Alex T. Vermeulen

Alex T. Vermeulen
Lund University | LU · Department of Physical Geography and Ecosystem Science

About

194
Publications
29,955
Reads
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5,145
Citations
Additional affiliations
April 2016 - present
ICOS ERIC
Position
  • Managing Director
June 2014 - April 2016
Lund University
Position
  • Managing Director
April 1989 - June 2014
ECN part of TNO
Position
  • Senior Researcher
Education
September 1983 - April 1988
Wageningen University & Research
Field of study
  • Environmental Sciences, Air Pollution

Publications

Publications (194)
Preprint
We present the CarbonTracker Europe High-Resolution system that estimates carbon dioxide (CO2) exchange over Europe at high-resolution (0.1 x 0.2°) and in near real-time (about 2 months latency). It includes a dynamic fossil fuel emission model, which uses easily available statistics on economic activity, energy-use, and weather to generate fossil...
Article
Full-text available
The CO 2 Human Emissions project has generated realistic high-resolution 9 km global simulations for atmospheric carbon tracers referred to as nature runs to foster carbon-cycle research applications with current and planned satellite missions, as well as the surge of in situ observations. Realistic atmospheric CO 2 , CH 4 and CO fields can provide...
Article
Full-text available
Global population projections foresee the biggest increase to occur in Africa with most of the available uncultivated land to ensure food security remaining on the continent. Simultaneously, greenhouse gas emissions are expected to rise due to ongoing land use change, industrialisation, and transport amongst other reasons with Africa becoming a maj...
Article
Full-text available
Since 1750, land use change and fossil fuel combustion has led to a 46 % increase in the atmospheric carbon dioxide (CO 2 ) concentrations, causing global warming with substantial societal consequences. The Paris Agreement aims to limiting global temperature increases to well below 2°C above pre-industrial levels. Increasing levels of CO 2 and othe...
Article
Full-text available
Atmospheric inversions have been used for the past two decades to derive large-scale constraints on the sources and sinks of CO2 into the atmosphere. The development of dense in situ surface observation networks, such as ICOS in Europe, enables in theory inversions at a resolution close to the country scale in Europe. This has led to the developmen...
Article
Full-text available
An optimal network design was carried out to prioritise the installation or refurbishment of greenhouse gas (GHG) monitoring stations around Africa. The network was optimised to reduce the uncertainty in emissions across three of the most important GHGs: CO2, CH4, and N2O. Optimal networks were derived using incremental optimisation of the percenta...
Research
During the first year of the project the cluster worked on the data service requirement tracking and a technology landscape and gap analysis on the RI FAIR data/services level, to provide an up-to-date investigation of the most common gaps the ENVRIs need to bridge with respect to the FAIR principles and the EOSC requirements. The FAIRness analysis...
Article
Full-text available
During the summer of 2018, a widespread drought developed over Northern and Central Europe. The increase in temperature and the reduction of soil moisture have influenced carbon dioxide (CO2) exchange between the atmosphere and terrestrial ecosystems in various ways, such as a reduction of photosynthesis, changes in ecosystem respiration, or allowi...
Article
The World Meteorological Organization has developed a set of headline indicators for global climate monitoring. These seven indicators are a subset of the existing set of essential climate variables (ECVs) established by the Global Climate Observing System and are intended to provide the most essential parameters representing the state of the clima...
Chapter
Full-text available
Environmental research infrastructures are often built on a large number of distributed observational or experimental sites, run by hundreds of scientists and technicians, financially supported and administrated by a large number of institutions. It becomes very important to acknowledge the data sources and their providers. There is also a strong n...
Chapter
Full-text available
Answering the key challenges for society due to environmental issues like climate change, pollution and loss of biodiversity, and making the right decisions to tackle these in a cost-efficient and sustainable way requires scientific understanding of the Earth System. This scientific knowledge can then be used to inform the general public and policy...
Article
Full-text available
In order to effectively tackle the on-going changes in global climate, stakeholders and policy makers across the globe need timely and accurate information they can trust on a wide range of topics. Here we briefly describe how observational data on greenhouse gas concentrations collected from the ICOS network of measurement stations in Europe is tr...
Preprint
Full-text available
Abstract. Atmospheric inversions have been used for the past two decades to derive large scale constraints on the sources and sinks of CO<sub>2</sub> into the atmosphere. The development of high density in-situ surface observation networks, such as ICOS in Europe, enables in theory inversions at a resolution close to the country scale in Europe. Th...
Article
Full-text available
