A5046098789- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Spectroscopy and Laser Applications
- Ionosphere and magnetosphere dynamics
- Water Quality Monitoring and Analysis
- Vehicle emissions and performance
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
- Marine and coastal ecosystems
- Fire effects on ecosystems
- Industrial Gas Emission Control
- Advanced Aircraft Design and Technologies
- Spacecraft Design and Technology
- Lightning and Electromagnetic Phenomena
- Satellite Image Processing and Photogrammetry
- Impact of Light on Environment and Health
- COVID-19 impact on air quality
- Maritime Navigation and Safety
- Methane Hydrates and Related Phenomena
- Conferences and Exhibitions Management
- Travel-related health issues
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2014-2024
European Organisation for the Exploitation of Meteorological Satellites
2024
National Space Agency
2015
Royal Netherlands Meteorological Institute
2000-2004
National Institute for Public Health and the Environment
1999
Delft University of Technology
1995
Abstract. In October 2017, the Sentinel-5 Precursor (S5P) mission was launched, carrying TROPOspheric Monitoring Instrument (TROPOMI), which provides a daily global coverage at spatial resolution as high 7 km × 3.5 and is expected to extend European atmospheric composition record initiated with GOME/ERS-2 in 1995, enhancing our scientific knowledge of processes its unprecedented resolution. Due ongoing need understand monitor recovery ozone layer, well evolution tropospheric pollution, total...
The Global Ozone Monitoring Instrument (GOME) was launched on European Space Agency's ERS‐2 platform in April 1995. GOME data processor (GDP) operational retrieval algorithm has generated total ozone columns since July In 2004 the GDP system given a major upgrade to version 4.0, new validation performed, and 10‐year level 1 record reprocessed. two papers, we describe 4.0 present an error budget sensitivity analysis (paper 1) of product overall accuracy entire 2). uses optimized differential...
Abstract. We present a new dataset of formaldehyde vertical columns retrieved from observations GOME-2 on board the EUMETSAT MetOp-A platform between 2007 and 2011. The retrieval scheme, which has been optimised for GOME-2, includes two-step fitting procedure that strongly reduces impact spectral interferences H2CO BrO, modified DOAS approach better handles ozone absorption effects at moderately low sun elevations. Owing to these features, noise in slant is reduced by up 40% comparison...
[1] The Global Ozone Monitoring Instrument (GOME-2) was launched on EUMESAT's MetOp-A satellite in October 2006. This paper is concerned with the retrieval algorithm GOME Data Processor (GDP) version 4.4 used by EUMETSAT Satellite Application Facility and Atmospheric Chemistry (O3M-SAF) for operational generation of GOME-2 total ozone products. GDP latest 4.0 algorithm, which employed official Level 2 other trace gas products from SCIAMACHY. Here we focus enhancements introduced 4.4:...
Abstract. This paper presents the algorithm for operational near real time retrieval of total and tropospheric NO2 columns from Global Ozone Monitoring Experiment (GOME-2). The is performed with GOME Data Processor (GDP) version 4.4 as used by EUMETSAT Satellite Application Facility on Atmospheric Chemistry (O3M-SAF). differential optical absorption spectroscopy (DOAS) method to determine slant GOME-2 (ir)radiance data in 425–450 nm range. Initial are computed using stratospheric air mass...
Abstract Retrievals of sulfur dioxide (SO 2 ) from space‐based spectrometers are in a relatively early stage development. Factors such as interference between ozone and SO the retrieval algorithms often lead to errors retrieved values. Measurements Ozone Monitoring Instrument (OMI), Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY), Global Experiment‐2 (GOME‐2) satellite sensors, averaged over period several years, were used identify locations with elevated...
The eruption of the Eyjafjallajökull volcano, Iceland, in April and May 2010 caused unprecedented disruptions European air traffic showing that timely monitoring volcanic ash SO 2 dispersion as well corresponding plume heights are important for aviation safety. This paper describes observations BrO columns determination height using GOME‐2 satellite instrument. During eruptive period 2010, total up to ∼20 DU ∼7.7 × 10 13 molec/cm were detected. BrO/SO ratio estimated from varies 1.1 −4 2.1 ....
