Isotopic evidence for late Quaternary climatic change in tropical South America

Research Article| January 01, 2000 Isotopic evidence for late Quaternary climatic change in tropical South America Geoffrey Seltzer; Geoffrey Seltzer 1Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA Search for other works by this author on: GSW Google Scholar Donald Rodbell; Donald Rodbell 2Department of Geology, Union College, Schenectady, New York 12308, USA Search for other works by this author on: GSW Google Scholar Stephen Burns Stephen Burns 3Department of Geology, University of Bern, Switzerland Search for other works by this author on: GSW Google Scholar Geology (2000) 28 (1): 35–38. https://doi.org/10.1130/0091-7613(2000)28<35:IEFLQC>2.0.CO;2 Article history received: 14 May 1999 rev-recd: 06 Aug 1999 accepted: 14 Aug 1999 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Geoffrey Seltzer, Donald Rodbell, Stephen Burns; Isotopic evidence for late Quaternary climatic change in tropical South America. Geology 2000;; 28 (1): 35–38. doi: https://doi.org/10.1130/0091-7613(2000)28<35:IEFLQC>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The tropical hydrologic cycle affects atmospheric trace gases and global climate change, and thus records of hydrologic change encompassing a variety of time scales from the low latitudes are important in paleoclimatology. Isotopic analysis of calcite from Lake Junin, Peru, provides a record of hydrologic variability that spans the last glacial-interglacial transition in the southern tropics. The record reveals a 6‰ enrichment in δ18Ocalcite during the late glacial followed by a gradual depletion during the Holocene, which can be interpreted as a decrease followed by a long-term increase in effective moisture. Close agreement between δ18Ocalcite and rainy season insolation indicates that long-term changes in tropical hydrology were linked to orbital variations. Furthermore, hydrologic change was out of phase in the northern and southern tropics over this time period. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.