Distribution of suspended particulate matter in the northern Bohai Bay in summer and its relation with thermocline |
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Authors: | L.L. Qiao Y.Z. Wang G.X. Li S.G. Deng Y. Liu L. Mu |
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Affiliation: | 1. Key Lab of Seafloor Science and Exploration Technology, Ocean University of China, 238 Songling Road, Qingdao 266100, PR China;2. College of Marine Geosciences, Ocean University of China, 238 Songling Road, Qingdao 266100, PR China;3. The First Institute of Oceanography, SOA, Qingdao 266061, PR China;4. National Marine Data and Information Service, Tianjin 300171, PR China |
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Abstract: | Field observations of suspended particulate matter (SPM) in the Bohai Bay, China have not been widely reported. The aim of this paper is to describe the horizontal and vertical distribution of mass and volume concentrations of SPM, respectively, based on observed data at 312 stations in the northern Bohai Bay during summer of 2006. A numerical model ECOMSED coupled with a sediment transport module was also established to further discuss the mechanism of the thermocline effect on the vertical distribution of SPM. The mass concentrations of SPM exhibited high inshore values and low offshore values in the horizontal distribution; while in the vertical direction, characteristics of the volume concentration of SPM can be divided into two types: one with a sharp peak at depth of 10–15 m and another without. The peak value at the depth of the thermocline was resulted from concentrated phytoplankton. A numerical experiment further displayed that the thermocline can also prevent particles from being resuspended upward. |
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Keywords: | suspended particulate matter thermocline numerical analysis distribution field observation Bohai Bay |
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