Abstract. Volcanic eruptions emit plumes of ash and gases into the atmosphere, potentially at very high altitudes. Ash-rich are hazardous for airplanes as is abrasive easily melts inside their engines. With more than 50 active volcanoes per year ever-increasing number commercial flights, safety a real concern. Satellite measurements ideal monitoring global volcanic activity and, in combination with atmospheric dispersion models, to track forecast plumes. Here we present Support Aviation...
Abstract. This paper assesses the quality of IASI (Infrared Atmospheric Sounding Interferometer)/Metop-A (IASI-A) and IASI/Metop-B (IASI-B) ozone (O3) products (total partial O3 columns) retrieved with Fast Optimal Retrievals on Layers for Ozone (FORLI-O3; v20151001) software 9 years (2008–July 2017) through an extensive intercomparison validation exercise using independent observations (satellite, ground-based ozonesonde). Compared previous version FORLI-O3 (v20140922), several improvements...
Abstract. Multi-axis differential optical absorption spectroscopy (MAX-DOAS) and direct sun NO2 vertical column network data are used to investigate the accuracy of tropospheric measurements GOME-2 instrument on MetOp-A satellite platform OMI Aura. The study is based 23 MAX-DOAS 16 instruments at stations distributed worldwide. A method quantify correct for horizontal dilution effects in heterogeneous field conditions proposed. After systematic application this correction urban sites, found...
In this paper, we present the estimation of surface NO2 concentrations over Germany using a machine learning approach. TROPOMI satellite observations tropospheric vertical column densities (VCDs) and several meteorological parameters are used to train neural network model for prediction concentrations. The is validated against ground-based in situ air quality monitoring measurements regional chemical transport (CTM) simulations. Neural show good agreement with monitor data Pearson...
Abstract A data‐assimilation scheme to assimilate the Global Ozone Monitoring Experiment (GOME) total‐ozone data is described. The corresponding software (called TM3DAM) has been operational since early 2000 and used produce daily ozone analyses five‐day forecasts. model a tracer‐transport with parametrized description of stratospheric gas‐phase heterogeneous chemistry. It driven by meteorological fields from ECMWF numerical weather‐prediction model. TM3DAM near‐real‐time level‐2 GOME...
Abstract. In preparation of the TROPOMI/S5P launch in early 2017, a tropospheric ozone retrieval based on convective cloud differential method was developed. For intensive tests we applied algorithm to total columns and data satellite instruments GOME, SCIAMACHY, OMI, GOME-2A GOME-2B. Thereby time series 20 years (1995–2015) column generated. To have consistent set for all sensors, one common algorithm, namely GODFITv3, L1 reflectances were also soft calibrated. The input into retrieval....
Abstract. The three Global Ozone Monitoring Experiment-2 instruments will provide unique and long data sets for atmospheric research applications. complete time period be 2007–2022, including the of ozone depletion as well beginning layer recovery. Besides chemistry, GOME-2 (Global Experiment-2) products are important e.g. air quality studies, climate modelling, policy monitoring hazard warnings. heritage is in ERS/GOME Envisat/SCIAMACHY instruments. current Level 2 (L2) cover a wide range...
Abstract. This paper presents an extensive intercomparison and validation for the ozone (O3) product measured by two Infrared Atmospheric Sounding Interferometers (IASIs) launched on board MetOp-A MetOp-B satellites in 2006 2012 respectively. IASI O3 total columns vertical profiles obtained from Fast Optimal Retrievals Layers (FORLI) v20140922 software (running up until recently) are validated against independent observations during period 2008–2014 a global scale. On average 2013–2014,...
