Razão isotópica de Sr/Nd e composição elementar em aerossóis identificando fontes e potencial processo de fertilização no Atlântico Sul

Abstract

Due to arid conditions of Patagonian desert, the emission of mineral dust, is an important process caused by dominant winds responsible for deposited in the South Atlantic Ocean and the Antarctic ice. Aerosol samples collected aboard the Polar ship Admiral Maximiancruise along the Patagonia have their origin determined by Sr and Ndisotopes.Intheelementary characterization represented by trace metals and functioning as indicators of terrigenous continental transport and contribute to the determination of elements that act directly on photosynthetic activity. To effectively determine the isotopic signature was made an extensive inventory of South America and the Antarctic continent, totaling 583 sites investigated. From smpling water in south of Argentine Shelf Break Platform for 6 oceanographic stations carried on board the oceanographic vessel Ary support Rongel intense atmospheric study was done to evaluate the influence of the concentration of chlorophyll-a. All results will be associated with climatological studies from atmospheric modeling the retro-trajectories obtained from NASA through the HYSPLIT model and other satellite sensors. The data set obtained imply the accuracy of climate models and mainly contribute to the understanding about the latitudinal limits of source areas, significantly, they provide particulate matter and trace elements for the Antarctic ice sheet.