Contemporary glacial lakes in the Peruvian Andes

Harrison, Stephan; Wilson, Ryan; Emmer, Adam; Yarlequé, Christian; Glasser, Neil F.; Torres, Juan; Caballero, Adriana; Araujo, Julia; Bennett, Georgina L.; Díaz‐Moreno, Alejandro; Garay, David; Jara, Harrinson; Poma, C.; Reynolds, John M.; Riveros, Christian; Romero, E. Melgarejo; Shannon, Sarah; Tinoco, Tito; Turpo, Efrain; Villafane, Hilbert

doi:10.1016/j.gloplacha.2021.103574

Cited by 28 publications

(17 citation statements)

References 59 publications

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“…Aggarwal et al, 2017;Muneeb et al, 2021;Rinzin et al, 2021), while statistic-based studies building on rigorous analysis of previous GLOFs are rare (McKillop and Clague, 2007a, b;Fischer et al, 2021). For a given lake, characterizing the current conditions and those prior to outburst remains challenging, highlighting the need for comprehensive regional lake inventories and lake evolution studies (Petrov et al, 2017;Buckel et al, 2018;Wilson et al, 2018;How et al, 2021;Lindgren et al, 2021;Mölg et al, 2021;Wood et al, 2021;Andreassen et al, 2022), global lake inventories (Shugar et al, 2020), regional GLOF inventories (e.g. Bat'ka et al, 2020;Emmer et al, 2022) and global GLOF inventories (Veh et al, 2022).…”

Section: Glof Triggers and Glof Susceptibility Indicatorsmentioning

confidence: 99%

Progress and challenges in glacial lake outburst flood research (2017–2021): a research community perspective

Emmer

Allen

Carey

et al. 2022

Nat. Hazards Earth Syst. Sci.

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Abstract. Glacial lake outburst floods (GLOFs) are among the most concerning consequences of retreating glaciers in mountain ranges worldwide. GLOFs have attracted significant attention amongst scientists and practitioners in the past 2 decades, with particular interest in the physical drivers and mechanisms of GLOF hazard and in socioeconomic and other human-related developments that affect vulnerabilities to GLOF events. This increased research focus on GLOFs is reflected in the gradually increasing number of papers published annually. This study offers an overview of recent GLOF research by analysing 594 peer-reviewed GLOF studies published between 2017 and 2021 (Web of Science and Scopus databases), reviewing the content and geographical focus as well as other characteristics of GLOF studies. This review is complemented with perspectives from the first GLOF conference (7–9 July 2021, online) where a global GLOF research community of major mountain regions gathered to discuss the current state of the art of integrated GLOF research. Therefore, representatives from 17 countries identified and elaborated trends and challenges and proposed possible ways forward to navigate future GLOF research, in four thematic areas: (i) understanding GLOFs – timing and processes; (ii) modelling GLOFs and GLOF process chains; (iii) GLOF risk management, prevention and warning; and (iv) human dimensions of GLOFs and GLOF attribution to climate change.

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Section: Glof Triggers and Glof Susceptibility Indicatorsmentioning

confidence: 99%

Progress and challenges in glacial lake outburst flood research (2017–2021): a research community perspective

Emmer

Allen

Carey

et al. 2022

Nat. Hazards Earth Syst. Sci.

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“…Previous studies (e.g. Drenkhan et al, 2018;Wood et al, 2021), have shown glacial lake expansion across each of these Cordilleras in line with climatic changes. The role of glacial lakes may be important in evaluating future change for tropical mountain glaciers, as lakes have been shown to accelerate ice recession when in direct contact (King et al, 2019).…”

Section: Future Perspectivesmentioning

confidence: 70%

Multi-Decadal Glacier Area and Mass Balance Change in the Southern Peruvian Andes

et al. 2022

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Around 70% of the world’s tropical glaciers are located in Peru, and they are melting rapidly in response to climate change. The glaciers of the data-sparse Southern Peruvian Andes, comprising the Cordilleras Vilcanota, Vilcabamba, and Urubamba, are a primary water source for thousands of people living in the rural foothills, and support people throughout the wider Cusco region. Here, we calculate geodetic mass balance for the Cordillera Vilcanota (−0.48 ± 0.07 m w.e. yr−1) using the ASTER satellite archive and derive a total loss of 3.18 ± 0.44 Gt ice between 2000 and 2020. Glacierised area has shrunk rapidly since the 1970s (losses of 54, 56, and 64% for the Cordilleras Vilcanota, Vilcabamba, and Urubamba respectively) as a consequence of changing climatic patterns, with low-lying glaciers receding the most across all regions. We calculate a rise in the median elevation of glaciers ranging from 15.9 m per decade over the Quelccaya ice cap in the Cordillera Vilcanota, to 32.8 m per decade in the Cordillera Vilcabamba, over the period 1975 to 2020. This change implies an increased hazard potential as the mountain regions become destabilised, and will lead to increasing pressure on fresh water supply as meltwater streamflow decreases and river discharge becomes increasingly, and irreversibly, variable.

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“…2020, 2022; Wood et al . 2021) identify Llaca Lake as a large lake, yet calculations of water volume in the lake do not account for the volume of water stored in ice buried beneath lacustrine sediments (e.g. Cook & Quincey 2015).…”

Section: Figmentioning

confidence: 99%

Landsystem analysis of a tropical moraine‐dammed supraglacial lake, Llaca Lake, Cordillera Blanca, Perú

Pérez

Eyles

Lee

et al. 2023

Boreas

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Tropical glaciers of the Cordillera Blanca, Per u are rapidly thinning and retreating as a result of climate warming. The retreat of these glaciers along narrow linear bedrock valleys has increased the number and size of moraine-dammed glacial lakes formed in the valleys. This study aims to identify the geomorphological and sedimentological characteristics of an enlarging moraine-dammed supraglacial lake (Llaca Lake) in the Cordillera Blanca. Field-based sedimentological observations and geomorphological mapping were combined with remotely sensed data and a photogrammetric model derived from aerial surveys by an uncrewed aerial vehicle to identify landform-sediment assemblages. The geomorphological and sedimentological characteristics of Llaca Lake are synthesized into three landsystem zones: Zone 1: distal portions of Llaca Lake and the latero-frontal moraine; Zone 2: the central zone of icecored hummocks; and Zone 3: the active glacier margin. These zones are differentiated based on the spatial distribution of landforms, sediments, and active geomorphological processes. This is the first study to describe the landform-sediment assemblages in atropical moraine-dammed supraglacial lake system and provides a framework for further landsystem element analysis of these growing supraglacial lakes in rapidly deglaciating high-altitude environments.

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Contemporary glacial lakes in the Peruvian Andes

Cited by 28 publications

References 59 publications

Progress and challenges in glacial lake outburst flood research (2017–2021): a research community perspective

Progress and challenges in glacial lake outburst flood research (2017–2021): a research community perspective

Multi-Decadal Glacier Area and Mass Balance Change in the Southern Peruvian Andes

Landsystem analysis of a tropical moraine‐dammed supraglacial lake, Llaca Lake, Cordillera Blanca, Perú

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