A5028967389- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Atmospheric Ozone and Climate
- Scientific Computing and Data Management
- Meteorological Phenomena and Simulations
- Distributed and Parallel Computing Systems
- Aeolian processes and effects
- Computational Physics and Python Applications
- Air Quality Monitoring and Forecasting
- Anomaly Detection Techniques and Applications
- Vehicle emissions and performance
- Neural Networks and Applications
- Space exploration and regulation
- Odor and Emission Control Technologies
- Generative Adversarial Networks and Image Synthesis
- Particle Dynamics in Fluid Flows
- Fire effects on ecosystems
- Model Reduction and Neural Networks
- Industrial Gas Emission Control
Babeș-Bolyai University
2021-2024
University of Oxford
2019-2023
Laboratoire d'Optique Atmosphérique
2017-2019
Université de Lille
2017-2019
Centre National de la Recherche Scientifique
2017-2019
National Institute of Research and Development for Optoelectronics
2013
Computer simulations are invaluable tools for scientific discovery. However, accurate often slow to execute, which limits their applicability extensive parameter exploration, large-scale data analysis, and uncertainty quantification. A promising route accelerate by building fast emulators with machine learning requires large training datasets, can be prohibitively expensive obtain simulations. Here we present a method based on neural architecture search build even limited number of data. The...
Abstract. Aerosols have a direct effect on the Earth's radiative budget and can also affect cloud development lifetime, aerosols above clouds (AAC) are particularly associated with high uncertainties in global climate models. Therefore, it is prerequisite to improve description understanding of these situations. During austral winter, large loadings biomass burning originating from fires southern African subcontinent lifted transported westwards, across southeastern Atlantic Ocean. The...
Abstract The uncertainty in present‐day anthropogenic forcing is dominated by the strength of contribution from aerosol. Much direct aerosol can be attributed to fraction atmosphere, due a lack historical observations. Here, we present robust relationship between total optical depth and across three multimodel ensembles large single‐model perturbed parameter ensemble. Using observations depth, determine reduced likely range component hence
Abstract. The south-eastern Atlantic Ocean (SEA) is semi-permanently covered by one of the most extensive stratocumulus cloud decks on planet and experiences about one-third global biomass burning emissions from southern Africa savannah region during fire season. To get a better understanding impact these aerosols clouds radiation balance over SEA, latest generation UK Earth System Model (UKESM1) employed. Measurements CLARIFY ORACLES flight campaigns are used to evaluate model,...
Abstract. Large computer models are ubiquitous in the Earth sciences. These often have tens or hundreds of tuneable parameters and can take thousands core hours to run completion while generating terabytes output. It is becoming common practice develop emulators as fast approximations, surrogates, these order explore relationships between inputs outputs, understand uncertainties, generate large ensembles datasets. While purpose surrogates may differ, their development very similar. Here we...
Mining operations produce vast amounts of waste, posing critical geotechnical, environmental, and social risks. The EU Horizon-funded Multiscale Observation Services for Mining-Related Deposits (MOSMIN) project addresses these challenges by developing integrated Earth (EO)-based services that combine satellite, uncrewed aerial vehicle (UAV), in-situ data. These aim to deliver innovative multi-scale, multi-source solutions enhanced environmental geotechnical monitoring as well valorisation,...
Abstract. This study presents a comparison between the retrieval of optical properties aerosol above clouds (AAC) from different techniques developed for A-Train sensors CALIOP/CALIPSO and POLDER/PARASOL. The main objective is to analyse consistency results derived active passive measurements. We compare thickness (AOT) optically thick (cloud (COT) larger than 3) their Ångström exponent (AE). These parameters are retrieved with CALIOP operational method, POLDER polarization method...
Abstract. Aerosol radiative forcing uncertainty affects estimates of climate sensitivity and limits model skill in terms making projections. Efforts to improve the representations physical processes models, including extensive comparisons with observations, have not significantly constrained range possible aerosol values. A far stronger constraint, particular for lower (most-negative) bound, can be achieved using global mean energy balance arguments based on observed changes historical...
Abstract. Simulations of total and polarized cloud reflectance angular signatures such as the ones measured by multi-angular radiometer POLDER3/PARASOL are used to evaluate heterogeneity effects on parameter retrievals. Effects optical thickness, albedo, effective radius variance droplet size distribution aerosol parameters above analyzed. Three different clouds that have same mean thicknesses were generated: first with a flat top, second bumpy top last fractional cover. At small scale (50...
