Researchers from the Johns Hopkins Bloomberg School of Public Health analyzed how airborne particulate matter from forest fires in the Canadian providence of Quebec traveled more than 700 miles to homes in Baltimore, Md. The study authors found a dramatic increase in outdoor and indoor fine particulate matter – an atmospheric pollutant that is harmful to people with respiratory diseases– in Baltimore during the first weekend of July 2002, which coincided with several forest fires in Quebec. The same fine particulate matter that the authors found to be transported across large distances readily penetrated people’s homes where they spend most of their time. The researchers believe this should be a public health concern because fine particulate matter can penetrate deep into the lungs. The study is published in the current online issue of Environmental Science & Technology.
“This study provides a dramatic example of the significance that global air pollution has, not only on the outdoor air quality in our communities, but on air quality indoors where even the most susceptible among us look for protection,” said Timothy J. Buckley, PhD, MHS, associate professor in the Bloomberg School of Public Health’s Department of Environmental Health Sciences and the study’s senior author.
The researchers used satellite images, trajectory models, light detection and ranging measurements to track emissions from the Canadian forest fires to levels of particulate matter in Baltimore. During the peak of the episodes, ambient PM 2.5 levels increased eight-fold from 25 ug/m3 to 199 ug/m3 on July 7, 2002. The Environmental Protection Agency’s National Ambient Air Quality Standard was exceeded on this particular day. Indoor levels closely tracked the outdoor concentrations, indicating that being indoors at home offered little protection from the pollution episode. At the peak of the episode, PM2.5 levels as high as 366 ug/m3 were recorded inside.
Kenna L. Lowe | EurekAlert!
New study first to predict which oil and gas wells are leaking methane
21.12.2018 | University of Vermont
Droughts boost emissions as hydropower dries up
21.12.2018 | Stanford's School of Earth, Energy & Environmental Sciences
The scientific and political community alike stress the importance of German Antarctic research
Joint Press Release from the BMBF and AWI
The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...
World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles
The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.
Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.
In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...
Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.
It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:
The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.
One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...
16.01.2019 | Event News
14.01.2019 | Event News
12.12.2018 | Event News
18.01.2019 | Materials Sciences
18.01.2019 | Life Sciences
18.01.2019 | Health and Medicine