Phytoplankton photosynthesize in surface waters, exporting organic carbon to depth through the biological pump. Quantifying productivity and the export of carbon is important to understanding the global carbon cycle and predicting its future changes. An issue in quantifying rates is that the many existing methods are not all equivalent, making comparisons between studies using different methods challenging. Our goal is to compare in situ and in vitro methods in order to identify where methods agree in the NE subarctic Pacific. During this study, we measured productivity using two in situ methods (oxygen/argon ratio and triple oxygen isotope mass balance approaches) and four in vitro methods (¹³C, , , and H₂¹⁸O uptake rates through incubations), and compared the results with one satellite‐based productivity estimate. The in situ carbon export method was consistently higher than the in vitro method, likely due to dissolved organic matter release not included in our incubation measurements. Upwelling bringing low‐O₂ water to the surface and the interaction between bloom dynamics and a method's inherent time of integration cause outliers from the relationship. In contrast, in situ and in vitro methods for estimating gross primary production were consistent across a wide range in rates. We find that chlorophyll‐a concentration is strongly related to many of our measured rates. Satellite estimates of primary production are consistently different from ¹³C incubations. Our identification of consistent trends and causes for disagreement will allow observations from one method to be converted to another, facilitating future comparisons across studies.

中文翻译：

---

东北亚太平洋太平洋生产率方法之间的一致关系

浮游植物在地表水中进行光合作用，通过生物泵向深处输出有机碳。量化生产力和碳出口对于了解全球碳循环并预测其未来变化非常重要。量化率的一个问题是，许多现有方法并不完全等同，这使得使用不同方法进行研究之间的比较具有挑战性。我们的目标是比较原位和体外方法，以便确定东北亚太平洋太平洋地区的方法在哪里。在该研究期间，我们测量使用两种原位方法（氧/氩比和三氧同位素质量平衡接近）和四个体外方法（生产率¹³ C， ，，和H ₂ ¹⁸通过孵化获得的O吸收率），并将结果与​​基于卫星的生产率估算值进行比较。原位碳输出方法始终高于体外方法，这可能是由于我们的孵育测量中未包含溶解的有机物释放所致。上升流将低O ₂水带到地表，水华动力学与方法的固有积分时间之间的相互作用导致了这种关系的异常。相比之下，原位和体外估算初级生产总值的方法在很大范围内均保持一致。我们发现叶绿素a的浓度与我们测得的许多比率密切相关。卫星对初级生产的估算始终与^13个不同C孵化。我们对一致趋势和分歧原因的识别将使从一种方法获得的观察结果转换为另一种方法，从而便于将来进行研究之间的比较。