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The characteristic distributions of magneticsusceptibility (MS) are analyzed on the basis of susceptibilityof 172 surface sediment samples in the southern Yellow Sea(SYS). The preliminary results are as follows: first, the dis-tributions clearly correspond to different modern sedimentassemblages in the continental sea, which indicates differentsediment origins. With the 30μCGS isolinc being taken asdemarcation line, the study area can then be divided intosection H (high MS value area) and section L (low MS valuearea). Section H is mainly adjacent to land with two mainsources of the Changjiang River and the Huanghe River.Section L is mainly an eddy sediment area, where Yellow SeaCold Water is entrenched all the year round. The distribu-tion pattern of MS could tell apart strong or weak hydrody-namic conditions and has a close relation to the circulationsystem in this area. At the areas of the SYS Circumfluentand northern East China Sea (NECS) Circumfluent (weakhydrodynamic), the MS has low values, while in the areas ofCoastal Current (strong hydrodynamic). the values are high.At the same time, the oxidizing areas lend to take on higherMS, while the reducing areas have lower one. It seems safe tosay that the MS in the continental sea reflects more of thesediment origin and sedimentary environment, which is dif-ferent from that of loess, lake and surface soil as a climateproxy.
The characteristic distributions of magnetics susceptibility (MS) are analyzed on the basis of susceptibility of 172 surface sediment samples in the southern Yellow Sea (SYS). The preliminary results are as follows: first, the dis-tributions clearly correspond to different modern sedimentassemblages in the continental sea, which indicates different sediment origins. With the 30μCGS isolinc being taken asdemarcation line, the study area can then be divided intosection H (high MS value area) and section L (low MS valuearea). Section H is mainly adjacent to land with two mainsources of the Changjiang River and the Huanghe River. Section L is mainly an eddy sediment area, where Yellow SeaCold Water is entrenched all the year round. The distribu-tion pattern of MS could tell apart strong or weak hydrody-namic conditions and has a close relation to the circulationsystem in this area. At the areas of the SYS Circumfluent and northern East China Sea (NECS) Circumfluent (weakhydrodynamic), the MS has the values are high. At the same time, the oxidizing areas lend to take on higherMS, while the reducing areas have lower one. It seems safe tosay that the MS in the continental sea reflects more of thesediment origin and sedimentary environment, which is dif-ferent from that of loess, lake and surface soil as a climateproxy.