospheric deposition of nitrogen has drawn attention due to its importance as a new source of nitrogen to the ocean. We assessed the impact of anthropogenic nitrogen on the East/Japan Sea by measuring the concentrations of nitrate (NO3-) and ammonium (NH4+) in airborne particles and in precipitation, along with the major water-soluble ions and metals, and analyzing transport routes of air mass and factors affecting the deposition over two years from March 2014 to February 2016 at a coastal site (37.08°N, 129.41°E) on the east coast of Korea. Dry deposition of NO3- (27-30 mmol N m-2 yr-1) was much more than that of NH4+ (6-8 mmol N m-2 yr-1). The greater rate of NO3- deposition was associated with air masses traveling over northeastern China and central Korea. In contrast, the rates of wet deposition of NO3- (17-24 mmol N m-2 yr-1) and NH4+ (14-27 mmol N m-2 yr-1) were comparable, probably associated with in-cloud scavenging of these ions. The potential impacts of atmospheric nitrogen deposition to the East Sea were estimated to be ~2.4% of net primary productivity and ~8% of the new production in the nearby East Sea region based on the estimated atmospheric deposition of the total dissolved nitrogen during the two consecutive years (~124 and ~89 mmol N m-2 yr-1, respectively). Our study shows that the atmospheric input of anthropogenic nitrogen species may substantially increase phytoplankton biomass in the c
Bibliographic Citation
2019 AGU Fall Meeting, 2019
American Geophysical Union
American Geophysical Union
Related Researcher
Research Interests

Distribution and Behavior of Radionuclides in the Ocean,Total Massflux of Singking Particle in East Sea,Material Transport Process in the Ocean

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