scholarly journals Using stable isotopes of hydrogen to quantify biogenic and thermogenic atmospheric methane sources: A case study from the Colorado Front Range

2016 ◽  
Vol 43 (21) ◽  
pp. 11,462-11,471 ◽  
Author(s):  
Amy Townsend-Small ◽  
E. Claire Botner ◽  
Kristine L. Jimenez ◽  
Jason R. Schroeder ◽  
Nicola J. Blake ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Colorado Front Range ◽  
Front Range ◽  
Atmospheric Methane

Climate change and wildfire risk in an expanding wildland–urban interface: a case study from the Colorado Front Range Corridor

2015 ◽  
Vol 30 (10) ◽  
pp. 1943-1957 ◽  
Author(s):  
Zhihua Liu ◽  
Michael C. Wimberly ◽  
Aashis Lamsal ◽  
Terry L. Sohl ◽  
Todd J. Hawbaker
Keyword(s):  
Climate Change ◽  
Colorado Front Range ◽  
Front Range ◽  
Wildland Urban Interface ◽  
Wildfire Risk

Modeling wildfire potential in residential parcels: A case study of the north-central Colorado Front Range

2011 ◽  
Vol 102 (2) ◽  
pp. 117-126 ◽  
Author(s):  
Rutherford V. Platt ◽  
Tania Schoennagel ◽  
Thomas T. Veblen ◽  
Rosemary L. Sherriff
Keyword(s):  
Colorado Front Range ◽  
Front Range ◽  
North Central ◽  
The North

scholarly journals Using TES retrievals to investigate PAN in North American biomass burning plumes

2018 ◽  
Vol 18 (8) ◽  
pp. 5639-5653 ◽  
Author(s):  
Emily V. Fischer ◽  
Liye Zhu ◽  
Vivienne H. Payne ◽  
John R. Worden ◽  
Zhe Jiang ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Colorado Front Range ◽  
Ozone Production ◽  
Hazard Mapping ◽  
Front Range ◽  
Mapping System ◽  
Smoke Plumes ◽  
In Situ Observations

Abstract. Peroxyacyl nitrate (PAN) is a critical atmospheric reservoir for nitrogen oxide radicals, and plays a lead role in their redistribution in the troposphere. We analyze new Tropospheric Emission Spectrometer (TES) PAN observations over North America from July 2006 to July 2009. Using aircraft observations from the Colorado Front Range, we demonstrate that TES can be sensitive to elevated PAN in the boundary layer (∼ 750 hPa) even in the presence of clouds. In situ observations have shown that wildfire emissions can rapidly produce PAN, and PAN decomposition is an important component of ozone production in smoke plumes. We identify smoke-impacted TES PAN retrievals by co-location with NOAA Hazard Mapping System (HMS) smoke plumes. Depending on the year, 15–32 % of cases where elevated PAN is identified in TES observations (retrievals with degrees of freedom (DOF) > 0.6) overlap smoke plumes during July. Of all the retrievals attempted in the July 2006 to July 2009 study period, 18 % is associated with smoke . A case study of smoke transport in July 2007 illustrates that PAN enhancements associated with HMS smoke plumes can be connected to fire complexes, providing evidence that TES is sufficiently sensitive to measure elevated PAN several days downwind of major fires. Using a subset of retrievals with TES 510 hPa carbon monoxide (CO) > 150 ppbv, and multiple estimates of background PAN, we calculate enhancement ratios for tropospheric average PAN relative to CO in smoke-impacted retrievals. Most of the TES-based enhancement ratios fall within the range calculated from in situ measurements.

scholarly journals The Contribution of Fires to TES Observations of Free Tropospheric PAN over North America in July

2017 ◽  
Author(s):  
Emily V. Fischer ◽  
Liye Zhu ◽  
Vivienne H. Payne ◽  
John R. Worden ◽  
Zhe Jiang ◽  
...  
Keyword(s):  
North America ◽  
Colorado Front Range ◽  
Ozone Production ◽  
Hazard Mapping ◽  
Front Range ◽  
Mapping System ◽  
Smoke Plumes ◽  
In Situ Observations

Abstract. Peroxyacetyl nitrate (PAN) is a critical atmospheric reservoir for nitrogen oxide radicals, and it plays a lead role in their redistribution in the troposphere. We analyze new Tropospheric Emission Spectrometer (TES) PAN observations over North America during July 2006 to 2009. Using aircraft observations from the Colorado Front Range, we demonstrate that TES can be sensitive to elevated PAN in the boundary layer even in the presence of clouds. In situ observations have shown that wildfire emissions can rapidly produce PAN, and PAN decomposition is an important component of ozone production in smoke plumes. We identify smoke-impacted TES PAN retrievals by co-location with NOAA Hazard Mapping System (HMS) smoke plumes. We find that 15–32 % of cases where elevated PAN is identified in TES observations (retrievals with DOF > 0.6) overlap smoke plumes. A case study of smoke transport in July 2007 illustrates that PAN enhancements associated with HMS smoke plumes can be connected to fire complexes, providing evidence that TES is sufficiently sensitive to measure elevated PAN several days downwind of major fires. Using a subset of retrievals with TES 510 hPa carbon monoxide (CO) > 150 ppbv, and multiple estimates of background PAN, we calculate enhancement ratios for tropospheric average PAN relative to CO in smoke-impacted retrievals. Most of the TES-based enhancement ratios fall within the range calculated from in situ measurements.

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