A mid-Holocene climate reconstruction for eastern South America

• DOI: 10.5194/cp-9-2117-2013
• Publication Date: 2013-09-09T06:58:36Z
• Authors: L. F. Prado; I. Wainer; C. M. Chiessi; M.-P. Ledru; B. Turcq
• Keywords: Paleoclimatology; Holocene climatic optimum; Intertropical Convergence Zone

Abstract. The mid-Holocene (6000 calibrated years before present) is a key period in palaeoclimatology because incoming summer insolation was lower than during the late Holocene Southern Hemisphere, whereas opposite happened Northern Hemisphere. However, effects of decreased austral over South American climate have been poorly discussed by palaeodata syntheses. In addition, only few regional studies characterised America through multiproxy approach. Here, we present compilation palaeoclimate data for eastern America. We compiled 120 palaeoclimatological datasets, which were published 84 different papers. analysed here suggest water deficit scenario majority if compared to Holocene, with exception northeastern Brazil. Low caused reduced land–sea temperature contrast and hence weakened monsoon system circulation. This represented decrease precipitation Atlantic Convergence Zone area, saltier conditions along continental margin, lake levels.