Origin and behaviour of dissolved chlorine and sodium in Brazilian rainforest

Abstract

Results for Cl and Na in rainfall, throughfall and stemflow at a rainforest site located near Manaus (Central Amazonia, Brazil) cannot be systematically assigned to marine contribution in rainfall. Rather, the results show that 50% of the whole input (stemflow plus throughfall) for Cl and 10% for Na are due to atmospheric deposition the remaining component being derived from biological release. Thus Cl and Na cannot always be used as tracers of marine origin for atmospheric input for forest environments far from the seashore.Results for Cl and Na in rainfall, throughfall and stemflow at a rainforest site located near Manaus (Central Amazonia, Brazil) cannot be systematically assigned to marine contribution in rainfall. Rather, the results show that 50% of the whole input (stemflow plus throughfall) for Cl and 10% for Na are due to atmospheric deposition the remaining component being derived from biological release. Thus Cl and Na cannot always be used as tracers of marine origin for atmospheric input for forest environments far from the seashore.