About
240
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Introduction
My research topics:
(1) Copernicus Atmosphere Service, http://atmosphere.copernicus.eu
(2) Development of air quality prediction systems for the Netherlands and Europe.
(3) Satellite observations: Nitrogen dioxide measured by the OMI and TROPOMI satellite instruments.
(4) Merging those observations with atmospheric models: data assimilation, OSSE, sentinels 4 and 5.
Additional affiliations
January 1997 - present
January 1995 - December 1996
January 1988 - December 1992
Publications
Publications (240)
The aim of this paper is to highlight how TROPOspheric Monitoring Instrument (TROPOMI) trace gas data can best be used and interpreted to understand event-based impacts on air quality from regional to city scales around the globe. For this study, we present the observed changes in the atmospheric column amounts of five trace gases (NO2, SO2, CO, HC...
Nitrogen oxides (NOx) are air pollutants critical to ozone and fine particle production in the troposphere. Here, we present fuel‐based emission inventories updated to 2018, including for mobile source engines using the Fuel‐based Inventory of Vehicle Emissions (FIVEs) and oil and gas production using the Fuel‐based Oil and Gas (FOG) inventory. The...
This paper reports on consolidated ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by the TROPOspheric Monitoring Instrument (TROPOMI) on board of the ESA/EU Copernicus Sentinel-5 Precursor (S5P) satellite. Tropospheric, stratospheric, and total NO2 column data from S5P are compared to correlative...
The global fire emission inventories depend on ground and airborne measurements of species-specific emission factors (EFs), which translate dry matter losses due to fires to actual trace gas and aerosol emissions. The EFs of nitrogen oxides (NOx) and carbon monoxide (CO) can function as a proxy for combustion efficiency to distinguish flaming from...
New high quality satellite measurements of nitrogen dioxide (NO2) of the TROPOspheric Monitoring Instrument (TROPOMI) over snow-covered regions of Siberia reveal previously undocumented but significant NO2 emissions associated with the natural gas industry in Western Siberia. Besides gas drilling and natural gas power plants, also gas compressor st...
Airborne and ground-based Pandora spectrometer NO2 column measurements were collected during the 2018 Long Island Sound Tropospheric Ozone Study (LISTOS) in the New York City/Long Island Sound region, which coincided with early observations from the Sentinel-5P TROPOspheric Monitoring Instrument (TROPOMI) instrument. Both airborne- and ground-based...
Plain Language Summary
During the COVID‐19 lockdown in China, air quality had strongly improved. Here we study what sources were reduced and how much the reduction per city was. We used TROPOMI observations of the Sentinel‐5P satellite, which monitors the Earth's atmosphere daily. We focused on observations of the pollutant “nitrogen dioxide,” an i...
Na publicatie van zijn eerste adviesrapport op 5 maart 2020 brengt het Adviescollege Meten en Berekenen Stikstof nu zijn eindrapport naar buiten. Taak van het adviescollege was om te beoordelen of de huidige meet- en rekensystematiek voor stikstofemissie en -depositie voldoende wetenschappelijke onderbouwing biedt voor het stikstofbeleid. In de eer...
Spaceborne NO2 column observations from two high-resolution instruments, Tropospheric Monitoring Instrument (TROPOMI) on board Sentinel-5 Precursor and Ozone Monitoring Instrument (OMI) on Aura, reveal unprecedented NO2 decreases over China, South Korea, western Europe, and the United States as a result of public health measures enforced to contain...
Abstract. This paper reports on consolidated ground-based validation results of the atmospheric NO<sub>2</sub> data produced operationally since April 2018 by the TROPOMI instrument on board of the ESA/EU Copernicus Sentinel-5 Precursor (S5p) satellite. Tropospheric, stratospheric, and total NO<sub>2</sub> column data from S5p are compared to corre...
Abstract. Abundant NO<sub>2</sub> column measurements from airborne and ground-based Pandora spectrometers were collected as part of the 2018 Long Island Sound Tropospheric Ozone Study (LISTOS) in the New York City/Long Island Sound region and coincided with early measurements from the Sentinel-5P TROPOMI instrument. Both airborne- and ground-based...
