WUR Ozone concentration and fluxes (2025) at Loobos (NL-Loo)

Dataset: WUR Ozone concentration and fluxes (2025) at Loobos (NL-Loo)
title	WUR Ozone concentration and fluxes (2025) at Loobos (NL-Loo)
description	Since March 2025 ozone concentration and flux observations have been collected at Loobos, NL (52.166446 degN, 5.743575 degE). A fast Eddy-Correlation system measuring at 20 Hz has been installed at the top of the tower (38m), well above the forest canopy. Simultaneously, a slow Thermo Model 49C O3 Analyzer has been installed to measure ozone concentrations at a 1-minute interval. Both instruments are cross-calibrated.
Keywords	Air Quality, Concentrations, Ecosystem, Fluxes, Forest, Loobos, Ozone
type See Dataset Types' descriptions in Dataset type taxon descriptions	In-situ Observation
format	csv
served by data service	YODA
landing page	https://publication.yoda.wur.nl/full/WUR01/6UGU9F.html
PID	doi.org/10.17887/WUR01-6UGU9F
license	CC BY 4.0
contact person	Michiel van der Molen, Sjoerd Barten
creator	Michiel van der Molen, Sjoerd Barten
organization	Wageningen University

Geographic and Temporal Information
location	Loobos
geographic coordinates	52.166446 N, 5.743575 E
elevation (meters)	38m
start date	2025-03-01
end date	2025-12-31
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Related Media to WUR Ozone concentration and fluxes (2025) at Loobos (NL-Loo)

Since March 2025 ozone concentration and flux observations have been collected at Loobos, NL (52.166446 degN, 5.743575 degE). A fast Eddy-Correlation system measuring at 20 Hz has been installed at the top of the tower (38m), well above the forest canopy. Simultaneously, a slow Thermo Model 49C O3 Analyzer has been installed to measure ozone concentrations at a 1-minute interval. Both instruments are cross-calibrated.

Dataset underlying the publications:

Zhao, H., Dolman, H., Elbers, J., Jans, W., Kruijt, B., Moors, E., Snellen, H., Vila-Guerau de Arellano, J., Peters, W., Krol, M. C., Hutjes, R., and van der Molen, M.: The Loobos ecosystem first tower dataset: meteorology, turbulent fluxes and net ecosystem exchange (1996 to 2021), Earth Syst. Sci. Data, 18, 2023–2045, https://doi.org/10.5194/essd-18-2023-2026, 2026.

van der Molen, M. K., Snellen, H., Holzinger, R., Barten, J. G. M., Zhao, H., Ganzeveld, L., Fry, J., Peters, W., Krol, M., Vila-Guerau de Arrelano, J., and Kruijt, B.: The ICOS Ecosystem Station Loobos: a pine forest site exposed to atmospheric pollution, Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2026-99, in review, 2026.

The file & folder structure is as follows:

Year

___ Month

______ NL-Loo_O3_yyyymmdd_F65.csv

______ NL-Loo_O3_yyyymmdd_L06_F62.csv

______ NL-Loo_O3_yyyymmdd_F63.csv

F65: 5-minute concentration data to perform the calibration

L06_F62: 30-minute ozone fluxes, without application of the calibration, the flux is given in m s-1

F63: Calibration of Fast Ozone Sensor (30 minute time base)

Contact information: observations.maq@wur.nl