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Late Holocene fluctuations of Qori Kalis outlet glacier, Quelccaya ice cap, Peruvian Andes

Justin S. Stroup, Meredith A. Kelly, Thomas V. Lowell, Patrick J. Applegate and Jennifer A. Howley
Late Holocene fluctuations of Qori Kalis outlet glacier, Quelccaya ice cap, Peruvian Andes
Geology (Boulder) (February 2014) 42 (4): 347-350

Abstract

The temporal and spatial patterns of late Holocene climate conditions provide valuable information for testing hypothesized mechanisms of recent climate changes. As a proxy for late Holocene climate in the southern tropics, we present a (super 10) Be chronology of moraines deposited by Qori Kalis, an outlet glacier of Quelccaya Ice Cap in Peru. The Qori Kalis moraines are located downflow from the Quelccaya ice cores and provide the first glacial extent record that can be compared directly to annually resolved tropical ice core records. Qori Kalis advanced to its late Holocene maximum extent prior to 520 + or - 60 yr before CE 2009, when Quelccaya ice core net accumulation values were at or below their late Holocene average. Subsequent glacial retreat between approximately 520 and 330 yr before CE 2009 coincides with the highest net accumulation values of the approximately 1800-yr-long ice core record. Therefore, we suggest that temperature, rather than net accumulation, was the primary driver of these glacial fluctuations. Comparison of the late Holocene fluctuations of Qori Kalis glacier with glaciers in the southern tropical Andes, Patagonian Andes, Switzerland, Alaska, and New Zealand suggests globally synchronous, centennial-scale cold events.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 42
Serial Issue: 4
Title: Late Holocene fluctuations of Qori Kalis outlet glacier, Quelccaya ice cap, Peruvian Andes
Affiliation: Dartmouth College, Department of Earth Sciences, Hanover, NH, United States
Pages: 347-350
Published: 20140225
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 38
Accession Number: 2014-024139
Categories: Quaternary geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2014131
Illustration Description: illus. incl. geol. sketch map
S13°55'60" - S13°55'60", W70°49'60" - W70°49'60"
Secondary Affiliation: University of Cincinnati, USA, United StatesPennsylvania State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201415
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