Henning Dorff
A5014393945- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Atmospheric aerosols and clouds
- Air Traffic Management and Optimization
- Climate change and permafrost
- Aerospace and Aviation Technology
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Transportation Planning and Optimization
- Atmospheric chemistry and aerosols
- Geophysics and Gravity Measurements
- Urban Transport and Accessibility
- Arctic and Russian Policy Studies
- Radio Wave Propagation Studies
- Oceanographic and Atmospheric Processes
- Ocean Acidification Effects and Responses
- Vehicle emissions and performance
- Precipitation Measurement and Analysis
- Aeolian processes and effects
- Healthcare Systems and Challenges
- Clinical Nutrition and Gastroenterology
- Icing and De-icing Technologies
Universität Hamburg
2021-2024
Max Planck Institute for Meteorology
2021-2024
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. 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...
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. This study emulates dropsondes to elucidate the extent which sporadic airborne sondes adequately represent divergence of moisture transport in Arctic atmospheric rivers (ARs). The convergence vertically integrated (IVT) plays a crucial role as it favours precipitation that significantly affects sea ice properties. Long-range research aircraft can transect ARs and drop determine their IVT divergence. In order assess representativeness future sonde-based ARs, we disentangle...
Abstract Convincing commuters to use a bike is timely contribution reach sustainability goals. However, more than other modes of transportation, cycling heavily influenced by the current meteorological conditions. In this study, we assess weather conditions experienced on individual routes through an urban environment and how observations forecasts may give guidance better experience. We introduce agent‐based model that simulates trips in Hamburg, Germany, three‐category traffic light scheme...
Abstract. This study quantifies the evolution of moisture budget components an Arctic atmospheric river (AR) derived from airborne observations two research flights on consecutive days. We investigate how poleward transport warm and moist air masses by AR generates precipitation near sea ice edge, advection evaporation additionally affect local amount during dissipation phase AR. Using High Altitude LOng Range Research Aircraft (HALO), we derive (local tendency moisture, evaporation,...
Abstract. This study emulates dropsondes to elucidate how adequately sporadic airborne sondes represent divergence (convergence) of moisture transport in arctic Atmospheric Rivers. The convergence vertically integrated (IVT) plays a crucial role as it favours precipitation that significantly affects sea ice properties. Long range research aircraft can transect ARs and determine their IVT divergence. However, limited number may deteriorate the representation variability We disentangle errors...
Abstract. This study elaborates on how aircraft-based horizontal geometries of trade wind cumulus clouds differ whether a one-dimensional (1D) profiler or two-dimensional (2D) imager is used. While nadir profiling devices are limited to 1D realization the cloud transect size, with representativeness extension, 2D imagers enhance our perspectives by mapping field. Both require high resolutions detect lower end size spectrum. In this regard, payload aboard HALO (High Altitude and LOng Range...
Among arctic moist air intrusions, atmospheric rivers (ARs) provide substantial moisture transport over long distances poleward. Along their corridors, warm and masses undergo various transformation processes can cause regional sea ice decline, especially when they induce precipitation as rain. Quantifying the components of budget in ARs is key to elucidate efficiency. We close AR by measurements High Altitude LOng range research aircraft (HALO) during recent HALO-(AC)³ campaign...
<p>This study investigates in a synthetic way to what extent saw-tooth flight patterns from long-range research aircrafts can close the moisture budget of arctic atmospheric rivers (ARs). Such ARs dominate transport into Arctic. The analysis AR corridors is key understand spatiotemporal evolution, resulting air mass transformations along their pathway and precipitation efficiency ARs. However, determination components challenging due sparse observations. Dedicated campaigns...
<p>Convincing commuters to use a bike for their daily trips is timely contribution reach sustainable development goals. In public discussions, bad weather frequently raised as argument limiting the usability of cycling on an everyday basis. Looking at objective meteorological observations, how often does typical commuter in urban environment experiences while cycling? And can smart cyclists being informed by nowcasting and day-ahead forecasts effectively reduce number...
<p>Regarding arctic amplification, meridional transports of moisture and heat from subpolar regions represent a crucial phenomenon. Among such intrusions, Atmospheric Rivers (ARs) are characterized by narrow transient flows, which responsible for up to 90% vertical integrated water vapour transport (IVT) into the Arctic. Moreover, they relevant air mass transformations precipitation events. To identify local sources sinks associated with AR pathways, accurate determination...