Climate change mitigation efforts require information on the current greenhouse gas atmospheric concentrations and their sources and sinks. Carbon dioxide (CO2) is the most abundant anthropogenic greenhouse gas. Its variability in the atmosphere is modulated by the synergy between weather and CO2 surface fluxes, often referred to as CO2 weather. It...
Article
Full-text available
Climate change mitigation efforts require information on the current greenhouse gas atmospheric concentrations and their sources and sinks. Carbon dioxide (CO2) is the most abundant anthropogenic greenhouse gas. Its variability in the atmosphere is modulated by the synergy between weather and CO2 surface fluxes, often referred to as CO2 weather. It...
Technical Report
Full-text available
In line with the SEACRIFOG WP4 objective of improving technical harmonisation and data quality in environmental monitoring and experimentation, this report presents the requirements for observations of the essential variables identified by SEACRIFOG and derived data products. Existing observation infrastructures and data products are then assessed...
Article
Full-text available
There is currently a lack of representative, systematic and harmonised greenhouse gas (GHG) observations covering the variety of natural and human-altered biomes that occur in Africa. This impedes the long-term assessment of the drivers of climate change, in addition to their impacts and feedback loops at the continental scale, but also limits our...
Poster
Full-text available
Climate change is threatening ecosystems and societies in Africa. At the same time, population growth causing land-use change, increased energy demand and the development of industry and transport infrastructure contributes to increasing greenhouse gas (GHG) emissions. It is estimated that the majority of GHG emissions in Africa at present occur du...
Poster
Full-text available
EUROCOM is a Franco-Swedish project aims to exploit the dense atmospheric observation network over Europe, by performing mesoscale atmospheric inversions over the period 2006-2015, and to foster collaboration between European scale inverse modellers. This will improve our understanding of estimates of the CO2 system at continental and regional scal...
Poster
Full-text available
Ecosystems and societies on the African continent are threatened by the consequences of climate change. Similarly, the continuing trend of population growth jointly occurring with rapid land-use change, increased energy demand and the development of industry and transport infrastructure contribute to increasing greenhouse gas (GHG) emissions and su...
Article
Full-text available
Methane emissions on the national scale in France in 2012 are inferred by assimilating continuous atmospheric mixing ratio measurements from nine stations of the European network ICOS located in France and surrounding countries. To assess the robustness of the fluxes deduced by our inversion system based on an objectified quantification of uncertai...
Article
Full-text available
The inverse models infer total CH4 emissions of 26.8 (20.2–29.7) Tg CH4 yr−1 (mean, 10th and 90th percentiles from all inversions) for the EU-28 for 2006–2012 from the four inversion experiments. For comparison, total anthropogenic CH4 emissions reported to UNFCCC (bottom up, based on statistical data and emissions factors) amount to only 21.3 Tg C...
Article
Full-text available
Methane emissions at the national scale in France in 2012 are inferred by assimilating continuous atmospheric mixing ratio measurements from nine stations of the European network ICOS located in France and surrounding countries. To assess the robustness of the fluxes deduced by our inversion system based on an objectified quantification of uncertai...
Conference Paper
Full-text available
Molecular hydrogen (H2), though not toxic or a greenhouse gas itself, may influence air quality and climate indirectly by affecting the atmosphere’s oxidative capacity. So as increased use of hydrogen fuel is expected, a better understanding of the global, regional and local atmospheric H2 cycles is needed. Studying the stable isotopic composition...
Conference Paper
Molecular hydrogen (H2), though not toxic or a greenhouse gas itself, may influence air quality and climate indirectly by affecting the atmosphere’s oxidative capacity. So as increased use of hydrogen fuel is expected, a better understanding of the global, regional and local atmospheric H2 cycles is needed. Studying the stable isotopic composition...
Article
We present inverse modelling (top-down) estimates of European methane (CH4) emissions for 2006–2012 based on a new quality-controlled and harmonized in-situ data set from 18 European atmospheric monitoring stations. We applied an ensemble of seven inverse models and performed four inversion experiments, investigating the impact of different sets of...
Article
Full-text available
We present inverse modelling (top-down) estimates of European methane (CH4) emissions for 2006–2012 based on a new quality-controlled and harmonized in-situ data set from 18 European atmospheric monitoring stations. We applied an ensemble of seven inverse models and performed four inversion experiments, investigating the impact of different sets of...
Article
Full-text available
Aerosol loss in air intake systems potentially hampers the application of one-filter systems for progeny-based atmospheric ²²²radon (²²²Rn) measurements. The artefacts are significant when air has to be collected via long sampling lines, e.g. from elevated heights at tall tower observatories. Here we present results from a study, determining ²²²Rn...
