Following the advance announcement which we sent to our distributor network in November 2018, we wish to notify you that the Magee Scientific Aethalometer model AE42 has now been discontinued.
The AE42 was first developed in 1998. The discontinuation of older products allows us to focus on providing our customers with our latest technology and the best solutions to meet their monitoring and research requirements. Many of the applications of the AE42 can be covered even better with the model AE33 Aethalometer, which offers significant improvements in performance, operation, network connectivity and in-field validation to traceable photometric references. Its data is completely equivalent to data from earlier models of Aethalometer, assuring monitoring agencies of continuity for long-term trend analysis. Please contact us for further details and reports.
Our company vision is to offer the best possible technology, instruments and solutions to our customers in scientific research, air-quality monitoring and industrial applications. In 2017 we introduced the Total Carbon Analyzer model TCA08 and we plan to add further new products to our portfolio in the near future. We will keep you informed of the planned replacement product for the ‘Portable’ Aethalometer.
Aerosol will continue to offer service, spare parts and accessories for the AE42 Aethalometer until 2022, based on availability from our suppliers.
Exposure to combustion-derived air pollution aerosols has been shown to have many adverse effects on human health, including the impact of cellular oxidative stress. In this toxicological study we developed a new method to assess the contribution of different sources of ambient aerosols to the oxidative potential (OP) of particulate mass (PM), using a long time series of PM10 samples.
The OP was measured on filter samples collected over a full year in the Alpine valley city of Chamonix (France), using two OP protocols: ascorbic acid (AA) and dithiothreitol (DTT) assays. We used PMF analysis from an advanced source-receptor model to obtain source apportionment, and inverted the OP measurements in order to attribute both an intrinsic OP to the sources and the evolution of the source contributions to OPs over the year.
Our results highlight the importance of both biomass burning and vehicular sources as the major contributors to OP in both assay methods. Significant differences were observed between the DTT and AA protocols. This emphasizes the chemical specificities of these tests and the need for a standardized approach for future studies of the epidemiology or toxicology of PM.
The article was published in Atmospheric Chemistry and Physics:
An apportionment method for the oxidative potential of atmospheric particulate matter sources: application to a one-year study in Chamonix, France
Dr. Irena Ježek of the Aerosol R&D team just published a scientific paper in the prestigious journal Atmospheric Environment titled: “The traffic emission-dispersion model for a Central-European city agrees with measured black carbon apportioned to traffic”. This scientific paper presents a simple methodology for modeling traffic emissions using real world emission factors. Using real-world emission factors in the model is essential, to make the emissions representative of the actual in-use fleet. This is the only way in which emission reduction strategies can be planned, that target vehicles that pollute the most.
The research shows how an improved understanding of traffic emissions and impacts, can lead to improved management and legislative controls. The model’s results were verified with in-situ measurements of Black Carbon apportioned to traffic with the Aethalometer model, and showed excellent agreement. The most efficient emission reduction scenarios were those where the highest polluting vehicles were targeted. Removing 10% of the highest polluting vehicles would reduce BC concentrations in the city center by 39%, and NOx by 33%.
We would like to thank Suzana Pranjc and the Office of Utility, Transport and Spatial Planning of the Municipality of Maribor; the Slovenian Ministry of Infrastructure; the Slovenian Environment Agency; and the Slovenian National Laboratory of Health, Environment and Food; for contributing data to the analyses presented in this pubclication.
This research was supported by the European Social Foundation, (SPIRIT), contract no. P-MR-10/04.
The traffic emission-dispersion model for a Central-European city agrees with measured black carbon apportioned to traffic
Aerosol taking part in ground breaking measurements 7 km above Mt. Everest
The Tibetan Plateau of China is a critical element of the planetary environment. Its influence on global climate had led to its description as the “Third Pole”.
The snow and ice cover of this region in winter-time has a global effect on patterns of long-range atmospheric circulation. Rivers originating in this region flow through, and provide water to, areas containing one-quarter of the world’s population. This region is currently facing a serious problem from high concentrations of pollution, including aerosol particles of “smoke”, which are transported onto the Tibetan Plateau from adjacent areas with high population density and strong emissions. These aerosols can directly impact the ecosystem and vegetation: but more seriously, the darkening of snow and ice can lead to premature thawing and the disappearance of glaciers.
To determine the sources and effects of this pollution, measurements of aerosol particles are essential and necessary. The Institute of Tibetan Plateau Research of the Chinese Academy of Sciences has been measuring aerosols at ground-based monitoring sites across the region for several years. This work will now be expanded to study the atmosphere above the surface using a tethered balloon carrying instruments to measure the flow of pollutants from distant regions. The ground-level measurements, including a station at the Base Camp of Mt. Everest, use Aethalometer ® equipment developed by Aerosol d.o.o. The balloon profiling will use a unique research variant of this instrument, developed in Ljubljana.
The first series of research flights will be performed in May 2018 in the vicinity of Mount Everest. The Chinese research balloon will fly up to an altitude of 15 km above sea level. Data will be transmitted to the ground in real time, to allow the balloon operators to optimize the flying conditions. Dr. Matjaž Kobal, Head of R&D at Aerosol, will participate in the Mt. Everest balloon flight research program to operate the equipment and to analyze the data.
Instruments made by Aerosol have been already installed at the South Pole, Kashmir, Greenland, the Amazonian rainforest, and almost everywhere else. Our equipment is designed to perform exceptionally well even in the most demanding environments.
The “Tibetan Plateau Balloon Project” will generate ground breaking scientific data to support fundamental research into global pollution and climate change; and will help to support public policy decisions to improve air quality and water security for one-quarter of the global population. It will also foster further collaboration in areas of research, technology, education and science between Aerosol d.o.o. and the Chinese Academy of Science; and between Slovenia and China.
In 2015 Aethalometers AE33 were installed for Wadia institute of Himalayan Glaciarology in Dehradoon, India. Two sites – Bhojwasa (3,800 mts MSL) and Chirbasa (3600 mts MSL) near Gangotri are run by Dr. P.S. Negi. Dokriani site (3900 mts MSL) in Bhagirathi basin is run by Dr. D.P. Dobhal. The sites are measuring Black Carbon aerosols using Aethalometers AE33. Main sources on these sites are bio mass burning and transported aerosols. Gangotri town has the a lot of diesel generators, which could also be a potential source in Bhojwasa and Chirbasa sites. The aim of these studies is long term measuring of Black Carbon in Himalayan region, to study the Glacier melting and climate change. Sites have access two times in a year. There is no internet available at site: data is saved on Aethalometer AE 33, collected when visiting the sites and brought back to WIHG Dehradoon for analysis. The autonomy of the site was a big challenge. The whole set up, including Aethalometer AE33 and Co2 sensor, is kept inside a special IP65 boxes which were insulated by M&G using PE foam sheets from inside to keep the electronics warm. This whole set was put inside a hut to protect from rain and snow.
Are you an Aethalometer legacy model user? This is the message for you!
Aerosol d.o.o. is offering a trade-in discount of 10 % of global list price towards the purchase of a new instrument – Aethalometer® AE33, when an older model (Aethalometer AE22, AE31 or AE42) is traded in.
For more information feel free to contact us, using promotion code AE33VSLEGACY18.