Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract)

Tobias Bolch; Alexandra Strel

Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract)

Tobias Bolch, Alexandra Strel

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Rock glaciers are abundant in Tien Shan. However, only few studies investigate their reaction to climate more in detail. We used 1971 Corona, 2012 GeoEye and 2016 Pléiades data to map and investigate the velocity and surface elevation changes of the rock glaciers in central-northern Tien Shan in Kazakhstan. We identified ~50 active rock glaciers covering an area of ~18km², which is more than 40% of the glacier cover. The average surface velocity was 0.44±0.30 ma^-1 with rates of up to 2ma^-1. On average the rock glaciers showed only a slight surface lowering of 0.04ma^-1for 1971-2012 and of 0.06 ma^-1for 2012-2016. Most of the rock glaciers showed similar patters: A surface elevation gain at their fronts indicating an advance, a significant lowering in the upper probably glacier affected parts and areas of elevation gain and lowering in between caused by flow patterns and loss of subsurface ice.

Original language	English
Title of host publication	5th European Conference on Permafrost, Book of Abstract
Editors	Philipe Deline, Xavier Bodin, Ludovic Ravanel, Chloé Barboux, Reynald Delaloye, Christophe Lambiel, Florence Magnin, Paolo Pogliotti, Philippe Schoeneich
Publisher	Laboratoire EDYTEM
Pages	48-49
Publication status	Published - 4 Feb 2019
Event	5th European Conference on Permafrost (EUCOP 2018) - Chamonix-Mont-Blanc, France Duration: 23 Jun 2018 → 1 Jul 2018 Conference number: 5 https://eucop2018.sciencesconf.org/

Conference

Conference	5th European Conference on Permafrost (EUCOP 2018)
Abbreviated title	EUCOP 2018
Country/Territory	France
City	Chamonix-Mont-Blanc
Period	23/06/18 → 1/07/18
Internet address	https://eucop2018.sciencesconf.org/

Keywords

Rock glacier
Digital elevation model
Elevation change
Velocity
Central Asia
Tien Shan

Access to Document

https://hal.archives-ouvertes.fr/hal-01816115/

Cite this

Bolch, T., & Strel, A. (2019). Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract). In P. Deline, X. Bodin, L. Ravanel, C. Barboux, R. Delaloye, C. Lambiel, F. Magnin, P. Pogliotti, & P. Schoeneich (Eds.), 5th European Conference on Permafrost, Book of Abstract (pp. 48-49). Laboratoire EDYTEM. https://hal.archives-ouvertes.fr/hal-01816115/

Bolch, Tobias ; Strel, Alexandra. / Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract). 5th European Conference on Permafrost, Book of Abstract. editor / Philipe Deline ; Xavier Bodin ; Ludovic Ravanel ; Chloé Barboux ; Reynald Delaloye ; Christophe Lambiel ; Florence Magnin ; Paolo Pogliotti ; Philippe Schoeneich. Laboratoire EDYTEM, 2019. pp. 48-49

@inproceedings{2121cf899a1a4862993bb90a8bf7cdd1,

title = "Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract)",

abstract = "Rock glaciers are abundant in Tien Shan. However, only few studies investigate their reaction to climate more in detail. We used 1971 Corona, 2012 GeoEye and 2016 Pl{\'e}iades data to map and investigate the velocity and surface elevation changes of the rock glaciers in central-northern Tien Shan in Kazakhstan. We identified ~50 active rock glaciers covering an area of ~18km², which is more than 40% of the glacier cover. The average surface velocity was 0.44±0.30 ma-1 with rates of up to 2ma-1. On average the rock glaciers showed only a slight surface lowering of 0.04ma-1 for 1971-2012 and of 0.06 ma-1 for 2012-2016. Most of the rock glaciers showed similar patters: A surface elevation gain at their fronts indicating an advance, a significant lowering in the upper probably glacier affected parts and areas of elevation gain and lowering in between caused by flow patterns and loss of subsurface ice.",

keywords = "Rock glacier, Digital elevation model, Elevation change, Velocity, Central Asia, Tien Shan",

author = "Tobias Bolch and Alexandra Strel",

year = "2019",

month = feb,

day = "4",

language = "English",

pages = "48--49",

editor = "Philipe Deline and Xavier Bodin and Ludovic Ravanel and Chlo{\'e} Barboux and Reynald Delaloye and Christophe Lambiel and Florence Magnin and Paolo Pogliotti and Philippe Schoeneich",

booktitle = "5th European Conference on Permafrost, Book of Abstract",

publisher = "Laboratoire EDYTEM",

note = "5th European Conference on Permafrost (EUCOP 2018), EUCOP 2018 ; Conference date: 23-06-2018 Through 01-07-2018",

