Observations of Stratospheric NO, NO2, and O3 at Mauna Loa Observatory
"Explore four years of CU MAX-DOAS observations of stratospheric NO, NO2, and O3 at Mauna Loa Observatory in Hawaii, as well as long-term observables of UV-Visible gases. Learn about the methods used and time series of vertical columns. Presented by researchers from the University of Colorado Boulder."
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Presentation Transcript
1 Four years of CU MAX Four years of CU MAX- -DOAS observations of stratospheric NO DOAS observations of stratospheric NO2 2 and O at Mauna Loa Observatory, Hawai i at Mauna Loa Observatory, Hawai i and O3 3 Solar deck at Mauna Loa Observatory Christopher F. Lee1,2, Theodore K. Koenig1,2, and Rainer Volkamer1,2 1Department of Chemistry, University of Colorado Boulder 2Cooperative Institute for Research in Environmental Sciences (CIRES)
2 Multi Multi- -AXis AXis Differential Optical Absorption Spectroscopy (MAX Differential Optical Absorption Spectroscopy (MAX- -DOAS) DOAS) STRATOSPHERE STRATOSPHERE Z Zenith enith SUN SUN Solar Solar zenith zenith angle angle Telescope Telescope Elevation angle Elevation angle FREE TROPOSPHERE FREE TROPOSPHERE Limb Limb Mountain Mountain BOUNDARY LAYER BOUNDARY LAYER SURFACE SURFACE
3 Long Long- -term CU MAX term CU MAX- -DOAS observables DOAS observables Ultraviolet Ultraviolet Visible Visible O3 NO2 NO2 HCHO CHOCHO O3 IO BrO
4 Methods Methods NO2 (425 - 490 nm) NO2 (220 K; Vandaele et al. 1996) O3 (223 K; Bogumil et al. 2003) H2O (296 K; HITEMP 2010) O2-O2 (296 K; Hermans et al. 1999) Ring (250 K; SAO 2010) O3 (450 - 550 nm) NO2 (220 K; Vandaele et al. 1996) O3 (223 K; Bogumil et al. 2003) H2O (296 K; HITEMP 2010) O2-O2 (296 K; Hermans et al. 1999) Ring (250 K; SAO 2010) 5th order polynomial 5th order polynomial 1st order offset 1st order offset Air mass factors from look-up tables provided by the Network for the Detection of Atmospheric Composition Change (NDACC). Reference slant column density (SCDref) derived from annual Langley plots.
5 Time series of stratospheric NO Time series of stratospheric NO2 2 and O and O3 3 vertical columns vertical columns
