Diesel soot aging in urban plumes within hours under cold dark and humid conditions
(2017) In Scientific Reports- Abstract
- Fresh and aged diesel soot particles have different impacts on climate and human health. While fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical and hygroscopic. Aging and its effect on water uptake also controls the dispersion of diesel soot in the atmosphere. Understanding the timescales on which diesel soot ages in the atmosphere is thus important, yet knowledge thereof is lacking. We show that under cold, dark and humid conditions the atmospheric transformation from fresh to aged soot occurs on a timescale of less than five hours. Under dry conditions in the laboratory, diesel soot transformation is much less efficient. While photochemistry drives soot aging, our data show it is not... (More)
- Fresh and aged diesel soot particles have different impacts on climate and human health. While fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical and hygroscopic. Aging and its effect on water uptake also controls the dispersion of diesel soot in the atmosphere. Understanding the timescales on which diesel soot ages in the atmosphere is thus important, yet knowledge thereof is lacking. We show that under cold, dark and humid conditions the atmospheric transformation from fresh to aged soot occurs on a timescale of less than five hours. Under dry conditions in the laboratory, diesel soot transformation is much less efficient. While photochemistry drives soot aging, our data show it is not always a limiting factor. Field observations together with aerosol process model simulations show that the rapid ambient diesel soot aging in urban plumes is caused by coupled ammonium nitrate formation and water uptake. (Less)
- Abstract (Swedish)
- Fresh and aged diesel soot particles have different impacts on climate and human health. While
fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical
and hygroscopic. Aging and its effect on water uptake also controls the dispersion of diesel soot in
the atmosphere. Understanding the timescales on which diesel soot ages in the atmosphere is thus important, yet knowledge thereof is lacking. We show that under cold, dark and humid conditions the atmospheric transformation from fresh to aged soot occurs on a timescale of less than five hours. Under dry conditions in the laboratory, diesel soot transformation is much less efficient. While photochemistry drives soot aging, our data show... (More) - Fresh and aged diesel soot particles have different impacts on climate and human health. While
fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical
and hygroscopic. Aging and its effect on water uptake also controls the dispersion of diesel soot in
the atmosphere. Understanding the timescales on which diesel soot ages in the atmosphere is thus important, yet knowledge thereof is lacking. We show that under cold, dark and humid conditions the atmospheric transformation from fresh to aged soot occurs on a timescale of less than five hours. Under dry conditions in the laboratory, diesel soot transformation is much less efficient. While photochemistry drives soot aging, our data show it is not always a limiting factor. Field observations together with aerosol process model simulations show that the rapid ambient diesel soot aging in urban plumes is caused by coupled ammonium nitrate formation and water uptake (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/fa9483d2-ab6a-4e02-9f2f-c9cdbe824e12
- author
- organization
- publishing date
- 2017-09-28
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- article number
- 12364
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85030118935
- pmid:28959023
- wos:000411998800003
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-017-12433-0
- language
- English
- LU publication?
- yes
- id
- fa9483d2-ab6a-4e02-9f2f-c9cdbe824e12
- date added to LUP
- 2017-10-09 13:47:45
- date last changed
- 2022-03-17 01:32:02
@article{fa9483d2-ab6a-4e02-9f2f-c9cdbe824e12, abstract = {{Fresh and aged diesel soot particles have different impacts on climate and human health. While fresh diesel soot particles are highly aspherical and non-hygroscopic, aged particles are spherical and hygroscopic. Aging and its effect on water uptake also controls the dispersion of diesel soot in the atmosphere. Understanding the timescales on which diesel soot ages in the atmosphere is thus important, yet knowledge thereof is lacking. We show that under cold, dark and humid conditions the atmospheric transformation from fresh to aged soot occurs on a timescale of less than five hours. Under dry conditions in the laboratory, diesel soot transformation is much less efficient. While photochemistry drives soot aging, our data show it is not always a limiting factor. Field observations together with aerosol process model simulations show that the rapid ambient diesel soot aging in urban plumes is caused by coupled ammonium nitrate formation and water uptake.}}, author = {{Eriksson, Axel and Wittbom, Cerina and Roldin, Pontus and Sporre, Moa and Öström, Emilie and Nilsson, Patrik and Martinsson, Johan and Rissler, Jenny and NORDIN, ERIK and Svenningsson, Birgitta and Pagels, Joakim and Swietlicki, Erik}}, issn = {{2045-2322}}, language = {{eng}}, month = {{09}}, publisher = {{Nature Publishing Group}}, series = {{Scientific Reports}}, title = {{Diesel soot aging in urban plumes within hours under cold dark and humid conditions}}, url = {{http://dx.doi.org/10.1038/s41598-017-12433-0}}, doi = {{10.1038/s41598-017-12433-0}}, year = {{2017}}, }