Ivo Kalapov
A5040317995- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Solar and Space Plasma Dynamics
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Solar Radiation and Photovoltaics
- Marine and environmental studies
- Aeolian processes and effects
- Cryospheric studies and observations
- Radiation Effects in Electronics
- Winter Sports Injuries and Performance
- Lightning and Electromagnetic Phenomena
- Ionosphere and magnetosphere dynamics
- Particle Accelerators and Free-Electron Lasers
- Earthquake Detection and Analysis
- Nuclear and radioactivity studies
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Aerospace and Aviation Technology
- Radioactivity and Radon Measurements
- Synthetic Aperture Radar (SAR) Applications and Techniques
- International Science and Diplomacy
Institute for Nuclear Research and Nuclear Energy
2009-2021
Bulgarian Academy of Sciences
2011-2021
Abstract. Two years of harmonized aerosol number size distribution data from 24 European field monitoring sites have been analysed. The results give a comprehensive overview the near surface particle concentrations and distributions between 30 500 nm dry diameter. Spatial temporal aerosols in sizes most important for climate applications are presented. We also analyse annual, weekly diurnal cycles concentrations, provide log-normal fitting parameters median distributions, guidance notes...
Abstract. Aerosol particles are essential constituents of the Earth's atmosphere, impacting earth radiation balance directly by scattering and absorbing solar radiation, indirectly acting as cloud condensation nuclei. In contrast to most greenhouse gases, aerosol have short atmospheric residence times, resulting in a highly heterogeneous distribution space time. There is clear need document this variability at regional scale through observations involving, particular, situ near-surface...
Abstract. Knowledge of aerosol size and composition is important for determining radiative forcing effects aerosols, identifying sources improving satellite retrieval algorithms. The ability to extrapolate composition, or type, from intensive optical properties can help expand the current knowledge spatiotemporal variability in type globally, particularly where chemical measurements do not exist concurrently with property measurements. This study uses medians scattering Ångström exponent...
Abstract. This paper presents the light-scattering properties of atmospheric aerosol particles measured over past decade at 28 ACTRIS observatories, which are located mainly in Europe. The data include particle light scattering (σsp) and hemispheric backscattering (σbsp) coefficients, Ångström exponent (SAE), backscatter fraction (BF) asymmetry parameter (g). An increasing gradient σsp is observed when moving from remote environments (arctic/mountain) to regional urban environments. At a...
Abstract To estimate global aerosol radiative forcing, measurements of optical properties are made by the National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory (ESRL)’s Global Monitoring Division (GMD) their collaborators at 30 monitoring locations around world. Many sites located in regions influenced specific types (Asian Saharan desert dust, Asian pollution, biomass burning, etc.). This network stations is a shared endeavor NOAA many collaborating...
Abstract. High altitude stations are often emphasized as free tropospheric measuring sites but they remain influenced by atmospheric boundary layer (ABL) air masses due to convective transport processes. The local and meso-scale topographical features around the station involved in development formation of thermally induced winds leading ABL lifting. alone is not a sufficient parameter characterize influence. In this study, topography analysis performed allowing calculation newly defined...
Abstract. Aerosol particles are a complex component of the atmospheric system which influence climate directly by interacting with solar radiation, and indirectly contributing to cloud formation. The variety their sources, as well multiple transformations they may undergo during transport (including wet dry deposition), result in significant spatial temporal variability properties. Documenting this is essential provide proper representation aerosols condensation nuclei (CCN) models. Using...
Abstract. Cluster~analysis of particle number size distributions from~background sites across Europe~is presented. This generated a total nine clusters which could be further combined into two main groups, namely: south-to-north category (four clusters) and west-to-east (five clusters). The first group was identified as most frequently being detected inside around northern Germany neighbouring countries, showing clear evidence local afternoon nucleation growth events that linked to movement...
Abstract. Aerosol particles are a complex component of the atmospheric system that influences climate directly by interacting with solar radiation, and indirectly contributing to cloud formation. The variety their sources, as well multiple transformations they may undergo during transport, result in significant spatial temporal variability properties. Documenting this is essential provide proper representation aerosols condensation nuclei (CCN) models. Using measurements conducted 2016 or...
Abstract. Two years of harmonized aerosol number size distribution data from 24 European field monitoring sites have been analysed. The results give a comprehensive overview the near surface particle concentrations and distributions between 30 500 nm dry diameter. Spatial temporal aerosols in sizes most important for climate applications are presented. We also analyse annual, weekly diurnal cycles concentrations, provide log-normal fitting parameters median distributions, guidance notes...
Abstract. This paper presents the light scattering properties of atmospheric aerosol particles measured over past decade at 28 ACTRIS observatories, located mainly in Europe. The data include particle (σsp) and hemispheric backscattering (σbsp) coefficients, Ångström exponent (SAE), backscatter fraction (BF) asymmetry parameter (g). A large range ssp was observed across network. Low values were on average Nordic Baltic countries Western Europe whereas highest σsp regional sites eastern...
Abstract. High altitude stations are often emphasized as free tropospheric measuring sites but they remain influenced by atmospheric boundary layer (ABL) air masses due to convective transport processes. The local and meso-scale topographical features around the station involved in development formation of thermally induced winds leading ABL lifting. is not a sufficient parameter characterize influence. Topography data from global digital elevation model GTopo30 were used calculate 5...
Abstract. Aerosol particles are essential constituents of the Earth’s atmosphere, impacting earth radiation balance directly by scattering and absorbing solar radiation, indirectly acting as cloud condensation nuclei. In contrast to most greenhouse gases, aerosol have short atmospheric residence time resulting in a highly heterogeneous distribution space time. There is clear need document this variability at regional scale through observations involving, particular, in-situ near-surface...
Abstract. Knowledge of aerosol size and composition is important for determining radiative forcing effects aerosols, identifying sources, improving satellite retrieval algorithms. The ability to extrapolate composition, or type, from intensive optical properties can help expand the current knowledge spatio-temporal variability type globally, particularly where chemical measurements do not exist concurrently with property measurements. This study uses medians scattering Ångström exponent...
Abstract. Cluster analysis of particle number size distributions from background sites across Europe is presented. This generated a total nine clusters which could be further combined into two main groups, namely: South to North category (four clusters) and West East (five clusters). The first was identified as most frequently being detected inside around Northern Germany neighbouring countries, showing clear evidence local afternoon nucleation growth events that linked movement air masses...