A5050186411- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Ionosphere and magnetosphere dynamics
- Spectroscopy and Laser Applications
- Bat Biology and Ecology Studies
- Vehicle emissions and performance
- Air Quality Monitoring and Forecasting
- Air Traffic Management and Optimization
- Mercury impact and mitigation studies
- Advanced Aircraft Design and Technologies
- Climate variability and models
- Wildlife Ecology and Conservation
- Meteorological Phenomena and Simulations
- Animal Ecology and Behavior Studies
- Toxic Organic Pollutants Impact
- Water Quality Monitoring and Analysis
- Catalytic Processes in Materials Science
- Marine animal studies overview
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- COVID-19 impact on air quality
- Evolution and Paleontology Studies
Karlsruhe Institute of Technology
2016-2025
Ludwig-Maximilians-Universität München
2004-2025
University of Bristol
2023-2024
Kentucky imaging Technologies (United States)
2023-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2024
Elisabeth-Krankenhaus Essen
2022
Association des Operateurs Postaux Publics Europeens
2020
Enviscope (Germany)
2020
Lund University
2016
Essen University Hospital
2015
Abstract. Three types of reference simulations, as recommended by the Chemistry–Climate Model Initiative (CCMI), have been performed with version 2.51 European Centre for Medium-Range Weather Forecasts – Hamburg (ECHAM)/Modular Earth Submodel System (MESSy) Atmospheric Chemistry (EMAC) model: hindcast simulations (1950–2011), specified dynamics (1979–2013), i.e. nudged towards ERA-Interim reanalysis data, and combined projection (1950–2100). The manuscript summarizes updates model system...
Abstract. An airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard Boeing 767-300 ER LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft Regular Investigation the Atmosphere Based an Instrument Container, http://www.caribic-atmospheric.com). Subsequently more advanced system has been developed, using larger capacity additional equipment improved inlet...
The European Research Infrastructure IAGOS (In-service Aircraft for a Global Observing System) operates global-scale monitoring system atmospheric trace gases, aerosols and clouds utilising the existing global civil aircraft. This new infrastructure builds on heritage of former research projects MOZAIC (Measurement Ozone Water Vapour Airbus In-service Aircraft) CARIBIC (Civil Regular Investigation Atmosphere Based an Instrument Container). continues within acts as important airborne...
Abstract The Midlatitude Cirrus experiment (ML-CIRRUS) deployed the High Altitude and Long Range Research Aircraft (HALO) to obtain new insights into nucleation, life cycle, climate impact of natural cirrus aircraft-induced contrail cirrus. Direct observations properties their variability are still incomplete, currently limiting our understanding clouds’ on climate. Also, dynamical effects clouds feedbacks not adequately represented in today’s weather prediction models. Here, we present...
Wildfires inject large amounts of black carbon (BC) particles into the atmosphere, which can reach lowermost stratosphere (LMS) and cause strong radiative forcing. During a 14-month period observations on board passenger aircraft flying between Europe North America, we found frequent widespread biomass burning (BB) plumes, influencing 16 160 flight hours in LMS. The average BC mass concentrations these plumes (∼140 ng·m −3 , standard temperature pressure) were over 20 times higher than...
Air pollution is growing fastest in monsoon-affected South Asia. During the dry winter monsoon, fumes disperse toward Indian Ocean, creating a vast haze, but their fate during wet summer monsoon has been unclear. We performed atmospheric chemistry measurements by aircraft Oxidation Mechanism Observations campaign, sampling outflow upper troposphere between Mediterranean and Ocean. The measurements, supported model calculations, show that sustains remarkably efficient cleansing mechanism...
Abstract During spring 2020, the COVID-19 pandemic caused massive reductions in emissions from industry and ground airborne transportation. To explore resulting atmospheric composition changes, we conducted BLUESKY campaign with two research aircraft measured trace gases, aerosols, cloud properties boundary layer to lower stratosphere. From 16 May 9 June performed 20 flights early lockdown phase over Europe Atlantic Ocean. We found up 50% nitrogen dioxide concentrations urban areas GOME-2B...
