Comparison of primary productivity models in the Southern Ocean-preliminary results

• Published in: SPIE Proceedings, Ocean Sensing and Monitoring II
• Main Authors: Shang, S. L., Behrenfeld, M. J., Lee, Z. P., O'Malley, R. T., Wei, G. M., Li, Y. H., Westberry, T., 商少凌
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2010
• Subjects: COLOR; BIOMASS; RATES; Southern Ocean
• Online Access: http://dspace.xmu.edu.cn/handle/2288/60167; https://doi.org/10.1117/12.853631

Three models were used to estimate primary productivity (PP) in the Southern Ocean for the summer of 2003-2007. They are the widely accepted model VGPM, a carbon-based model CbPM and a new type of model which uses phytoplankton absorption coefficient as input variable in stead of chlorophyll concentration. It was found that the degree of agreement among the results from three models was low, but the difference appeared relatively small with regard to previous reports. Nevertheless, the results were comparable to that from a PP model parameterized specifically for use in Southern Ocean waters. Among the three models, the output from CbPM differed the most from that estimated by the other two models. The different PP estimates were primarily attributed to the different ways these models treat phytoplankton physiology, along with the difference in input variables.