| Seasonal and annual variations of marine sinking particulate flux during 1993~1996 in the central South China Sea |
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| 作者姓名： | CHEN Ronghu WIESNER M G ZHENG Yulong CHENG Xinrong JIN Haiyan ZHAO Qingying ZHENG Lianfu |
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| 作者单位： | Institute of |
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| 摘 要： | A total of 67 samples from the upper and lower sediment traps in the central South China Sea were analyzed, which were collected during 1993~1996. It is indicated that the distribution of stable isotope values, surface primary productivity, fluxes of total particulate matter, carbonate, biogenic opal, organic carbon, planktonic foraminiferal species and their total amount exhibit obviously seasonal and annual fluctuations. High values of the fluxes occurred in the prevailing periods of the northeastern and southwestern monsoons, and the low values occurred during the periods between the two monsoons. The fluxes of some planktonic foraminiferal species (Globigerinoides sacculifer, G. ruber, Globigerinita glutinata, Neogloboquadrina dutertrei) and their percentages also exhibit two prominent peaks during the prevailing periods of the northeastern and southwestern monsoons respectively, while those of Globigerina bulloides, Globorotalia menardii and Pulleniatina obliquiloculata only exhibit one peak in the prevailing periods of the northeastern monsoon. In addition, fluxes and percentages of Globigerinoides sacculifer and Globorotalia menardii as well as the fluxes of carbonate and total amount of planktonic foraminifera decrease gradually from 1993 to 1996, and those of Globigerina bulloides, Globigerinita glutinata and biogenic opal increase gradually from 1993 to 1996. The fluxes of carbonate and organic carbon in the upper trap are higher than those in the lower one. The study indicates that the seasonal and annual variations of the sediment fluxes and planktonic foraminiferal species are mainly controlled by the changes of surface primary productivity and hydrological conditions related to the East Asian monsoon. The lower carbonate and organic carbon fluxes in the lower trap are related to the dissolution.
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| 关 键 词： | 季风 季节 海洋 同位素 |
| 收稿时间： | 2006/5/30 0:00:00 |
| 修稿时间： | 2006-05-302006-09-07 |
Seasonal and annual variations of marine sinking particulate flux during 1993~1996 in the central South China Sea |
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| CHEN Ronghu,WIESNER M G,ZHENG Yulong,CHENG Xinrong,JIN Haiyan,ZHAO Qingying,ZHENG Lianfu.Seasonal and annual variations of marine sinking particulate flux during 1993~1996 in the central South China Sea[J].Acta Oceanologica Sinica,2007,26(3):33-43. |
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| Authors: | CHEN Ronghu WIESNER M G ZHENG Yulong CHENG Xinrong JIN Haiyan ZHAO Qingying and ZHENG Lianfu |
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| Institution: | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geoscience of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Institute of Biogeochemistry and Marine Chemistry,University of Hamburg, Hamburg D-20146, Germany;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geoscience of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geoscience of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geoscience of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China |
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| Abstract: | A total of 67 samples from the upper and lower sediment traps in the central South China Sea were analyzed, which were collected during 1993~1996. It is indicated that the distribution of stable isotope values, surface primary productivity, fluxes of total particulate matter, carbonate, biogenic opal, organic carbon, planktonic foraminiferal species and their total amount exhibit obviously seasonal and annual fluctuations. High values of the fluxes occurred in the prevailing periods of the northeastern and southwestern monsoons, and the low values occurred during the periods between the two monsoons. The fluxes of some planktonic foraminiferal species (Globigerinoides sacculifer, G. ruber, Globigerinita glutinata, Neogloboquadrina dutertrei) and their percentages also exhibit two prominent peaks during the prevailing periods of the northeastern and southwestern monsoons respectively, while those of Globigerina bulloides, Globorotalia menardii and Pulleniatina obliquiloculata only exhibit one peak in the prevailing periods of the northeastern monsoon. In addition, fluxes and percentages of Globigerinoides sacculifer and Globorotalia menardii as well as the fluxes of carbonate and total amount of planktonic foraminifera decrease gradually from 1993 to 1996, and those of Globigerina bulloides, Globigerinita glutinata and biogenic opal increase gradually from 1993 to 1996. The fluxes of carbonate and organic carbon in the upper trap are higher than those in the lower one. The study indicates that the seasonal and annual variations of the sediment fluxes and planktonic foraminiferal species are mainly controlled by the changes of surface primary productivity and hydrological conditions related to the East Asian monsoon. The lower carbonate and organic carbon fluxes in the lower trap are related to the dissolution. |
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| Keywords: | flux monsoon seasonal and annual variation stable isotope central South China Sea |
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