Abstract. A commercially available dry chemiluminescence (CI) instrument for fast and precise measurement of ozone (O3) is specified. The sensitivity ~9000 counts s−1 per ppbv ozone. Its precision entirely determined by the number photons reaching detector (being a photomultiplier), i.e. quantum-noise limited. relative (ΔO3/O3 in %) thus follows Poisson statistics scales with square root frequency f inverse O3 mixing ratio: ΔO3/O3 ∝ f0.5 · O3−0.5. At typical ratios between 10 100 (and 1...
Abstract Despite their potential to slow global warming, until recently, the radiative forcing associated with volcanic aerosols in lowermost stratosphere (LMS) had not been considered. Here we study aerosol changes using lidar measurements from NASA CALIPSO satellite and aircraft IAGOS-CARIBIC observatory. Between 2008 2012 volcanism frequently affected Northern Hemisphere loadings, whereas Southern generally loadings close background conditions. We show that half of stratospheric optical...
Abstract. Enhanced tropospheric trace gases such as CO, CH4 and H2O reduced stratospheric O3 were measured in situ the lowermost stratosphere over northern Europe on 26 September 2012 during TACTS aircraft campaign. The measurements indicate that these air masses clearly differ from background. calculation of 40-day backward trajectories with trajectory module CLaMS model shows are affected by Asian monsoon anticyclone. Some originate boundary layer Southeast Asia/West Pacific rapidly lifted...
Abstract. Emissions of volatile organic compounds (VOCs) associated with oil and natural gas production in the Uintah Basin, Utah were measured at a ground site Horse Pool from NOAA mobile laboratory PTR-MS instruments. The VOC compositions vicinity individual wells other point sources such as evaporation ponds, compressor stations injection are compared to measurements Pool. High mixing ratios aromatics, alkanes, cycloalkanes methanol observed for extended periods time short-term spikes...
The WeCare project (Utilizing Weather information for Climate efficient and eco future aviation), an internal of the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR), aimed at finding solutions reducing climate impact aviation based on improved understanding atmospheric from by making use measurements modeling approaches. made some important contributions to advance scientific in area air transportation research. We characterize contrail properties, show that aircraft...
Abstract. Global simulations with the Chemical Lagrangian Model of Stratosphere (CLaMS) using artificial tracers air mass origin are used to analyze transport mechanisms from Asian monsoon region into lower stratosphere. In a case study, masses anticyclone originating in India/China by an eastward-migrating which broke off main on 20 September 2012 and filaments separated at northeastern flank analyzed. Enhanced contributions young (younger than 5 months) found within confined top thermal...
Changes in tropical wetland, ruminant or rice emissions are thought to have played a role recent variations atmospheric methane (CH4) concentrations. India has the world's largest population and produces ~ 20% of rice. Therefore, changes these sources could significant implications for global warming. Here, we infer India's CH4 period 2010-2015 using combination satellite, surface aircraft data. We apply high-resolution transport model simulate data from platforms fluxes at sub-national...
Abstract The Polar Stratosphere in a Changing Climate (POLSTRACC) mission employed the German High Altitude and Long Range Research Aircraft (HALO). payload comprised an innovative combination of remote sensing situ instruments. instruments provided high-resolution observations cirrus polar stratospheric clouds (PSCs), large number reactive long-lived trace gases, temperature at aircraft level. Information above underneath level was achieved by as well dropsondes. took place from 8 December...
Abstract. We analyse aerosol particle composition measurements from five research missions between 2014 and 2018 to assess the meridional extent of particles containing meteoric material in upper troposphere lower stratosphere (UTLS). Measurements Jungfraujoch mountaintop site a low-altitude aircraft mission show that is also present within middle- lower-tropospheric but only very small proportion particles. For both UTLS campaigns lower- mid-troposphere observations, were conducted with...