Abstract. The TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel-5 Precursor (S5P) satellite launched in October 2017 yields a wealth of atmospheric composition data, including retrievals total column ozone (TCO3) that are provided near-real-time (NRT) and off-line. NRT TCO3 (v1.0.0–v1.1.2) have been included data assimilation system Copernicus Atmosphere Service (CAMS), tests to monitor carry out first experiments with them performed for period 26 November 30 2018. TROPOMI...
Abstract. Launched in October 2017, the TROPOspheric Monitoring Instrument (TROPOMI) aboard Sentinel-5 Precursor provides potential to monitor air quality over point sources across globe with a spatial resolution as high 5.5 km × 3.5 (7 before 6 August 2019). The DLR nitrogen dioxide (NO2) retrieval algorithm for TROPOMI instrument consists of three steps: spectral fitting slant column, separation stratospheric and tropospheric contributions, conversion column vertical using an mass factor...
Abstract. This paper describes a new ozone column retrieval algorithm and its application to SCIAMACHY measurements. The TOSOMI is based on the Differential Optical Absorption Spectroscopy (DOAS) technique implements several improvements over older algorithms. These include aspects like (i) explicit treatment of rotational Raman scattering, (ii) an improved air-mass factor formulation which simulation reflectivity spectrum subsequent DOAS fit this simulated spectrum, (iii) use climatology...
Satellite-based remote sensing measurements of volcanic sulfur dioxide (SO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) provide critical information for reducing hazards. This paper describes the use SO from thermal infrared sounder IASI and UV-VIS instrument GOME-2 in services related to aviation hazard early warning unrest. The high sensitivity both instruments allows detection global tracking eruption plumes makes them a valuable...
The atmospheric chemistry instrument Global Ozone Monitoring Experiment (GOME) was launched in April 1995 on the ERS‐2 platform. GOME data processor (GDP) operational retrieval algorithm has produced total ozone columns since July 1995. With a record of over ten years, become important for trend analysis. In 2004, GDP upgraded to version 4.0, new validation performed, and entire reprocessed. preceding paper (Van Roozendael et al., 2006), 4.0 described. this paper, we deal with geophysical...
During the World Exposition 2010 (Expo, from May to October), emission control measures were implemented in Shanghai and surrounding areas improve air quality. To evaluate effect of these measures, we use tropospheric NO2 column, aerosol optical thickness (AOT) CO concentration observations satellite instruments GOME-2, MODIS MOPITT, respectively. The analysis shows about 8% 14% reductions columns AOT respectively over during Expo period, compared past three years. A 12% reduction at 700 hPa...
Abstract Tropospheric ozone (O 3 ) columns in urban and rural regions as seen by the Infrared Atmospheric Sounding Interferometer (IASI) are analyzed along with Global Ozone Monitoring Experiment (GOME‐2) tropospheric nitrogen dioxide (NO 2 columns. Results over nine cities of Northern Hemisphere for period 2008–2011 show a typical seasonal behavior O , first maximum reached late spring because stratospheric intrusion mainly continuous rise till summer anthropogenic‐based production. Over...
Abstract. Knowledge of the total column water vapour (TCWV) global distribution is fundamental for climate analysis and weather monitoring. In this work, we present retrieval algorithm used to derive operational TCWV from GOME-2 sensors aboard EUMETSAT's MetOp-A MetOp-B satellites perform an extensive inter-comparison in order evaluate their consistency temporal stability. For analysis, data sets are generated by DLR framework EUMETSAT O3M-SAF project using GOME Data Processor (GDP) version...
Onboard the Chinese GaoFen-5 (GF5) satellite, Environmental trace gases Monitoring Instrument (EMI) is a nadir-viewing wide-field spectrometer that was launched on May 9, 2018. EMI measures back-scattered earthshine solar radiance in ultraviolet and visible spectral range. By using differential optical absorption spectrometry (DOAS) method measurements VIS1 band (405–465 nm), we performed retrievals of NO2. Some first retrieval results NO2 from comparison with OMI TROPOMI products are...