| The chemical distribution characteristics of variant form phosphorus in the seawater of the South China Sea |
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| 作者姓名： | Jianming Pan Chuanyu Hu Jianfang Chen Xiaoya Liu Huaiyang Zhou Weidong Ji |
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| 作者单位： | Jianming Pan，Chuanyu Hu，Jianfang Chen，Xiaoya Liu，Huaiyang Zhou，Weidong Ji Key Laboratory of Submarine Geosciences of State Oceanic Administration，Second Institute of Oceanography，State O-ceanic Administration，Hangzhou 310012，China. E-mail:panjianming@sio. zj.edu. cn
Third Institute of Oceanography，State Oceanic Administration，Xiamen 361005，China |
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| 基金项目： | National Basic Research Priorities Programme of China under contract No.G2000078500. |
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| 摘 要： | According to two cruises investigation information in summer and winter during 1998 and1999, the phosphorous concentration distribution and changes of summer and winter were discussed pri-marily in the South China Sea. The results show that the phosphate concentration of surface seawater insummer is distinctly lower than that in winter, averaging 0.04 μmol/dm3 in summer and 0.35 μmol/dm3 in winter. The organic phosphorous concentration of surface seawater in summer is higher than thatin winter, averaging 0.12μmol/dm3 in summer and 0.04 μmol/dm3 in winter respectively. The season-al changes of total phosphorus are similar to phosphate, averaging 0.22 μmol/dm3 in summer and 0.61μmol/dm3 in winter respectively. In vertical direction, phosphate, TDP and TP content are the lowestin upper 50 m water column, and increase in linearity rapidly with water depth, increasing slowly under500 m, reach to maximum about 1 000 m, then decrease slightly with water depth increasing. The ver-tical distribution is typical in summer, and there is small dispersed for phosphorus concentration for thesame depth of different stations. However, in winter there is a large disperse for phosphate, TDP andTP, specifically for phosphate at 200 m at which the concentration is maximum. This result indicatesthat there are large differences in hydrology and biology conditions that affect largely the chemical envi-ronment of the South China Sea. The organic phosphorus is the predominant in surface seawater of theSouth China Sea, but the inorganic phosphorus is the predominant in layers below depth of 150 m. Theorganic phosphorus concentration in deep water usually decreases with water depth increasing. The or-ganic phosphorus in summer is remarkably more than that in winter because of the strong biology activi-ties in summer.
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| 关 键 词： | the South China Sea specific form phosphorus biogeochemistry processes |
| 收稿时间： | 2002/11/18 0:00:00 |
| 修稿时间： | 4/1/2003 12:00:00 AM |
The chemical distribution characteristics of variant form phosphorus in the seawater of the South China Sea |
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| Jianming Pan,Chuanyu Hu,Jianfang Chen,Xiaoya Liu,Huaiyang Zhou,Weidong Ji.The chemical distribution characteristics of variant form phosphorus in the seawater of the South China Sea[J].Acta Oceanologica Sinica,2003,22(3):385-394. |
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| Authors: | Jianming Pan Chuanyu Hu Jianfang Chen Xiaoya Liu Huaiyang Zhou and Weidong Ji |
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| Institution: | 1.Key Laboratory of Submarine Geosciences of State Oceanic Administration, Second Institute of Oceanography, State O-ceanic Administration, Hangzhou 310012, China2.Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | According to two cruises investigation information in summer and winter during 1998 and1999, the phosphorous concentration distribution and changes of summer and winter were discussed pri-marily in the South China Sea. The results show that the phosphate concentration of surface seawater insummer is distinctly lower than that in winter, averaging 0.04 μmol/dm3 in summer and 0.35 μmol/dm3 in winter. The organic phosphorous concentration of surface seawater in summer is higher than thatin winter, averaging 0.12μmol/dm3 in summer and 0.04 μmol/dm3 in winter respectively. The season-al changes of total phosphorus are similar to phosphate, averaging 0.22 μmol/dm3 in summer and 0.61μmol/dm3 in winter respectively. In vertical direction, phosphate, TDP and TP content are the lowestin upper 50 m water column, and increase in linearity rapidly with water depth, increasing slowly under500 m, reach to maximum about 1 000 m, then decrease slightly with water depth increasing. The ver-tical distribution is typical in summer, and there is small dispersed for phosphorus concentration for thesame depth of different stations. However, in winter there is a large disperse for phosphate, TDP andTP, specifically for phosphate at 200 m at which the concentration is maximum. This result indicatesthat there are large differences in hydrology and biology conditions that affect largely the chemical envi-ronment of the South China Sea. The organic phosphorus is the predominant in surface seawater of theSouth China Sea, but the inorganic phosphorus is the predominant in layers below depth of 150 m. Theorganic phosphorus concentration in deep water usually decreases with water depth increasing. The or-ganic phosphorus in summer is remarkably more than that in winter because of the strong biology activi-ties in summer. |
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| Keywords: | the South China Sea specific form phosphorus biogeochemistry processes |
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