A5015439734- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Aeolian processes and effects
- Fire effects on ecosystems
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
- Air Quality Monitoring and Forecasting
- Geophysics and Gravity Measurements
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spacecraft Design and Technology
- Cryospheric studies and observations
- Laser-induced spectroscopy and plasma
- Spacecraft and Cryogenic Technologies
- Geochemistry and Geologic Mapping
- Optical Polarization and Ellipsometry
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Distributed and Parallel Computing Systems
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Plant Water Relations and Carbon Dynamics
- Precipitation Measurement and Analysis
Leibniz Institute for Tropospheric Research
2016-2025
Leibniz Association
2013-2016
National Research Council - Institute of Methodologies for Environmental Analysis
2008
Istituto Nazionale per la Fisica della Materia
2004
Aristotle University of Thessaloniki
2004
Russian Academy of Sciences
2002
Goddard Space Flight Center
2002
L3S Research Center
1991-1993
Abstract The collective representation within global models of aerosol, cloud, precipitation, and their radiative properties remains unsatisfactory. They constitute the largest source uncertainty in predictions climatic change hamper ability numerical weather prediction to forecast high-impact events. joint European Space Agency (ESA)–Japan Aerospace Exploration (JAXA) Earth Clouds, Aerosol Radiation Explorer (EarthCARE) satellite mission, scheduled for launch 2018, will help resolve these...
Height profiles of the extinction and backscatter coefficients in cirrus clouds are determined independently from elastic- inelastic- (Raman) signals. An extended error analysis is given. Examples covering measured range extinction-to-backscatter ratios (lidar ratios) ice presented. Lidar between 5 15 sr usually found. A strong variation 2 20 can be observed within one cloud profile. Particle inelastic-backscatter signals elastic-backscatter by using Klett method compared. The solution...
We summarize our Raman lidar observations which were carried out in Europe, Asia, and Africa during the past 10 years, with focus on particle extinction‐to‐backscatter ratios (lidar ratios) Ångström exponents. For first time, we present statistics for almost all climatically relevant aerosol types solely based measurements. Sources of continental particles North America Sahara, south Southeast east Asia. The Atlantic Ocean, tropical South Indian Ocean sources marine particles. are...
Abstract. The European Aerosol Research Lidar Network, EARLINET, was founded in 2000 as a research project for establishing quantitative, comprehensive, and statistically significant database the horizontal, vertical, temporal distribution of aerosols on continental scale. Since then EARLINET has continued to provide most extensive collection ground-based data aerosol vertical over Europe. This paper gives an overview network's main developments since introduces dedicated special issue,...
The spread of mineral particles over southwestern, western, and central Europe resulting from a strong Saharan dust outbreak in October 2001 was observed at 10 stations the European Aerosol Research Lidar Network (EARLINET). For first time, an optically dense desert plume characterized coherently with high vertical resolution on continental scale. main layer located above boundary (above 1‐km height sea level (asl)) up to 3–5‐km height, traces reached heights 7–8 km. particle optical depth...
A method is proposed that permits one to retrieve physical parameters of tropospheric particle size distributions, e.g., effective radius, volume, surface-area, and number concentrations, as well the mean complex refractive index on a routine basis from backscatter extinction coefficients at multiple wavelengths. The optical data in terms vertical profiles are derived multiple-wavelength lidar measurements 355, 400, 532, 710, 800, 1064 nm for 355 532 data. algorithm based concept inversion...
Abstract. A global vertically resolved aerosol data set covering more than 10 years of observations at 20 measurement sites distributed from 63° N to 52° S and 72° W 124° E has been achieved within the Raman polarization lidar network PollyNET. This consists portable, remote-controlled multiwavelength-polarization-Raman lidars (Polly) for automated continuous 24/7 clouds aerosols. PollyNET is an independent, voluntary, scientific network. All Polly feature a standardized instrument design...
Abstract. The atmospheric science community demands autonomous and quality-assured vertically resolved measurements of aerosol cloud properties. For this purpose, a portable lidar called Polly was developed at TROPOS in 2003. system continuously improved with gained experience from the EARLINET community, involvement worldwide field campaigns, international institute collaborations within last 10 years. Here we present recent changes setup multiwavelength Raman polarization PollyXT discuss...
A strategy for European Aerosol Research Lidar Network (EARLINET) correlative measurements Cloud‐Aerosol and Infrared Pathfinder Satellite Observation (CALIPSO) has been developed. These EARLINET started in June 2006 are still progress. Up to now, more than 4500 files available the database. Independent extinction backscatter carried out at high‐performance stations have used a quantitative comparison with CALIPSO level 1 data. Results demonstrate good performance of absence evident biases...
The optically thickest volcanic ash plume ever measured over Germany was monitored with multiwavelength Raman lidars and Sun photometer at Leipzig Munich. When this layer, originating from the Eyjafjoll eruptions in southern Iceland, crossed between 2.5 6 km height on 16 April 2010, total 500 nm aerosol optical depth reached 1.0, ash–related about 0.7. Volume light–extinction coefficients (40–75–minute mean values) Munich 355 532 values of 400–600 Mm −1 mass concentrations were order 1000 ±...
A combined lidar-photometer method that permits the retrieval of vertical profiles ash and non-ash (fine-mode) particle mass concentrations is presented.By using a polarization lidar, contributions particles to total backscattering extinction are separated.Sun photometer measurements ratio volume concentration optical thickness (AOT) for fine coarse mode then used convert coefficients into respective fine-mode concentrations.The applied European Aerosol Research Lidar Network (EARLINET)...
