A5070834047- Meteorological Phenomena and Simulations
- Climate variability and models
- Atmospheric aerosols and clouds
- Planetary Science and Exploration
- Calibration and Measurement Techniques
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Scientific Research and Discoveries
- Spacecraft Dynamics and Control
- Geophysics and Gravity Measurements
- Nuclear Physics and Applications
- Precipitation Measurement and Analysis
- Spacecraft and Cryogenic Technologies
- Astro and Planetary Science
- Soil Moisture and Remote Sensing
- Solar and Space Plasma Dynamics
- Rocket and propulsion systems research
- Atmospheric Ozone and Climate
- Hydrology and Watershed Management Studies
- Marine and environmental studies
- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Space Science and Extraterrestrial Life
- Air Quality Monitoring and Forecasting
- Spacecraft Design and Technology
Universität Hamburg
2017-2024
Max Planck Institute for Meteorology
2017-2024
Princeton University
2024
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. As part of the EUREC4A field campaign which took place over tropical North Atlantic during January–February 2020, 1215 dropsondes from HALO and WP-3D aircraft were deployed through 26 flights to characterize thermodynamic dynamic environment clouds in trade-wind regions. We present JOANNE (Joint dropsonde Observations Atmosphere atlaNtic meso-scale Environments), dataset that contains these measurements products derived them. Along with raw measurement profiles basic...
Efforts in enhancing resolutions of climate models are largely motivated by improving the representation precipitation. Accurately capturing precipitation is key for understanding how a variety natural hazards will change future, such as floods and droughts. Recent advances within HIGHRES-MIP to 50 km resolution higher showed significant improvements representing compared CMIP6, particularly that associated with frontal systems mid-latitudes often manifesting Atmospheric Rivers (ARs). Here,...
To date, there is no long-term, stable, and uncertainty-quantified dataset of upper tropospheric humidity (UTH) that can be used for climate research. As intermediate step towards the overall goal constructing such a data record (CDR) UTH, we produced new fundamental (FCDR) on level brightness temperature microwave sounders will serve as basis CDR UTH. Based metrological principles, constructed implemented measurement equation uncertainty propagation in processing chain sounders. We...
Abstract. We assess the representation of elevated moist layers (EMLs) in ERA5 reanalysis, Infrared Atmospheric Sounding Interferometer (IASI) L2 retrieval Climate Data Record (CDR) and Sounder (AIRS)-based Community Long-term Microwave Combined Product System (CLIMCAPS)-Aqua retrieval. EMLs are free-tropospheric moisture anomalies that typically occur vicinity deep convection tropics. significantly affect spatial structure radiative heating, which is considered a key driver for meso-scale...
Abstract. As part of the EUREC4A field campaign which took place over tropical North Atlantic during January–February 2020, 1216 dropsondes from HALO and WP-3D aircraft were deployed through 26 flights to characterize thermodynamic dynamic environment clouds in trade-wind regions. We present JOANNE (Joint dropsonde Observations Atmosphere atlaNtic meso-scale Environments), dataset that contains these measurements products derived them. Along with raw measurement profiles basic...
Measurements of the disk-integrated brightness temperature Moon at 89, 157, 183, and 190 GHz are presented for phase angles between -80° 50° relative to full Moon. They were obtained with Microwave Humidity Sounder (MHS) on NOAA-18 from 39 instances when appeared in deep space view instrument. Polynomials fitted measured values maximum angle its occurrence determined. A comparison these results predictions three different models or rather parametrical expressions by Keihm, Mo & Kigawa,...
Thermal-infrared measurements of asteroids are crucial for deriving the objects' sizes, albedos, and also thermophysical properties surface material. Depending on available data, a range simple to complex thermal models applied achieve specific science goals. However, testing these is often difficult process uncertainties derived parameters not easy estimate. Here, we make an attempt verify widely accepted model (TPM) against unique infrared (IR), full-disk, well-calibrated Moon. The data...
Abstract. The ability of the hyperspectral satellite-based passive infrared (IR) instrument IASI to resolve elevated moist layers (EMLs) within free troposphere is investigated. EMLs are strong moisture anomalies with significant impact on radiative heating rate profile and typically coupled freezing level detrainment from convective cells in tropics. A previous case study by Stevens et al. (2017) indicated inherent deficiencies remote sensing instruments resolving an EML. In this work, we...
