The exact extent, by which the hydrologic cycle in the Neotropics was affected by external forcing during the last deglaciation, remains poorly understood. Here we present a new paleo-rainfall reconstruction based on high-resolution speleothem Î 18 O records from the core region of the South American Monsoon System (SAMS), documenting the changing hydrological conditions over tropical South America (SA), in particular during abrupt millennial-scale events. This new record provides the best-resolved and most accurately constrained geochronology of any proxy from South America for this time period, spanning from the Last Glacial Maximum (LGM) to the mid-Holocene.
Bibliographical noteFunding Information:
This work was supported by the Funda??o de Amparo a Pesquisa do Estado de S?o Paulo, Brazil (FAPESP grants 2012/01187-4 and 2016/00299-4 to I.K.; 2009/12902-3 fellowship to M.S.P; 2012/03942-4, 2014/10095-1, 2015/08351-2 and 2016/15807-5 fellowships to V.F.N.; 2012/50260-6 and 2013/50297 to F.W.C), INCLINE/USP and PRIMO cooperative project (CNPq-IRD) to F.W.C and the US National Science Foundation NSF grants AGS-1303828 to MV and 1103403 to R.L.E and H.C.