« Previous AbstractDigest: Extensive pollinator sharing does not promote character displacement in two orchid congeners    Next AbstractIn vivo imaging of Dauer-specific neuronal remodeling in C. elegans »

J Geophys Res Atmos

Title:		Formaldehyde column density measurements as a suitable pathway to estimate near-surface ozone tendencies from space
Author(s):		Schroeder JR; Crawford JH; Fried A; Walega J; Weinheimer A; Wisthaler A; Muller M; Mikoviny T; Chen G; Shook M; Blake DR; Diskin G; Estes M; Thompson AM; Lefer BL; Long R; Mattson E;
Address:		"NASA Langley Research Center, Hampton, Virginia, USA. NASA Postdoctoral Program, NASA Langley Research Center, Hampton, Virginia, USA. Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, Colorado, USA. National Center for Atmospheric Research, Boulder, Colorado, USA. Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Austria. Department of Chemistry, University of Oslo, Oslo, Norway. Department of Chemistry, University of California, Irvine, California, USA. Texas Commission on Environmental Quality, Austin, Texas, USA. Department of Meteorology, Penn State University, University Park, Pennsylvania, USA. NASA Goddard Space Flight Center, Greenbelt, Maryland, USA. Department of Earth and Atmospheric Science, University of Houston, Houston, Texas, USA. Now at NASA Headquarters, Washington, DC, USA. National Exposure Research Laboratory, U.S. EPA, Research Triangle Park, North Carolina, USA. Colorado Department of Public Health and Environment, Denver, Colorado, USA"
Journal Title:		J Geophys Res Atmos
Year:		2016
Volume:		20161015
Issue:		21
Page Number:		13088 - 13112
DOI:		10.1002/2016JD025419
ISSN/ISBN:		2169-897X (Print) 2169-8996 (Electronic) 2169-897X (Linking)
Abstract:		"In support of future satellite missions that aim to address the current shortcomings in measuring air quality from space, NASA's Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) field campaign was designed to enable exploration of relationships between column measurements of trace species relevant to air quality at high spatial and temporal resolution. In the DISCOVER-AQ data set, a modest correlation (r (2) = 0.45) between ozone (O(3)) and formaldehyde (CH(2)O) column densities was observed. Further analysis revealed regional variability in the O(3)-CH(2)O relationship, with Maryland having a strong relationship when data were viewed temporally and Houston having a strong relationship when data were viewed spatially. These differences in regional behavior are attributed to differences in volatile organic compound (VOC) emissions. In Maryland, biogenic VOCs were responsible for ~28% of CH(2)O formation within the boundary layer column, causing CH(2)O to, in general, increase monotonically throughout the day. In Houston, persistent anthropogenic emissions dominated the local hydrocarbon environment, and no discernable diurnal trend in CH(2)O was observed. Box model simulations suggested that ambient CH(2)O mixing ratios have a weak diurnal trend (+/-20% throughout the day) due to photochemical effects, and that larger diurnal trends are associated with changes in hydrocarbon precursors. Finally, mathematical relationships were developed from first principles and were able to replicate the different behaviors seen in Maryland and Houston. While studies would be necessary to validate these results and determine the regional applicability of the O(3)-CH(2)O relationship, the results presented here provide compelling insight into the ability of future satellite missions to aid in monitoring near-surface air quality"
Keywords:
Notes:		"PubMed-not-MEDLINESchroeder, Jason R Crawford, James H Fried, Alan Walega, James Weinheimer, Andrew Wisthaler, Armin Muller, Markus Mikoviny, Tomas Chen, Gao Shook, Michael Blake, Donald R Diskin, Glenn Estes, Mark Thompson, Anne M Lefer, Barry L Long, Russell Mattson, Eric eng SCMD-EarthScienceSystem/Science Earth Science System NASA/ 2016/11/16 J Geophys Res Atmos. 2016 Nov 16; 121(21):13088-13112. doi: 10.1002/2016JD025419. Epub 2016 Oct 15"