Absorbance and Excitation Emission spectra (EEMs) measurements of the Tapajós River, Brazil from 2016-2023

This dataset includes individual absorbance spectra and excitation emission fluorescence spectra from river water sampled near-monthly from the Tapajós River, Brazil between 2016-2023. Both absorbance and fluorescence data were collected on a Horiba Aqualog spectrophotometer. Trends in optical absorbance and fluorescence maxima reveal signatures for DOM sourcing into the river as well as evidence for in-stream processing and molecular stability of exported organic matter.本数据集涵盖2016年至2023年间，巴西塔帕若斯河（Tapajós River）近月度采集的河流水体的独立吸收光谱与激发发射荧光光谱。所有吸收与荧光光谱数据均通过堀场（Horiba）Aqualog分光光度计采集获取。光吸收峰值与荧光峰值的变化趋势，可揭示汇入该河流的溶解性有机质（Dissolved Organic Matter, DOM）的来源特征，同时也能为河道原位处理过程以及输出有机质的分子稳定性提供佐证依据。