| Guo Binghuo,Ge Renfeng. 1997. Role of Kuroshio frontal eddy in exchange between shelf water and Kuroshio water in East China Sea. Acta Oceanologica Sinica, (1):1－18 |
| Role of Kuroshio frontal eddy in exchange between shelf water and Kuroshio water in East China Sea |
| Role of Kuroshio frontal eddy in exchange between shelf water and Kuroshio water in East China Sea |
| Received:October 04, 1995 Revised:June 15, 1996 |
| DOI： |
| Key words:Kuroshio in the East China Sea frontal eddy water exchange nutrient flux |
| 中文关键词: Kuroshio in the East China Sea frontal eddy water exchange nutrient flux |
| 基金项目:The project was supported by the National Natural Science Foundation of China under contract No. 49376259. |
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| Abstract: |
| Basic patterns of the reversal of the Kuroshio water toward the shelf,intrusion of the shelf mixed waterinto the Kuroshio and uplifting of the near-bottom nutrient-rich water into the upper layer by the pumping of the frontal eddy are analyzed on the basis of satellite infrared images and hydrologic,chemical and biological observations.Results show that the Kuroshio frontal eddies play a very important role in the exchange between the shelf water and the Kuroshio water.The estimation of the average volume transports for three frontal eddy events indicates that the shelf mixed water entrained by an eddy into Kuroshio is 0.44×106 m3/s and the reversal Kuroshio water onto the shelf region only 0.04×106 m3/s.Along the whole shelf edge,the volume transport of the shelf mixed water entrained by the eddies into the Kuroshio is 1.8×106 m3/s.The nutrient (NO3-N) flux pumped to the euphotic zone and input to the continental shelf through a column with 1 m wide is 974 μmol/(s·m) when there is frontal eddy and only 79 μmol/(s·m) in the case of no frontal eddy.Yearly nutrient (NO3-N) flux input to the shelf area caused by the frontal eddy is 1.7×106 t/a. |
| 中文摘要: |
| Basic patterns of the reversal of the Kuroshio water toward the shelf,intrusion of the shelf mixed waterinto the Kuroshio and uplifting of the near-bottom nutrient-rich water into the upper layer by the pumping of the frontal eddy are analyzed on the basis of satellite infrared images and hydrologic,chemical and biological observations.Results show that the Kuroshio frontal eddies play a very important role in the exchange between the shelf water and the Kuroshio water.The estimation of the average volume transports for three frontal eddy events indicates that the shelf mixed water entrained by an eddy into Kuroshio is 0.44×106 m3/s and the reversal Kuroshio water onto the shelf region only 0.04×106 m3/s.Along the whole shelf edge,the volume transport of the shelf mixed water entrained by the eddies into the Kuroshio is 1.8×106 m3/s.The nutrient (NO3-N) flux pumped to the euphotic zone and input to the continental shelf through a column with 1 m wide is 974 μmol/(s·m) when there is frontal eddy and only 79 μmol/(s·m) in the case of no frontal eddy.Yearly nutrient (NO3-N) flux input to the shelf area caused by the frontal eddy is 1.7×106 t/a. |
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