A5101710259- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Climate variability and models
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Oil Spill Detection and Mitigation
- Atmospheric chemistry and aerosols
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- Ocean Waves and Remote Sensing
- Marine and fisheries research
- Atmospheric and Environmental Gas Dynamics
- Toxic Organic Pollutants Impact
- Atmospheric Ozone and Climate
- Tropical and Extratropical Cyclones Research
- Coral and Marine Ecosystems Studies
- Coastal and Marine Dynamics
- Cryospheric studies and observations
- Ocean Acidification Effects and Responses
- Remote Sensing in Agriculture
- Geology and Paleoclimatology Research
- Non-Invasive Vital Sign Monitoring
- Mine drainage and remediation techniques
Universität Hamburg
2016-2025
Nanyang Technological University
2024-2025
Ludwig-Maximilians-Universität München
2016-2024
University of Calgary
2019-2024
Hamburg Institut (Germany)
2022
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 The North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX) explored the impact of diabatic processes on disturbances jet stream their influence downstream high-impact weather through deployment four research aircraft, each with a sophisticated set remote sensing in situ instruments, coordinated suite ground-based measurements. A total 49 flights were performed, including, for first time, aircraft: German High Altitude Long Range Research Aircraft (HALO), Deutsches...
Trade-wind cumuli constitute the cloud type with highest frequency of occurrence on Earth, and it has been shown that their sensitivity to changing environmental conditions will critically influence magnitude pace future global warming. Research over last decade pointed out importance interplay between clouds, convection circulation in controling this sensitivity. Numerical models represent diverse ways, which translates into different responses trade-cumuli climate perturbations. Climate...
Abstract Between 1 September and 4 October 2014, a combined airborne ground-based measurement campaign was conducted to study tropical deep convective clouds over the Brazilian Amazon rain forest. The new German research aircraft, High Altitude Long Range Research Aircraft (HALO), modified Gulfstream G550, extensive instrumentation were deployed in near Manaus (State of Amazonas). part German–Brazilian Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud...
More than one hundred days were simulated over very large domains with fine (0.156 km to 2.5 km) grid spacing for realistic conditions test the hypothesis that storm (kilometer) and large-eddy (hectometer) resolving simulations would provide an improved representation of clouds precipitation in atmospheric simulations. At scales resolve convective storms (storm-resolving short), vertical velocity variance becomes resolved a better physical basis is achieved representing precipitation....
Abstract A configuration of the High-Altitude Long-Range Research Aircraft (HALO) as a remote sensing cloud observatory is described, and its use illustrated with results from first second Next-Generation Remote Sensing for Validation (NARVAL) field studies. Measurements NARVAL (NARVAL2) are used to highlight ability HALO, when configured in this fashion, characterize not only distribution water condensate atmosphere, but also impact on radiant energy transfer covarying large-scale...
ABSTRACT The German Bight, located in the southeastern part of North Sea, undergoes notable variations wind direction and intensity over time. In this work, regional coupled ocean–atmosphere system dynamically downscaled model MPIOM‐REMO under RCP8.5 emissions scenario (2006–2099) have been used to analyse future conditions for Helgoland Island Dogger Bank areas Bight. results suggest an increase speed with respect historical period (1950–2005) during winter months, especially westerly...
A nested numerical model system has been set up to realistically simulate almost 40 years of the Indonesian throughflow (ITF). global circulation delivered boundary values for sea surface height, temperature and salinity distribution a fine resolution regional ITF. The results are in good agreement with measured data regarding velocity distribution, stratification as well transported water masses, even though division ITF volume transport into its western eastern branches differs slightly...
In this study, we apply probabilistic estimates of mean sea level (MSL) rise and a sub-set regional climate model ensemble simulations to force numerical the southern North Sea, downscaling projected variability Elbe estuary that serves as prototype for an industrialised meso-tidal estuary. The specific forcing combination enables localised projection future estuarine hydrodynamics accounting spread global due internal variability. Under applied high-emission scenario, shows high decadal...
Abstract The flux of dissolved organic carbon (DOC) from land to sea is an important transfer within the global cycle. biogeochemical fate this terrestrial DOC (tDOC) remains poorly understood and usually neglected in ocean models. Southeast Asia accounts for around 10% tDOC flux, mostly tropical peatland‐draining rivers discharging onto Sunda Shelf. We developed a new light‐driven parameterization remineralization that photochemical, microbial, interactive photochemical–microbial...
A numerical model system was developed and applied to simulate air-sea fluxes of CO2 coral reef calcification in the Indonesian Seas adjacent ocean basin for period 1960 2014 on a fine resolution grid (ca. 11 km) order study their response rising sea water temperatures concentrations atmosphere. Results were analyzed different sub-regions Sunda Shelf (Gulf Thailand, Malacca Strait, Java Sea) show realistic levels, signs pronounced temporal variability flux. The Gulf Thailand changes from an...
Abstract. The seasonal mean and synoptic fluctuation of the wintertime Taiwan Warm Current (TWC) were investigated using a well-validated finite volume community ocean model. spatial distribution dynamics highlighted. TWC has two branches: an inshore branch between 30 100 m isobaths offshore 200 isobaths. Coriolis term is much larger than inertia almost balanced by pressure gradient in both branches, indicating geostrophic balance current. Two areas with significant fluctuations identified...
Abstract. The region of the Sunda Shelf has an average depth approx. 48 m and is subject to many physical biogeochemical processes with a strong impact from human activities. For investigation marine environmental water properties quality, it helpful have idea about exchange rates masses in different parts this region. Four numerical models, global hydrodynamical model MPI-OM, hydrological MPI-HM, regional HAMSOM Lagrangian tracer been utilized estimate flushing residence times seas on...
Abstract. Extratropical cyclones drive midlatitude weather, including extreme events, and determine climate. Their dynamics predictability are strongly shaped by cloud diabatic processes. While the impact due to latent heating is much studied, little known about of radiative (CRH) on extratropical cyclones. Here, we address this question means baroclinic life cycle simulations performed at a convection-permitting resolution 2.5 km with ICON model. The use newly implemented channel setup...
Abstract Combining satellite altimetry and in situ hydrographic measurement, we estimated the cross‐shelf transport (CST) its spatial temporal variations across 200 m isobath East China Sea (ECS) from 1993 to 2014. The vertically integrated CST can be dynamically divided into three parts: surface Ekman transport, geostrophic bottom transport. results show that 22 year‐mean, sectionally 1.7 ± 2.0 Sv (positive on‐shelf direction), comprised of transports 2.7 1.0 0.6 Sv, respectively, are...