Article
Full-text available
Although atmospheric ²²²radon (²²²Rn) activity concentration measurements are currently performed worldwide, they are being made by many different laboratories and with fundamentally different measurement principles, so compatibility issues can limit their utility for regional-to-global applications. Consequently, we conducted a European-wide ²²²Rn...
Poster
Full-text available
In a world that is undergoing climate change and is increasingly impacted by human influence, the need for globally integrated observations of greenhouse gases (GHG) and independent evaluation of their fluxes is becoming increasingly pressing. Since the 2015 COP21 meeting in Paris, such observation systems are also demanded by global stakeholders a...
Article
Full-text available
Download this Open Access paper: http://www.sciencedirect.com/science/article/pii/S1352231016307762 PLEASE NOTE: A previous version of this article contained graphics with low image resolution. This problem is now fixed. The new version with high-quality graphics can now be downloaded from the AtmosEnv link above. Download associated dataset: htt...
Conference Paper
Full-text available
This paper describes the implementation of (near) real-time (NRT) data processing in the recently launched European environmental research infrastructure ICOS. NRT applications include handling of raw sensor data (including safe storage and quality control), processing and evaluation of greenhouse gas mixing ratios and exchange fluxes, and the prov...
Article
Full-text available
A new methodology is presented to estimate regional-scale surface fluxes of 222Rn. 222Rn is an increasingly important trace gas which is used to calculate regional-scale greenhouse gas emissions and to validate atmospheric transport models. We tested our method at two atmospheric research stations in the Netherlands and compared our results with me...
Article
Full-text available
We present a new methodology, which we call Single Pair of Observations Technique with Eddy Covariance (SPOT-EC), to estimate regional-scale surface fluxes of 222Rn from tower-based observations of 222Rn activity concentration, CO2 mole fractions and direct CO2 flux measurements from eddy covariance. For specific events, the regional (222Rn) surfac...
Article
We evaluate the capability of the global atmospheric transport model TM5 to simulate the boundary layer dynamics and associated variability of trace gases close to the surface, using radon (222Rn). Focusing on the European scale, we compare the boundary layer height (BLH) in the TM5 model with observations from the National Oceanic and Atmospheric...
Article
Full-text available
A European-wide 222Radon/222Radon progeny comparison study has been conducted in order to determine correction factors that could be applied to existing atmospheric 222Radon data sets for quantitative use of this tracer in atmospheric transport model validation. Two compact and easy-to-transport Heidelberg Radon Monitors (HRM) were moved around to...
Article
In the atmosphere night time removal of volatile organic compounds (VOC) is initiated to a large extent by reaction with the nitrate radical (NO3) forming organic nitrates which partition between gas and particulate phase. Here we show based on particle phase measurements performed at a suburban site in the Netherlands that organic nitrates contrib...
Article
Full-text available
Aerosol loss in air intake systems potentially hampers the application of one-filter systems for progeny-based atmospheric 222Radon (222Rn) measurements. The artefacts are significant when air has to be collected via long sampling lines, e.g. from elevated heights at tall tower observatories. Here we present results from a study, determining 222Rn...
Article
Full-text available
We present a new methodology, which we call Single Pair of Observations Technique with Eddy Covariance (SPOT- EC), to estimate regional scale surface fluxes of 222Radon (222Rn) from tower-based observations of 222Rn activity, CO2 mole fractions and direct CO2 flux measurements from eddy covariance. For specific events, the regional (222Rn) surface...
Article
Full-text available
We evaluate the capability of the global atmospheric transport model TM5 to reproduce observations of the boundary layer dynamics and the associated variability of trace gases close to the surface, using radon (222Rn), which is an excellent tracer for vertical mixing owing to its short lifetime (half-life) of 3.82 days. Focusing on the European sca...
Data
Measurements of the stable isotopic composition (dD(H2) or dD) of atmospheric molecular hydrogen (H2) are a useful addition to mixing ratio (X(H2)) measurements for understanding the atmospheric H2 cycle. dD datasets published so far consist mostly of observations at background locations. We complement these with observations from the Cabauw tall t...
Article
Full-text available
In this study, the spatial representativeness of eddy covariance (EC) methane (CH 4) measurements was examined by comparing parallel CH 4 fluxes from three short (6 m) towers separated by a few kilometres and from two higher levels (20 m and 60 m) at one location. The measurement campaign was held on an intensively managed grassland on peat soil in...
Conference Paper
Full-text available
Meanwhile, this material has been published as a journal article on http://www.sciencedirect.com/science/article/pii/S1352231016307762