Abstract. Megacities and other major population centres (MPCs) worldwide are sources of air pollution, both locally as well downwind. The overall assessment prediction the impact MPC pollution on tropospheric chemistry challenging. present work provides an overview highlights a new contribution to understanding this issue based data analysis EMeRGe (Effect transport transformation pollutants Regional Global scales) international project. focuses atmospheric chemistry, dynamics, local...
Abstract New particle formation (NPF) in the tropical upper troposphere is a globally important source of atmospheric aerosols 1–4 . It known to occur over Amazon basin, but nucleation mechanism and chemical precursors have yet be identified 2 Here we present comprehensive situ aircraft measurements showing that extremely low-volatile oxidation products isoprene, particularly certain organonitrates, drive NPF Amazonian troposphere. The organonitrates originate from OH-initiated isoprene...
Abstract. CARIBIC (Civil Aircraft for the Regular Investigation of atmosphere Based on an Instrument Container) is a long-term atmospheric measurement program based use comprehensive scientific instrument package aboard commercial passenger aircraft. In addition to real-time measurements, whole air sampling performed regularly at cruising altitudes in tropical middle troposphere and extra-tropical UT/LS region. Air samples are analyzed greenhouse gases, NMHCs, halocarbons, trace gas isotopic...
Abstract. We use the GEOS-Chem global 3-D model of atmospheric chemistry and transport an ensemble Kalman filter to simultaneously infer regional fluxes methane (CH4) carbon dioxide (CO2) directly from GOSAT retrievals XCH4 : XCO2, using sparse ground-based CH4 CO2 mole fraction data anchor ratio. This work builds on previously reported theory that takes into account (1) these ratios are less prone systematic error than either full-physics products or proxy products; (2) resulting...
Abstract. Large volcanic eruptions impact significantly on climate and lead to ozone depletion due injection of particles gases into the stratosphere where their residence times are long. In this composition aerosol is an important but inadequately studied factor. Samples volcanically influenced were collected following Kasatochi (Alaska), Sarychev (Russia) also during Eyjafjallajökull (Iceland) in period 2008–2010. Sampling was conducted by CARIBIC platform regular flights at altitude 10–12...
Abstract. The transport of air masses originating from the Asian monsoon anticyclone into extratropical upper troposphere and lower stratosphere (Ex-UTLS) above potential temperatures Θ = 380 K was identified during HALO aircraft mission TACTS in August September 2012. In situ measurements CO, O3 N2O flight 2 on 30 2012 show irreversible mixing aged stratospheric with younger (recently transported troposphere) ones within Ex-UTLS. Backward trajectories calculated trajectory module CLaMS...
Water vapour, relative humidity and temperature in the Northern Hemisphere extratropical upper troposphere/lowermost stratosphere (UT/LMS) of operational European Centre for Medium‐Range Weather Forecasts (ECMWF) analysis forecast system are compared with situ measurements from Civil Aircraft Regular Investigation atmosphere Based on an Instrument Container (CARIBIC) passenger aircraft flights between 2005 2012. Modelled observed temperatures found to be good agreement, a small tendency...
Nitrogen oxide (NO and NOy) measurements were performed onboard an in-service aircraft within the framework of CARIBIC (Civil Aircraft for Regular Investigation atmosphere Based on Instrument Container). A total 330 flights completed from May 2005 through April 2013 between Frankfurt/Germany destination airports in Canada, USA, Brazil, Venezuela, Chile, Argentina, Colombia, South Africa, China, Korea, Japan, India, Thailand, Philippines. Different regions show differing NO NOy mixing ratios....
Abstract. The In-service Aircraft for a Global Observing System (IAGOS) is European research infrastructure that equips the Airbus A340/330 with system monitoring atmospheric composition. IAGOS instruments have three different configurations: IAGOS-Core, – Measurement of Ozone and Water Vapor by In Service (IAGOS-MOZAIC) Civil Regular Investigation atmosphere Based on an Instrument Container (IAGOS-CARIBIC). Since 1994, there been total 17 aircraft equipped. this study, we perform...