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Atmospheric mercury speciation and air-sea mercury flux in the marine boundary layer during the SHIPPO cruise in 2012

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Title
Atmospheric mercury speciation and air-sea mercury flux in the marine boundary layer during the SHIPPO cruise in 2012
Other Titles
Atmospheric mercury speciation and air-sea mercury flux in the marine boundary layer during the SHIPPO cruise in 2012
Authors
Rhee, Tae Siek
Moklesur Rahman
Han, Seunghee
Kim, Hyun-Jee
Keywords
flux; mercury
Issue Date
2012
Citation
Rhee, Tae Siek, et al. 2012. Atmospheric mercury speciation and air-sea mercury flux in the marine boundary layer during the SHIPPO cruise in 2012. 대기환경학회. 대기환경학회. 2012.11.27~.
Abstract
Different species of atmospheric mercury (gaseous elemental mercury, GEM; reactive gaseous mercury, RGM; and particle bound mercury, PBM) and relevant trace gases in the marine boundary layer have been measured in situ onboard the Korean icebreaker R/V Araon during the SHIPPO (SHIpborne Pole-to-Pole Observations) campaign. The campaign started from Incheon on July 14, 2012, lasted for two weeks, though yet continuing over the Arctic Ocean thereafter. The concentration of GEM during the cruise from Busan to Nome, Alaska, ranged between 1.1 and 2.9 with mean of ~1.5 ng/m3. The ranges of RGM and PBM, on the contrary, were 0 – 41 pg/m3 and 0 - 11 pg/m3with an average of ~1.7 pg/m3 and ~1.6 pg/m3,respectively. Fairly constant level of RGM is an indicative of minor photochemical production though some diurnal variation of GEM have been revealed during the campaign. The concentration of all the three different species tended to decrease as she sailed far from the coast likely due to having less influence by the mercury loaded continental air. The concentration of GEM gradually increased when the air mass coming from the East Asian continent and Japanese Islands. A highly dynamic mercury flux varying between ~10 and ~200 ng m-2day-1calculated based on the concentration gradient of total gaseous mercury between the surface water and the overlying atmosphere and wind speed shows that along then icebreaker R/V Araon during the SHIPPO (SHIpborne Pole-to-Pole Observations) campaign. The campaign started from Incheon on July 14, 2012, lasted for two weeks, though yet continuing over the Arctic Ocean thereafter. The concentration of GEM during the cruise from Busan to Nome, Alaska, ranged between 1.1 and 2.9 with mean of ~1.5 ng/m3. The ranges of RGM and PBM, on the contrary, were 0 – 41 pg/m3 and 0 - 11 pg/m3with an average of ~1.7 pg/m3 and ~1.6 pg/m3,respectively. Fairly constant level of RGM is an indicative of minor photoche
URI
http://repository.kopri.re.kr/handle/201206/8374
Conference Name
대기환경학회
Conference Place
대기환경학회
Conference Date
2012.11.27~
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