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View article: Pollution affects Arabian and Saharan dust optical properties in the eastern Mediterranean
Pollution affects Arabian and Saharan dust optical properties in the eastern Mediterranean Open
Uncertainties in the direct radiative effect of mineral dust result from the variability in its optical properties but are also influenced by mixing with anthropogenic aerosols (“pollution”), e.g., black carbon or sulfates. This study inve…
View article: Variability in hygroscopicity parameter, CCN number concentration and chemical composition of mineral dust-dominated air masses over the Mediterranean Sea
Variability in hygroscopicity parameter, CCN number concentration and chemical composition of mineral dust-dominated air masses over the Mediterranean Sea Open
Airborne mineral dust particles, next to sea salt, are the most abundant aerosol type by mass globally (Andreae, 1995). Not only these particles affect the Earth’s radiation budget, but they also modify cloud properties by serving as…
View article: Reducing Uncertainty in Nuclear Test Detection: An Analysis of Multiple IMS Detections
Reducing Uncertainty in Nuclear Test Detection: An Analysis of Multiple IMS Detections Open
The Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) relies on its International Monitoring System (IMS) to detect radionuclide releases, which can indicate potential nuclear tests. By using atmospheric transport modelling (ATM),…
View article: Characterization of aerosol over the eastern Mediterranean by polarization-sensitive Raman lidar measurements during A-LIFE – aerosol type classification and type separation
Characterization of aerosol over the eastern Mediterranean by polarization-sensitive Raman lidar measurements during A-LIFE – aerosol type classification and type separation Open
Aerosols are key players in Earth's climate system, with mineral dust being a major component of the atmospheric aerosol load. While former campaigns focused on investigating the properties and effects of layers of rather pure mineral dust…
View article: Investigation of Radioxenon Probability Density Functions at IMS Radionuclide Stations Using a Monte Carlo Method for Background Estimation
Investigation of Radioxenon Probability Density Functions at IMS Radionuclide Stations Using a Monte Carlo Method for Background Estimation Open
The International Monitoring System, the primary means of verification of the Comprehensive Nuclear-Test-Ban Treaty, monitors the planet for any sign of a nuclear explosion. Regarding the International Monitoring System radionuclide statio…
View article: Vertical Variability in morphology, chemistry and optical properties of the transported Saharan air layer measured from Cape Verde and the Caribbean
Vertical Variability in morphology, chemistry and optical properties of the transported Saharan air layer measured from Cape Verde and the Caribbean Open
The structural properties of the Saharan air layer (SAL) including chemical, morphological and optical properties were measured during the Saharan Aerosol Longrange TRansport and Aerosol Cloud interaction Experiment (SALTRACE- June/July 20…
View article: FLEXPART version 11: improved accuracy, efficiency, and flexibility
FLEXPART version 11: improved accuracy, efficiency, and flexibility Open
Numerical methods and simulation codes are essential for the advancement of our understanding of complex atmospheric processes. As technology and computer hardware continue to evolve, the development of sophisticated code is vital for accu…
View article: FLEXPART version 11: Improved accuracy, efficiency, and flexibility
FLEXPART version 11: Improved accuracy, efficiency, and flexibility Open
Numerical methods and simulation codes are essential for the advancement of our understanding of complex atmospheric processes. As technology and computer hardware continue to evolve, the development of sophisticated code is vital for accu…
View article: Characterization of the airborne aerosol inlet and transport system used during the A-LIFE aircraft field experiment
Characterization of the airborne aerosol inlet and transport system used during the A-LIFE aircraft field experiment Open
Atmospheric aerosol particles have a profound impact on Earth's climate by scattering and absorbing solar and terrestrial radiation and by impacting the properties of clouds. Research aircraft such as the Deutsches Zentrum für Luft- und Ra…
View article: Supplementary material to "Pollution affects Arabian and Saharan dust optical properties in the Eastern Mediterranean"
Supplementary material to "Pollution affects Arabian and Saharan dust optical properties in the Eastern Mediterranean" Open
S1 Data analysis and quality control of the Aurora 4000 polar nephelometerThe particle scattering coefficients were measured at three wavelengths (λ B = 450 nm, λ G = 525 nm, λ B = 635 nm) using an Aurora 4000 polar nephelometer placed in …
View article: Pollution affects Arabian and Saharan dust optical properties in the Eastern Mediterranean
Pollution affects Arabian and Saharan dust optical properties in the Eastern Mediterranean Open
Uncertainties in the mineral dust’s direct radiative effect arise from the variability in its optical properties. The optical properties can also be influenced by mixing processes with anthropogenic aerosols, such as black carbon or fine p…
View article: FLEXPART-11: Advancements in a Lagrangian Atmospheric Model for Enhanced Accuracy, Efficiency, and Flexibility
FLEXPART-11: Advancements in a Lagrangian Atmospheric Model for Enhanced Accuracy, Efficiency, and Flexibility Open
Numerical methods and advanced simulation codes play a crucial role in helping us understand complex atmospheric processes. As technology progresses, it's important to develop sophisticated code for accurate and efficient simulations. In t…
View article: Estimation of unknown source term based on radioxenon observations with the presence of background signal
Estimation of unknown source term based on radioxenon observations with the presence of background signal Open
The identification of a sample associated with a nuclear test is a challenging task for the CTBTO because of the presence of a noble gas background in the constant evolving atmosphere. This background is caused by nuclear power plants, nuc…
View article: Comment on egusphere-2024-140
Comment on egusphere-2024-140 Open
Abstract. Aerosols are key players in the Earth’s climate system with mineral dust being one major component of the atmospheric aerosol load. While former campaigns focused on investigating the properties and effects of rather pure mineral…
