11.06.2015 Kolloquium: Stefan Wolf
Stefan Wolf, Max Planck Institute for Chemistry, Mainz, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brasilien
The Amazon rainforest is the world´s largest contiguous ecosystem. Being about 6 million km2 it is larger than Central- West- and Southern-Europe together. The forest therefore plays an important role in the Earth´s hydrological, energy and carbon cycles. As one of the last regions on earth with minimal anthropogenic influence, the remote Amazon inside this threatened ecosystem is therefore ideal for studying trace gas exchange in a natural environment in absence of nearby emission sources.
In January 2015 the construction of the 325 meter high ATTO tower (Amazonian Tall Tower Observatory) (02°08’38.8’’S, 58°59’59.5’’W) was finished in the remote rainforest, and it represents right now the tallest structure in South America. Atmospheric measurements until its upper height are expected to bring new and promising insights regarding forest-atmosphere interactions and vertical exchange processes inside the boundary layer. In 2011, two 80 m high towers for atmospheric research were already erected at the ATTO site and since April 2012 atmospheric trace gas profiles as well as complex and very extensive aerosol characteristics are measured. Among other trace gases, vertical mixing ratio profiles of H2O, CO2 and O3 are monitored continuously at 8 different heights between 0.05 m and 79.3 m and during four intensive campaigns (Oct.-Dec. 2012, Oct-Nov 2013, Mar 2014, Aug-Sep 2014) NO and NO2 measurements were additionally included in that profile.
In this seminar I would like to give an overview of the ATTO project, its history, the current state of the art and the running measurements on the smaller towers, including some interesting results.
11. Juni 2015