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A phytoplankton absorption-based primary productivity model for remote sensing in the Southern Ocean

机译：基于浮游植物吸收的南大洋遥感初级生产力模型

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摘要

Recent global environmental changes such as an increase in sea surface temperature (SST) are likely to impact primary productivity of phytoplankton in the Southern Ocean. However, models to estimate net primary production using satellite data use SST and uncertain estimation of chlorophyll a (chl-a) concentration. A primary productivity model for satellite ocean color data from the Southern Ocean, which is based on the light absorption coefficient of phytoplankton to reduce uncertainties of sea surface chl-a estimations and bias in optimal values of chl-a normalized productivity derived from SST, has been developed. The new model was able to estimate net primary productivity in the water column (PP_(eu)) without dependency on temperature when in the range of -2 to 25℃, and it explained 51% of the observed variability in PP_(eu) with a root mean square error (RMSE) of 0.15. Application of the model revealed that the SST dependent model has overestimated PP_(eu) in warmer waters around the Subtropical Front, and underestimated PP_(eu) in colder waters poleward of the Sub-Antarctic Front. This absorption-based primary productivity model contributes to a study of the relationship among spatio-temporal variations in the physical environment, and biogeochemical cycles in the Southern Ocean.
机译：最近的全球环境变化，例如海面温度（SST）升高，可能会影响南大洋浮游植物的初级生产力。但是，使用卫星数据估算净初级生产的模型使用SST和叶绿素a（chl-a）浓度的不确定估算。来自南大洋的卫星海洋颜色数据的主要生产力模型，该模型基于浮游植物的光吸收系数，以减少海面chl-a估计的不确定性和由SST导出的chl-a归一化生产率的最优值的偏差。已开发。新模型能够在-2至25℃的范围内估计水柱中的净初级生产力（PP_（eu）），而不受温度的影响，并且该模型解释了PP_（eu）观测到的51％的变异性。均方根误差（RMSE）为0.15。该模型的应用表明，依赖SST的模型在亚热带锋面附近较温暖的水域中高估了PP_（eu），而在南极锋面较冷的水域中低估了PP_（eu）。这种基于吸收的初级生产力模型有助于研究物理环境的时空变化与南大洋的生物地球化学循环之间的关系。

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  • 来源
    《Polar biology》 |2011年第2期|p.291-302|共12页
  • 作者

    Toru Hirawake; Shintaro Takao; Naho Horimoto; Takashi Ishimaru; Yukuya Yamaguchi; Mitsuo Fukuchi;

  • 作者单位

    Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, Japan;

    Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, Japan,National Institute of Polar Research, 10-3 Midori-machi, Tachikawa, Tokyo 190-8518, Japan;

    Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan;

    Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan;

    Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan;

    National Institute of Polar Research, 10-3 Midori-machi, Tachikawa, Tokyo 190-8518, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    light absorption coefficient; sea surface temperature; southern ocean; ocean color remote sensing; primary production;

    机译：光吸收系数海面温度南部海洋;海洋颜色遥感;初级生产;

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