Avaliação de fluxos dos COVBs quirais das Florestas Amazônica e Mata Atlântica pelo método de Acumuladores de Vórtices Estacionários (REA)

The study of Biosphere-Atmosphere interaction in tropicals is extremely important to understanding the climate global changes. The objective of this work is to correlate the Biogenic Volatile Organic Compounds upward and downward fluxes (BVOC) and their chirals in two sites: the Amazonian Forest, which one is the largest pristine forest in the world, and in the Atlantic Forest, with the biggest anthropogenic influence, and exist just 7% of original forest. The two forests are connected by the Hadley-Walker cell, or "flying rivers". Many of the BVOCs present are chiral, which means that they occur naturally as two mirror images of the same molecule. In this context, the atmospheric data was measured by a "Vertical Air Fluxes" sampler called Stationary Vortices Accumulators (REA), which processes the turbulent vortex accumulation data method, installed at the Amazon Tall Tower Observatory (ATTO) and in the suspended walkway in the Atlantic Forest, located in the Ecological Park (PEI), So Bernardo do Campo/ SP. The REA differentiates the upward and downward air fluxe by a sonic anemometer connected to an electronic panel coupled to Carbotrap/ TENAX cartridges. The analyzes were performed by thermal desorption coupled to a two-column gas chromatograph with detection by Flight Time mass spectrometer (TD-GCxGC / TOF), provided in partnership with the Max Planck Institute, Mainz / DE. The results shown that the speciation of BVOCs and their chirals in both forests correlate with the air fluxe increasing between the trees, differing directly in the proportion and identity of the forest with a bigger magnitude of fluxes of (-) -Pineno (2,98404333 mgC/mh) in the Amazon and ( +) Limonene (0,53536872 mgC/mh) in the Atlantic forest, as well as revealed a distinction behavior in the heat fluxes gradient by the REA method, between seasonality and day-time profile, result in a kind of construction of a chemical pathway between biosphere -atmosphere.