首页|Use of Satellite Cloud Observations for Improved Biogenic Emissions

Use of Satellite Cloud Observations for Improved Biogenic Emissions

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One of the challenges in understanding the air quality over forested regions has been the uncertainties in estimating the biogenic hydrocarbon emissions。 Biogenic volatile organic compounds， BVOCs， play a critical role in atmospheric chemistry， particularly in ozone and particulate matter (PM) formation。 In the Southeastern United States， BVOCs (mostly as isoprene) are the dominant summertime source of reactive hydrocarbon。 Despite significant efforts in improving BVOC estimates， the errors in emission inventories remain a concern。 This is partly due to the diversity of the land use/land cover (LU/LC) and complex weather patterns， and partly due to model errors in simulating clouds。 VOC emissions are highly sensitive to light， and errors in the model simulated clouds impact the amount of Photosynthetically Active Radiation (PAR) reaching the canopy and thereby significantly impact the emission estimates。 Furthermore， relating atmospheric observations of isoprene to the emissions source (vegetation) relies on many meteorological factors that control the emission， chemistry， and atmospheric transport。 In this study， we utilize satellite observations of clouds and insolation to estimate a satellite-derived PAR for biogenic emission estimates。 The improved biogenic emission estimates are compared to the emission inventories over Texas and used in air quality simulation over the period of August-September 2013 (NASA's Discover-AQ field campaign)。 A series of sensitivity simulations are performed and evaluated against Discover-AQ observations to test the impact of satellite-derived PAR on air quality simulations。

Satellite assimilationbiogenic emissionsphotosynthetically active radiation (PAR)insolationcloud correctionWRFCMAQ

Arastoo Pour-Biazar、Richard T. McNider、Andrew White、Dan Cohan、Rui Zhang、Mark Estes、Bright Dornblaser

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Earth System Science Center, University of Alabama in Huntsville, Huntsville, AL 35899

Dept. of Civil & Environmental Engineering, Rice University MS 519, Houston, Texas 77005

Texas Commission on Environmental Quality, P.O. Box 13087, Austin, TX 78711-3087

Air and Waste Management Association annual conference and exhibition

Raleigh, NC(US)

108th Air and Waste Management Association annual conference and exhibition: connecting the dots: environmental quality to climate

2612-2626

2015