A5087177528- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Solar and Space Plasma Dynamics
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Planetary Science and Exploration
- Impact of Light on Environment and Health
- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- Climate variability and models
- Methane Hydrates and Related Phenomena
- Geophysics and Sensor Technology
- Calibration and Measurement Techniques
- GNSS positioning and interference
- Spaceflight effects on biology
- Advanced Optical Sensing Technologies
- Ocean Waves and Remote Sensing
- Aeolian processes and effects
- Geomagnetism and Paleomagnetism Studies
- Stellar, planetary, and galactic studies
- Wind Energy Research and Development
Czech Academy of Sciences, Institute of Atmospheric Physics
2014-2024
Leibniz Institute of Atmospheric Physics at the Rostock University
2015-2024
University of Rostock
2005-2024
Leibniz Association
2006-2014
Leibniz Institute for Neurobiology
2004-2005
University of Bonn
2000-2002
Abstract The eruption of the submarine Hunga volcano in January 2022 was associated with a powerful blast that injected volcanic material to altitudes up 58 km. From combination various types satellite and ground-based observations supported by transport modeling, we show evidence for an unprecedented increase global stratospheric water mass 13% relative climatological levels, 5-fold aerosol load, highest last three decades. Owing extreme injection altitude, plume circumnavigated Earth only...
Abstract. A direct detection Doppler lidar for measuring wind speed in the middle atmosphere up to 80 km with 2 h resolution was implemented ALOMAR Rayleigh/Mie/Raman (69° N, 16° E). The random error of line sight is about 0.6 m/s and 10 at 49 km, respectively. We use a Rayleigh Iodine Spectrometer (DoRIS) iodine 1109 (~532.260 nm). DoRIS uses two branches intensity cascaded channels cover dynamic range from 100 altitude. system designed extend existing multi-wavelength observations aerosol...
Abstract. We report on the development and current capabilities of ALOMAR Rayleigh/Mie/Raman lidar. This instrument is one core instruments international facility, located near Andenes in Norway at 69°N 16°E. The major task to perform advanced studies Arctic middle atmosphere over altitudes between about 15 90 km a climatological basis. These address questions thermal structure atmosphere, dynamical processes acting therein, aerosols form stratospheric background aerosol, polar clouds,...
Model results of mesospheric ice layers and background conditions at 69°N from 1961 to 2008 are analyzed. The model nudges European Centre for Medium‐Range Weather Forecasts data below ∼45 km. Greenhouse gas concentrations in the mesosphere kept constant. At polar cloud (PMC) altitudes (83 km) temperatures decrease until mid 1990s by ‐0.08 K/yr resulting trends PMC brightness, occurrence rates, and, a lesser extent, (−0.0166 km/yr). Ice layer consistent with observations ground‐based...
Abstract Noctilucent clouds (NLCs) have been imaged during two nights in summer 2009 from northern Germany (Kühlungsborn, 54°N) and middle Norway (Trondheim, 64°N). For the first time a horizontal resolution of 10 to 20 m at altitude (about 83 km) temporal about 1 s was achieved. Additional imaging using coarser provided monitoring larger‐scale (~100 structures observed clouds. Two series NLC images are described that reveal apparent Kelvin‐Helmholtz (KH) billow having very different...
We have performed trend studies in the mesosphere period 1961–2009 with Leibniz‐Institute Middle Atmosphere (LIMA) model driven by European Centre for Medium‐Range Weather Forecasts reanalysis below approximately 40 km and adapts temporal variations of CO 2 O 3 according to observations. Temperatures mesosphere/lower thermosphere vary nonuniformly time, mainly due influence . Here we analyze contribution varying concentrations temperature mesosphere. It is important distinguish between...
Abstract Little is known about climate change effects in the transition region between Earth's atmosphere and space, roughly at 80–120 km. Some of earliest observations this come from noctilucent clouds (NLC) ∼83‐km altitude. There a long‐standing dispute whether NLC are indicators change. We use model simulations for time period 138 years to study impact increasing CO 2 H O on development centennial scales. Since beginning industrialization water vapor concentration mixing ratio heights has...
Abstract. Gravity waves (GWs) as well solar tides are a key driving mechanism for the circulation in Earth's atmosphere. The propagation of gravity is strongly affected by tidal they modulate mean background wind field and vice versa, which not yet fully understood adequately implemented many models. daylight-capable Rayleigh–Mie–Raman (RMR) lidar at Kühlungsborn (54∘ N, 12∘ E) typically provides temperature data to investigate both wave phenomena during one full day or several consecutive...
Abstract We analyze quiet‐time data from the Gravity Field and Ocean Circulation Explorer satellite as it overpassed Southern Andes at z ≃275 km on 5 July 2010 23 UT. extract 20 largest traveling atmospheric disturbances density perturbations cross‐track winds using Fourier analysis. Using gravity wave (GW) dissipative theory that includes realistic molecular viscosity, we search parameter space to determine which hot spot are GWs. This results in identification of 17 GWs having horizontal...
