2026-10-14T05:23:37Z https://www.scidb.cn/oai

10.57760/sciencedb.23503 2025-04-25T10:29:17Z

2025-04-25 Eight ions dataset of surface water at the Beijing-Tianjin-Hebei National Field Station from 2009 to 2022 doi:10.57760/sciencedb.23503 en This data set collates the data of eight major ions (Ca2+, Mg2+, Na+, K+, HCO3-, CO32-, SO42-, Cl -) in surface water of 51 long-term conventional monitoring stations of Chinese Academy of Sciences Beijing Tianjin Hebei National Field Station from 2009 to 2022, with 36007 numerical values. The compilation and publication of this dataset can provide a data foundation for exploring the characteristics of changes in Beijing's urban ecosystem, and provide scientific support for understanding the chemical changes in urban surface water.  Beijing; urban ecosystems; Surface water; Eight major ions wang si qi Ren Yufen Wang Xiaoke Zhang Hongxing Su Zhimin Lu Fei Sun Xu Zhou Weiqi RESTRICTED dataset Science Data Bank