@InProceedings{WolffGTPSMSTS:2016:CoMeRe,
author = "Wolff, Stefan Aiko and Ganzeveld, Laurens and Tsokankunku,
Anywhere and P{\"o}hlker, Christopher and S{\'a}, Leonardo Deane
de Abreu and Manzi, Antonio Ocimar and Souza, Rodrigo and Trebs,
Ivonne and Soergel, Matthias",
affiliation = "{Max Planck Institute for Chemistry–Mainz} and {Wageningen UR} and
{Max Planck Institute for Chemistry–Mainz} and {Max Planck
Institute for Chemistry–Mainz} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {} and {Max Planck Institute for
Chemistry–Mainz} and {Max Planck Institute for Chemistry–Mainz}",
title = "Comparison of measured reactive trace gas profiles with a
multi-layer canopy chemical exchange model in an Amazonian
rainforest",
booktitle = "Abstracts...",
year = "2016",
organization = "EGU General Assembly",
abstract = "In 2011, an 80 m high walk up tower for atmospheric research was
erected at the ATTO (Amazon Tall Tower Observatory) site
(02°08'38.8''S, 58°59'59.5''W) in the remote Amazonian rainforest.
The nearly pristine environment allows biosphere-atmosphere
studies within an ecosystem far away from large anthropogenic
emission sources. Since April 2012 vertical mixing ratio profiles
of H2O, CO2 and O3 were measured at 8 different heights between
0.05 m and 79.3 m. During five intensive campaigns (Oct-Dec 2012,
Oct-Nov 2013, Mar 2014, Aug-Sep 2014, Oct-Dec 2015) nitric oxide
(NO) and nitrogen dioxide (NO2) were also measured. We applied the
Multi-layer Canopy Chemical Exchange Model - MLC-CHEM to support
the analysis of the observed profiles of NOx and O3. This includes
inferring bi-directional surface-atmosphere exchange fluxes as
well as the role of the canopy interactions between the emissions,
dry deposition, chemistry and turbulent transport of trace gases.
During our investigation of diurnal and seasonal differences
between model and measurements, we conducted a set of sensitivity
studies to analyse the effects of changes in NOx-soil emissions,
in-canopy turbulence and resistances for O3 and NO2 uptake on wet
surfaces. These analyses suggest some modification in the
representation of some of the poorly constrained canopy processes
resulting in a significantly better comparison between the
simulated and measured exchange fluxes and concentrations.",
conference-location = "Vienna, Austria",
conference-year = "17-22 apr.",
language = "en",
targetfile = "wolff_comparison.pdf",
urlaccessdate = "28 mar. 2024"
}