View article: Comment on egusphere-2024-140
Comment on egusphere-2024-140 Open
Abstract. Aerosols are key players in the Earth’s climate system with mineral dust being one major component of the atmospheric aerosol load. While former campaigns focused on investigating the properties and effects of rather pure mineral…
View article: Characterization of aerosol over the Eastern Mediterranean by polarization sensitive Raman lidar measurements during A-LIFE – aerosol type classification and type separation
Characterization of aerosol over the Eastern Mediterranean by polarization sensitive Raman lidar measurements during A-LIFE – aerosol type classification and type separation Open
Aerosols are key players in the Earth’s climate system with mineral dust being one major component of the atmospheric aerosol load. While former campaigns focused on investigating the properties and effects of rather pure mineral dust laye…
View article: Investigation on atmospheric radioactivity sample association using consistency with isotopic ratio decay over time at IMS radionuclide stations
Investigation on atmospheric radioactivity sample association using consistency with isotopic ratio decay over time at IMS radionuclide stations Open
For the enhancement of the International Data Centre's products, specifically the Standard Screened Radionuclide Event Bulletin, an important step is to establish methods to associate the detections of the Comprehensive Nuclear-Test-Ban Tr…
View article: Comment on egusphere-2023-439
Comment on egusphere-2023-439 Open
Abstract. Atmospheric aerosol particles have a profound impact on Earth’s climate by scattering and absorbing solar and terrestrial radiation and by impacting the properties of clouds. Research aircraft such as the Deutsches Zentrum für Lu…
View article: Characterization of the airborne aerosol inlet and transport system used during the A-LIFE aircraft field experiment
Characterization of the airborne aerosol inlet and transport system used during the A-LIFE aircraft field experiment Open
Atmospheric aerosol particles have a profound impact on Earth’s climate by scattering and absorbing solar and terrestrial radiation and by impacting the properties of clouds. Research aircraft such as the Deutsches Zentrum für Luft- und Ra…
View article: Characterization of CTBT-Relevant Radioxenon Detections at IMS Stations Using Isotopic Activity Ratio Analysis
Characterization of CTBT-Relevant Radioxenon Detections at IMS Stations Using Isotopic Activity Ratio Analysis Open
Radioxenon isotopes measured at radionuclide stations of the Comprehensive Nuclear-Test-Ban Treaty’s (CTBT) International Monitoring System (IMS) may indicate releases from underground nuclear explosions (UNEs) but are often caused by emis…
View article: Advancing the Support to the Radionuclide Monitoring Verification Technology of the CTBT with the 1st Nuclear Explosion Signal Screening Open Intercomparison Exercise 202
Advancing the Support to the Radionuclide Monitoring Verification Technology of the CTBT with the 1st Nuclear Explosion Signal Screening Open Intercomparison Exercise 202 Open
Radionuclide monitoring is one of the verification technologies of the global verification system of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). This global network of sampling stations senses the air 24/7 for suspect noble gases and…
View article: Characterisation of Xe-133 background at the IMS stations in the East Asian region: Insights based on known sources and atmospheric transport modelling
Characterisation of Xe-133 background at the IMS stations in the East Asian region: Insights based on known sources and atmospheric transport modelling Open
Radioxenon can be produced with a high fission yield during a nuclear explosion, making it an important tracer to demonstrate the nuclear origin of an explosion. For this reason, it is continuously monitored by the Comprehensive Nuclear-Te…
View article: A demonstration of CTBTO’s capability to identify the possible source region of the specific case of DPRK announced tests by conducting a sensitivity study using high-resolution ATM 
A demonstration of CTBTO’s capability to identify the possible source region of the specific case of DPRK announced tests by conducting a sensitivity study using high-resolution ATM  Open
<p>Detection of radionuclides released from a nuclear explosion is an essential task mandated by the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Atmospheric transport modelling (ATM) identifies either possible source regions for re…
View article: Sample Association by using Anomalous Concentration Episodes and Decay-Consistent Isotopic Ratios at IMS Radionuclide Stations
Sample Association by using Anomalous Concentration Episodes and Decay-Consistent Isotopic Ratios at IMS Radionuclide Stations Open
<p>For enhancement of the International Data Centre (IDC) products such as the Standard Screened Radionuclide Event Bulletin (SSREB), there is a need to associate the detections of CTBT relevant isotopes in samples at International M…
View article: Quality assessment of the different Possible Source Region (PSR) algorithms
Quality assessment of the different Possible Source Region (PSR) algorithms Open
<p>The operational Atmospheric Transport Modelling (ATM) system deployed and used at CTBTO produces source receptor sensitivity (SRS) fields, which specify the location of the air masses prior to their arrival at any radionuclide sta…
View article: Evaluation of High-Resolution Atmospheric Transport Modelling within the framework of the CTBT with Xe-133 observations in Germany and stack emission data from medical isotope production
Evaluation of High-Resolution Atmospheric Transport Modelling within the framework of the CTBT with Xe-133 observations in Germany and stack emission data from medical isotope production Open
<p>For every atmospheric radionuclide sample taken by the International Monitoring System (IMS) of the Comprehensive Nuclear-Test-Ban Treaty&#160;Organisation&#160;(CTBTO), the CTBTO makes use of operational Atmospheric Trans…
View article: Effects of improved interpolation in the wet-scavenging scheme of FLEXPART
Effects of improved interpolation in the wet-scavenging scheme of FLEXPART Open
<p>The Lagrangian dispersion model FLEXPART v10.4 uses cloud water content, temperature, and precipitation rates to calculate wet scavenging. Currently, only precipitation fields are interpolated spatially to the particle positions. …