Aerosols influence Earth’s climate by interacting with radiation and clouds. Remote sensing techniques aim to enhance our understanding of aerosol forcing using ground-based satellite retrievals. Despite technological advancements, challenges persist in reducing uncertainties remote sensing. Our study examines retrieval biases MODIS sensors on Terra Aqua satellites compared AERONET measurements. We assess their performance the correlation optical depth (AOD) 14 years data (2010–2023) from 29...
The uncertainty in present-day anthropogenic forcing is dominated by the strength of contribution from aerosol. Much direct aerosol can be attributed to fraction atmosphere, due a lack historical observations. Here we present robust relationship between total optical depth and across two multi-model ensembles large single-model perturbed parameter ensemble. Using observations depth, determine reduced likely range component hence
Abstract. The semi-permanent stratocumulus clouds over the South-eastern Atlantic Ocean (SEA) can act as an “air conditioners” to regional and global climate system. interaction of aerosols become important in this region, lead negative radiative effects, partially offsetting positive forcing greenhouse gases. A key pathway affecting cloud properties is by acting condensation nuclei (CCN). In paper, we use United Kingdom Earth System Model investigate sources CCN (from atmospheric processes...
Abstract. Black carbon aerosols are the second largest contributor to global warming while also being linked respiratory and cardiovascular disease. These particles generally found in smoke plumes originating from biomass burning fossil fuel combustion. They heavily concentrated oil fires, exhibiting ratio of black organic carbon. In this study, we identified analysed derived 30 major industrial events within a 12-year timeframe. To our knowledge, is first study its kind that utilized...
Abstract. The semi-permanent stratocumulus clouds over the south-eastern Atlantic Ocean (SEA) can act as an “air conditioner” to regional and global climate system. interaction of aerosols becomes important in this region lead negative radiative effects, partially offsetting positive forcing greenhouse gases. A key pathway by which affect cloud properties is acting condensation nuclei (CCN). In paper, we use United Kingdom Earth System Model (UKESM1) investigate sources CCN (from emissions...
Abstract. The South-eastern Atlantic Ocean (SEA) is semi-permanently covered by one of the most extensive stratocumulus cloud decks on planet and experiences about one-third global biomass burning emissions from southern Africa savannah region during fire season. To get a better understanding impact these aerosols clouds radiation balance over SEA, latest generation UK Earth System Model (UKESM1) employed. Measurements CLARIFY ORACLES flight campaigns are used to evaluate model,...
Abstract. Aerosol radiative forcing uncertainty affects estimates of climate sensitivity and limits model skill at making projections. Efforts to improve the representations physical processes in models, including extensive comparisons with observations, have not significantly constrained range possible aerosol values. A far stronger constraint, particular for lower (most-negative) bound, can be achieved using global mean energy-balance arguments based on observed changes historical...
This study focuses on the local scale behavior of SO 2 emissions resulting from lignite-combustion thermal power plants.The investigations aimed at monitoring and imissions over a two week period in September 2010.One largest plants Eastern Europe was chosen for using different optoelectronic techniques.Rovinari plant (44 o 54'45"N -23 09'44"E) is one electricity suppliers Romania, having 4 groups 330 MW each, with total installed capacity 1420 located Rovinari-Motru coal mining area along...
Abstract. Simulations of total and polarized cloud reflectance angular signatures such as the ones measured by multi-angular radiometer POLDER3/PARASOL are used to evaluate heterogeneity effects on parameter retrievals. Effects optical thickness, albedo, effective radius variance droplet size distribution aerosol above thickness analyzed. Three different clouds having same mean thicknesses were generated: first one with a flat top, second bumpy top last fractional cover. At small scale (50...
Figure S1.UKESM1 simulated mean organic carbon (OC) during July and August 2016-2017 as (a) the vertically integrated burden (b) profile along latitude of Ascension Island, 8.1° S (the white line in S1. a).The domain a, ranging from 30° to 10° N 40° W E. The grey box map (cloud box) representing cloud areas where averaged low fraction is above 0.58.The TM total CBM box.The contours b specific water content baseline simulation.
Abstract. This study presents a comparison between the retrieval of aerosol above clouds (AAC) optical properties from different techniques developed for A-Train sensors CALIOP and POLDER/PARASOL. The main objective is to analyse consistency results active passive measurements. We assess Aerosol Optical Thickness (AOT) optically thick (Cloud (COT) larger than 3) their Ångström Exponent (AE). These parameters are retrieved with operational method, POLDER polarization method CALIOP-based...
Abstract. Aerosols have a direct effect on the Earth's radiative budget and can also affect cloud development lifetime. The aerosols above clouds (AAC) are particularly associated with high uncertainties in global climate models. Therefore, it is prerequisite to improve description understanding of these situations. During austral winter, large loadings biomass burning originating from fires southern African subcontinent lifted transported long distances westwards, across Southeast Atlantic...