Data on algae density and its influencing factors for major lakes in China

This is data on algae density and its influencing factors for major lakes in China. The dataset comprises algal cell density (AD), water quality parameters, and meteorological variables, spanning the period from June 2021 to June 2024. Water quality data were sourced from National Surface Water Quality Automatic Monitoring System of China, operated by the National Environmental Monitoring Centre. This real-time monitoring network provides high-frequency observations of key parameters, including water temperature (TEMP), pH, dissolved oxygen (DO), conductivity (CON), permanganate index (PI), turbidity (TUR), ammonia nitrogen (NH), total nitrogen (TN), total phosphorus (TP), and chlorophyll-a (Chla). The nitrogen-to-phosphorus ratio (N-P) was also calculated. Meteorological data were obtained from NASA’s POWER project and included air temperature at 2 m (AT), precipitation (PRE), wind speed (WS), wind direction (WD), and all-sky downward shortwave radiation (SW). Water quality and meteorological variables were daily aligned to ensure consistency.本数据集涵盖中国主要湖泊的藻类密度及其影响因子相关数据，包含藻类细胞密度（algal cell density, AD）、水质参数与气象变量，时间跨度为2021年6月至2024年6月。水质数据源自中国国家环境监测总站运维的中国国家地表水水质自动监测系统，该实时监测网络可提供关键参数的高频观测数据，涵盖水温（water temperature, TEMP）、pH、溶解氧（dissolved oxygen, DO）、电导率（conductivity, CON）、高锰酸盐指数（permanganate index, PI）、浊度（turbidity, TUR）、氨氮（ammonia nitrogen, NH）、总氮（total nitrogen, TN）、总磷（total phosphorus, TP）以及叶绿素a（chlorophyll-a, Chla），此外还计算了氮磷比（nitrogen-to-phosphorus ratio, N-P）。气象数据源自美国国家航空航天局（NASA）的POWER项目，包含2米高度气温（air temperature at 2 m, AT）、降水量（precipitation, PRE）、风速（wind speed, WS）、风向（wind direction, WD）以及全天向下短波辐射（all-sky downward shortwave radiation, SW）。为确保数据一致性，所有水质与气象变量均已按日对齐整合。