scholarly journals Peer Review #3 of "Impact of Front Range sources on reactive nitrogen concentrations and deposition in Rocky Mountain National Park (v0.1)"

2018 ◽  
Keyword(s):  
Peer Review ◽  
National Park ◽  
Rocky Mountain ◽  
Rocky Mountain National Park ◽  
Reactive Nitrogen ◽  
Front Range ◽  
Nitrogen Concentrations

scholarly journals Investigating types and sources of organic aerosol in Rocky Mountain National Park using aerosol mass spectrometry

2014 ◽  
Vol 14 (13) ◽  
pp. 19875-19915
Author(s):  
M. I. Schurman ◽  
T. Lee ◽  
Y. Sun ◽  
B. A. Schichtel ◽  
S. M. Kreidenweis ◽  
...  
Keyword(s):  
National Park ◽  
Rocky Mountain ◽  
Size Composition ◽  
Organic Aerosol ◽  
Rocky Mountain National Park ◽  
Surface Winds ◽  
Front Range ◽  
High Concentration ◽  
Mass Spectral ◽  
Aerosol Mass

Abstract. The environmental impacts of atmospheric particles are highlighted in remote areas where visibility and ecosystem health can be degraded by even relatively low particle concentrations. Submicron particle size, composition, and source apportionment were explored at Rocky Mountain National Park using a High-Resolution Time-of-Flight Aerosol Mass Spectrometer. This summer campaign found low average, but variable, particulate mass (PM) concentrations (max = 93.1 μg m−3, avg. = 5.13 ± 2.72 μg m−3) of which 75.2 ± 11.1% is organic. Low-volatility oxidized organic aerosol (LV-OOA, 39.3% of PM1 on average) identified using Positive Matrix Factorization appears to be mixed with ammonium sulfate (3.9 and 16.6% of mass, respectively), while semi-volatile OOA (27.6%) is correlated with ammonium nitrate (nitrate: 4.3%); concentrations of these mixtures are enhanced with upslope (SE) surface winds from the densely populated Front Range area, indicating the importance of transport. A local biomass burning organic aerosol (BBOA, 8.4%) source is suggested by mass spectral cellulose combustion markers (m/zs 60 and 73) limited to brief, high-concentration, polydisperse events (suggesting fresh combustion), a diurnal maximum at 22:00 local standard time (LST) when campfires were set at adjacent summer camps, and association with surface winds consistent with local campfire locations. The particle characteristics determined here represent typical summertime conditions at the Rocky Mountain site based on comparison to ∼10 years of meteorological, particle composition, and fire data.

Back-trajectory-based source apportionment of airborne sulfur and nitrogen concentrations at Rocky Mountain National Park, Colorado, USA

2011 ◽  
Vol 45 (3) ◽  
pp. 621-633 ◽  
Author(s):  
Kristi A. Gebhart ◽  
Bret A. Schichtel ◽  
William C. Malm ◽  
Michael G. Barna ◽  
Marco A. Rodriguez ◽  
...  
Keyword(s):  
Source Apportionment ◽  
National Park ◽  
Rocky Mountain ◽  
Rocky Mountain National Park ◽  
Back Trajectory ◽  
Nitrogen Concentrations

A hybrid modeling approach for estimating reactive nitrogen deposition in Rocky Mountain National Park

2016 ◽  
Vol 126 ◽  
pp. 258-273 ◽  
Author(s):  
William C. Malm ◽  
Marco A. Rodriguez ◽  
Bret A. Schichtel ◽  
Kristi A. Gebhart ◽  
Tammy M. Thompson ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
National Park ◽  
Rocky Mountain ◽  
Hybrid Modeling ◽  
Rocky Mountain National Park ◽  
Reactive Nitrogen ◽  
Modeling Approach

scholarly journals Investigating types and sources of organic aerosol in Rocky Mountain National Park using aerosol mass spectrometry

2015 ◽  
Vol 15 (2) ◽  
pp. 737-752 ◽  
Author(s):  
M. I. Schurman ◽  
T. Lee ◽  
Y. Sun ◽  
B. A. Schichtel ◽  
S. M. Kreidenweis ◽  
...  
Keyword(s):  
National Park ◽  
Rocky Mountain ◽  
Size Composition ◽  
Organic Aerosol ◽  
Rocky Mountain National Park ◽  
Surface Winds ◽  
Front Range ◽  
High Concentration ◽  
Mass Spectral ◽  
Aerosol Mass

Abstract. The environmental impacts of atmospheric particles are highlighted in remote areas where visibility and ecosystem health can be degraded by even relatively low particle concentrations. Submicron particle size, composition, and source apportionment were explored at Rocky Mountain National Park using a High-Resolution Time-of-Flight Aerosol Mass Spectrometer. This summer campaign found low average, but variable, particulate mass (PM) concentrations (max = 93.1 μg m−3, avg. = 5.13 ± 2.72 μg m−3) of which 75.2 ± 11.1% is organic. Low-volatility oxidized organic aerosol (LV-OOA, 39.3% of PM1 on average) identified using Positive Matrix Factorization appears to be mixed with ammonium sulfate (3.9% and 16.6% of mass, respectively), while semi-volatile OOA (27.6%) is correlated with ammonium nitrate (nitrate: 4.3%); concentrations of these mixtures are enhanced with upslope (SE) surface winds from the densely populated Front Range area, indicating the importance of transport. A local biomass burning organic aerosol (BBOA, 8.4%) source is suggested by mass spectral cellulose combustion markers (m/z 60 and 73) limited to brief, high-concentration, polydisperse events (suggesting fresh combustion), a diurnal maximum at 22:00 local standard time when campfires were set at adjacent summer camps, and association with surface winds consistent with local campfire locations. The particle characteristics determined here represent typical summertime conditions at the Rocky Mountain site based on comparison to ~10 years of meteorological, particle composition, and fire data.

Observations of atmospheric reactive nitrogen species in Rocky Mountain National Park and across northern Colorado

2013 ◽  
Vol 64 ◽  
pp. 66-76 ◽  
Author(s):  
Katherine B. Benedict ◽  
Derek Day ◽  
Florian M. Schwandner ◽  
Sonia M. Kreidenweis ◽  
Bret Schichtel ◽  
...  
Keyword(s):  
Reactive Nitrogen Species ◽  
National Park ◽  
Rocky Mountain ◽  
Rocky Mountain National Park ◽  
Reactive Nitrogen ◽  
Nitrogen Species ◽  
Northern Colorado
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