A5081410337- Meteorological Phenomena and Simulations
- Ocean Waves and Remote Sensing
- Atmospheric aerosols and clouds
- Oceanographic and Atmospheric Processes
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Wind Energy Research and Development
- Wind and Air Flow Studies
- Arctic and Antarctic ice dynamics
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Methane Hydrates and Related Phenomena
- Air Traffic Management and Optimization
- Aerospace and Aviation Technology
- Cryospheric studies and observations
- Vehicle emissions and performance
- Icing and De-icing Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Air Quality Monitoring and Forecasting
- Climate change and permafrost
- Remote Sensing and LiDAR Applications
- Arctic and Russian Policy Studies
- Fluid Dynamics and Turbulent Flows
- Energy Load and Power Forecasting
- Coal Properties and Utilization
Technische Universität Braunschweig
2016-2025
Institute of Flight
2015-2024
Guidance (United Kingdom)
2022-2024
Karlsruhe Institute of Technology
2020
Helmholtz-Zentrum Hereon
2020
University of Tübingen
2020
Garmisch-Partenkirchen Medical Center
2020
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2008-2013
With the Arctic rapidly changing, needs to observe, understand, and model changes are essential. To support these needs, an annual cycle of observations atmospheric properties, processes, interactions were made while drifting with sea ice across central during Multidisciplinary Observatory for Study Climate (MOSAiC) expedition from October 2019 September 2020. An international team designed implemented comprehensive program document characterize all aspects system in unprecedented detail,...
Year-round observations of the physical snow and ice properties processes that govern pack evolution its interaction with atmosphere ocean were conducted during Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) expedition research vessel Polarstern in Ocean from October 2019 to September 2020. This work was embedded into interdisciplinary design 5 MOSAiC teams, studying atmosphere, sea ice, ocean, ecosystem, biogeochemical processes. The overall aim characterize cover...
More than 12 GW of offshore wind turbines are currently in operation European waters. To optimise the use marine areas, farms typically clustered units several hundred turbines. Understanding wakes farms, which is region momentum and energy deficit downwind, important for optimising farm layouts to minimize costs. While most weather situations (unstable atmospheric stratification), only a local effect within farm, satellite imagery reveals wind-farm be tens kilometres length under certain...
Abstract The Nord Stream pipeline leaks on 26 September 2022 released 465 ± 20 kt of methane into the atmosphere, which is largest recorded transient anthropogenic emission event. While most gas escaped directly to a fraction dissolved in water. So far, studies fate this rely volumetric estimates or spatially sparse concentration measurements and ocean models. Here, we use atmospheric with broad spatial coverage obtained from an airborne platform estimate outgassing 19-48 t h −1 5 October...
Abstract We present an analysis of wind measurements from a series airborne campaigns conducted to sample the wakes two North Sea farm clusters, with aim determining dependence downstream speed recovery on atmospheric stability. The consequences stability wake length expected annual energy yield farms in are assessed by engineering model. Wakes found extend for significantly longer distances (>50 km) stable conditions than neutral and unstable ( 15 km). parameters one common model...
Abstract. This paper presents the unmanned research aircraft Carolo P360 "ALADINA" (Application of Light-weight Aircraft for Detecting IN situ Aerosol) investigating horizontal and vertical distribution ultrafine particles in atmospheric boundary layer (ABL). It has a wingspan 3.6 m, maximum take-off weight 25 kg is equipped with aerosol instrumentation meteorological sensors. A first application system, together MASC (Multi-Purpose Airborne Carrier) Eberhard Karls University Tübingen...
Abstract. Wind farms affect local weather and microclimates; hence, parameterizations of their effects have been developed for numerical prediction models. While most wind farm (WFPs) include drag farms, models differ on whether or not an additional turbulent kinetic energy (TKE) source should be included in these to simulate the impact boundary layer. Therefore, we use aircraft measurements above large offshore stable conditions evaluate WFP choices. Of three case studies examine, find...
The amount of methane released to the atmosphere from Nord Stream subsea pipeline leaks remains uncertain, as reflected in a wide range estimates1–18. A lack information regarding temporal variation atmospheric emissions has made it challenging reconcile volumetric (bottom-up) estimates1–8 with measurement-based (top-down) estimates8–18. Here we simulate rupture emission rates and integrate these dissolution sea-surface outgassing estimates9,10 model evolution leaks. We verify our modelled...
Abstract. This study introduces a helicopter-borne mass balance approach, utilizing the HELiPOD platform, to accurately quantify methane (CH₄) emissions from coal mining activities. Compared conventional research aircraft use of an external sling load configuration eliminates need for aeronautical certifications, facilitates easier modifications and enables local helicopter companies conduct flights. Furthermore, it allows plume probing as close several hundred meters downwind emission...
In Europe, offshore wind farms have a capacity of 16 GW, with 71% installed at the North Sea. These represent an additional source turbulence and may influence stratification marine boundary layer. We present aircraft measurements simulations showing impact on temperature humidity hub height in order 0.5 K g kg−1 even 60 km downwind farm cluster. extend these to explore realistic future scenario, suggesting wakes potential water vapor propagating more than 100 downwind. Such impacts are only...