Abstract. As part of the EUREC4A field campaign, German research aircraft HALO, configured as a cloud observatory, conducted 15 flights in trade wind region east Barbados January and February 2020. Narrative text, state data, meta data describing HALO's operation during campaign are provided. Each HALO flight is segmented by time-stamp intervals into standard elements to aid consistent analysis data. Photographs from cabin animated satellite images synchronized with tracks provided visually...
Abstract. We analyzed intrusions of the Moon in deep space view Advanced Microwave Sounding Unit-B on NOAA-16 satellite and found no significant discrepancies signals from different sounding channels between 2001 2008. However, earlier investigations had detected biases up to 10 K, by using simultaneous nadir overpasses with other satellites. These observations Earth scenes cannot be due non-linearity receiver or contamination without affecting signal as well. As neither major anomalies...
Abstract. We assess the representation of Elevated Moist Layers (EMLs) in ERA5 reanalysis, IASI L2 retrieval Climate Data Record (CDR) and AIRS-based CLIMCAPS-Aqua retrieval. EMLs are free tropospheric moisture anomalies that typically occur vicinity deep convection tropics. significantly effect spatial structure radiative heating, which is considered a key driver for meso-scale dynamics, particular convective aggregation. To our knowledge, mentioned data products have not been explicitly...
Mid-tropospheric elevated moist layers (EMLs) near the melting level have been found in various regional observational studies tropics. Recently, a preponderance of EMLs presence aggregated convection was cloud resolving simulations radiative convective equilibrium (RCE), highlighting significant circulation coupling. Here, we present global monthly EML occurrence rates based on reanalysis, yielding broader view where and when occur real world. Over Atlantic, follows an annual cycle that...
Atmospheric Rivers (ARs) transport vast amounts of water vapor from the tropics to mid-latitudes, resulting in sustained, heavy precipitation that explains about 50 % mid-latitude annual mean rainfall. AR events over Western US have shown particularly high societal impact, where orographic and soil conditions make communities vulnerable floods mudslides. Climate modelling approaches for capturing extreme runoff on land are both strongly constrained by horizontal resolution is currently...
Abstract Mid‐tropospheric elevated moist layers (EMLs) near the melting level have been found in various regional observational studies tropics. Recently, a preponderance of EMLs presence aggregated convection was cloud resolving simulations radiative convective equilibrium (RCE), highlighting significant circulation coupling. Here, we present global monthly EML occurrence rates based on reanalysis, yielding broader view where and when occur real world. Over Atlantic, follows seasonal cycle...
Abstract Opportunistic constant target matching is a new method for satellite intercalibration. It solves long‐standing issue with the traditional simultaneous nadir overpass (SNO) method, namely, that it typically provides only data points cold brightness temperatures humidity sounding instruments on sun‐synchronous satellites. In geostationary infrared sensor (SEVIRI) used to select matches two different microwave sensors (MHS NOAA 18 and Metop A). We discuss main assumptions limitations...
The High-Resolution Infrared Radiation Sounder (HIRS) has been operational since 1975 on different satellites. In spite of this long utilization period, the available information about some its basic properties is incomplete or contradictory. We have approached problem by analyzing intrusions Moon in deep space view HIRS/2 through HIRS/4. With method we found: (1) diameters field HIRS/2, HIRS/3, and HIRS/4 relative proportions 1.4 ° to 1.3 0.7 with all channels; (2) co-registration differs...
Abstract A major problem with calculating the uncertainties of measurements weather satellites is fact that a full characterization and calibration their instruments can only be carried out before launch. The Moon, however, makes at least some these activities possible in flight as well by providing reliable flux reference well‐defined position. We used serendipitous observations Moon AMSU‐B MHS on eight different to measure pointing accuracy, spectral channels coregistration, beamwidth...
Abstract. We analyzed intrusions of the Moon in deep space view Advanced Microwave Sounding Unit-B on NOAA-16 satellite and found no significant discrepancies signals from different sounding channels between 2001 2008. Earlier investigations, however, had detected biases up to 10 K by using simultaneous nadir overpasses with other satellites. These observations Earth scenes cannot be due non-linearity receiver or contamination without affecting signal as well. As major anomalies on-board...
Abstract. The ability of the hyperspectral satellite based passive infrared instrument IASI to resolve Elevated Moist Layers (EMLs) within free troposphere is investigated. EMLs are strong moisture anomalies with significant impact on radiative heating rate profile and thought be coupled freezing level detrainment convective cells in tropics. Based an exemplary EML testcase forward modelled observations, it shown that if sufficient independent humidity temperature information available, do...