Aggregate Sinking Velocity from the CO2 Aggregation Experiment from UCSB Marine Science Institute Passow Lab from 2009 to 2010 (OA - Ocean Acidification and Aggregation project)

<p><strong>Series 2: CO2 Aggregation Experiment - Aggregate Sinking Velocity</strong></p>

<p>The sinking velocities of ten randomly selected aggregates from each tank were measured<br />
in a 2-liter cylindrical settling column that was 8 cm wide in a temperature constant room . Each<br />
aggregate was allowed to sink out of the wide bore pipette into the settling column. The duration<br />
of the descent of the aggregate over a distance of 20 cm, from 6 cm below the surface to 6 cm<br />
above the bottom, was monitored using a stop watch. Just before this, the length and width of<br />
each aggregate were measured to the nearest mm under a dissecting scope. Aggregate volume<br />
was calculated based on an ellipsoid shape, assuming that width and depth were identical.</p>

<p><strong>Reference:</strong> Passow, U., Rocha, C.L.D.L., Fairfield, C., Schmidt, K., 2014. Aggregation as a function of pCO2 and mineral particles. Limnology and Oceanography 59 (2), 532-547.</p>

**系列2：二氧化碳聚集实验——聚集物沉降速度**

从每个培养罐中随机选取10个聚集物，于恒温实验室中在内径8 cm的2升圆柱形沉降柱内测量其沉降速度。将每个聚集物通过宽口移液管转移至沉降柱中使其自然沉降，使用秒表记录其从液面下6 cm处沉降至柱底上方6 cm处、总沉降距离20 cm所需的时长。在此沉降速度测量前，借助解剖显微镜对每个聚集物的长度与宽度进行测量，精度可达1毫米。假设聚集物的宽度与厚度相等，基于椭球体体积公式计算其体积。

**参考文献**：Passow, U., Rocha, C.L.D.L., Fairfield, C., Schmidt, K., 2014. 聚集行为随分压二氧化碳（pCO₂）与矿物颗粒的变化规律. 《湖沼学与海洋学》, 59(2): 532-547.