The unmanned research aircraft ALADINA (Application of Light-weight Aircraft for Detecting in situ Aerosols) has been established as an important tool boundary layer research. For simplified integration additional sensor payload, a flexible and reliable data acquisition system was developed at the Institute Flight Guidance, Technische Universität (TU) Braunschweig. instrumentation consists sensors temperature, humidity, three-dimensional wind vector, position, black carbon, irradiance...
This publication synthesizes the results of WIPAFF (WInd PArk Far Fields) project. focused on far field large offshore wind park wakes (more than 5 km downstream parks) located in German North Sea. The research project combined situ aircraft and remote sensing measurements, satellite SAR data analysis model simulations to enable a holistic coverage wakes. measurements recorded on-board DO-128 by laser scanner prove that more 50 kilometers exist under certain atmospheric conditions....
Unmanned aerial systems (UAS) fill a gap in high-resolution observations of meteorological parameters on small scales the atmospheric boundary layer (ABL). Especially remote polar areas, there is strong need for such detailed with different research foci. In this study, three are presented which have been adapted to particular needs operating harsh environments: The fixed-wing aircraft M 2 AV mass 6 kg, quadrocopter ALICE 19 and ALADINA almost 25 kg. For all systems, their modifications...
Abstract. The role of polar regions is increasing in terms megatrends such as globalization, new transport routes, demography, and the use natural resources with consequent effects on regional transported pollutant concentrations. We set up ERA-PLANET Strand 4 project “iCUPE – integrative Comprehensive Understanding Polar Environments” to provide novel insights observational data global grand challenges an Arctic focus. utilize integrated approach combining situ observations, satellite...
Abstract. As part of the ongoing X-Wakes research project, a 5-month wake-measurement campaign was conducted using scanning lidar installed amongst cluster offshore wind farms in German Bight. The main objectives this study are (1) to demonstrate performance such system and thus quantify wake effects reliably (2) obtain experimental data validate effect simulated by flow models involved project. Due lack free for directions, speeds obtained from mesoscale model (without any farm...
The Arctic climate is modulated, in part, by atmospheric aerosols that affect the distribution of radiant energy passing through atmosphere. Aerosols surface‐atmosphere radiation balance directly interactions with solar and terrestrial indirectly cloud particles. Better quantification radiative forcing different types aerosol needed to improve predictions future climate. During April 2009, airborne campaign Pan‐Arctic Measurements Regional Climate Model Inter‐comparison Project (PAM‐ARCMIP)...
Large offshore wind farms are usually clustered around transmission grids to minimize the expense of transmission and due space military zones, pipelines constrains other uses such as nature preserves. However, this close proximity can undermine power production in downwind due to wakes from upwind farms. Therefore, energy industry has great interest determining the spatial dimensions of farm assess economical potential planned In this work we use wake measurements conducted by a...
The main aim of this paper is to explore the potential combining measurements from fixed- and rotary-wing remotely piloted aircraft systems (RPAS) complement data sets radio soundings as well ship sea-ice-based instrumentation for atmospheric boundary layer (ABL) profiling. This study represents a proof-of-concept RPAS observations in Antarctic sea-ice zone. We present first results RV Polarstern winter expedition Weddell Sea June–August 2013, during which three were operated measure...
Abstract. This study presents the first deployment in field campaigns of a balloon-borne turbulence probe, developed with sonic anemometer and an inertial motion sensor suspended below tethered balloon. system measures temperature horizontal vertical wind at high frequency allows estimation heat momentum fluxes as well turbulent kinetic energy lower part boundary layer. The was validated during three experiments different convective boundary-layer conditions, based on measurements from...
Air quality measurements usually consist of ground-based instrumentation at fixed locations. However, vertical profiles pollutants are interest for understanding processes, distribution, dilution and concentration. Therefore, a multicopter system has been developed to investigate the distribution concentration aerosol particles, black carbon, ozone, nitrogen oxides (NOx) carbon monoxide meteorological parameters temperature humidity. This article presents requirements by different users,...
Abstract. Arctic boundary-layer clouds were investigated with remote sensing and in situ instruments during the Study of Tropospheric Aerosol, Clouds Radiation (ASTAR) campaign March April 2007. The formed a cold air outbreak over open Greenland Sea. Beside predominant mixed-phase pure liquid water ice observed. Utilizing measurements solar radiation reflected by three methods to retrieve thermodynamic phase cloud are introduced compared. Two indices IS IP obtained analyzing spectral pattern...
Abstract. Between 6 September 2016 and 15 October 2017, meteorological measurement flights were conducted above the German Bight in framework of project WIPAFF (Wind Park Far Field). The scope measurements was to study long-range wakes with an extent larger than 10 km behind entire wind parks, investigate interaction parks marine atmospheric boundary layer. research aircraft Dornier 128 Technische Universität (TU) Braunschweig performed total 41 during different seasons stability conditions....
Unmanned aircraft systems (UAS) have rapidly become more common in various applications. At the same time, need for a safe UAS operation is of great importance to minimize and avoid risks that could arise with deployment this technology. With these requirements, regulators European Union (EU) are making large efforts enable reliable legal framework conditions keep up new capabilities technology risk property damage and, most importantly, human injury. A recent outcome mentioned EU drone...