Found 9764 publications. Showing page 345 of 391:
2017
Assessment of transboundary pollution with heavy metals and POPs
Meteorological Synthesizing Centre – East (MSC-E)
2024
Assessment of transboundary pollution by toxic substances: Heavy metals and POPs
Meteorological Synthesizing Centre - East (MSC-E)
2020
Assessment of transboundary pollution by toxic substances: Heavy metals and POPs
Meteorological Synthesizing Centre ‐ East
2019
Assessment of traffic noise and mitigation options for Al Salam Street. NILU OR
Acting on request from the Abu Dhabi Municipality, Norwegian Institute for Air Research has been asked by the Abu Dhabi Municipality to evaluate the current noise levels on Salam Street and recommend mitigation measures to control the noise.
NILU provided traffic count data collected near the Sheikh Zayed Bridge and these were used in conjunction with an acoustic model to predict the existing noise conditions at 126 sensitive receptor locations.The predicted sound levels were compared to measured sound levels collected at seven (7) locations along Al Salam Street to validate the results of the modelling. This comparison showed strong correlation between the modelled and measured results.
Several mitigation options provided by NILU were incorporated into subsequent runs of the baseline model in order to predict the effectiveness of each option. It was found that the installation of a 5 m barrier adjacent to the outbound lanes of Al Salam Street would be the most effective individual mitigation option.
2012
2004
Assessment of spatial and temporal trends of POP pollution on regional and global scale. EMEP Status Report, 3/2015
2015
Assessment of source contributions to the urban air quality for the Bristol ClairCity pilot case
WIT Press
2019
2012
2014
2014
2010
2004
2010
The increased availability of commercially-available low-cost air quality sensors combined with increased interest in their use by citizen scientists, community groups, and professionals is resulting in rapid adoption, despite data quality concerns. We have characterized three out-the-box PM sensor systems under different environmental conditions, using field colocation against reference equipment. The sensor systems integrate Plantower 5003, Sensirion SPS30 and Alphasense OCP-N3 PM sensors. The first two use photometry as a measuring technique, while the third one is an optical particle counter. For the performance evaluation, we co-located 3 units of each manufacturer and compared the results against optical (FIDAS) and gravimetric (KFG) methods for a period of 7 weeks (28 August to 19 October 2020). During the period from 2nd and 5th October, unusually high PM concentrations were observed due to a long-range transport episode. The results show that the highest correlations between the sensor systems and the optical reference are observed for PM1, with coefficients of determination above 0.9, followed by PM2.5. All the sensor units struggle to correctly measure PM10, and the coefficients of determination vary between 0.45 and 0.64. This behavior is also corroborated when using the gravimetric method, where correlations are significantly higher for PM2.5 than for PM10, especially for the sensor systems based on photometry. During the long range transport event the performance of the photometric sensors was heavily affected, and PM10 was largely underestimated. The sensor systems evaluated in this study had good agreement with the reference instrumentation for PM1 and PM2.5; however, they struggled to correctly measure PM10. The sensors also showed a decrease in accuracy when the ambient size distribution was different from the one for which the manufacturer had calibrated the sensor, and during weather conditions with high relative humidity. When interpreting and communicating air quality data measured using low-cost sensor systems, it is important to consider such limitations in order not to risk misinterpretation of the resulting data.
MDPI
2021
2014
2016
2017
Assessment of heavy metal transboundary pollution, progress in model development and mercury research. EMEP Status Report, 2/2016
2016
Assessment of heavy metal transboundary pollution on regional and national scales, transition to the new EMEP grid. EMEP Status Report, 2/2017
2017
Assessment of heavy metal transboundary pollution on global, regional and national scales
Meteorological Synthesizing Centre - East (MSC-E)
2018
2009