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Surface Ocean and Lower Atmosphere Study¡ªAir-Sea interactions and their climatic and environmental impacts
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Nitric oxide (NO) in the Yellow Sea and the Bohai Sea
P-C4-06
Chun-Ying Liu* , Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education, Qingdao, 266100, China
Ye Tian, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
Chao Xue, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
Gui-Peng Yang, Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education, Qingdao, 266100, China
Pei-Feng Li, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
Wei-Hua Feng, Key Laboratory of Engineering Oceanography, Second Institute of Oceanography, SOA, Hangzhou, 310012, China
Hermann W. Bange, GEOMAR Helmholtz-Zentrum f¨¹r Ozeanforschung Kiel, Kiel, 24105, Germany
Presenter Email: roseliu@ouc.edu.cn |
| The distributions and photoproduction of NO were investigated in the Yellow Sea (YS) and the Bohai Sea (BS) in June 2011. NO concentrations ranged from below detection limit to 616 pmol L-1 in the surface water and below detection limit to 482 pmol L-1 in the bottom, with average values of 186 ± 108 and 174 ± 123 pmol L-1 respectively. The horizontal distribution of NO showed higher concentrations in the inshore waters and lower values in the offshore. The vertical distribution presented higher values in the surface and bottom waters. Dissolved nitrite and O2 concentrations had significant influence on spatial distributions of NO. The diurnal variation of NO was similar to those of light intensity and chlorophyll a. The average sea-to-air flux of NO was 4.5 ±3.6*10-16 mol cm-2 s-1 in the study area. The mean photoproduction rates of NO in the YS and the BS were 1.15*10-11 and 1.06*10-11 mol L-1 s-1, respectively. Based on a box model for the NO fluxes of the BS and YS in the mixed layer, the bulk of photoproduced NO was consumed in the box besides the loss of NO by air-sea exchange. |
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