Christiane Voigt
A5056840259- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Advanced Aircraft Design and Technologies
- Air Quality and Health Impacts
- Vehicle emissions and performance
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Icing and De-icing Technologies
- Air Traffic Management and Optimization
- Climate variability and models
- Ionosphere and magnetosphere dynamics
- Air Quality Monitoring and Forecasting
- Gas Dynamics and Kinetic Theory
- Arctic and Antarctic ice dynamics
- Particle physics theoretical and experimental studies
- Geophysics and Gravity Measurements
- High-Energy Particle Collisions Research
- Rocket and propulsion systems research
- Cryospheric studies and observations
- Spectroscopy and Laser Applications
- COVID-19 impact on air quality
- Wind and Air Flow Studies
- Quantum Chromodynamics and Particle Interactions
Johannes Gutenberg University Mainz
2016-2025
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2025
Czech Academy of Sciences, Institute of Atmospheric Physics
2021-2024
Aerospace Center Hospital
2023
University of Applied Sciences Mainz
2021
Dienstleistungszentrum Ländlicher Raum
2020
Technische Universität Braunschweig
2019
Max Planck Institute for Chemistry
2014-2016
Max Planck Society
2000-2014
University of Wisconsin–Madison
2012
Abstract. Airborne lidar and in-situ measurements of aerosols trace gases were performed in volcanic ash plumes over Europe between Southern Germany Iceland with the Falcon aircraft during eruption period Eyjafjalla volcano 19 April 18 May 2010. Flight planning measurement analyses supported by a refined Meteosat product trajectory model analysis. The plume was observed directly up to distance 2700 km downwind, 120 h ages. Aged layers few 100 m 3 deep, occurred 1 7 altitude, typically 300...
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...
Abstract Between 1 September and 4 October 2014, a combined airborne ground-based measurement campaign was conducted to study tropical deep convective clouds over the Brazilian Amazon rain forest. The new German research aircraft, High Altitude Long Range Research Aircraft (HALO), modified Gulfstream G550, extensive instrumentation were deployed in near Manaus (State of Amazonas). part German–Brazilian Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by 1 or 2 orders of magnitude. The measurements were made during German–Brazilian cooperative aircraft campaign ACRIDICON–CHUVA, where ACRIDICON stands for Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics...
Abstract Contrail cirrus account for the major share of aviation’s climate impact. Yet, links between jet fuel composition, contrail microphysics and impact remain unresolved. Here we present unique observations from two DLR-NASA aircraft campaigns that measured exhaust characteristics an Airbus A320 burning either standard fuels or low aromatic sustainable aviation blends. Our results show soot particles can regulate number ice crystals current emission levels. We provide experimental...
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...
Sustainable aviation fuel (SAF) can reduce aviation's CO2 and non-CO2 impacts. We quantify the change in contrail properties climate forcing North Atlantic resulting from different blending ratios of SAF demonstrate that intelligently allocating limited supply could multiply its overall benefit by factors 9–15. A fleetwide adoption 100% increases occurrence (+5%), but lower nonvolatile particle emissions (−52%) annual mean net radiative (−44%), adding to gains reduced life cycle emissions....
Abstract. Around 5 % of anthropogenic radiative forcing (RF) is attributed to aviation CO2 and non-CO2 impacts. This paper quantifies emissions contrail climate in the North Atlantic, one world's busiest air traffic corridors, over years. Between 2016 2019, growth (+3.13 yr−1) nitrogen oxide (+4.5 outpaced increases flight distance (+3.05 yr−1). Over same period, annual mean cirrus net RF (204–280 mW m−2) showed significant inter-annual variability caused by variations meteorology. Responses...
Abstract. Powering aircraft by sustainable aviation fuels (SAFs) is a pathway to reduce the climate impact of lowering lifecycle CO2 emissions and reducing ice crystal numbers radiative forcing from contrails. While effect SAF blends on contrails has been measured previously, here we present novel measurements particle emission 100 % combustion. During ECLIF3 (Emission CLimate Impact alternative Fuels) campaign, collaboration between Deutsches Zentrum für Luft- und Raumfahrt (DLR), Airbus,...
A comprehensive investigation of polar stratospheric clouds was performed on 25 January 2000 with instruments onboard a balloon gondola flown from Kiruna, Sweden. Cloud layers were repeatedly encountered at altitudes between 20 and 24 kilometers over wide range atmospheric temperatures (185 to 197 kelvin). Particle composition analysis showed that large fraction the cloud composed nitric acid trihydrate (NAT) particles, containing water molar ratio 3:1; this confirmed these long-sought solid...
