Publications by authors named "Hugo S Russell"
Low-cost Particulate Matter (PM) sensors offer an excellent opportunity to improve our knowledge about this type of pollution. Their size and cost, which support multi-node network deployment, along with their temporal resolution, enable them to report fine spatio-temporal resolution for a given area. These sensors have known issues across performance metrics.
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- The Copenhagen Metro has four lines with 25 underground and 14 above-ground stations, serving about 80 million passengers each year.
- A study measured fine particulate matter (PM) and carbon dioxide (CO) levels, revealing high PM concentrations, especially in underground stations, due to limited ventilation from tunnel openings.
- The analysis showed that PM consists largely of iron from train components, while CO levels indicate ventilation affected by tunnel air; despite being relatively new, the metro system shows significant pollution and requires measures to improve air quality.
Article Synopsis
- - Fine particulate matter (PM) levels in the Copenhagen metro are significantly higher, approximately 10 times greater than roadside levels, highlighting a concerning air quality issue.
- - Low-cost sensor (LCS) nodes were effectively tested against traditional devices, showing strong correlation in personal exposure measurements within the metro system, achieving over 80% accuracy in differentiating between micro-environments (MEs).
- - The study revealed that underground PM concentrations were 143% higher than overground, and also found that the MEs can refine exposure assessment models, allowing for better understanding of air quality variations without the need for manual data collection.
Accurate calibration of low-cost gas sensors is, at present, a time consuming and difficult process. Laboratory calibration and field calibration methods are currently used, but laboratory calibration is generally discounted due to poor transferability, and field methods requiring several weeks are standard. The Enhanced Ambient Sensing Environment (EASE) method described in this article, is a hybrid of the two, combining the advantages of a laboratory calibration with the increased accuracy of a field calibration.
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- - Airborne particulate matter (PM) poses significant health risks, causing nearly 9 million premature deaths annually, particularly affecting respiratory and cardiovascular health.
- - Low-cost optical sensors for PM measurement are being explored for personal exposure monitoring, although their accuracy can be influenced by environmental factors like humidity and temperature, as well as different pollution sources.
- - A study tested 40 individual low-cost optical PM sensors against high-grade instruments, revealing varied performance, especially in detecting pollution spikes; a combination of different models could enhance monitoring effectiveness and pollution source tracking.