A depth-resolved primary production model for stratified water in the Yellow Sea

Sinjae Yoo; Yu-Hwan Ahn; Jisoo Park

doi:10.1117/12.805233

19 December 2008 A depth-resolved primary production model for stratified water in the Yellow Sea

Sinjae Yoo, Yu-Hwan Ahn, Jisoo Park

Proceedings Volume 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters; 71500Z (2008) https://doi.org/10.1117/12.805233
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

Abstract

Despite some efforts to get better estimation of the primary production of the Yellow Sea, there is still uncertainty in the estimates. Extreme range of the environmental factors through seasons makes the estimation difficult. The high variability in environmental characteristics calls for using satellite data for better estimation of the primary production of the Yellow Sea. To achieve the goal with reasonable accuracy using satellite data, there are many problems to resolve such as retrieval of chlorophyll and diffuse attenuation coefficient of PAR, and estimation of physiological parameters and vertical structure of chlorophyll in water column. Here we analyzed 66 vertical profiles of chlorophyll-a obtained during March-August in 1994-2001 period. Using some relationships among parameters, we attempt to retrieve subsurface chlorophyll profiles only from KPAR (downwelling attenuation coefficient of PAR) and surface chlorophyll-a values. Although uncertainty was high in predicting accurate shape of the profiles (e.g., exact depth of subsurface chlorophyll maximum), fairly accurate estimation of depth-integrated primary production was made given appropriate P-I parameters. We also compared the estimates with those from VGPM (vertically generalized production model). VGPM gave much higher estimates than simulated in-situ depthintegrated primary production. The reason of the discrepancy seems that P_opt ^B from VGPM formulation were higher than estimated in-situ P_opt ^B . Adjusted VGPM gave better results than original VGPM. But the depth-resolved model was better than the adjusted VGPM in terms of fitness and bias.

Citation Download Citation

Sinjae Yoo, Yu-Hwan Ahn, and Jisoo Park "A depth-resolved primary production model for stratified water in the Yellow Sea", Proc. SPIE 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters, 71500Z (19 December 2008); https://doi.org/10.1117/12.805233

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