From Ruisdael Observatory Data Catalog
| Dataset: RIVM NH3 flux data HT8700E at Loobos
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| title
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RIVM NH3 flux data HT8700E at Loobos
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| description
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[[description::This dataset contains half-hourly measurements (obtained between 2023-08-25 and 2024-09-04) of atmospheric ammonia ([NH₃]) concentrations and fluxes, alongside supporting meteorological data and ecosystem carbon fluxes, collected at the Loobos ICOS Class 2 ecosystem station (NL-Loo) in the Netherlands.
NH3-concentration was measured using a high-frequency HT8700E (HT) quantum cascade laser (QCL) system and at low-frequency using a miniDOAS 2.2 (mD; open-path, differential optical absorption spectroscopy). The mD served as the reference for field calibration of the HT. Ammonia fluxes were calculated using the eddy covariance (EC) technique, with the HT and a 3D sonic anemometer (Gill HS50) mounted at 38.2 m. Flux data were processed using EddyPro (v7.0.4), with corrections for high-frequency spectral losses and atmospheric density fluctuations. Data quality filters are included which ensure high instrumental quality, reliable turbulence (u*-thresholds), and footprint representativity. Flux gap-filling was performed using eXtreme Gradient Boosting (XGBoost), incorporating meteorological and biological drivers. The dataset also includes meteorological data (temperature, humidity, wind, radiation, precipitation) collected at the top of the measurement tower (38m), leaf wetness measurements along the tower, soil conditions (moisture), and leaf area index (LAI). Ecosystem carbon fluxes (NEE, GPP, RE) are also included. Measurements of meteorological and soil quanitites at additional levels are available at the ICOS data portal.
For a detailed description and analysis of the dataset, please visit https://doi.org/10.1016/j.agrformet.2026.111358.]]
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| Keywords
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Fluxes, Forest, NH3, Eddy Covariance, HT, HT8700E
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| type See Dataset Types' descriptions in Dataset type taxon descriptions
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In-situ Observation
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| format
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csv
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| served by data service
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RIVM Luchtmeetnet Dataset, WUR Dataportal
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| landing page
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https://zenodo.org/records/20666694
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| PID
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https://doi.org/10.1016/j.agrformet.2026.111358
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| license
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CC BY 4.0
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| contact person
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Ewout Melman
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| creator
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Ewout Melman
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| organization
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RIVM
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| Geographic and Temporal Information
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| location
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Loobos
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| geographic coordinates
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52° 9' 59.39" N, 5° 44' 36.89" E
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| elevation (meters)
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3333 m <br />
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| start date
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2023-08-24
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| end date
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2024-09-04
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| Campaigns that contribute to Dataset
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