Journal article

Hydroxyl radicals in the tropical troposphere over the Suriname rainforest: Comparison of measurements with the box model MECCA

Kubistin D, Harder H, Martinez M, Rudolf M, Sander R, Bozem H, Eerdekens G, Fischer H, Gurk C, Klüpfel T, Königstedt R, Parchatka U, Schiller C, Stickler A, Taraborrelli D, Williams J, Lelieveld J ...see all

Atmospheric Chemistry and Physics, vol. 10, issue 19 (2010) pp. 9705-9728

  • 49

    Readers

    Mendeley users who have this article in their library.
  • 48

    Citations

    Citations of this article.
Sign in to save reference

Abstract

Direct measurements of OH and HO(2) over a tropical rainforest were made for the first time during the GABRIEL campaign in October 2005, deploying the custom-built HORUS instrument (HydrOxyl Radical measurement Unit based on fluorescence Spectroscopy), adapted to fly in a Learjet wingpod. Biogenic hydrocarbon emissions were expected to strongly reduce the OH and HO(2) mixing ratios as the air is transported from the ocean over the forest. However, surprisingly high mixing ratios of both OH and HO(2) were encountered in the boundary layer over the rainforest. The HORUS instrumentation and calibration methods are described in detail and the measurement results obtained are discussed. The extensive dataset collected during GABRIEL, including measurements of many other trace gases and photolysis frequencies, has been used to quantify the main sources and sinks of OH. Comparison of these measurement-derived formation and loss rates of OH indicates strong previously overlooked recycling of OH in the boundary layer over the tropical rainforest, occurring in chorus with isoprene emission.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free