A5061727039- Radiation Detection and Scintillator Technologies
- Atmospheric aerosols and clouds
- Arctic and Antarctic ice dynamics
- Particle Accelerators and Free-Electron Lasers
- Atmospheric chemistry and aerosols
- Crystallography and Radiation Phenomena
- Atmospheric and Environmental Gas Dynamics
- Radioactive contamination and transfer
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Climate variability and models
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Planetary Science and Exploration
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Climate change and permafrost
- Cryospheric studies and observations
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Corporate Governance and Management
- Spacecraft Design and Technology
- Metabolomics and Mass Spectrometry Studies
- Animal Ecology and Behavior Studies
- Systems Engineering Methodologies and Applications
Leipzig University
2023-2024
Leibniz Centre for Tropical Marine Research
2017
Institute for Applied Systems Technology Bremen
2005-2011
Max Planck Institute for Meteorology
1981
University of St. Gallen
1975
Abstract. Global warming is amplified in the Arctic. However, numerical models struggle to represent key processes that determine Arctic weather and climate. To collect data help constrain models, HALO–(𝒜𝒞)3 aircraft campaign was conducted over Norwegian Greenland seas, Fram Strait, central Ocean March April 2022. The focused on one specific challenge posed by namely reasonable representation of transformations air masses during their meridional transport into out via northward moist-...
Abstract. How air masses transform during meridional transport into and out of the Arctic is not well represented by numerical models. The airborne field campaign HALO-(𝒜𝒞)3 applied High Altitude Long-range Research Aircraft (HALO) within framework collaborative research project on amplification (𝒜𝒞)3 to address this question providing a comprehensive observational basis. took place from 7 March 12 April 2022 in North Atlantic sector Arctic, main gateway atmospheric Arctic. Here, we...
Abstract. The global warming is amplified in the Arctic. To collect data that help to constrain weather and climate models, which often do not realistically represent enhanced Arctic warming, HALO-(AC)³ aircraft campaign was conducted March April 2022 over Norwegian Greenland Seas, Fram Strait, central Ocean. Observations were made areas of open ocean, marginal sea ice zone, ice. Two low-flying one long-range, high-altitude research have been employed. Whenever possible, three flown...
Abstract. The airborne field campaign HALO–(AC)³ took place from 07 March to 12 April 2022 and was designed observe the transformation of air masses during their meridional transport in North Atlantic sector Arctic. We evaluate meteorological sea ice conditions based on European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis v5 (ERA5), satellite data, atmospheric soundings with respect climatology describe special synoptic events. started a warm period (11–20 March) where...
Abstract. Arctic air masses undergo intense transformations when moving southward from closed sea ice to warmer open waters in marine cold-air outbreaks (CAOs). Due the lack of measurements diabatic heating and moisture uptake rates along CAO flows, studies often depend on atmospheric reanalysis output. However, uncertainties connected those datasets remain unclear. Here, we present height-resolved airborne observations heating, uptake, cloud evolution measured a quasi-Lagrangian manner. The...
Abstract. The HALO–(𝒜𝒞)3 aircraft campaign was carried out in March and April 2022 over the Norwegian Greenland seas, Fram Strait, central Arctic Ocean. Three research – High Altitude Long Range Research Aircraft (HALO), Polar 5, 6 performed 54 partly coordinated flights on 23 flight days areas of open ocean, marginal sea ice zone (MIZ), ice. general objective to quantify evolution air mass properties during moist warm-air intrusions (WAIs) cold-air outbreaks (CAOs). To obtain a...
Significant information can he extracted from satellite measurements in water vapor bands so that an accurate association of the observable phenomena corresponding images and altitude level is required. In order to evaluate rapidly contribution different atmospheric layers with desired high accuracy for spectrally wide channels, transmittance functions 25 cm−1 intervals covering whole 6.3 μm band have been fitted line-by-line calculations. Contribution determined varying conditions viewing...
Abstract. The HALO–(AC)3 aircraft campaign was carried out in March and April 2022 over the Norwegian Greenland Seas, Fram Strait, central Arctic Ocean. Three research aircraft, High Altitude Long Range Research Aircraft (HALO), Polar 5, 6, performed 54 partly coordinated flights on 23 flight days areas of open ocean, marginal sea ice zone (MIZ), ice. general objective to quantify evolution air mass properties during moist warm intrusions (WAIs) cold outbreaks (CAOs). To gain a comprehensive...
Abstract. In this case study, measured solar irradiances above and below Arctic cirrus are compared to simulations of the European Centre for Medium-Range Weather Forecasts’ Integrated Forecasting System (IFS) making use offline runs operational ecRad radiation scheme. Independent irradiances, properties derived from active remote sensing used evaluate optical microphysical parameterizations in ecRad. The data set was collected central over sea ice (81°–90° North) with High Altitude LOng...
Abstract. The simulations of upward and downward irradiances by the Integrated Forecasting System (IFS) European Centre for Medium-Range Weather Forecasts are compared with broadband solar irradiance measurements from Arctic CLoud Observations Using airborne during polar Day (ACLOUD) campaign. For this purpose, offline radiative transfer were performed ecRad radiation scheme using operational IFS output. agree within measurement uncertainty. However, underestimates reflected above sea ice...
The representation of Arctic clouds in numerical weather prediction models is challenging, especially for mixed-phase with both a liquid and ice phase present. This cloud type frequently observed the pronounced longevity. In this paper, measurements conducted during CLoud Observations Using airborne polar Day (ACLOUD) campaign, which took place May/June 2017 northwest Svalbard, Norway, are compared operational 'Atmospheric Model high resolution' configuration (HRES) Integrated Forecasting...
We use airborne radiation measurements from the research campaign on ice clouds in high latitudes (CIRRUS-HL, 31 May – 29 July 2021) collected with Spectral Modular Airborne measuRement sysTem (SMART) to evaluate performance of radiative transfer scheme ecRad Integrated Forecasting System (IFS) numerical weather prediction model developed by European Center for Medium-Range Weather Forecast (ECMWF). focus properties and effects Arctic cirrus, which compared mid-latitude cirrus is known have...
Abstract. In two case studies, airborne measurements of broadband solar irradiances above and below Arctic cirrus are compared to simulations the Integrated Forecasting System (IFS) operated by European Centre for Medium-Range Weather Forecasts (ECMWF) using offline runs ECMWF's operational radiation scheme, “ecRad”. Furthermore, independent irradiances, properties derived from collocated active remote sensing observations evaluate optical microphysical parameterizations in ecRad. The data...
Abstract. The simulations of upward and downward irradiances by the Integrated Forecasting System (IFS) European Centre for Medium-Range Weather Forecasts are compared to broadband solar irradiance measurements from Arctic CLoud Observations Using airborne during polar Day (ACLOUD) campaign. For this purpose, offline radiative transfer with ecRad radiation scheme using operational IFS output were performed. agree within measurement uncertainty. However, underestimates reflected above sea ice...