| Title: | Inferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements |
| Author(s): | Ringsdorf A; Edtbauer A; Vila-Guerau de Arellano J; Pfannerstill EY; Gromov S; Kumar V; Pozzer A; Wolff S; Tsokankunku A; Soergel M; Sa MO; Araujo A; Ditas F; Poehlker C; Lelieveld J; Williams J; |
| Address: | "Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany. A.Ringsdorf@mpic.de. Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany. Meteorology and Air Quality Section, Wageningen University, Wageningen, The Netherlands. Satellite Remote Sensing Group, Max Planck Institute for Chemistry, Mainz, Germany. Friedrich-Alexander-Universitat Erlangen-Nurnberg, Sachgebiet Arbeitssicherheit, Erlangen, Germany. Instituto Nacional de Pesquisas da Amazonia (INPA), Manaus, CEP 69067-375, Brazil. Empresa Brasileira de Pesquisa Agropecuaria (Embrapa) Amazonia Oriental, Belem, CEP 66095-100, Brazil. Department of Multiphase Chemistry, Max Planck Institute for Chemistry, Mainz, Germany. Hessian Agency for Nature Conservation, Environment and Geology, Wiesbaden, Germany. Climate and Atmosphere Research Center, The Cyprus Institute, 1645, Nicosia, Cyprus. Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany. Jonathan.Williams@mpic.de. Climate and Atmosphere Research Center, The Cyprus Institute, 1645, Nicosia, Cyprus. Jonathan.Williams@mpic.de" |
| DOI: | 10.1038/s41598-023-41748-4 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "The atmospheric oxidation of biogenic volatile organic compounds (BVOC) by OH radicals over tropical rainforests impacts local particle production and the lifetime of globally distributed chemically and radiatively active gases. For the pristine Amazon rainforest during the dry season, we empirically determined the diurnal OH radical variability at the forest-atmosphere interface region between 80 and 325 m from 07:00 to 15:00 LT using BVOC measurements. A dynamic time warping approach was applied showing that median averaged mixing times between 80 to 325 m decrease from 105 to 15 min over this time period. The inferred OH concentrations show evidence for an early morning OH peak (07:00-08:00 LT) and an OH maximum (14:00 LT) reaching 2.2 (0.2, 3.8) x 10(6 )molecules cm(-3) controlled by the coupling between BVOC emission fluxes, nocturnal NO(x) accumulation, convective turbulence, air chemistry and photolysis rates. The results were evaluated with a turbulence resolving transport (DALES), a regional scale (WRF-Chem) and a global (EMAC) atmospheric chemistry model" |
| Notes: | "PubMed-not-MEDLINERingsdorf, A Edtbauer, A Vila-Guerau de Arellano, J Pfannerstill, E Y Gromov, S Kumar, V Pozzer, A Wolff, S Tsokankunku, A Soergel, M Sa, M O Araujo, A Ditas, F Poehlker, C Lelieveld, J Williams, J eng England 2023/09/10 Sci Rep. 2023 Sep 9; 13(1):14900. doi: 10.1038/s41598-023-41748-4" |
