Dissolved organic matter molecular composition in the NW Mediterranean Sea, FT-ICR MS data

in the mediterranean sea, an accumulation of dissolved organic matter (dom) is observed during the stratified summer period, which is decoupled from the spring phytoplankton maxima. we hypothesize that dom composition in summer changes its composition, from labile dom in spring to recalcitrant prokaryote-derived compounds during the summer accumulation period. to test this, we tracked the seasonality of dom molecular composition and chemical diversity using fourier transmission-ion cyclotron resonance mass spectrometry (ft-icr ms) from 2019 to 2021 in a monthly sampled time series in the nw mediterranean sea. this dataset presents this dom data, presented as the lists of all molecular formulae per sample with, their absolute and relative intensity per analytical triplicate and their mass to charge ratios.

在地中海海域，在夏季分层期间观察到溶解有机物（DOM）的累积，其与春季浮游植物的峰值解耦。我们假设夏季DOM的组成发生改变，从春季的易分解DOM转变为夏季累积期间的耐降解原核生物衍生物。为了验证这一假设，我们利用傅里叶变换-离子回旋共振质谱法（FT-ICR MS），从2019年至2021年对西北地中海海域进行月度采样，追踪了DOM分子组成和化学多样性的季节性变化。本数据集展示了这些DOM数据，包括每个样本的所有分子式列表，以及每分析重复的绝对和相对强度，以及其质量电荷比。