Record ID

UAMe87706fbee9a4508b21917105487898a

Author

Adam Emmer Adam Emmer,, Undefined Affiliation

Melaine Le Roy Melaine Le Roy,, Undefined Affiliation

Ashim Sattar Ashim Sattar,, Undefined Affiliation

Bijeesh K. Veettil Bijeesh K. Veettil,, Undefined Affiliation

Jesús Alcalá-Reygosa Jesús Alcalá-Reygosa,, Undefined Affiliation

Néstor Campos Néstor Campos,, Undefined Affiliation

Jakub Małecki Jakub Małecki,, Pracownia Badań Kriosfery [nowa struktura organizacyjna] (SNP/WNGiG/JWNGiG)Szkoła Nauk Przyrodniczych [nowa struktura organizacyjna] (SNP)

Alejo Cochachin Alejo Cochachin,, Undefined Affiliation

Journal series

Journal of South American Earth Sciences, ISSN 0895-9811

Issue year

2021

Vol

109

Pages

1-12

Article number

103254

Keywords in original language

Glacier retreat, Glacier extent reconstruction, Moraine mapping, Glacial lakes, Cordillera blanca

ASJC Classification

1904 Earth-Surface Processes; 1907 Geology

Abstract in original language

In this study, we examine glacier retreat and associated processes in the Lejiamayu valley, central Cordillera Blanca, Peru (9.27◦S; 77.48◦W) since the Last Glacial Maximum (LGM). Based on detailed mapping of well- preserved moraines, we reconstruct glacier extent during the LGM, the Antarctic Cold Reversal (ACR) and the Little Ice Age (LIA), being 21.34 km2 (LGM), 13.68 km2 (ACR) and 6.84 km2 (LIA). We document that glacier extent decreased to 2,86 km2 since the end of the LIA in this catchment (ice loss 58%). In addition, we explore the colonization and growth of lichens and Schmidt-hammer rock test R-values over the deglaciated surfaces, sug- gesting a relationship to possible evironmental controls rather than to the timing of the exposure. Further, we use empirical glacier velocity-based equation to estimate maximum potential future volume of the new glacial lake forming in the upper part of the valley (4725 m a.s.l.; 2.2 Mm3). We conclude that previous estimates of future lake volume might have been underestimated and that the sufficiency of the glacial lake outburst flood (GLOF) mitigation measures implemented at downstream located Lake Lejiacocha (4628 m a.s.l.) should be revised in future.

DOI

DOI:10.1016/j.jsames.2021.103254 Opening in a new tab

Language

eng (en) English

Score (nominal)

70

Score source

journalList

Score

Ministerial score = 70.0, 28-03-2022, ArticleFromJournal

Publication indicators

WoS Citations = 1; Scopus SNIP: 2018 = 0.979; WoS Impact Factor: 2019 (2 years) = 1.704 - 2019 (5 years) =2.039

Share via portal AddThis

Refresh page

Refresh page

RDF

* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.