Abstract. The global fire emission inventories depend on ground and airborne measurements of species-specific emission factors (EFs), which translate dry matter losses due to fires to actual trace gas and aerosol emissions. The EFs of nitrogen oxides (NO<sub>x</sub>) and carbon monoxide (CO) can function as a proxy for combustion efficiency to dist...
Het Adviescollege Meten en Berekenen Stikstof is in december 2019 begonnen aan
de eerste fase van zijn opdracht om advies te geven over de wetenschappelijke kwaliteit van de Nederlandse systematiek voor het meten van en rekenen aan stikstofverbindingen ter onderbouwing van het (toekomstig) beleid van de Rijksoverheid en provincies. Het uitgangspunt...
Nitrogen dioxide (NO2) is a regulated air pollutant that is of particular concern in many cities, where concentrations are high. Emissions of nitrogen oxides to the atmosphere lead to the formation of ozone and particulate matter, with adverse impacts on human health and ecosystems. The effects of emissions are often assessed through modeling based...
In this work, a ∼21-year global dataset from four different satellite sensors with a mid-morning overpass (GOME/ERS-2, SCIAMACHY/ENVISAT, GOME-2/Metop-A, and GOME-2/Metop-B) is compiled to study the long-term tropospheric NO2 patterns and trends. The Global Ozone Monitoring Experiment (GOME) and GOME-2 data are “corrected” relative to the SCanning...
Global multiconstituent concentration and emission fields obtained from the assimilation of the satellite retrievals of ozone, CO, NO2, HNO3, and SO2 from the Ozone Monitoring Instrument (OMI), Global Ozone Monitoring Experiment 2, Measurements of Pollution in the Troposphere, Microwave Limb Sounder, and Atmospheric Infrared Sounder (AIRS)/OMI are...
Global observations of tropospheric nitrogen dioxide (NO2) columns have been shown to be feasible from space, but consistent multi-sensor records do not yet exist, nor are they covered by planned activities at the international level. Harmonised, multi-decadal records of NO2 columns and their associated uncertainties can provide crucial information...
In this work, a ~21-years self-consistent global dataset from four different satellite sensors with a mid-morning overpass (GOME/ERS-2, SCIAMACHY/ENVISAT, GOME-2/Metop-A and GOME-2/Metop-B) is compiled to study the long-term tropospheric NO2 patterns and trends. The GOME and GOME-2 data are corrected relative to the SCIAMACHY data in order to repro...
Global observations of tropospheric nitrogen dioxide (NO2) columns have been shown to be feasible from space, but consistent multi-sensor records do not yet exist, nor are they covered by planned activities on the international level. Harmonised, multi-decadal records of NO2 columns and their associated uncertainties can provide crucial information...
Nitrogen dioxide (NO2) and formaldehyde (HCHO) column data from satellite instruments are used for air quality and climate studies. Both NO2 and HCHO have been identified as precursors to the ozone (O3) and aerosol essential climate variables, and it is essential to quantify and characterise their uncertainties. Here we present an intercomparison o...
Air mass factor (AMF) calculation is the largest source of uncertainty in NO2 and HCHO satellite retrievals in situations with enhanced trace gas concentrations in the lower troposphere. Structural uncertainty arises when different retrieval methodologies are applied within the scientific community to the same satellite observations. Here, we addre...
This study examines the adequacy of the existing Brewer network to supplement other networks from the ground and space to detect SO2 plumes of volcanic origin. It was found that large volcanic eruptions of the last decade in the Northern Hemisphere have a positive columnar SO2 signal seen by the Brewer instruments located under the plume. It is sho...
Abstract. We present a model description and benchmark evaluation of an extension of the tropospheric chemistry module in the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF) with stratospheric chemistry, referred to as C-IFS-CB05-BASCOE (for brevity here referred to as C-IFS-TS). The stratospher...
A variant of the limb–nadir matching technique for deriving tropospheric NO2 columns is presented in which the stratospheric component of the NO2 slant column density (SCD) measured by the Ozone Monitoring Instrument (OMI) is removed using non-coincident profiles from the Optical Spectrograph and InfraRed Imaging System (OSIRIS). In order to correc...
This paper demonstrates that SO2 columnar amounts have significantly increased following the five largest volcanic eruptions of the past decade in the Northern Hemisphere. A strong positive signal was detected by all the existing networks either ground based (Brewer, EARLINET, AirBase) or from satellites (OMI, GOME-2). The study particularly examin...
Global surface emissions of nitrogen oxides (NOx) over a ten-year period (2005–2014) are estimated from an assimilation of multiple satellite datasets: tropospheric NO2 columns from OMI, GOME-2, and SCIAMACHY; O3 profiles from TES; CO profiles from MOPITT; and O3 and HNO3 profiles from MLS using an ensemble Kalman filter technique. Chemical concent...
A variant of the limb-nadir matching technique for deriving tropospheric NO2 columns is presented in which the stratospheric component of the NO2 slant column density (SCD) measured by the Ozone Monitoring Instrument (OMI) is removed using non-coincident profiles from the Optical Spectrograph and InfraRed Imaging System (OSIRIS). In order to correc...
We present a model description and benchmark evaluation of an extension of the tropospheric chemistry module in the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF) with stratospheric chemistry, referred to as C-IFS-CB05-BASCOE (for brevity here referred to as C-IFS-TS). The stratospheric chemist...
Ultraviolet–visible (UV–Vis) satellite retrievals of trace gas columns of nitrogen dioxide
(NO2), sulfur dioxide (SO2), and formaldehyde (HCHO) are useful to
test and improve models of atmospheric composition, for data assimilation,
air quality hindcasting and forecasting, and to provide top-down constraints
on emissions. However, because models an...
We use the technique of Observing System Simulation Experiments (OSSEs) to quantify the impact of spaceborne carbon monoxide (CO) total column observations from the Sentinel-5 Precursor (S-5P) platform on tropospheric analyses and forecasts. We focus on Europe for the period of northern summer 2003, when there was a severe heat wave episode associa...
p>A variant of the limb-nadir matching technique for deriving tropospheric NO<sub>2</sub> columns is presented in which the stratospheric component of the NO<sub>2</sub> slant column density (SCD) measured by the Ozone Monitoring Instrument (OMI) is removed using non-coincident profiles from the Optical Spectrograph and InfraRed Imaging System (OSI...
MOZAIC-IAGOS data are used to assess the ability of the MACC reanalysis (REAN) to reproduce distributions of ozone (O-3) and carbon monoxide (CO), along with vertical and inter-annual variability in the upper troposphere/lower stratosphere region (UTLS) over Europe for the period 2003-2010. A control run (CNTRL, without assimilation) is compared wi...
![Figure 2. Modified normalised mean biases (MNMBs) [%] derived from the...](publication/307788076/figure/fig2/AS:614186757414915@1523444942419/Modified-normalised-mean-biases-MNMBs-derived-from-the-evaluation-of-the_Q320.jpg)
The Monitoring Atmospheric Composition and Climate (MACC) project
represents
the European Union's Copernicus Atmosphere Monitoring Service (CAMS)
(http://www.copernicus.eu/), which became fully operational during
2015. The global near-real-time MACC model production run for aerosol and
reactive gases provides daily analyses and 5-day forecasts of a...
The European MACC (Monitoring Atmospheric Composition and Climate) project is
preparing the operational Copernicus Atmosphere Monitoring Service (CAMS),
one of the services of the European Copernicus Programme on Earth observation
and environmental services. MACC uses data assimilation to combine in situ
and remote sensing observations with global...
UV/Vis satellite retrievals of trace gas columns of nitrogen dioxide (NO2), sulphur dioxide (SO2), and formaldehyde (HCHO) are useful to test and improve models of atmospheric composition, for data assimilation, air quality hindcasting and forecasting, and to provide top-down constraints on emissions. However, because models and satellite measureme...
This paper describes the pre-operational analysis and forecasting system
developed during MACC (Monitoring Atmospheric Composition and Climate) and
continued in the MACC-II (Monitoring Atmospheric Composition and Climate:
Interim Implementation) European projects to provide air quality services
for the European continent. This system is based on se...
We present the results from an 8-year tropospheric chemistry
reanalysis for the period 2005–2012 obtained by assimilating
multiple data sets from the OMI, MLS, TES, and MOPITT
satellite instruments. The reanalysis calculation was conducted
using a global chemical transport model and an ensemble Kalman
filter technique that simultaneously optimises...
