48 Articles found
Droplet Measurement Technologies (DMT) Articles
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Mining Emissions Effectively Monitored with Micro Pulse LiDAR Technology
Micro Pulse LiDAR is an effective tool for monitoring and measuring dust and emissions produced by mining operations. Mining operations include blasting, excavating, scraping, and sifting large amounts of dirt. These activities create dust and ...
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Characterization of black carbon-containing fine particles in Beijing during wintertime
Abstract. Refractory black carbon (BC) is a product of incomplete combustion of fossil fuel, biomass and biofuel. etc. By mixing with other species. BC can play significant roles in climate change, visibility impairment and human health. Such ...
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Aircraft-based measurements of High Arctic springtime aerosol show evidence for vertically varying sources, transport and composition
Abstract. The sources, chemical transformations and removal mechanisms of aerosol transported to the Arctic are key factors that control Arctic aerosol–climate interactions. Our understanding of sources and processes is limited by a lack of ...
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Aerosol influences on low-level clouds in the West African monsoon
Abstract: Low-level clouds (LLC) cover a wide area of southern West Africa (SWA) during the summer monsoon months, and have an important cooling effect on the regional climate. Previous studies of these clouds have focused on modelling and ...
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Deposition of ionic species and black carbon to the Arctic snow pack: Combining snow pit observations with modeling
Abstract. Although aerosols in the Arctic have multiple and complex impacts on the regional climate, their removal due to deposition is still not well quantified. We combined meteorological, aerosol, precipitation, and snow pack observations with ...
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Seasonal contrast in size distributions and mixing state of black carbon and its association with PM1.0 chemical composition from the eastern coast of India
Abstract Over the Indian region, aerosol absorption is considered to have potential impact on regional climate, monsoon and hydrological cycle. Black carbon (BC) is the dominant absorbing aerosol, whose absorption potential is largely determined by ...
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Mixing characteristics of refractory black carbon aerosols determined by a tandem CPMA-SP2 system at an urban site in Beijing
Abstract Black carbon aerosols play an important role in climate change by absorbing solar radiation and degrading visibility. In this study, the mixing state of refractory black carbon (rBC) at an urban site in Beijing was studied with a single 15 ...
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Supercooled Liquid Water is Hazardous to Your Health!
What is Supercooled Liquid Water? Supercooled Liquid Water (SLW) refers to water droplets in a cloud that can stay in a liquid state at below freezing temperatures. If an airplane flies into these SLW droplets, icing on the wings and airframe ...
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Multiple Instruments Work Together for a Better View of Air Quality
Accurately identifying and quantifying particulate matter (PM) in the atmosphere is key to determining air quality. Researchers are particularly interested in PM that have a diameter of less than 2.5 micrometers because they are believed to ...
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Machine learning for improved data analysis of biological aerosol using the WIBS
Abstract. Primary biological aerosol including bacteria, fungal spores and pollen have important implications for public health and the environment. Such particles may have different concentrations of chemical fluorophores and will respond ...
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Contrasting physical properties of black carbon in urban Beijing between winter and summer
Black carbon )BC) is known lo have major impacts on both human health and climate. The populated megacity represents (he most complex anthropogenic BC emissions where the sources and related impacts are very uncertain. This study provides source ...
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Researchers are Advancing Science using Micro Pulse LiDAR Technology
There are so many examples of interesting research using Micro Pulse LiDAR (MPL) technology it is difficult to decide on my favorites; however, I have chosen to highlight the following two papers because these applications for the MPL and MiniMPL ...
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Temporal variations in the hygroscopicity and mixing state of black carbon aerosols in a polluted megacity area
Abstract. Black carbon (BC) aerosols in the atmosphere strongly affect radiative forcing. They are mainly removed from the air by wet deposition, and their lifetime is controlled by their water uptake ability or hygroscopicity, which is a function ...
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Top 5 Differences Between Micro Pulse LiDAR and Ceilometer Technology
If you are evaluating backscatter LiDAR sensors for measuring aerosols, cloud vertical structure, and planetary boundary layer (PBL) heights, what factors should you consider in your comparison? It really comes down to a choice between the ...
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Concentration, temporal variation, and sources of black carbon in the Mt. Everest region retrieved by real-time observation and simulation
Abstract. Based on the high-resolution measurement of black carbon (BC) at the Qomolangma (Mt. Everest) Station (QOMS, 28.36◦ N, 86.95◦ E, 4276 m a.s.l.) from 15 May 2015 to 31 May 2017, we investigated the seasonal and diurnal ...
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Characterizing the evolution of physical properties and mixing state of black carbon particles: from near a major highway to the broader urban plume in Los Angeles
Abstract. Black carbon (BC) particles can have deleterious human health consequences and impact regional and global climate. Uncertainties remain in part due to incomplete knowledge on the evolution of physical properties and mixing state of black ...
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Planetary Boundary Layer: Why Is It Important?
The famous statistician George Box said “All models are wrong, but some are useful”—for calculating air quality indices and emissions estimates this is certainly true. One way to increase the utility of models is to use ...
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Micro Pulse LiDAR: Perfect Tool for Atmospheric Research
Micro pulse style lidars are active remote sensing tools proven to be highly useful in atmospheric research. This style of backscatter lidar has been around for decades; however, incremental improvements in photon counting, sensitivity, ...
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Characterisation of biofluorescent aerosol emissions over winter and summer periods in the United Kingdom
Abstract. Primary biological aerosol panicles (PBAP) are an abundant subset of atmospheric aerosol particles which comprise viruses, bacteria, fungal spores, pollen, and fragments such as plant and animal debris. The abundance and diversity of these ...
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Characterization of steady-state fluorescence properties of polystyrene latex spheres using off- and online spectroscopic methods
Abstract. Fluorescent dyed polystyrene latex spheres (PSLs) are commonly used for characterization and calibration of instruments detecting fluorescence signals from particles suspended in the air and other fluids. Instruments like the Ultraviolet ...