Abstract. A PSC was detected on 6 February 2003 in the Arctic stratosphere by in-situ measurements onboard high-altitude research aircraft Geophysica. Low number densities (~10-4cm-3) of small nitric acid (HNO3) containing particles (d<6µm) were observed at altitudes between 18 and 20km. Provided temperatures remain below NAT equilibrium temperature TNAT, these have potential to grow further remove HNO3 from stratosphere, thereby enhancing polar ozone loss. Interestingly, formed less than...
Abstract. During the CONCERT 2011 field experiment with DLR research aircraft Falcon, an enhanced aerosol layer particle linear depolarization ratios of 6–8% at 532 nm was observed altitudes above 10 km over northeast Germany on 16 September 2011. Dispersion simulations HYSPILT suggest that elevated originated from Pagami Creek forest fire in Minnesota, USA, which caused pyro-convective uplift particles and gases. The 3–4 day-old smoke plume had high total refractory black carbon (rBC) mass...
Abstract. Lineshaped contrails were detected with the research aircraft Falcon during CONCERT – CONtrail and Cirrus ExpeRimenT campaign in October/November 2008. The was equipped a set of instruments to measure particle size distribution, shape, extinction chemical composition as well trace gas mixing ratios sulfur dioxide (SO2), reactive nitrogen halogen species (NO, NOy, HNO3, HONO, HCl), ozone (O3) carbon monoxide (CO). During 12 mission flights over Europe, numerous contrails, cirrus...
One factor limiting the understanding of climate impact from contrails and aircraft induced cloud modifications is accurate determination their optical depth.To this end, 14 were sampled for 2756 s with instruments onboard research Falcon during CONCERT (CONtrail Cirrus ExpeRimenT) campaign in November 2008.The young (<10 min old) produced by 9 commercial weights 47 to 508 t, among them largest operating passenger aircraft, Airbus A380.The observed at temperatures between 214 224 K altitudes...
Abstract We describe results of in situ observations a 1‐ to 2‐min‐old contrail the vortex phase generated from soot‐rich exhaust (>10 15 emitted soot particles per kilogram fuel burned). Simultaneous measurements (EI ) and apparent ice (AEI particle number emission indices show pronounced anticorrelation vertical profile. AEI decrease by about 75% with increasing distance below contrail‐producing aircraft, while EI increase an equivalent relative fraction, therefore strongly suggesting...
Abstract. Mean properties of individual contrails are characterized for a wide range jet aircraft as function age during their life cycle from seconds to 11.5 h (7.4–18.7 km altitude, −88 −31 °C ambient temperature), based on compilation about 230 previous in situ and remote sensing measurements. The airborne, satellite, ground-based observations encompass exhaust 1972 onwards, well few older data propeller aircraft. by mean ice particle sizes concentrations, extinction, water content,...
Abstract The European Union (EU)-funded project Dynamics–Aerosol–Chemistry–Cloud Interactions in West Africa (DACCIWA) investigates the relationship between weather, climate, and air pollution southern Africa—an area with rapid population growth, urbanization, an increase anthropogenic aerosol emissions. over this region contains a unique mixture of natural gases, liquid droplets, particles, emitted environment which multilayer clouds frequently form. These exert large influence on local...
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. During the ACRIDICON-CHUVA field project (September–October 2014; based in Manaus, Brazil) aircraft-based situ measurements of aerosol chemical composition were conducted tropical troposphere over Amazon using High Altitude and Long Range Research Aircraft (HALO), covering altitudes from boundary layer (BL) height up to 14.4 km. The submicron non-refractory was characterized by flash-vaporization/electron impact-ionization particle mass spectrometry. results show that significant...
Abstract. We have investigated how aerosols affect the height above cloud base of rain and ice hydrometeor initiation subsequent vertical evolution droplet size number concentrations in growing convective cumulus. For this purpose we used situ data distributions measured with instruments mounted on HALO aircraft during ACRIDICON–CHUVA campaign over Amazon September 2014. The results show that by collision coalescence processes (Dr, units meters base) is linearly correlated concentration...
Abstract The largest share in the climate impact of aviation results from contrail cirrus clouds. Here, dependence microphysical ice properties and extinction on temperature humidity is investigated. Contrail measurements were performed at various altitudes during 2018 ECLIF II/NDMAX campaign with NASA DC‐8 chasing DLR A320. Ice number concentrations coefficients are near 9.5 km, typical for short‐ medium‐range air traffic. At higher 11.5 low ambient water vapor lead to smaller particle...
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. The strong reduction of air traffic during the COVID-19 pandemic provides a unique test case for relationship between density, contrails, and their radiative forcing climate change. Here, contrail cirrus changes are quantified European domain March to August 2020 compared same period in 2019. Traffic data show 72 % flight distance with This paper investigates induced model study. results depend on various methodological details as discussed parameter studies. In reference case,...