The ozone multi-sensor reanalysis (MSR) is a multi-decadal ozone column data
record constructed using all available ozone column satellite data sets,
surface Brewer and Dobson observations and a data assimilation technique
with detailed error modelling. The result is a high-resolution time series
of 6-hourly global ozone column fields and forecast...
This work is an extended evaluation of near-surface ozone as part of the
global reanalysis of atmospheric composition, produced within the
European-funded project MACC (Monitoring Atmospheric Composition and
Climate). It includes an evaluation over the period 2003–2012 and provides
an overall assessment of the modeling system performance with respe...
The MACC III (Modelling Atmospheric Composition and Climate, www.copernicus‐atmosphere.eu) project is establishing the core global and regional atmospheric environmental service delivered as a component of the European Earth observation programme Copernicus. The global MACC near-‐real time (NRT) service provides daily analyses and forecasts of tra...
BASCOE, operated by BIRA-IASB, is used for the MACC-III project to assimilate the offline observations of stratospheric composition by Aura-MLS. The system performance and operational implementation are described in the companion deliverable D20.2 and D21.1. Its results and usage are reported in the deliverables D19.2, D21.6 and D23.3. Here the qua...
The MACC III (Monitoring Atmospheric Composition and Climate III, http://www.copernicus-atmosphere.eu) project is establishing the core global and regional atmospheric environmental service delivered as a component of the European Earth observation programme Copernicus. The MACC global near-real time (NRT) service provides daily analyses and forec...
Data assimilation is used in atmospheric chemistry models to improve air
quality forecasts, construct re-analyses of three-dimensional chemical
(including aerosol) concentrations and perform inverse modeling of input
variables or model parameters (e.g., emissions). Coupled chemistry
meteorology models (CCMM) are atmospheric chemistry models that si...
Daily global analyses and 5-day forecasts are generated in the context of
the European Monitoring Atmospheric Composition and Climate (MACC) project
using an extended version of the Integrated Forecasting System (IFS) of the
European Centre for Medium-Range Weather Forecasts (ECMWF). The IFS now
includes modules for chemistry, deposition and emissi...
This review paper provides a framework for the application of the Observing System Simulation Experiment (OSSE) methodology to satellite observations of atmospheric constituents relevant for air quality. The OSSEs are experiments used to determine the potential benefit of future observing systems using an existing monitoring or forecasting system a...
We present the results from an eight-year tropospheric chemistry reanalysis for the period 2005–2012 obtained by assimilating multiple retrieval data sets from the OMI, MLS, TES, and MOPITT satellite instruments. The reanalysis calculation was conducted using a global chemical transport model and an ensemble Kalman filter technique that simultaneou...
The ozone multi-sensor reanalysis (MSR) is a multi-decadal ozone column data record constructed using all available ozone column satellite datasets, surface Brewer and Dobson observations and a data assimilation technique with detailed error modelling. The result is a high-resolution time series of 6 hourly global ozone column fields and forecast e...
We derive a global climatology of tropospheric NO2 profiles from OMI cloudy observations for the year 2006 using the cloud slicing method on six pressure levels centered at about 280, 380, 500, 620, 720 and 820 hPa. A comparison between OMI and the TM4 model tropospheric NO2 profiles reveals striking overall similarities, which confer great confide...
The MACC III (Monitoring Atmospheric Composition and Climate III, http://www.copernicus-atmosphere.eu) project is establishing the core global and regional atmospheric environmental service delivered as a component of the European Earth observation programme Copernicus. The MACC global near-real time (NRT) service provides daily analyses and foreca...
Monitoring Atmospheric Composition and Climate (MACC/MACCII) currently represents the European Union's Copernicus Atmosphere Monitoring Service (CAMS) (http://www.copernicus.eu), which will become fully operational in the course of 2015. The global near-real-time MACC model production run for aerosol and reactive gases provides daily analyses and 5...
This paper evaluates and discusses the quality of the stratospheric ozone
analyses delivered in near real time by the MACC (Monitoring
Atmospheric Composition and Climate) project during the 3-year
period between September 2009 and September 2012. Ozone analyses
produced by four different chemical data assimilation (CDA) systems
are examined and co...
