Phytoplankton chlorophyll a pigment from T/S Oshoro maru 2023 Arctic Cruise / C145

To quantify phytoplankton abundance in the Chukchi Sea, we collected seawater samples at each station at three depths (mainly sea surface, fluorescence maximum, and near-bottom layer). The 250 ml water was filtered through the three meshes (20 micro-m, 2 micro-m, and 0.7 micro-m [GF/F filter]), and chlorophyll a was measured for each sample.为量化楚科奇海(Chukchi Sea)的浮游植物丰度，我们在每个采样站位的三个深度层采集海水样品，主要涵盖海面层、荧光峰值层与近底层。将每份250毫升的海水水样通过三种孔径滤筛（20微米、2微米及0.7微米[GF/F滤膜]）进行过滤，并对每个样品的叶绿素a含量进行测定。