Lisbon is the largest urban area in the Western European coast. Due to this geographical position the Atlantic Ocean serves as an important source of particles and plays an important role in many atmospheric processes. The main objectives of this study were to (1) perform a chemical characterization of particulate matter (PM2.5) sampled in Lisbon, (2) identify the main sources of particles, (3)...

The variation of aerosol properties under polluted air masses advection was studied in a semi-rural site in South Italy, by means of SEM-EDX analysis performed on particles collected on 13-stages impactor filters. Radiometric measurements, HYSPLIT back-trajectories and NAAPS maps helped to choose four measurement days of polluted air mass circulation, two of them collected in the warm season (3...

dust particles have dangerous impacts on human health, the environment, and the economy. recently dust storms, originating from arabian countries, have increased remarkably, affecting western and central parts of iran.hysplit model and the mean monthly maps of aai (absorbing aerosol index), surface skin temperature, and top soil layer moisture from omi (ozone measurement instrument) have been u...

Stable isotopes (18O/16O and 2H/1H) are fingerprints of water molecules thus can be used to gain insight on circulation. Especially, the factors controlling isotopic composition precipitation should identified because they act as baseline determinants variations surface groundwater. Here, using HYSPLIT model, we attribute observed isotope different moisture sources characterize meteoric in Nort...

In recent years, smog has been one of the main concerns in heavily populated urban areas like Lahore (Pakistan) and Kanpur (India). Atmospheric pollutants aerosols play an important role smog. this paper, aerosol types are identified episodes, based on Aerosol Robotic Network (AERONET) data, during 4-year period i.e., 2015-2018. Aerosols classified fine mode fraction (FMF) single scattering alb...

This report explores the potential uses of low-yield nuclear weapons in context a possible conflict on Korean Peninsula. It starts with definition – typically, yields ten kilotons or less that are designed to be nonstrategic “tactical” used shorter-range delivery systems, prepared for purpose attacking troops battlefield infrastructure. The paper then reviews history United States legislation r...

Recent ceilometer models are more sensitive to aerosols, which is increasing the interest in these instruments retrieve aerosol optical and microphysical properties. In this paper, a new methodology proposed vertical extinction backscatter profiles from Vaisala CL51 model. This based two parts: first, signal pre-processing with suppression of dark current background noises, correction water vap...

Based on the PM2.5 concentration in autumn and winter of 2015-2019, characteristics urban air pollution eastern monsoon region China were discussed. The spatial distribution interregional influence fine particle under different synoptic weather topography illustrated. According to systems, regional episodes classified into three categories, including Uniform Pressure field (UP, 60.00%), Pre-Hig...

Nowadays, there is no direct evidence about the presence of microplastics (MPs) in atmosphere above ground level. Here, we investigated occurrence, chemical composition, shape, and size MPs aircraft sampling campaigns flying within planetary boundary layer (PBL). The results showed that were present with concentrations ranging from 1.5 m−3 rural areas to 13.9 urban areas. represented up almost ...