A dataset of carbon and water fluxes in the Changling alkali-saline paddy rice fields in the Songnen Plain, China (2018 –2020)

As one farmland site observed by the Chinese Flux Observation and Research Network (ChinaFLUX), this dataset collected field measurement of Changling alkali-saline paddy rice during 2018–2020 of Songnen Plain. It represents a typical and regional agricultural type in Northeast China.The dataset specifically includes half-hourly, daily, monthly and yearly scales of air temperature (Ta), air relative humidity (RH), water vapor pressure (e), saturated water vapor pressure (es), wind speed (Ws), wind direction (Wd), soil temperature (Ts), soil water content (SWC), rainfall (P), photosynthetically active radiation (PAR), net radiation (Rn) with four components, sensible heat flux (Hs), latent heat flux (LE), evapotranspiration (ET), net ecosystem CO2 exchange (NEE), ecosystem respiration (Re), gross ecosystem exchange (GEE), etc. The establishment and sharing of this dataset will provide the data support and theoretical basis for regional farmland ecosystem assessment and management.