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}

Bolch, T & Strel, A 2019, Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract). in P Deline, X Bodin, L Ravanel, C Barboux, R Delaloye, C Lambiel, F Magnin, P Pogliotti & P Schoeneich (eds), 5th European Conference on Permafrost, Book of Abstract. Laboratoire EDYTEM, pp. 48-49, 5th European Conference on Permafrost (EUCOP 2018), Chamonix-Mont-Blanc, France, 23/06/18. <https://hal.archives-ouvertes.fr/hal-01816115/>

Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract). / Bolch, Tobias; Strel, Alexandra.
5th European Conference on Permafrost, Book of Abstract. ed. / Philipe Deline; Xavier Bodin; Ludovic Ravanel; Chloé Barboux; Reynald Delaloye; Christophe Lambiel; Florence Magnin; Paolo Pogliotti; Philippe Schoeneich. Laboratoire EDYTEM, 2019. p. 48-49.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract)

AU - Bolch, Tobias

AU - Strel, Alexandra

N1 - Conference code: 5

PY - 2019/2/4

Y1 - 2019/2/4

N2 - Rock glaciers are abundant in Tien Shan. However, only few studies investigate their reaction to climate more in detail. We used 1971 Corona, 2012 GeoEye and 2016 Pléiades data to map and investigate the velocity and surface elevation changes of the rock glaciers in central-northern Tien Shan in Kazakhstan. We identified ~50 active rock glaciers covering an area of ~18km², which is more than 40% of the glacier cover. The average surface velocity was 0.44±0.30 ma-1 with rates of up to 2ma-1. On average the rock glaciers showed only a slight surface lowering of 0.04ma-1 for 1971-2012 and of 0.06 ma-1 for 2012-2016. Most of the rock glaciers showed similar patters: A surface elevation gain at their fronts indicating an advance, a significant lowering in the upper probably glacier affected parts and areas of elevation gain and lowering in between caused by flow patterns and loss of subsurface ice.

AB - Rock glaciers are abundant in Tien Shan. However, only few studies investigate their reaction to climate more in detail. We used 1971 Corona, 2012 GeoEye and 2016 Pléiades data to map and investigate the velocity and surface elevation changes of the rock glaciers in central-northern Tien Shan in Kazakhstan. We identified ~50 active rock glaciers covering an area of ~18km², which is more than 40% of the glacier cover. The average surface velocity was 0.44±0.30 ma-1 with rates of up to 2ma-1. On average the rock glaciers showed only a slight surface lowering of 0.04ma-1 for 1971-2012 and of 0.06 ma-1 for 2012-2016. Most of the rock glaciers showed similar patters: A surface elevation gain at their fronts indicating an advance, a significant lowering in the upper probably glacier affected parts and areas of elevation gain and lowering in between caused by flow patterns and loss of subsurface ice.

KW - Rock glacier

KW - Digital elevation model

KW - Elevation change

KW - Velocity

KW - Central Asia

KW - Tien Shan

M3 - Conference contribution

SP - 48

EP - 49

BT - 5th European Conference on Permafrost, Book of Abstract

A2 - Deline, Philipe

A2 - Bodin, Xavier

A2 - Ravanel, Ludovic

A2 - Barboux, Chloé

A2 - Delaloye, Reynald

A2 - Lambiel, Christophe

A2 - Magnin, Florence

A2 - Pogliotti, Paolo

A2 - Schoeneich, Philippe

PB - Laboratoire EDYTEM

T2 - 5th European Conference on Permafrost (EUCOP 2018)

Y2 - 23 June 2018 through 1 July 2018

ER -

Evolution of rock glaciers in northern Tien Shan, Central Asia, 1971 – 2016 (Extended Abstract)

Abstract

Conference

Keywords

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