Analiza δ13C i δ34C w profilach torfowych a zmiany globalne

Abstract

Δ13C AND Δ34S ANALYSIS IN PEAT PROFILES AND GLOBAL CHANGES Summary Carbon and sulfur isotope analysis and organic sulfur concentration measurements have been carried out in two peat profiles from Poland and three peat profiles from Thailand. These profiles represent last two thousand years. It was shown that the main factor controlling carbon isotppe ratio in peat is temperature, and the main factor controlling organic sulfur isotope ratio in peat is water level on the peat bog. In general, all the profiles examined show coincidence in carbon isotope variation in time. It may prove that global climatic variations are recorded in peat. In the younge-most levels of peat, distinct shift of the δ13C into negative direction may be resulted by increase in anthropogenic carbon dioxide coming from fossil fuel combustion. δ13C and δ34S variation evidence that climate cycles may vary with time in a matter of less than 100 years. Small sea-level increase in SE Thailand, from VI to XII century was probably local. Since XV/XVI century unification of atmospheric circulation and climatic variations in Central and Western Europe have taken place.