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Late Pleistocene–Holocene environmental and climatic history of a freshwater paramo ecosystem in the northern Andes
Author(s) -
Patiño Luisa,
Velez Maria Isabel,
Weber Marion,
Velásquezr César A.,
David Santiago,
Rueda Manuela,
Castañeda Ivonne,
Arboleda Diana
Publication year - 2020
Publication title -
journal of quaternary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.142
H-Index - 94
eISSN - 1099-1417
pISSN - 0267-8179
DOI - 10.1002/jqs.3249
Subject(s) - younger dryas , stadial , holocene , geology , glacial period , intertropical convergence zone , last glacial maximum , pleistocene , physical geography , oceanography , climatology , geography , precipitation , geomorphology , paleontology , meteorology
This study presents the first multi‐proxy palaeoenvironmental and palaeoclimatic history for northern South America based on the palaeolimnological reconstruction of a pond located in a dry paramo at 3570 masl. During the Last Glacial Maximum (LGM), the study area was under glacial conditions, then during global events Heinrich Stadial 1 (HS1), Bølling–Allerød (BA), and the Younger Dryas (YD), the pond expanded, accumulation rates and proxies for erosion reached the highest values, indicative of humid conditions, with maxima in humidity during the BA and YD. Dry conditions and pond desiccation occurred in the Greenlandian–Northgrippian and by 6010 cal a bp the area was transformed into the mire of today. Comparisons with records from other sites in South America indicate that changes in humidity are most likely controlled by the Intertropical Convergence Zone, mainly during the glacial and postglacial, and by changes in the Pacific Ocean, more pronounced after the YD.