A5113930504- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Ionosphere and magnetosphere dynamics
- Aerospace and Aviation Technology
- Wind and Air Flow Studies
- Geophysics and Gravity Measurements
- Advanced Aircraft Design and Technologies
- Air Traffic Management and Optimization
- Spectroscopy and Laser Applications
- Inertial Sensor and Navigation
- Climate variability and models
- Air Quality and Health Impacts
- Ocean Waves and Remote Sensing
- GNSS positioning and interference
- Fire effects on ecosystems
- Advanced Sensor Technologies Research
- Plant responses to elevated CO2
- Lightning and Electromagnetic Phenomena
- Vehicle emissions and performance
- Gas Dynamics and Kinetic Theory
- Computational Fluid Dynamics and Aerodynamics
- Aeolian processes and effects
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2024
Ludwig-Maximilians-Universität München
2021
FX Palo Alto Laboratory
2012
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 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 The southern part of South America and the Antarctic peninsula are known as world’s strongest hotspot region stratospheric gravity wave (GW) activity. Large tropospheric winds deflected by Andes Peninsula excite GWs that might propagate into upper mesosphere. Satellite observations show large GW activity above mountains, Drake Passage, in a belt centered along 60°S. This scientifically highly interesting for studying dynamics was focus Southern Hemisphere Transport, Dynamics,...
Abstract. As part of the EUREC4A (Elucidating role cloud–circulation coupling in climate) field campaign, German research aircraft HALO (High Altitude and Long Range Research Aircraft), configured as a cloud observatory, conducted 15 flights trade-wind region east Barbados January February 2020. Narrative text, state data, metadata describing HALO's operation during campaign are provided. Each flight is segmented by timestamp intervals into standard elements to aid consistent analysis data....
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 This study investigates the onset phase of a strong Adriatic bora windstorm that occurred on 4 April 2002. The target area is gap about 20 km wide embedded in coastal mountain barrier Dinaric Alps favours jet‐like winds. Airborne‐aerosol back‐scatter lidar measurements board DLR Falcon research aircraft, together with surface and upper‐air observations, are used to verify high‐resolution numerical experiments conducted mesoscale atmospheric model RAMS single‐layer shallow‐water...
Abstract. Accurate measurement of water vapor in the climate-sensitive region near tropopause is very challenging. Unexplained systematic discrepancies between measurements at low mixing ratios made by different instruments on airborne platforms have limited our ability to adequately address a number relevant scientific questions humidity distribution, cloud formation and climate impact that region. Therefore, during past decade, community has undertaken substantial efforts understand these...
Abstract. Stratosphere–troposphere exchange within extratropical cyclones provides the potential for anthropogenic and natural surface emissions to rapidly reach stratosphere as well ozone from penetrate deep into troposphere, even down boundary layer. The efficiency of this process directly influences climate, chemistry in stratosphere, chemical composition transition layer, pollution levels. Here, we present evidence a mixing which has gained only small amount attention so far fosters...
Abstract. An innovative calibration method for the wind speed measurement using a boom-mounted Rosemount model 858 AJ air velocity probe is introduced. The demonstrated sensor system installed on medium-size research aircraft which used measurements in atmospheric boundary layer. encounters series of coordinated flight manoeuvres to directly estimate aerodynamic influences and calculate uncertainties. introduction differential Global Positioning System (DGPS) combined with high-accuracy...
Abstract. During the TROCCINOX field experiment in January and February 2005, contribution of lightning-induced nitrogen oxides (LNOx) from tropical subtropical thunderstorms Southern Brazil was investigated. Airborne trace gas measurements (NO, NOy, CO O3) were performed up to 12.5 km with German research aircraft Falcon. anvil penetrations selected 4 18 February, NOx mixing ratios on average enhanced by 0.7–1.2 0.2–0.8 nmol mol−1 totally, respectively. The relative contributions boundary...
Accurate static-pressure measurements are a prerequisite for safe navigation and precise air-data on aircraft. Pressure is also fundamental wind air temperature analysis in meteorology. Static-pressure measurement by aircraft disturbed aerodynamics needs to be corrected using calibration. In this paper, comparison has been made between static pressure measured means of trailing cone the atmosphere behind two different jet at flight levels up 450 data from numerical weather predictions. The...
We present a description of the evolution convective boundary layer (CBL) over boreal forests Saskatchewan and Manitoba, as observed by National Center for Atmospheric Research (NCAR) Electra research aircraft during 1994 Boreal Ecosystem‐Atmosphere Study (BOREAS). All observations were made between 1530 2230 UT (0930–1630 local solar time (LST)). show that CBL flux divergence often led to drying course day, with greatest (approaching 0.5 g kg −1 h ) in morning, 1000–1200 LST, decreasing...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an airborne infrared limb imager combining a two-dimensional detector with Fourier transform spectrometer. It was operated aboard new German Gulfstream G550 High Altitude LOng Range (HALO) research aircraft during Transport And Composition in upper Troposphere/lowermost Stratosphere (TACTS) and Earth System Model Validation (ESMVAL) campaigns summer 2012. This paper describes retrieval temperature trace...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) was operated on board German High Altitude and Long Range Research Aircraft (HALO) during PGS (POLSTRACC/GW-LCYCLE/SALSA) aircraft campaigns in Arctic winter 2015/2016. flights were conducted from 17 December 2015 until 18 March 2016 within 25–87∘ N, 80∘ W–30∘ E. From GLORIA infrared limb-emission measurements, two-dimensional cross sections temperature, HNO3, O3, ClONO2, H2O CFC-12 are retrieved. During 15...
The water vapor differential absorption lidar (DIAL) of the German Aerospace Research Establishment (DLR) was flown aboard National Center for Atmospheric (NCAR) Electra research aircraft during Boreal Ecosystem‐Atmosphere Study (BOREAS). downward looking system measured two‐dimensional fields aerosol backscatter and mixing ratio in convective boundary layer (CBL) across CBL top ( z t ). We show a case study DIAL observations vertical profiles mean vapor, variance, skewness, integral scale...
Abstract. The indirect effect of atmospheric aerosol particles on the Earth's radiation balance remains one most uncertain components affecting climate change throughout industrial period. large uncertainty is partly due to incomplete understanding aerosol–cloud interactions. One objective GoAmazon2014/5 and ACRIDICON (Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud Systems)-CHUVA (Cloud Processes Main Precipitation Systems in Brazil) projects was understand...
For the first time, two lidar systems were used to measure vertical water vapor flux in a convective boundary layer by means of eddy correlation. This was achieved combining differential absorption and heterodyne wind ground-based experiment. The results prove that combined system can determine profiles with height resolution approximately 100 m. Vertical averaging over greater interval reduces error sufficiently changes occurring throughout day as result solar heating be resolved....
Abstract. The water vapor distribution in the upper troposphere–lower stratosphere (UTLS) region has a strong impact on atmospheric radiation budget. Transport and mixing processes different scales mainly determine concentration UTLS. Here, we investigate effect of mountain waves vertical transport vapor. For this purpose analyze measurements meteorological parameters recorded by DLR Falcon NSF/NCAR Gulfstream V research aircraft taken during Deep Propagating Gravity Wave Experiment...
During the Polar Stratospheric Aerosol Experiment, total water was measured using an airborne Lyman‐α fluorescence hygrometer. The inlet is designed for anisokinetic sampling, thus large ice particles are detected sensitively. flight on January 24, 1997, temperatures of 200 K occurred close to tropopause. Within this cold area, existence with radii ≥ 4 µm containing amounts observed. At edge cloud, mixing ratios 5–6 ppmv and saturation were at below This observation together analysis...