The horizontal flux of biogenic elements through PN section in April 1994 was calculated in the present paper using output of the OPYC model, which is a very general global model solving the full primitive equations f...The horizontal flux of biogenic elements through PN section in April 1994 was calculated in the present paper using output of the OPYC model, which is a very general global model solving the full primitive equations forced by the atmospheric wind stress, observed heat flux, freshwater flux and cloudiness including a sea ice model both poles with rheology. However, since it is a global model, its resolution is rather coarse, less than 1°×1° horizontally and only 1 layer on continental shelf and 7 layers in the Okinawa Trough. We reconstructed the velocity profiles by ocean current modes evaluated from the hydrographic data along PN section and then used it to determine the flux of biogenic elements with the data collected during the Japanese cruise K94-04. The results shown that the volume transport was about 33×10 12 cm 3/s consistent with the OPYC model output, the maximum nitrate and phosphate flux densities were right on the shelf margin at the depth of about 300 m with the total fluxes 1.95×10 5 and 0.15×10 5 mol/s, respectively, the maximum dissolved oxygen and total carbon dioxide flux densities were on the surface layer near western side of the shelf margin and in the thermocline near the eastern side of the shelf margin with the total fluxes 1.43×10 8 L/s and 0.69×10 8 mol/s,respectively, through PN section in April 1994.展开更多
文摘The horizontal flux of biogenic elements through PN section in April 1994 was calculated in the present paper using output of the OPYC model, which is a very general global model solving the full primitive equations forced by the atmospheric wind stress, observed heat flux, freshwater flux and cloudiness including a sea ice model both poles with rheology. However, since it is a global model, its resolution is rather coarse, less than 1°×1° horizontally and only 1 layer on continental shelf and 7 layers in the Okinawa Trough. We reconstructed the velocity profiles by ocean current modes evaluated from the hydrographic data along PN section and then used it to determine the flux of biogenic elements with the data collected during the Japanese cruise K94-04. The results shown that the volume transport was about 33×10 12 cm 3/s consistent with the OPYC model output, the maximum nitrate and phosphate flux densities were right on the shelf margin at the depth of about 300 m with the total fluxes 1.95×10 5 and 0.15×10 5 mol/s, respectively, the maximum dissolved oxygen and total carbon dioxide flux densities were on the surface layer near western side of the shelf margin and in the thermocline near the eastern side of the shelf margin with the total fluxes 1.43×10 8 L/s and 0.69×10 8 mol/s,respectively, through PN section in April 1994.
