Open AccessHydrogen peroxide in the marine atmospheric boundary layer during the Atlantic Stratocumulus Transition Experiment/Marine Aerosol and Gas Exchange experiment in the eastern subtropical North Atlantic
Author(s) -
Martin Daniel,
Tsivou Maria,
Bonsang Bernard,
Abonnel Christian,
Carsey Thomas,
SpringerYoung Margie,
Pszenny Alex,
Suhre Karsten
Publication year - 1997
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/96jd03056
Subject(s) - sunrise , aerosol , atmospheric sciences , sunset , mixing ratio , environmental science , planetary boundary layer , flux (metallurgy) , atmosphere (unit) , oceanography , climatology , meteorology , chemistry , geology , geography , physics , organic chemistry , astronomy , turbulence
Gas phase H 2 O 2 was measured in surface air on the NOAA ship Malcolm Baldrige from June 8 to 27, 1992 (Julian days 160–179), during the Atlantic Stratocumulus Transition Experiment/Marine Aerosol and Gas Exchange experiment in the eastern subtropical North Atlantic region. Average H 2 O 2 mixing ratios observed were 0.63±0.28 ppbv, ranging between detection limit and 1.5 ppbv. For the entire experiment, only weak or no correlation was found between H 2 O 2 mixing ratio and meteorological parameters (pressure, temperature, humidity, or UV radiation flux) as well as with tracers of continental air masses (CO, black carbon, radon). The average daily H 2 O 2 cycle for the entire period exhibits a maximum of 0.8±0.3 ppbv near sunset and a minimum of 0.4±0.2 ppbv 4–5 hours after sunrise. Several clear H 2 O 2 diurnal variations have been observed, from which a first‐order removal rate of about 1×10 −5 s −1 for H 2 O 2 can be inferred from nighttime measurements. This rate compares well with those deduced from measurements taken at Cape Grim (Tasmania, 41°S) and during the Soviet‐American Gas and Aerosol III experiment (equatorial Pacific Ocean).