The Use of SCYAMACHY Satellite Data and Emission Inventories in a Precipitation Chemistry Survey in Ecuador.
Makowski Giannoni, Sandro1; Rollenbeck, Rütger1; Fabian, Peter2; Bendix, Jörg1
1Philipps University of Marburg, GERMANY; 2Technical University of Munich, GERMANY

Current increase in atmospheric nitrogen depositions in tropical regions is expected to have deletereous consequences in land and water ecosystems. Tropical mountain forests as in the Andes of South-eastern Ecuador are not excluded and even especially vulnerable because of its location under the influence of the tropical easterlies and downwind from nitrogen emitting sources, like forests fires in the Brazilian Amazon. However, until present the interaction of short and long-range transport from various sources is not completely understood. In mountain environments topography causes complex streamflow and rainfall patterns, governing the atmospheric transmission of pollutants and the intensity and spatial variability of depositions. The main objective of the current study is to link spatio-temporal patterns of upwind nitrogen emissions and nitrate deposition in the San Francisco Valley (eastern Andes of southern Ecuador) at different altitudinal levels. The work is based on SCIAMACHY retrieved-NO2 atmospheric concentrations over South America, NOx biomass burning emissions from the Global Fire Emissions Database (GFEDv3), and SA-INV inventory for urban emissions in South America. The emission data is used as input for FLEXTRA backward trajectory modeling to model the transport to the study area.