| CHEN Hongtao,YU Zhigang,YAO Qingzheng,MI Tiezhu,LIU Pengxia. 2010. Nutrient concentrations and fluxes in the Changjiang Estuary during summer. Acta Oceanologica Sinica, (2):107－119 |
| Nutrient concentrations and fluxes in the Changjiang Estuary during summer |
| Nutrient concentrations and fluxes in the Changjiang Estuary during summer |
| Received:October 31, 2008 Revised:December 09, 2009 |
| DOI：10.1007/s13131-010-0029-8 |
| Key words:nutrients estuarine environment distribution behaviour transport China Changjiang Estuary |
| 中文关键词: nutrients estuarine environment distribution behaviour transport China Changjiang Estuary |
| 基金项目:The National Natural Science Foundation of China (NSFC) under contract No. 30490232; Chinese "973" Project under contract Nos 2002CB412405 and 2005CB422305. |
| Author Name | Affiliation | E-mail | | CHEN Hongtao | Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China | | | YU Zhigang | Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China | zhigangyu@ouc.edu.cn | | YAO Qingzheng | Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China | | | MI Tiezhu | Key Laboratory of Marine Environment Science and Ecology of Ministry of Education, Ocean University of China, Qingdao 266100, China | | | LIU Pengxia | Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| In June 2003 and 2006 concentrations of nutrient were determined in the Changjiang Estuary. The data indicated that phosphate and nitrate did not behave conservatively in the estuary, but silicate behaved conservatively. An important mobilization of phosphate and nitrate was observed from the river up to halfway in the estuary. Both input flux (from river to estuary) and output flux (from estuary to coastal zone) of phosphate, silicate and nitrate were calculated from statistical interpretations of the salinity profiles. There was a large discrepancy between input and output fluxes of phosphate and nitrate. The river fluxes of silicate, phosphate and nitrate (fr) are augmented 5.3%, 28.9% and 36.6% in June 2003 and 1.0%, 62.5%, 31.7% in June 2006 by internal inputs (fi). The phosphate and nitrate fluxes are enhanced through the estuarine process, while silicate flux is unaltered. The authors present some long-term data for nutrient concentrations and the ratios of silicon to nitrogen to phosphorus in the Changjiang Estuary. Silicate level falled in the last two decades, while concentration of nitrate increased. Phosphate concentration had no significant change. |
| 中文摘要: |
| In June 2003 and 2006 concentrations of nutrient were determined in the Changjiang Estuary. The data indicated that phosphate and nitrate did not behave conservatively in the estuary, but silicate behaved conservatively. An important mobilization of phosphate and nitrate was observed from the river up to halfway in the estuary. Both input flux (from river to estuary) and output flux (from estuary to coastal zone) of phosphate, silicate and nitrate were calculated from statistical interpretations of the salinity profiles. There was a large discrepancy between input and output fluxes of phosphate and nitrate. The river fluxes of silicate, phosphate and nitrate (fr) are augmented 5.3%, 28.9% and 36.6% in June 2003 and 1.0%, 62.5%, 31.7% in June 2006 by internal inputs (fi). The phosphate and nitrate fluxes are enhanced through the estuarine process, while silicate flux is unaltered. The authors present some long-term data for nutrient concentrations and the ratios of silicon to nitrogen to phosphorus in the Changjiang Estuary. Silicate level falled in the last two decades, while concentration of nitrate increased. Phosphate concentration had no significant change. |
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