Acceleration and interannual variability of creep rates in mountain permafrost landforms (rock glacier velocities) in the European Alps in 1995-2022

被引：10

作者：

Kellerer-Pirklbauer, Andreas ^{[1
]}

Bodin, Xavier ^{[2
]}

Delaloye, Reynald ^{[3
]}

Lambiel, Christophe ^{[4
]}

Gartner-Roer, Isabelle ^{[5
]}

Bonnefoy-Demongeot, Mylene ^{[6
]}

Carturan, Luca ^{[7
,8
]}

Damm, Bodo ^{[9
]}

Eulenstein, Julia ^{[1
]}

Fischer, Andrea ^{[10
]}

Hartl, Lea ^{[10
]}

Ikeda, Atsushi ^{[11
]}

Kaufmann, Viktor ^{[12
]}

Krainer, Karl ^{[13
]}

Matsuoka, Norikazu ^{[11
]}

Di Cella, Umberto Morra ^{[14
]}

Noetzli, Jeannette ^{[15
]}

Seppi, Roberto ^{[16
]}

Scapozza, Cristian ^{[17
]}

Schoeneich, Philippe ^{[18
]}

Stocker-Waldhuber, Martin ^{[10
]}

Thibert, Emmanuel ^{[6
]}

Zumiani, Matteo ^{[19
]}

机构：

[1] Karl Franzens Univ Graz, Inst Geog & Reg Sci, Cascade Mt Proc & Mt Hazards Grp, Graz, Austria

[2] Univ Savoie Mt Blanc, EDYTEM, CNRS, Chambery, France

[3] Univ Fribourg, Dept Geosci, Fribourg, Switzerland

[4] Univ Lausanne, Inst Earth Surface Dynam, Lausanne, Switzerland

[5] Univ Zurich, Dept Geog, Zurich, Switzerland

[6] Univ Grenoble Alpes, Inst Geosci Environm IGE, Grenoble INP, CNRS,IRD,INRAE, F-38000 Grenoble, France

[7] Univ Padua, Dept Land Environm Agr & Forestry, Padua, Italy

[8] Univ Padua, Dept Geosci, Padua, Italy

[9] Univ Vechta, Dept Appl Phys Geog 2, Vechta, Germany

[10] Austrian Acad Sci, Inst Interdisciplinary Mt Res, A-1010 Innsbruck, Austria

[11] Univ Tsukuba, Tsukuba, Japan

[12] Graz Univ Technol, Inst Geodesy, Working Grp Remote Sensing & Photogrammetry, Graz, Austria

[13] Univ Innsbruck, Inst Geol, Innsbruck, Austria

[14] Reg Agcy Protect Environm ARPA Valle Aosta, St Christophe, Italy

[15] WSL Inst Snow & Avalanche Res SLF, Alpine Environm & Nat Hazards CERC, Davos, Switzerland

[16] Univ Pavia, Dept Earth & Environm Sci, Pavia, Italy

[17] Univ Appl Sci & Arts Southern Switzerland, Inst Earth Sci, Manno, Switzerland

[18] Univ Grenoble Alpes, Inst Geog Alpine, Grenoble, France

[19] Geol Serv Autonomous Prov Trento, Trento, Italy

来源：

ENVIRONMENTAL RESEARCH LETTERS | 2024年 / 19卷 / 03期

关键词：

Rock Glacier Velocity (RGV); Essential Climate Variable (ECV); terrestrial geodetic monitoring; annual surveys; European Alps; permafrost; MURTEL-CORVATSCH; SWISS ALPS; DESTABILIZATION; PHOTOGRAMMETRY; KINEMATICS; INVENTORY; EVOLUTION; REMAINS; AGE;

D O I：

10.1088/1748-9326/ad25a4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cryospheric long-term timeseries get increasingly important. To document climate-related effects on long-term viscous creep of ice-rich mountain permafrost, we investigated timeseries (1995-2022) of geodetically-derived Rock Glacier Velocity (RGV), i.e. spatially averaged interannual velocity timeseries related to a rock glacier (RG) unit or part of it. We considered 50 RGV from 43 RGs spatially covering the entire European Alps. Eight of these RGs are destabilized. Results show that RGV are distinctly variable ranging from 0.04 to 6.23 m a-1. Acceleration and deceleration at many RGs are highly correlated with similar behaviour over 2.5 decades for 15 timeseries. In addition to a general long-term, warming-induced trend of increasing velocities, three main phases of distinct acceleration (2000-2004, 2008-2015, 2018-2020), interrupted by deceleration or steady state conditions, were identified. The evolution is attributed to climate forcing and underlines the significance of RGV as a product of the Essential Climate Variable (ECV) permafrost. We show that RGV data are valuable as climate indicators, but such data should always be assessed critically considering changing local factors (geomorphic, thermal, hydrologic) and monitoring approaches. To extract a climate signal, larger RGV ensembles should be analysed. Criteria for selecting new RGV-sites are proposed.

引用

页数：21