A5050137003- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Climate variability and models
- Superconducting Materials and Applications
- Soil Moisture and Remote Sensing
- Particle accelerators and beam dynamics
- Atmospheric chemistry and aerosols
- Magnetic confinement fusion research
- Atmospheric and Environmental Gas Dynamics
- Aeolian processes and effects
- Wind and Air Flow Studies
- Air Quality Monitoring and Forecasting
- Ionosphere and magnetosphere dynamics
- Food Supply Chain Traceability
- Arctic and Antarctic ice dynamics
- Tropical and Extratropical Cyclones Research
- Spacecraft Design and Technology
- Satellite Image Processing and Photogrammetry
- Solar and Space Plasma Dynamics
- Bacteriophages and microbial interactions
- Atmospheric Ozone and Climate
- Radio Wave Propagation Studies
- Air Traffic Management and Optimization
- Algorithms and Data Compression
European Centre for Medium-Range Weather Forecasts
2024
Radiometer (Germany)
2016-2022
Siemens (Germany)
2022
University of Cologne
2013-2020
Large‐eddy simulations (LES) with the new ICOsahedral Non‐hydrostatic atmosphere model (ICON) covering Germany are evaluated for four days in spring 2013 using observational data from various sources. Reference established Consortium Small‐scale Modelling (COSMO) numerical weather prediction and further standard LES codes performed used as a reference. This comprehensive evaluation approach covers multiple parameters scales, focusing on boundary‐layer variables, clouds precipitation. The...
Abstract. Forward models are a key tool to generate synthetic observations given knowledge of the atmospheric state. In this way, they an integral part inversion algorithms that aim retrieve geophysical variables from or in data assimilation. Their application for exploitation full information content remote sensing becomes increasingly important when these used evaluate performance cloud-resolving (CRMs). Herein, CRM profiles fields provide input forward model whose simulation results...
Abstract. An advanced package of microwave remote sensing instrumentation has been developed for the operation on new German High Altitude LOng range research aircraft (HALO). The HALO Microwave Package, HAMP, consists two nadir-looking instruments: a cloud radar at 36 GHz and suite passive radiometers with 26 frequencies in different bands between 22.24 183.31 ± 12.5 GHz. We present description HAMP's together an illustration its potential. To demonstrate this potential, synthetic...
The microwave radiometers HATPRO (Humidity and Temperature Profiler) MiRAC-P (Microwave Radiometer for Arctic Clouds - Passive) continuously measured radiation emitted from the atmosphere throughout Multidisciplinary drifting Observatory Study of Climate (MOSAiC) expedition on board research vessel Polarstern. From brightness temperatures, we have retrieved atmospheric variables using statistical methods in a temporal resolution 1 s covering October 2019 to 2020. integrated water vapour...
Abstract This study investigates the benefits of a satellite HYperspectral Microwave Sensor (HYMS) for retrieval atmospheric temperature and humidity profiles, in context numerical weather prediction (NWP). In infrared, hyperspectral instruments have already improved accuracy NWP forecasts. so far only provide observations limited number carefully selected channels. An information content analysis is conducted here to assess impact microwave measurements on water vapor profiles under...
Remote sensing techniques offer the unique possibility to continuously and automatically monitor atmospheric state from ground space. Ground‐based microwave radiometers (MWRs), for example, are frequently used temperature humidity profiling of lower troposphere. In order improve profiles in middle upper troposphere, further information is needed. this respect, satellite measurements expected be very useful. study, synergy benefit clear‐sky using different combinations state‐of‐the‐art...
Shallow trade wind clouds pose one of the largest uncertainties in climate models. Due to difficulties assessing these with routine observations next-generation aircraft remote-sensing for validation campaign German High Altitude and LOng range research (HALO) took place December 2013. Here we take advantage synergy HALO active passive microwave package as well spectrally resolved solar radiation (SR) measured by HALO-SR characterize shallow Caribbean. Based on a cloud mask developed from...
Satellite and ground-based microwave radiometers are routinely used for the retrieval of liquid water path (LWP) under all atmospheric conditions. The vapor LWP from during rain has proved to be a difficult challenge two principal reasons: inadequacy nonscattering approximation in precipitating clouds deposition drops on instrument's radome. In this paper, we combine model computations real ground-based, zenith-viewing passive radiometer brightness temperature measurements investigate how...
Abstract Microwave radiometers (MWR) are commonly used to quantify the amount of supercooled liquid water (SLW) in clouds; however, accuracy SLW retrievals is limited by poor knowledge dielectric properties at microwave frequencies. Six permittivity models were compared with ground-based MWR observations between 31 and 225 GHz from sites Greenland, German Alps, a low-mountain site; average cloud temperatures observed thin layers range 0° −33°C. A recently published method derive ratios...
