Formaldehyde and hydroperoxides at Mauna Loa Observatory

B. G. Heikes

Document Type

Article

Date of Original Version

1-1-1992

Abstract

Average concentrations of H2O2, ROOH, and CH2O were 1050, 140, and 100 pptv in free tropospheric, or down-slope air. In upslope air, or modified marine boundary layer air, average concentrations were 900, 150, and 190 pptv. Maximum concentrations for all three species were experienced during a two day "photochemical haze' episode and were 3230, 440, and 450 pptv for H2O2, ROOH, and CH2O. H2O2 was depleted in air which had recently been processed by cloud or precipitation. The measured concentrations of these three species were comparable to prior measurements in "well-aged' air, but were lower than previous models have predicted. The measured ratio of ROOH to H2O2 is significantly different than present theory predicts, with ROOH as measured being approximately a factor of 5 too low. -from Author

Publication Title, e.g., Journal

Journal of Geophysical Research

Volume

97

Issue

D16

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