Abstract. In this study we use a new dust product developed using CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) observations EARLINET (European Aerosol Research Network) measurements methods to provide 3-D multiyear analysis on the evolution of Saharan over North Africa Europe. The uses L2 backscatter corrected with depolarization-based method separate pure in external aerosol mixtures lidar ratio (LR) based long-term calculate extinction profiles. methodology...
Abstract In September 2020, extremely strong wildfires in the western United States of America (i.e., mainly California) produced large amounts smoke, which was lifted into free troposphere. These biomass‐burning‐aerosol (BBA) layers were transported from US west coast toward central Europe within 3–4 days turning sky milky and receiving high media attention. The present study characterizes this pronounced smoke plume above Leipzig, Germany, using a ground‐based...
Abstract The Aerosol, Clouds and Trace Gases Research Infrastructure (ACTRIS) officially became the 33rd European Consortium (ERIC) on 25 April 2023 with support of 17 founding member observer countries. As a pan-European legal organization, ACTRIS ERIC will coordinate provision data products short-lived atmospheric constituents clouds relevant to climate air pollution over next 15–20 years. was designed more than decade ago, its development funded at national levels. It included in Strategy...
In August 1998, severe forest fires occurred in many parts of Canada, especially the Northwest Territories. week from 5 to 11, more than 1000 different burned >1 × 10 6 ha boreal forest, highest 1‐week sum ever reported throughout 1990s. this study we can unambigously show for first time that these caused pronounced large‐scale haze layers above Europe and they influenced concentrations carbon monoxide other trace gases at surface station Mace Head Ireland over a period weeks. Transport...
We present an inversion algorithm for the retrieval of particle size distribution parameters, i.e., mean (effective) radius, number, surface area, and volume concentration, complex refractive index from multiwavelength lidar data. In contrast to classical Tikhonov method, which accepts only that solution discrepancy reaches its global minimum, in our we perform averaging solutions vicinity this minimum. This stabilizes underlying ill-posed inverse problem, particularly with respect number...
The range-dependent overlap between the laser beam and receiver field of view a lidar can be determined experimentally if pure molecular backscatter signal is measured in addition to usually observed elastic signal, which consists component particle component. Two methods, direct determination profile an iterative approach, are presented applied measurement. accounts for actual system alignment all parameters that not explicitly known, such as divergence spatial intensity distribution light.
Dual‐wavelength Raman lidar observations were regularly carried out at Leipzig (51.3°N, 12.4°E) from May to August 2003. The measurements showed that particle backscatter and extinction coefficients in the free troposphere higher compared values 2000–2002. Backward dispersion modeling indicates intense forest fires occurred Siberia Canada spring/summer 2003 main cause of these tropospheric haze layers. Measurements on 3 days selected for an optical microphysical characterization well‐aged...
Abstract. In May 2003, severe forest fires in southeast Russia resulted smoke plumes extending widely across the Northern Hemisphere. This study combines satellite data from a variety of platforms (Moderate Resolution Imaging Spectroradiometer (MODIS), Sea-viewing Wide Field-of-view Sensor (SeaWiFS), Earth Probe Total Ozone Mapping Spectrometer (TOMS) and Global Monitoring Experiment (GOME)) vertical aerosol profiles derived with Raman lidar measurements results Lagrangian particle...
An intercomparison of the algorithms used to retrieve aerosol extinction and backscatter starting from Raman lidar signals has been performed by 11 groups scientists involved in European Aerosol Research Lidar Network (EARLINET). This is part an extended quality assurance program on lidars EARLINET. instruments were tested separately. The use synthetic data, simulated at 355, 532, 386, 607 nm, with realistic experimental atmospheric conditions taken into account. demonstrates that...
During the Lindenberg Aerosol Characterization Experiment (LACE 98) simultaneous measurements with ground‐based and airborne lidars two aircraft equipped aerosol in situ instrumentation were performed. From lidar measurements, particle backscatter coefficients at up to eight wavelengths between 320 1064 nm extinction 2–3 292 532 determined. Thus, for first time, an extensive set of optical properties from several platforms was available inversion into microphysical quantities. For this...
An intercomparison of aerosol backscatter lidar algorithms was performed in 2001 within the framework European Aerosol Research Lidar Network to Establish an Climatology (EARLINET). The objective this research test correctness and influence ratio used by various teams involved EARLINET for calculation backscatter-coefficient profiles from signals. exercise consisted processing synthetic signals degrees difficulty. One these contained height-dependent ratios vertical those on retrieval...
For the first time, height profiles of extinction‐to‐backscatter ratio (lidar ratio) desert dust particles were simultaneously measured at 355 and 532 nm. The observations performed with an advanced Raman lidar during two long‐range Saharan outbreaks Leipzig, Germany (51.3°N, 12.4°E), in August October 2001. Measured desert‐dust ratios are needed for a proper profiling climate‐relevant volume extinction coefficient widely used standard backscatter lidars. Unexpectedly large ratios, mainly...
In the framework of European Aerosol Research Lidar Network to Establish an Climatology (EARLINET), 19 aerosol lidar systems from 11 countries were compared. extinction or backscatter coefficient profiles measured by at least two for each comparison. coefficients derived Raman measurements in UV (351 355 nm), and calculated pure elastic 351 355, 532, 1064 nm. The results compared height ranges with high low content. Some additionally sunphotometers starphotometers. Predefined maximum...