Trends derived from the Leibniz-Institute Middle Atmosphere Model (LIMA) and MIMAS ice particle model (Mesospheric Ice Microphysics And tranSport model) are presented for a period of 138 years (1871–2008) middle, high, arctic latitudes, namely 58°N, 69°N, 78°N, respectively. We focus on analysis mesospheric layers (NLC, noctilucent clouds) in main summer season (July) yearly mean values. runs with without an increase carbon dioxide water vapor (from methane oxidation) concentrations...
Abstract We present gravity wave climatologies based on 7 years (2012–18) of lidar and Sounding the Atmosphere using Broadband Emission Radiometry (SABER) temperatures reanalysis data at 54° 69°N in altitude range 30–70 km. use 9452 (5044) h observations Kühlungsborn [Arctic Lidar Observatory for Middle Research (ALOMAR)]. Filtering according to vertical wavelength ( λ z < 15 km) or period τ 8 h) is applied. Gravity potential energy densities (GWPED) per unit volume E pV ) mass pm are...
Abstract We analyze the gravity waves (GWs) observed by a Rayleigh lidar at Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) (16.08°E, 69.38°N) in Norway z ∼ 20–85 km on 12–14 January 2016. These GWs propagate upward and downward away from knee = 57 64 horizontally‐displaced location with periods τ r 5–10 hr vertical wavelengths λ 9–20 km. Because hodographs are distorted, we introduce an alternative method to determine GW parameters. find that these medium large‐scale,...
Noctilucent clouds (NLC) have been observed by a multicolor lidar in northern Norway (69°N, 16°E). From three backscatter coefficients we calculate the parameters of monomodal particle size distribution. We deduce mean distribution, width, and average number density ensemble. Using at peak layer above ALOMAR is investigated comparing observations with model results for spherical aspherical particles assuming either lognormal or Gaussian analysis 645 soundings (142 h measurements) find that...
Abstract. Noctilucent clouds (NLC) have been measured by the Rayleigh/Mie/Raman-lidar at ALOMAR research facility in Northern Norway (69° N, 16° E). From 1997 to 2010 NLC were detected during more than 1850 h on 440 different days. Colocated MF-radar measurements and calculations with Leibniz-Institute Middle Atmosphere (LIMA-) model are used characterize background atmosphere. Temperatures as well horizontal winds 83 km altitude show distinct differences observations compared when absent....
Abstract We report on the first observation of persistent inertia gravity wave signatures in horizontal wind and temperature by Doppler Rayleigh lidar middle atmosphere. The observations were performed at Arctic Lidar Observatory for Middle Atmosphere Research station northern Norway (69°N,16°E) between 21 23 January 2012. measurements cover altitude range from 20 km to about 80 during nighttime 70 daytime. observe amplitudes 5 25 m/s 1 8 K temperature, respectively. measured kinetic...
Abstract. We present the first measurements of simultaneous horizontal and vertical winds using a new lidar system developed at Leibniz Institute Atmospheric Physics in Kühlungsborn, Germany (54.12° N, 11.77° E), for concept Vertical And Horizontal COverage by LIdars (VAHCOLI). describe technical details multi-field-of-view (MFOV) upgrade, which allows measurement wind dynamics transition region from microscale to mesoscale (103–104 m). The method was applied edge developing high-pressure...
Using the Doppler-Rayleigh lidars at K&#252;hlungsborn (54&#176;N, 12&#176;E) and ALOMAR (69&#176;&#8201;N, 16&#176;&#8201;E), we have obtained simultaneous vertical profiles of horizontal wind temperature on poleward flank Polar Night Jet. This study presents a case where modified hodograph technique was applied to identify quasi-monochromatic gravity waves within high speed regime jet's flank. Our analysis reveals reduction in wave kinetic potential energy core...
Ablating meteoroids form a well-known layer of metal atoms in the middle atmosphere between about 80 km and more than 100 altitude. Some these metals, like sodium, iron, potassium, or calcium, have been observed for decades by lidar. They are now often used resonance lidar measurements temperature winds as tracers dynamics coupling with ionosphere. Atomic lithium has rarely so far because natural abundance is very low, backscatter signal. Early observations late 1970s above southern France...
Precise knowledge of winds and temperatures in the middle atmosphere is critical for localization characterization infrasound sources. We present concept, design, measurement capabilities a compact, mobile Doppler lidar system developed at Leibniz Institute Atmospheric Physics (IAP). This system, designed Doppler-Mie, -Rayleigh, -resonance measurements atmosphere.The daylight-capable instrument features compact volume about 1 m&#179; engineered easy deployment as part an array units....
Despite significant progress in observational and theoretical studies on gravity wave (GW) dynamics, gaps remain characterizing their variability accurately representing impact the average state of atmosphere models. In particular, there is an altitudinal gap estimating kinetic potential energy spectra GWs between 30 70 km. This study investigates seasonal variations GW using high-resolution temperature horizontal wind data recorded over seven years (2017-2023) by a Doppler Rayleigh lidar at...
We present the development progress of our compact multi-field-of-view lidar units for investigating small- to large-scale processes in atmosphere. Matched narrowband laser and receiver enable precise daylight aerosol measurements with high visibility Doppler wind sensitivity troposphere/stratosphere above. recent results focus on extended measurement capabilities transportable systems.Daylight capable lidars are complex systems particularly as arrays require automated functionality. To...