We introduced a simple methodology to determine basin-wide marine export production ratios during spring phytoplankton bloom periods by combining monthly varying mixed layer depths (MLD) derived from observed temperature depth profiles, satellite time series of chlorophyll-a (Chl-a) concentrations, and hypothetical critical depth. The MLD-Chl-a based approach yielded monthly export ratios reflecting seasonal variability of net community production in correlation with the MLD variations. Regional averages of export ratio in the spring for the southern part of the East Sea (36–39°N, 130–134°E), North Pacific Ocean (42–45°N, 151–155°E), and North Atlantic Ocean (57–60°N, 17–21°W) are 0.44 ± 0.22, 0.42 ± 0.16, and 0.73 ± 0.29, respectively, which compare favorably with prior field data. This suggests that the approach enables estimation of export production ratios with high spatial and temporal resolutions, complementing the methods that rely on extrapolation of limited field measurements to larger space and time scales.

我们引入了一种简单的方法来确定春季浮游植物开花期期间流域范围内的海洋出口生产比率，方法是结合观察到的温度深度剖面，叶绿素-a（Chl-a）浓度的卫星时间序列，和假设的临界深度。基于MLD-Chl-a的方法得出的月出口比率反映了与MLD变化相关的净社区生产的季节性变化。东海南部地区（36-39°N，130-134°E），北太平洋地区（42-45°N，151-155°E）和北大西洋春季春季出口率的区域平均值海洋（北纬57-60°，西经17-21°）分别为0.44±0.22、0.42±0.16和0.73±0.29，与以前的实地数据相比具有优势。