Articles | Volume 16, issue 18
Atmos. Chem. Phys., 16, 12305–12328, 2016
https://doi.org/10.5194/acp-16-12305-2016
Atmos. Chem. Phys., 16, 12305–12328, 2016
https://doi.org/10.5194/acp-16-12305-2016

Research article 29 Sep 2016

Research article | 29 Sep 2016

Interannual variability of ammonia concentrations over the United States: sources and implications

Luke D. Schiferl et al.

Data sets

Global distributions, time series and error characterization of atmospheric ammonia (NH3) from IASI satellite observations M. Van Damme, L. Clarisse, C. L. Heald, D. Hurtmans, Y. Ngadi, C. Clerbaux, A. J. Dolman, J. W. Erisman, and P. F. Coheur https://doi.org/10.5194/acp-14-2905-2014

AMoN data, Bi-weekly samples, average of replicates NADP http://nadp.sws.uiuc.edu/dataLib/AMoN/csv/all-ave.csv

ICARTT NOAA WP-3D aircraft data, Chemical Sciences Division NOAA ESRL http://esrl.noaa.gov/csd/groups/csd7/measurements/2004NEAQSITCT/P3/DataDownload

TexAQS NOAA WP-3D aircraft data NOAA ESRL http://esrl.noaa.gov/csd/groups/csd7/measurements/2006TexAQS/P3/DataDownload

CalNex NOAA WP-3D aircraft data NOAA ESRL http://esrl.noaa.gov/csd/groups/csd7/measurements/2010calnex/P3/DataDownload

DISCOVER-AQ CA P-3B aircraft data NASA LaRC http://air.larc.nasa.gov/cgi-bin/ArcView/discover-aq.ca-2013

SENEX NOAA WP-3D aircraft data NOAA ESRL http://esrl.noaa.gov/csd/groups/csd7/measurements/2013senex/P3/DataDownload/

FRAPPE NCAR C130 aircraft data NASA LaRC http://air.larc.nasa.gov/cgi-bin/ArcView/discover-aq.co-2014?C130=1

NASS QuickStats USDA http://quickstats.nass.usda.gov

IMPROVE aerosol data Federal Land Manager Environmental Database (FED) http://views.cira.colostate.edu/fed/DataWizard/Default.aspx

Download
Short summary
This study combines new observations and a simulation to assess the interannual variability of atmospheric ammonia concentrations over the United States. The model generally underrepresents the observed variability. Nearly two-thirds of the simulated variability is caused by meteorology, twice that caused by regulations on fossil fuel combustion emissions. Adding ammonia emissions variability does not substantially improve the simulation and has little impact on summer particle concentrations.
Altmetrics
Final-revised paper
Preprint