A5059963553- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Odor and Emission Control Technologies
- Air Quality Monitoring and Forecasting
- Soil and Water Nutrient Dynamics
- Plant responses to elevated CO2
- Spectroscopy and Laser Applications
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Wind and Air Flow Studies
- Climate variability and models
- Atmospheric aerosols and clouds
- Fire effects on ecosystems
- Hydrocarbon exploration and reservoir analysis
- Vehicle emissions and performance
- Soil Carbon and Nitrogen Dynamics
- Climate Change Policy and Economics
- Botany and Plant Ecology Studies
- Landfill Environmental Impact Studies
- Offshore Engineering and Technologies
- Environmental Policies and Emissions
Netherlands Organisation for Applied Scientific Research
2020-2025
Nuclear Research and Consultancy Group
2022-2023
Energy Research Centre of the Netherlands
2008-2017
Institute of Chemistry of Silicates named after I.V. Grebenshchikov
2009
University of Bern
2009
Wageningen University & Research
2007
Division of Fossil Fuels Energy
2007
Significance Wetlands are unique ecosystems because they in general sinks for carbon dioxide and sources of methane. Their climate footprint therefore depends on the relative sign magnitude land–atmosphere exchange these two major greenhouse gases. This work presents a synthesis simultaneous measurements methane fluxes to assess radiative forcing natural wetlands converted agricultural or forested land. The net impact is strongly dependent whether managed. Here we show that conversion...
Most trees form symbioses with ectomycorrhizal fungi (EMF) which influence access to growth-limiting soil resources. Mesocosm experiments repeatedly show that EMF species differentially affect plant development, yet whether these effects ripple up the growth of entire forests remains unknown. Here we tested composition and functional genes relative variation in well-known drivers tree by combining paired molecular surveys high-resolution forest inventory data across 15 European countries. We...
During the summer of 2018, a widespread drought developed over Northern and Central Europe. The increase in temperature reduction soil moisture have influenced carbon dioxide (CO2) exchange between atmosphere terrestrial ecosystems various ways, such as photosynthesis, changes ecosystem respiration, or allowing more frequent fires. In this study, we characterize resulting perturbation atmospheric CO2 seasonal cycles. 2018 has good coverage European regions affected by drought, investigation...
Abstract. The second Cabauw Intercomparison of Nitrogen Dioxide measuring Instruments (CINDI-2) took place in (the Netherlands) September 2016 with the aim assessing consistency multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements tropospheric species (NO2, HCHO, O3, HONO, CHOCHO and O4). This was achieved through coordinated operation 36 spectrometers operated by 24 groups from all over world, together a wide range supporting reference observations (in situ...
Enteric fermentation and manure methane emissions from livestock are major anthropogenic greenhouse gas emissions. In general, direct measurements of farm-scale scarce due to the source complexity limitations existing atmospheric sampling methods. Using an innovative UAV-based active AirCore system, we have performed accurate CH4 mole fractions downwind a dairy cow farm in Netherlands on four individual days during period March 2017 2019. The total emission rates were determined using mass...
Deposition of reactive nitrogen causes detrimental environmental effects, including biodiversity loss, eutrophication, and soil acidification. Measuring modeling the biosphere-atmosphere exchange ammonia, most abundant reduced species, is complex due to its high reactivity solubility, often leading systematic discrepancies between model predictions observations. This study aims determine whether three state-of-the-art schemes for NH3 can accurately NH3 in a dune ecosystem detect...
Abstract. An intercomparison is made of the Net Ecosystem Exchange CO2, NEE, for eight Dutch grassland sites: four natural grasslands, two production grasslands and meteorological stations within a rotational region. At all sites NEE was determined during at least 10 months per site, using eddy-covariance (EC) technique, but in different years. The does not include any import or export other than CO2. photosynthesis-light response analysis technique used along with respiration-temperature to...
Abstract. Since 1992 semi-continuous in-situ observations of greenhouse gas concentrations have been performed at the tall tower Cabauw (4.927° E, 51.971° N, −0.7 m a.s.l.). Through up to now, measurement system has gradually extended and improved in precision, starting with CO2 CH4 from 200 a.g.l. vertical gradients 4 levels gases CO2, CH4, SF6, N2O, H2, CO 2 for 222Rn. In this paper systems results are described main CO, whole period. The automatic now provides half-hourly concentration a...
This letter provides an overview of the available measurement techniques for nitrous oxide (N 2 O) flux measurement.It is presented to aid choice most appropriate methods different situations.Nitrous a very potent greenhouse gas; effect 1 kg N O estimated be equivalent 300 CO .Emissions from soil have larger uncertainty compared other gases.Important reasons this are low atmospheric concentration levels and enormous spatial temporal variability.Traditionally such small increases measured by...
Abstract. A quantum cascade laser spectrometer was evaluated for eddy covariance flux measurements of CH4 and N2O using three months continuous at a field site. The required criteria including continuity, sampling frequency, precision stationarity were examined. system operated continuously dairy farm on peat grassland in the Netherlands from 17 August to 6 November 2006. An automatic liquid nitrogen filling infrared detector employed provide unattended operation system. electronic frequency...
Abstract. Improved data on biosphere-atmosphere exchange are fundamental to understanding the production and fate of ammonia (NH3) in atmosphere. The GRAMINAE Integrated Experiment combined novel measurement modelling approaches provide most comprehensive analysis interactions date. Major inter-comparisons micrometeorological parameters NH3 flux measurements using aerodynamic gradient method relaxed eddy accumulation (REA) were conducted. These showed close agreement, though REA systems...
Abstract. Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment nitrogen deposition, yet flux measurement methods remain highly uncertain. To address this issue, a major inter-comparison fluxes over intensively managed grassland was conducted during the GRAMINAE Integrated Experiment held in Braunschweig, Germany. In order to provide robust dataset with vegetation, four independent continuous gradient systems were operated. Three...
Annual terrestrial balances of methane (CH 4 ) and nitrous oxide (N 2 O) are presented for a managed fen meadow in the Netherlands 2006, 2007 2008, using eddy covariance (EC) flux measurements. emissions derived from different methods compared. The most accurate annual CH is achieved by gap filling EC fluxes with an empirical multivariate regression model, soil temperature mean wind velocity as driving variables. This model explains about 60% variability observed daily fluxes. N O can be...
Abstract. The EMEP/EEA guidebook 2009 for agricultural emission inventories reports an average ammonia (NH3) factor (EF) by volatilisation of 55% the applied total ammoniacal nitrogen (TAN) content cattle slurry, and 35% losses pig irrespective type surface or slurry characteristics such as dry matter pH. In this review article, we compiled over 350 measurements EFs published between 1991 2011. standard application technique during early years period, when a large number were made, was...
Abstract. It is generally known that managed, drained peatlands act as carbon (C) sources. In this study we examined how mitigation through the reduction of intensity land management and rewetting may affect greenhouse gas (GHG) emission C balance intensively drained, agricultural peatlands. Carbon GHG balances were determined for three in western part Netherlands from 2005 to 2008 by considering spatial temporal variability emissions (CO2, CH4 N2O). One area (Oukoop) an managed...
Site-specific methane (CH4) and ethane (C2H6) emission rates from the onshore oil gas (O&G) sector in Romania were quantified, using mobile tracer dispersion method. As part of coordinated Romanian Methane Emission Oil & Gas measurement campaign, this study supported investigation CH4 emissions O&G around Bucharest. measured at 200 sites highly skewed with a heavy tail described by factor (EF) 95% confidence interval (CI) equal to 0.53 [0.32; 0.79] kg h–1 site–1. Of investigated...