HR: 1340h
AN: A33C-1416    [Abstracts]
TI: Robust Remote Sensing of Smog Ozone and Its Production
AU: * Chatfield, R B
EM: Robert.B.Chatfield@nasa.gov
AF: NASA Ames Research Center, MS 245-5, Moffett Field, CA 94035, United States
AU: Kumer, J B
EM: jack.kumer@lmco.com
AF: Lockheed Martin Advanced Technology Ctr, ADCS 255 2 3251 Hanover Street, Palo Alto, CA 94304, United States
AU: Roche, A
EM: aidan.roche@lmco.com
AF: Lockheed Martin Advanced Technology Ctr, ADCS 255 2 3251 Hanover Street, Palo Alto, CA 94304, United States
AU: Mergenthaler, J L
EM: john.l.mergenthaler@lmco.com
AF: Lockheed Martin Advanced Technology Ctr, ADCS 255 2 3251 Hanover Street, Palo Alto, CA 94304, United States
AB: Boundary layer smog ozone and an important tracer of its production, formaldehyde, are indeed fully visible from space at ca. 3.57 microns using an conceptually simple, robust, inexpensive optical train. This is Tropospheric Infrared Mapping Spectrometry, TIMS. Lockheed Martin has demonstrated echelle technology and a low-noise IR detector in application to carbon monoxide, methane, and water using a grating mapping spectrometer in the lab and in the field. A key idea is focus on narrow, very informative spectral regions and a scanning technology; in low Earth orbit, the only moving part is calibration, or in GEO, a standard scanner. A change of echelle-grating order allows a focus on the 3.57 micron region, allowing determination of total ozone column, formaldehyde column with lower-troposphere vertical information, methane, and nitrous oxide (a useful atmospheric-column measurement). A variant of the design operating near 400 nm would provide extremely compact NO₂ measurements, thus allowing compact (8 cm diameter) UV devices to be added as useful companions. Robust, inexpensive, rapidly deployable ozone monitoring is thus proposed going far beyond the expectations of the recent Earth Science Decadal Survey of remote sensing possibilities and needs. Our current research emphasizes the published utility of NO₂ and HCHO sensing in defining ozone production and its complex emissions sensitivities. The form of the technology implies that variety of options exist, from a rapid-launch, inexpensive 3.57 micron O₃-HCHO device to a very compact full-suite complement including more CO, CH₄ and NO₂ information suitable for geostationary orbit. We also mention that careful statistics using full-column measurements and atmospheric thermal structure information from sounders like AIRS or IASI allow a focus on lower tropospheric ozone with little need for a separate stratospheric-ozone device (SBUV, MLS, HIRDLS). Tropospheric chemistry missions can considerably cut in cost and development time; this is important given the EPA's recent emphasis on the human and economic toll of smog ozone, one justifying stricter standards and a broader regional and international focus.
UR: http://geo.arc.nasa.gov/sgg/chatfield/index.html
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0360 Radiation: transmission and scattering
DE: 0365 Troposphere: composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting