A5062584711- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Advanced Fiber Laser Technologies
- Air Quality and Health Impacts
- Laser-Matter Interactions and Applications
- Advanced Aircraft Design and Technologies
- Aeolian processes and effects
- Photonic Crystal and Fiber Optics
- Atmospheric and Environmental Gas Dynamics
- Congenital Heart Disease Studies
- Optical Network Technologies
- Air Traffic Management and Optimization
- Phonocardiography and Auscultation Techniques
- ECG Monitoring and Analysis
- Ultrasound in Clinical Applications
- Ionosphere and magnetosphere dynamics
- Solid State Laser Technologies
- Meteorological Phenomena and Simulations
- Photonic and Optical Devices
- Nonlinear Photonic Systems
- Cardiovascular and Diving-Related Complications
- Laser-Plasma Interactions and Diagnostics
- Nonlinear Waves and Solitons
- Cardiac Arrhythmias and Treatments
Max Planck Institute for Chemistry
2016-2024
Forschungszentrum Jülich
2020-2024
Deutsches Elektronen-Synchrotron DESY
2019-2022
Johannes Gutenberg University Mainz
2015-2021
Center for Free-Electron Laser Science
2021
Universität Hamburg
2021
TU Dortmund University
2019
University of Rostock
2009-2018
Tripler Army Medical Center
2004-2017
Children's Hospital of Pittsburgh
2002-2006
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. 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. 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...
The concept of rogue waves arises from a mysterious and potentially calamitous phenomenon oceanic surfaces. There is mounting evidence that they are actually commonplace in variety different physical settings. A set defining criteria has been advanced; this great generality therefore applicable to wide class systems. question naturally whether there generic mechanisms responsible for extreme events Here we argue under suitable circumstances nonlinear interaction between weak strong results...
Abstract. The effects of aerosol particles and updraft speed on warm-phase cloud microphysical properties are studied in the Amazon region as part ACRIDICON-CHUVA experiment. Here we expand sensitivity analysis usually found literature by concomitantly considering evolution, putting quantifications into perspective relation to in-cloud processing, droplet size distribution (DSD) shape. Our situ aircraft measurements over Basin cover a wide range particle concentration thermodynamic...
Abstract. Microphysical, optical, and environmental properties of contrail cirrus natural were investigated by applying a new, statistically based contrail–cirrus separation method to 14.7 h cloud measurements (sampling frequency 1 Hz, max. ∼ 290 m s−1, total length sampled in-cloud space 15 000 km) during the airborne campaign ML-CIRRUS in central Europe northeast Atlantic flight corridor spring 2014. We find that pure appears frequently at aircraft cruising altitude (CA) range with ambient...
Spanning less than two centuries, pediatrics is a relatively young medical specialty. Prior to the development of pediatrics, needs infants and children were provided by families, friends, midwives; physicians rarely contributed health this population. However, events beginning in 19th century resulted who specifically addressed problems infancy childhood; thus pediatric specialty was born. This article presents summary cumulative forces responsible for as distinct branch practice.
Abstract. Particle concentration measurements with underwing probes on aircraft are impacted by air compression upstream of the instrument body as a function flight velocity. In particular, for fast-flying necessity arises to account sample volume. Hence, correction procedure is needed invert measured particle number concentrations ambient conditions that commonly applicable different instruments gain comparable results. region where detection particles occurs (i.e. under factual measurement...
Abstract. During the monsoon season of year 2017 airborne StratoClim mission took place in Kathmandu, Nepal, with eight flights M-55 Geophysica upper troposphere–lower stratosphere (UTLS) Asian anticyclone (AMA) over northern India, and Bangladesh. More than 100 events new particle formation (NPF) were observed. In total, more 2 h flight time was spent under NPF conditions as indicated by abundant presence nucleation-mode aerosols, i.e. diameters dp smaller 15 nm, which detected situ means...
Abstract. Aircraft-borne in situ measurements of the chemical aerosol composition were conducted Asian tropopause layer (ATAL) over Indian subcontinent summer 2017, covering particle sizes below ∼3 µm. We have implemented a recently developed mass spectrometer, which adopts laser desorption technique as well thermal method for quantitative bulk information (i.e., modified Aerodyne AMS), aboard high-altitude research aircraft M-55 Geophysica. The instrument was deployed July and August 2017...
Abstract According to the hypothesis of aerosol invigoration, higher concentration aerosols in polluted air intensifies storms. A leading theory for explaining such a relationship is warm‐phase which cloudy updrafts that are more readily condense water vapor onto liquid drops, thereby releasing latent heat faster, buoyancies and updraft speeds. For this mechanism work, water‐vapor supersaturations well excess 1% must be typical relatively unpolluted updrafts. Here, supersaturation calculated...
