Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 5.414
IF5.414
IF 5-year value: 5.958
IF 5-year
5.958
CiteScore value: 9.7
CiteScore
9.7
SNIP value: 1.517
SNIP1.517
IPP value: 5.61
IPP5.61
SJR value: 2.601
SJR2.601
Scimago H <br class='widget-line-break'>index value: 191
Scimago H
index
191
h5-index value: 89
h5-index89
Preprints
https://doi.org/10.5194/acp-2020-188
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-188
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  09 Mar 2020

09 Mar 2020

Review status
A revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

Constraining Ammonia Emissions in Vehicle Plumes Utilizing Nitrogen Stable Isotopes

Wendell W. Walters1,2, Linlin Song3,4,5, Jiajue Chai1,2, Yunting Fang3,4,5, Nadia Colombi1, and Meredith G. Hastings1,2 Wendell W. Walters et al.
  • 1Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA
  • 2Institute at Brown for Environment and Society, Brown University, Providence, RI 02912, USA
  • 3CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning, 110016, China
  • 4Key Laboratoryof Stable Isotope Techniques and Applications, Shenyang,Liaoning, 110016,China
  • 5College of Sources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract. Vehicle emissions have been identified as an important urban source of ammonia (NH3). However, there are large uncertainties regarding the contribution of vehicle emissions to urban NH3 budgets, as well as its role in spatiotemporal fine particulate matter (PM2.5) formation and nitrogen (N) deposition patterns. The N stable isotopic composition (δ15N) may be a useful observational constraint to track NH3 emission sources and chemical processing, but previously reported vehicle δ15N(NH3) emission signatures have reported a wide range of values, indicating the need for further refinement. Here we have characterized δ15N(NH3) spatiotemporal variabilities from vehicle plumes in stationary and on-road measurements in the US and China using a laboratory- and field-verified NH3 collection technique shown to be accurate for characterizing δ15N(NH3) on the order of hourly time resolution. Significant spatial and temporal δ15N(NH3) variabilities were observed and suggested to be driven by vehicle fleet composition and influences from NH3 dry deposition on tunnel surfaces. The reactive NH3 sink associated with particulate ammonium (pNH4+) formation was found to have a minimal impact on the vehicle plume δ15N(NH3) measurements due to the vast majority of NHx (= NH3 + pNH4+) residing as NH3. Overall, a consistent δ15N(NH3) signature of 6.6 ± 2.1 ‰ (x ± 1σ; n = 80) was found in vehicle plumes with fleet compositions typical of urban regions. Overall, these measurements constrain the δ15N(NH3) urban traffic plume signature, which has important implications for tracking vehicle NH3 in urban-affected areas.

Wendell W. Walters et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Wendell W. Walters et al.

Data sets

Data for "Constraining Ammonia Emissions in Traffic-Derived Plumes Utilizing Nitrogen Stable Isotopes" We. W. Walters, L. Song, J. Chai, Y. Fang, N. Colombi, and M. G. Hastings https://doi.org/10.26300/q3h4-7s93

Wendell W. Walters et al.

Viewed

Total article views: 375 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
256 104 15 375 37 14 18
  • HTML: 256
  • PDF: 104
  • XML: 15
  • Total: 375
  • Supplement: 37
  • BibTeX: 14
  • EndNote: 18
Views and downloads (calculated since 09 Mar 2020)
Cumulative views and downloads (calculated since 09 Mar 2020)

Viewed (geographical distribution)

Total article views: 241 (including HTML, PDF, and XML) Thereof 236 with geography defined and 5 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 24 Sep 2020
Publications Copernicus
Download
Citation
Altmetrics