This study examines the information content on atmospheric temperature and humidity profiles that could be provided by a future spaceborne microwave sensor with few hundred radiances in millimetre submillimetre spectral domains (ranging from 7–800 GHz). A channel selection method based optimal estimation theory is undertaken, using database of associated errors European Centre for Medium‐Range Weather Forecasts (ECMWF) numerical weather prediction model radiative transfer Atmospheric...
Abstract An extended version of the Integrated Profiling Technique (IPT) is presented. The IPT combines measurements from cloud radar and microwave radiometer (MWR) with prior information in a 1D‐Var approach order to retrieve physically consistent atmospheric profiles temperature, absolute humidity, liquid water content (LWC), recently also droplet effective radius (REF). Physical consistency implies reproducibility within uncertainties. Results based on synthetic observations revealed good...
Abstract. Continuous monitoring of atmospheric humidity profiles is important for many applications, e.g., assessment stability and cloud formation. Nowadays there are a wide variety ground-based sensors profiling. Unfortunately no single instrument able to provide measurement with complete vertical coverage, high temporal resolution good performance under all weather conditions, simultaneously. For example, Raman lidar (RL) measurements can water vapor resolution, albeit limited due...
Abstract. Forward models are a key tool to generate synthetic observations given the knowledge of atmospheric state. In this way they an integral part inversion algorithms that aim retrieve geophysical variables from or in data assimilation. Their application for exploitation full information content remote sensing becomes increasingly important when these used evaluate performance cloud resolving (CRMs). Herein, CRMs profiles fields provide input forward model whose simulation results...
Abstract The database presented in this study has been acquired during the SOuth west FOGs 3D (SOFOG3D) experiment for processes study. This international campaign led by Météo-France winter 2019–2020 aimed at deploying a unique network of both situ and remote sensing measurements order to document spatial temporal variabilities fog events. To support scientific objective but also conduct first data assimilation experiments within French convective scale model AROME, an un-precedented 8...
Abstract High‐resolution ground‐based measurements are used to assess the realism of fine‐scale numerical simulations shallow cumulus cloud fields. The overlap statistics cumuli as produced by large‐eddy (LES) confronted with Cloudnet data sets at Jülich Observatory for Cloud Evolution. pixel is small enough detect cumuliform overlap. fraction masks derived five different cases, using gridded time‐height various temporal and vertical resolutions. ratio ( R ), i.e., between volume area,...
Abstract. An advanced package of microwave remote sensing instrumentation has been developed for the operation on new German High Altitude LOng range research aircraft (HALO). The HALO Microwave Package, HAMP, consists two nadir looking instruments: a cloud radar at 36 GHz and suite passive radiometers with 26 frequencies in different bands between 22.24 183.31 ± 12.5 GHz. We present description HAMP's together an illustration its potential. To demonstrate this potential synthetic...
Sun-tracking microwave (ST-MW) radiometry is a ground-based technique where the Sun used as beacon source to infer atmospheric path attenuation in all-weather conditions. ST-MW shows an appealing potential for overcoming difficulties perform satellite-to-Earth radiopropagation experiments unexplored millimeter-wave and submillimeter-wave frequency region, especially experimental data from receivers are not available. The theoretical framework, ad hoc procedures processing will be presented,...
Abstract During the SOuthwest FOGs 3D (SOFOG3D) campaign, a unique network of eight ground‐based microwave radiometers (MWRs) has been deployed over southwestern part France in order to improve fog forecasting, among other objectives. Observations have acquired from mid‐autumn mid‐spring 2019/2020 with aim assessing impact assimilation such observations Application de la Recherche à l'Opérationnel Méso‐Échelle (AROME‐France) numerical weather prediction model during conditions. For that...
Abstract. Continuous monitoring of atmospheric humidity profiles is important for many applications, e.g. assessment stability and cloud formation. Nowadays there a wide variety ground-based sensors profiling. Unfortunately no single instrument able to provide measurement with complete vertical coverage, high temporal resolution, good performance under all weather conditions, simultaneously. For example, Raman lidar (RL) measurements can water vapor resolution albeit limited due sunlight...
CORRESPONDING AUTHOR: Paquita Zuidema, Rosenstiel School of Marine and Atmospheric Science, University Miami, FL, 33149, E-mail: pzuidema@rsmas.miami.edu
<p>Fog forecasts still remain quite inaccurate due to the complexity, non linearities and fine scale of main physical processes driving fog lifecycle. Additionally complex modelling processes, current numerical weather prediction models are known suffer from a lack operational observations in atmospheric boundary layer more generally during cloudy-sky conditions. Continuous both thermodynamics microphysics lifecycle thus essential develop future networks with aim validating...