Abstract. The objective of this study is to validate parameterizations that were recently developed for satellite retrievals cloud condensation nuclei supersaturation spectra, NCCN(S), at base alongside more traditional connecting NCCN(S) with updrafts and drop concentrations. This was based on the HALO aircraft measurements during ACRIDICON–CHUVA campaign over Amazon region, which took place in September 2014. properties convective clouds measured a combination probe (CCP), aerosol...
Nitrogen oxides (NOx), ozone (O3), and carbon monoxide (CO) are important air quality indicators, while NOx is also one of the main precursors O3. These trace gases have anthropogenic natural sources at ground level in troposphere. At level, transport emissions, industry, agriculture, biomass burning. In troposphere, additional include lighting aircraft emissions upper downmixing from stratosphere makes a significant contribution to budget. Furthermore, abundances O3 troposphere controlled...
Abstract. Aircraft borne in-situ measurements of the chemical aerosol composition were conducted in Asian Tropopause Aerosol layer (ATAL) over Indian subcontinent summer 2017 covering particle sizes below 3 µm. We have implemented a recently developed mass spectrometer, which adopts laser desorption technique as well thermal method for quantitative bulk information (i.e. modified Aerodyne AMS), aboard high altitude research aircraft M-55 Geophysica. The instrument was deployed July and...
Objective. Multiple cross-sectional physician surveys have documented poor cardiac auscultation skills. We evaluated the impact of 2 different educational interventions on pediatric resident Methods. The skills all first-year (PGY1; n = 20) and second-year residents (PGY2; were at beginning end academic year. Five patient recordings presented: atrial septal defect, ventricular pulmonary valve stenosis, bicuspid aortic with insufficiency, innocent murmur. Residents asked to classify second...
Abstract. The Asian summer monsoon is an effective pathway for aerosol particles and precursors from the planetary boundary layer over Central, South, East Asia into upper troposphere lower stratosphere. An enhancement of within anticyclone (AMA), called tropopause (ATAL), has been observed by satellites. We discuss airborne in situ remote sensing observations microphysical properties conducted during 2017 StratoClim field campaign AMA region. particle measurements aboard high-altitude...
Abstract. Solar radiation reflected by cirrus and deep convective clouds (DCCs) was measured the Spectral Modular Airborne Radiation Measurement System (SMART) installed on German High Altitude Long Range Research Aircraft (HALO) during Mid-Latitude Cirrus (ML-CIRRUS) Aerosol, Cloud, Precipitation, Interaction Dynamic of Convective Clouds – Cloud Processes Main Precipitation Systems in Brazil: A Contribution to Resolving Modelling Global (ACRIDICON-CHUVA) campaigns. On particular flights,...
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...
Abstract. From 27 July to 10 August 2017, the airborne StratoClim mission took place in Kathmandu, Nepal, where eight flights were conducted with M-55 Geophysica up altitudes of 20 km. New particle formation (NPF) was identified by abundant presence nucleation-mode aerosols, diameters dp smaller than 15 nm, which in-situ-detected means condensation nuclei (CN) counter techniques. NPF fields clear skies as well cloud ice particles (dp > 3 µm) encountered at upper troposphere–lowermost...
The characteristics of aviation-induced aerosol, its processing, and effects on cirrus clouds climate are still associated with large uncertainties. Properties however, crucially needed for the assessment aviation's impacts today in future. We identified more than 1100 aircraft plume encounters during passenger flights IAGOS-CARIBIC Flying Laboratory from July 2018 to March 2020. aerosol properties inside plumes were similar, independent altitude (i.e., upper troposphere, tropopause region,...
Heart disease is a major cause of worldwide morbidity and mortality. Properly performed, the cardiac auscultatory examination (listening to heart with stethoscope) an inexpensive, widely available tool in detection management disease. Unfortunately, accurate interpretation heartsounds by primary care providers fraught error, leading missed diagnosis and/or excessive costs associated evaluation normal variants. Therefore, automated heartsound analysis, also known as computer aided...
Abstract Bicaval dual lumen catheters improve the efficiency of veno‐venous extracorporeal membrane oxygenation by minimizing recirculation with an innovative design, which requires precise placement three catheter ports in superior vena cava, right atrium, and inferior respectively. However, exact position these is usually not known during because they cannot be visualized conventional radiography. We performed a retrospective review our experience over past year using transthoracic...