2026-10-14T14:09:12Z https://www.scidb.cn/oai

10.57760/sciencedb.43177 2026-07-28T14:37:22Z

2026-07-28 Water evaporation as a key driver of summer ammonia flux in urban Beijing doi:10.57760/sciencedb.43177 en This dataset contains the primary data used to generate all figures presented in the main text and the supplementary materials of the manuscript entitled "Water evaporation as a key driver of summer ammonia flux in urban Beijing". The data were collected during a 73‑day field campaign from June to September 2022 at a 220‑m level on a 325‑m meteorological tower in urban Beijing, China. Measurements include half‑hourly fluxes of ammonia (NH₃), nitrous oxide (N₂O), and carbon dioxide (CO₂) obtained using the eddy covariance technique with a quantum cascade tunable infrared laser direct absorption spectrometer (QC‑TILDAS‑DUAL) and a three‑dimensional ultrasonic anemometer. Supporting meteorological variables, including latent heat flux, sensible heat flux, friction velocity (u*), atmospheric stability, and boundary layer height, are also provided. All data are quality‑controlled, with flagging based on steady‑state and turbulence criteria, and gap‑filled where necessary. The data are provided in Microsoft Excel (.xlsx) format, organized by figure number for direct reproducibility. Detailed descriptions of the variables, units, and data processing procedures are provided in the accompanying manuscript and its supplementary materials. eddy covariance; NH3 flux; water evaporation 陈颢元 宋涛 王凯 王迎红 程萌田 刘保献 马志强 唐贵谦 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank