Articles | Volume 11, issue 5
https://doi.org/10.5194/esurf-11-899-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-11-899-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 Sep 2023
Research article |
| 19 Sep 2023
| 19 Sep 2023
Estimating surface water availability in high mountain rock slopes using a numerical energy balance model
Matan Ben-Asher
CORRESPONDING AUTHOR
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
Florence Magnin
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
Sebastian Westermann
Department of Geosciences, University of Oslo, Oslo, Norway
Josué Bock
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
Emmanuel Malet
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
Johan Berthet
Styx 4D, Le Bourget du Lac, France
Ludovic Ravanel
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
Philip Deline
EDYTEM laboratory, Université Savoie Mont Blanc, CNRS, Le
Bourget du Lac, 73376, France
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The reactivity of local to regional hydrosystems to global changes remains understated in East African climate models. By reconstructing a chronicle of seasonal floods and droughts from a lacustrine sedimentary core, this paper highlights the impact of El Niño anomalies in the Awash River valley (Ethiopia). Studying regional hydrosystem feedbacks to global atmospheric anomalies is essential for better comprehending and mitigating the effects of global warming in extreme environments.
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Using a model that can simulate the evolution of Arctic permafrost over centuries to millennia, we find that post-industrialization permafrost warming has three "hotspots" in NE Canada, N Alaska, and W Siberia. The extent of near-surface permafrost has decreased substantially since 1850, with the largest area losses occurring in the last 50 years. The simulations also show that volcanic eruptions have in some cases counteracted the loss of near-surface permafrost for a few decades.
Bernd Etzelmüller, Ketil Isaksen, Justyna Czekirda, Sebastian Westermann, Christin Hilbich, and Christian Hauck
The Cryosphere, 17, 5477–5497, https://doi.org/10.5194/tc-17-5477-2023, https://doi.org/10.5194/tc-17-5477-2023, 2023
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Permafrost (permanently frozen ground) is widespread in the mountains of Norway and Iceland. Several boreholes were drilled after 1999 for long-term permafrost monitoring. We document a strong warming of permafrost, including the development of unfrozen bodies in the permafrost. Warming and degradation of mountain permafrost may lead to more natural hazards.
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Here we explore how to improve hyper-resolution (5 m) distributed snowpack simulations using sparse observations, which do not provide information from all the areas of the simulation domain. We propose a new way of propagating information throughout the simulations adapted to the hyper-resolution, which could also be used to improve simulations of other nature. The method has been implemented in an open-source data assimilation tool that is readily accessible to everyone.
Anatoly O. Sinitsyn, Sara Bazin, Rasmus Benestad, Bernd Etzelmüller, Ketil Isaksen, Hanne Kvitsand, Julia Lutz, Andrea L. Popp, Lena Rubensdotter, and Sebastian Westermann
EGUsphere, https://doi.org/10.5194/egusphere-2023-2950, https://doi.org/10.5194/egusphere-2023-2950, 2023
Preprint archived
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This study looked at under the ground on Svalbard, an archipelago close to the North Pole. We found something very surprising – there is water under the all year around frozen soil. This was not known before. This water could be used for drinking if we manage it carefully. This is important because getting clean drinking water is very difficult in Svalbard, and other Arctic places. Also, because the climate is getting warmer, there might be even more water underground in the future.
Léo C. P. Martin, Sebastian Westermann, Michele Magni, Fanny Brun, Joel Fiddes, Yanbin Lei, Philip Kraaijenbrink, Tamara Mathys, Moritz Langer, Simon Allen, and Walter W. Immerzeel
Hydrol. Earth Syst. Sci., 27, 4409–4436, https://doi.org/10.5194/hess-27-4409-2023, https://doi.org/10.5194/hess-27-4409-2023, 2023
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Across the Tibetan Plateau, many large lakes have been changing level during the last decades as a response to climate change. In high-mountain environments, water fluxes from the land to the lakes are linked to the ground temperature of the land and to the energy fluxes between the ground and the atmosphere, which are modified by climate change. With a numerical model, we test how these water and energy fluxes have changed over the last decades and how they influence the lake level variations.
Juditha Aga, Julia Boike, Moritz Langer, Thomas Ingeman-Nielsen, and Sebastian Westermann
The Cryosphere, 17, 4179–4206, https://doi.org/10.5194/tc-17-4179-2023, https://doi.org/10.5194/tc-17-4179-2023, 2023
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This study presents a new model scheme for simulating ice segregation and thaw consolidation in permafrost environments, depending on ground properties and climatic forcing. It is embedded in the CryoGrid community model, a land surface model for the terrestrial cryosphere. We describe the model physics and functionalities, followed by a model validation and a sensitivity study of controlling factors.
Catharina Dieleman, Philip Deline, Susan Ivy Ochs, Patricia Hug, Jordan Aaron, Marcus Christl, and Naki Akçar
EGUsphere, https://doi.org/10.5194/egusphere-2023-1873, https://doi.org/10.5194/egusphere-2023-1873, 2023
Preprint withdrawn
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Valleys in the Alps are shaped by glaciers, rivers, mass movements, and slope processes. An understanding of such processes is of great importance in hazard mitigation. We focused on the evolution of the Frébouge cone, which is composed of glacial, debris flow, rock avalanche, and snow avalanche deposits. Debris flows started to form the cone prior to ca. 2 ka ago. In addition, the cone was overrun by a 10 Mm3 large rock avalanche at 1.3 ± 0.1 ka and by the Frébouge glacier at 300 ± 40 a.
Brian Groenke, Moritz Langer, Jan Nitzbon, Sebastian Westermann, Guillermo Gallego, and Julia Boike
The Cryosphere, 17, 3505–3533, https://doi.org/10.5194/tc-17-3505-2023, https://doi.org/10.5194/tc-17-3505-2023, 2023
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It is now well known from long-term temperature measurements that Arctic permafrost, i.e., ground that remains continuously frozen for at least 2 years, is warming in response to climate change. Temperature, however, only tells half of the story. In this study, we use computer modeling to better understand how the thawing and freezing of water in the ground affects the way permafrost responds to climate change and what temperature trends can and cannot tell us about how permafrost is changing.
Louise Steffensen Schmidt, Thomas Vikhamar Schuler, Erin Emily Thomas, and Sebastian Westermann
The Cryosphere, 17, 2941–2963, https://doi.org/10.5194/tc-17-2941-2023, https://doi.org/10.5194/tc-17-2941-2023, 2023
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Here, we present high-resolution simulations of glacier mass balance (the gain and loss of ice over a year) and runoff on Svalbard from 1991–2022, one of the fastest warming regions in the Arctic. The simulations are created using the CryoGrid community model. We find a small overall loss of mass over the simulation period of −0.08 m yr−1 but with no statistically significant trend. The average runoff was found to be 41 Gt yr−1, with a significant increasing trend of 6.3 Gt per decade.
Justyna Czekirda, Bernd Etzelmüller, Sebastian Westermann, Ketil Isaksen, and Florence Magnin
The Cryosphere, 17, 2725–2754, https://doi.org/10.5194/tc-17-2725-2023, https://doi.org/10.5194/tc-17-2725-2023, 2023
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We assess spatio-temporal permafrost variations in selected rock walls in Norway over the last 120 years. Ground temperature is modelled using the two-dimensional ground heat flux model CryoGrid 2D along nine profiles. Permafrost probably occurs at most sites. All simulations show increasing ground temperature from the 1980s. Our simulations show that rock wall permafrost with a temperature of −1 °C at 20 m depth could thaw at this depth within 50 years.
Norbert Pirk, Kristoffer Aalstad, Yeliz A. Yilmaz, Astrid Vatne, Andrea L. Popp, Peter Horvath, Anders Bryn, Ane Victoria Vollsnes, Sebastian Westermann, Terje Koren Berntsen, Frode Stordal, and Lena Merete Tallaksen
Biogeosciences, 20, 2031–2047, https://doi.org/10.5194/bg-20-2031-2023, https://doi.org/10.5194/bg-20-2031-2023, 2023
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We measured the land–atmosphere exchange of CO2 and water vapor in alpine Norway over 3 years. The extremely snow-rich conditions in 2020 reduced the total annual evapotranspiration to 50 % and reduced the growing-season carbon assimilation to turn the ecosystem from a moderate annual carbon sink to an even stronger source. Our analysis suggests that snow cover anomalies are driving the most consequential short-term responses in this ecosystem’s functioning.
Sebastian Westermann, Thomas Ingeman-Nielsen, Johanna Scheer, Kristoffer Aalstad, Juditha Aga, Nitin Chaudhary, Bernd Etzelmüller, Simon Filhol, Andreas Kääb, Cas Renette, Louise Steffensen Schmidt, Thomas Vikhamar Schuler, Robin B. Zweigel, Léo Martin, Sarah Morard, Matan Ben-Asher, Michael Angelopoulos, Julia Boike, Brian Groenke, Frederieke Miesner, Jan Nitzbon, Paul Overduin, Simone M. Stuenzi, and Moritz Langer
Geosci. Model Dev., 16, 2607–2647, https://doi.org/10.5194/gmd-16-2607-2023, https://doi.org/10.5194/gmd-16-2607-2023, 2023
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The CryoGrid community model is a new tool for simulating ground temperatures and the water and ice balance in cold regions. It is a modular design, which makes it possible to test different schemes to simulate, for example, permafrost ground in an efficient way. The model contains tools to simulate frozen and unfrozen ground, snow, glaciers, and other massive ice bodies, as well as water bodies.
Cas Renette, Kristoffer Aalstad, Juditha Aga, Robin Benjamin Zweigel, Bernd Etzelmüller, Karianne Staalesen Lilleøren, Ketil Isaksen, and Sebastian Westermann
Earth Surf. Dynam., 11, 33–50, https://doi.org/10.5194/esurf-11-33-2023, https://doi.org/10.5194/esurf-11-33-2023, 2023
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One of the reasons for lower ground temperatures in coarse, blocky terrain is a low or varying soil moisture content, which most permafrost modelling studies did not take into account. We used the CryoGrid community model to successfully simulate this effect and found markedly lower temperatures in well-drained, blocky deposits compared to other set-ups. The inclusion of this drainage effect is another step towards a better model representation of blocky mountain terrain in permafrost regions.
Norbert Pirk, Kristoffer Aalstad, Sebastian Westermann, Astrid Vatne, Alouette van Hove, Lena Merete Tallaksen, Massimo Cassiani, and Gabriel Katul
Atmos. Meas. Tech., 15, 7293–7314, https://doi.org/10.5194/amt-15-7293-2022, https://doi.org/10.5194/amt-15-7293-2022, 2022
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In this study, we show how sparse and noisy drone measurements can be combined with an ensemble of turbulence-resolving wind simulations to estimate uncertainty-aware surface energy exchange. We demonstrate the feasibility of this drone data assimilation framework in a series of synthetic and real-world experiments. This new framework can, in future, be applied to estimate energy and gas exchange in heterogeneous landscapes more representatively than conventional methods.
Suvrat Kaushik, Ludovic Ravanel, Florence Magnin, Yajing Yan, Emmanuel Trouve, and Diego Cusicanqui
The Cryosphere, 16, 4251–4271, https://doi.org/10.5194/tc-16-4251-2022, https://doi.org/10.5194/tc-16-4251-2022, 2022
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Climate change impacts all parts of the cryosphere but most importantly the smaller ice bodies like ice aprons (IAs). This study is the first attempt on a regional scale to assess the impacts of the changing climate on these small but very important ice bodies. Our study shows that IAs have consistently lost mass over the past decades. The effects of climate variables, particularly temperature and precipitation and topographic factors, were analysed on the loss of IA area.
Juri Palmtag, Jaroslav Obu, Peter Kuhry, Andreas Richter, Matthias B. Siewert, Niels Weiss, Sebastian Westermann, and Gustaf Hugelius
Earth Syst. Sci. Data, 14, 4095–4110, https://doi.org/10.5194/essd-14-4095-2022, https://doi.org/10.5194/essd-14-4095-2022, 2022
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The northern permafrost region covers 22 % of the Northern Hemisphere and holds almost twice as much carbon as the atmosphere. This paper presents data from 651 soil pedons encompassing more than 6500 samples from 16 different study areas across the northern permafrost region. We use this dataset together with ESA's global land cover dataset to estimate soil organic carbon and total nitrogen storage up to 300 cm soil depth, with estimated values of 813 Pg for carbon and 55 Pg for nitrogen.
Josué Bock, Jan Kaiser, Max Thomas, Andreas Bott, and Roland von Glasow
Geosci. Model Dev., 15, 5807–5828, https://doi.org/10.5194/gmd-15-5807-2022, https://doi.org/10.5194/gmd-15-5807-2022, 2022
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MISTRA-v9.0 is an atmospheric boundary layer chemistry model. The model includes a detailed particle description with regards to the microphysics, gas–particle interactions, and liquid phase chemistry within particles. Version 9.0 is the first release of MISTRA as an open-source community model. This paper presents a thorough description of the model characteristics and components. We show some examples of simulations reproducing previous studies with MISTRA with good consistency.
S. Kaushik, S. Leinss, L. Ravanel, E. Trouvé, Y. Yan, and F. Magnin
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., V-3-2022, 325–332, https://doi.org/10.5194/isprs-annals-V-3-2022-325-2022, https://doi.org/10.5194/isprs-annals-V-3-2022-325-2022, 2022
Noah D. Smith, Eleanor J. Burke, Kjetil Schanke Aas, Inge H. J. Althuizen, Julia Boike, Casper Tai Christiansen, Bernd Etzelmüller, Thomas Friborg, Hanna Lee, Heather Rumbold, Rachael H. Turton, Sebastian Westermann, and Sarah E. Chadburn
Geosci. Model Dev., 15, 3603–3639, https://doi.org/10.5194/gmd-15-3603-2022, https://doi.org/10.5194/gmd-15-3603-2022, 2022
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The Arctic has large areas of small mounds that are caused by ice lifting up the soil. Snow blown by wind gathers in hollows next to these mounds, insulating them in winter. The hollows tend to be wetter, and thus the soil absorbs more heat in summer. The warm wet soil in the hollows decomposes, releasing methane. We have made a model of this, and we have tested how it behaves and whether it looks like sites in Scandinavia and Siberia. Sometimes we get more methane than a model without mounds.
Sarah E. Chadburn, Eleanor J. Burke, Angela V. Gallego-Sala, Noah D. Smith, M. Syndonia Bret-Harte, Dan J. Charman, Julia Drewer, Colin W. Edgar, Eugenie S. Euskirchen, Krzysztof Fortuniak, Yao Gao, Mahdi Nakhavali, Włodzimierz Pawlak, Edward A. G. Schuur, and Sebastian Westermann
Geosci. Model Dev., 15, 1633–1657, https://doi.org/10.5194/gmd-15-1633-2022, https://doi.org/10.5194/gmd-15-1633-2022, 2022
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We present a new method to include peatlands in an Earth system model (ESM). Peatlands store huge amounts of carbon that accumulates very slowly but that can be rapidly destabilised, emitting greenhouse gases. Our model captures the dynamic nature of peat by simulating the change in surface height and physical properties of the soil as carbon is added or decomposed. Thus, we model, for the first time in an ESM, peat dynamics and its threshold behaviours that can lead to destabilisation.
Jacques Mourey, Pascal Lacroix, Pierre-Allain Duvillard, Guilhem Marsy, Marco Marcer, Emmanuel Malet, and Ludovic Ravanel
Nat. Hazards Earth Syst. Sci., 22, 445–460, https://doi.org/10.5194/nhess-22-445-2022, https://doi.org/10.5194/nhess-22-445-2022, 2022
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More frequent rockfalls in high alpine environments due to climate change are a growing threat to mountaineers. This hazard is particularly important on the classic route up Mont Blanc. Our results show that rockfalls are most frequent during snowmelt periods and the warmest hours of the day, and that mountaineers do not adapt to the local rockfall hazard when planning their ascent. Disseminating the knowledge acquired from our study caused management measures to be implemented for the route.
Bernd Etzelmüller, Justyna Czekirda, Florence Magnin, Pierre-Allain Duvillard, Ludovic Ravanel, Emanuelle Malet, Andreas Aspaas, Lene Kristensen, Ingrid Skrede, Gudrun D. Majala, Benjamin Jacobs, Johannes Leinauer, Christian Hauck, Christin Hilbich, Martina Böhme, Reginald Hermanns, Harald Ø. Eriksen, Tom Rune Lauknes, Michael Krautblatter, and Sebastian Westermann
Earth Surf. Dynam., 10, 97–129, https://doi.org/10.5194/esurf-10-97-2022, https://doi.org/10.5194/esurf-10-97-2022, 2022
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This paper is a multi-authored study documenting the possible existence of permafrost in permanently monitored rockslides in Norway for the first time by combining a multitude of field data, including geophysical surveys in rock walls. The paper discusses the possible role of thermal regime and rockslide movement, and it evaluates the possible impact of atmospheric warming on rockslide dynamics in Norwegian mountains.
Léo C. P. Martin, Jan Nitzbon, Johanna Scheer, Kjetil S. Aas, Trond Eiken, Moritz Langer, Simon Filhol, Bernd Etzelmüller, and Sebastian Westermann
The Cryosphere, 15, 3423–3442, https://doi.org/10.5194/tc-15-3423-2021, https://doi.org/10.5194/tc-15-3423-2021, 2021
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It is important to understand how permafrost landscapes respond to climate changes because their thaw can contribute to global warming. We investigate how a common permafrost morphology degrades using both field observations of the surface elevation and numerical modeling. We show that numerical models accounting for topographic changes related to permafrost degradation can reproduce the observed changes in nature and help us understand how parameters such as snow influence this phenomenon.
Josué Bock, Martine Michou, Pierre Nabat, Manabu Abe, Jane P. Mulcahy, Dirk J. L. Olivié, Jörg Schwinger, Parvadha Suntharalingam, Jerry Tjiputra, Marco van Hulten, Michio Watanabe, Andrew Yool, and Roland Séférian
Biogeosciences, 18, 3823–3860, https://doi.org/10.5194/bg-18-3823-2021, https://doi.org/10.5194/bg-18-3823-2021, 2021
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In this study we analyse surface ocean dimethylsulfide (DMS) concentration and flux to the atmosphere from four CMIP6 Earth system models over the historical and ssp585 simulations.
Our analysis of contemporary (1980–2009) climatologies shows that models better reproduce observations in mid to high latitudes. The models disagree on the sign of the trend of the global DMS flux from 1980 onwards. The models agree on a positive trend of DMS over polar latitudes following sea-ice retreat dynamics.
S. Kaushik, L. Ravanel, F. Magnin, Y. Yan, E. Trouve, and D. Cusicanqui
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 469–475, https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-469-2021, https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-469-2021, 2021
Juditha Undine Schmidt, Bernd Etzelmüller, Thomas Vikhamar Schuler, Florence Magnin, Julia Boike, Moritz Langer, and Sebastian Westermann
The Cryosphere, 15, 2491–2509, https://doi.org/10.5194/tc-15-2491-2021, https://doi.org/10.5194/tc-15-2491-2021, 2021
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This study presents rock surface temperatures (RSTs) of steep high-Arctic rock walls on Svalbard from 2016 to 2020. The field data show that coastal cliffs are characterized by warmer RSTs than inland locations during winter seasons. By running model simulations, we analyze factors leading to that effect, calculate the surface energy balance and simulate different future scenarios. Both field data and model results can contribute to a further understanding of RST in high-Arctic rock walls.
Thomas Schneider von Deimling, Hanna Lee, Thomas Ingeman-Nielsen, Sebastian Westermann, Vladimir Romanovsky, Scott Lamoureux, Donald A. Walker, Sarah Chadburn, Erin Trochim, Lei Cai, Jan Nitzbon, Stephan Jacobi, and Moritz Langer
The Cryosphere, 15, 2451–2471, https://doi.org/10.5194/tc-15-2451-2021, https://doi.org/10.5194/tc-15-2451-2021, 2021
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Climate warming puts infrastructure built on permafrost at risk of failure. There is a growing need for appropriate model-based risk assessments. Here we present a modelling study and show an exemplary case of how a gravel road in a cold permafrost environment in Alaska might suffer from degrading permafrost under a scenario of intense climate warming. We use this case study to discuss the broader-scale applicability of our model for simulating future Arctic infrastructure failure.
Jan Nitzbon, Moritz Langer, Léo C. P. Martin, Sebastian Westermann, Thomas Schneider von Deimling, and Julia Boike
The Cryosphere, 15, 1399–1422, https://doi.org/10.5194/tc-15-1399-2021, https://doi.org/10.5194/tc-15-1399-2021, 2021
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We used a numerical model to investigate how small-scale landscape heterogeneities affect permafrost thaw under climate-warming scenarios. Our results show that representing small-scale heterogeneities in the model can decide whether a landscape is water-logged or well-drained in the future. This in turn affects how fast permafrost thaws under warming. Our research emphasizes the importance of considering small-scale processes in model assessments of permafrost thaw under climate change.
Simone Maria Stuenzi, Julia Boike, William Cable, Ulrike Herzschuh, Stefan Kruse, Luidmila A. Pestryakova, Thomas Schneider von Deimling, Sebastian Westermann, Evgenii S. Zakharov, and Moritz Langer
Biogeosciences, 18, 343–365, https://doi.org/10.5194/bg-18-343-2021, https://doi.org/10.5194/bg-18-343-2021, 2021
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Boreal forests in eastern Siberia are an essential component of global climate patterns. We use a physically based model and field measurements to study the interactions between forests, permanently frozen ground and the atmosphere. We find that forests exert a strong control on the thermal state of permafrost through changing snow cover dynamics and altering the surface energy balance, through absorbing most of the incoming solar radiation and suppressing below-canopy turbulent fluxes.
Lei Cai, Hanna Lee, Kjetil Schanke Aas, and Sebastian Westermann
The Cryosphere, 14, 4611–4626, https://doi.org/10.5194/tc-14-4611-2020, https://doi.org/10.5194/tc-14-4611-2020, 2020
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A sub-grid representation of excess ground ice in the Community Land Model (CLM) is developed as novel progress in modeling permafrost thaw and its impacts under the warming climate. The modeled permafrost degradation with sub-grid excess ice follows the pathway that continuous permafrost transforms into discontinuous permafrost before it disappears, including surface subsidence and talik formation, which are highly permafrost-relevant landscape changes excluded from most land models.
Cited articles
Allen, S. K., Gruber, S., and Owens, I. F.: Exploring steep bedrock
permafrost and its relationship with recent slope failures in the Southern
Alps of New Zealand, Permafrost Periglac., 20, 345–356,
https://doi.org/10.1002/ppp.658, 2009.
Bear, J.: Dynamics of Fluids in Porous Media, Courier Corporation, 806 pp.,
ISBN 10 044400114X,
ISBN 13 978-0444001146, 1988.
Ben-Asher, M.: Estimating surface water availability in high mountain rock slopes using a numerical energy balance model, Zenodo [data set], https://doi.org/10.5281/zenodo.7224692, 2022.
Bertini, G., Marcucci, M., Nevini, R., Passerini, P., and Sguazzoni, G.:
Patterns of faulting in the Mont Blanc granite, Tectonophysics, 111,
65–106, https://doi.org/10.1016/0040-1951(85)90066-6, 1985.
Blöschl, G., Kirnbauer, R., and Gutknecht, D.: Distributed Snowmelt
Simulations in an Alpine Catchment: 1. Model Evaluation on the Basis of Snow
Cover Patterns, Water Resour. Res., 27, 3171–3179,
https://doi.org/10.1029/91WR02250, 1991.
Boeckli, L., Brenning, A., Gruber, S., and Noetzli, J.: Permafrost distribution in the European Alps: calculation and evaluation of an index map and summary statistics, The Cryosphere, 6, 807–820, https://doi.org/10.5194/tc-6-807-2012, 2012.
Boone, A. and Etchevers, P.: An Intercomparison of Three Snow Schemes of
Varying Complexity Coupled to the Same Land Surface Model: Local-Scale
Evaluation at an Alpine Site, J. Hydrometeorol., 2, 374–394,
https://doi.org/10.1175/1525-7541(2001)002<0374:AIOTSS>2.0.CO;2, 2001.
Bussy, F. and Von Raumer, J.: U–Pb geochronology of Palaeozoic magmatic
events in the Mont-Blanc Crystalline Massif, Western Alps, Schweiz. Mineral.
Petrog., 74, 514–515, 1994.
D'Amato, J., Hantz, D., Guerin, A., Jaboyedoff, M., Baillet, L., and Mariscal, A.: Influence of meteorological factors on rockfall occurrence in a middle mountain limestone cliff, Nat. Hazards Earth Syst. Sci., 16, 719–735, https://doi.org/10.5194/nhess-16-719-2016, 2016.
Draebing, D. and Krautblatter, M.: The Efficacy of Frost Weathering
Processes in Alpine Rockwalls, Geophys. Res. Lett., 46, 6516–6524,
https://doi.org/10.1029/2019GL081981, 2019.
Durand, Y., Brun, E., Merindol, L., Guyomarc'h, G., Lesaffre, B., and
Martin, E.: A meteorological estimation of relevant parameters for snow
models, Ann. Glaciol., 18, 65–71,
https://doi.org/10.3189/S0260305500011277, 1993.
Dwivedi, R. D., Singh, P. K., Singh, T. N., and Singh, D. P.: Compressive
strength and tensile strength of rocks at sub-zero temperature, Indian J.
Eng. Mater. Sci., 5, 43–48, 1998.
Eppes, M. C. and Keanini, R.: Mechanical weathering and rock erosion by
climate-dependent subcritical cracking, Rev. Geophys., 55, 470–508,
https://doi.org/10.1002/2017RG000557, 2017.
Essel, B., McDonald, J., Bolger, M., and Cahalane, C.: INITIAL STUDY ASSESSING THE SUITABILITY OF DRONES WITH LOW-COST GNSS AND IMU FOR MAPPING OVER FEATURELESS TERRAIN USING DIRECT GEOREFERENCING, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B2-2022, 37–44, https://doi.org/10.5194/isprs-archives-XLIII-B2-2022-37-2022, 2022.
Evans, I. S.: An integrated system of terrain analysis and slope mapping, Z.
Geomorphol., 36, 274–295, 1980.
Fierz, C., Armstrong, R. L., Durand, Y., Etchevers, P., Greene, E., McClung, D. M., Nishimura, K., Satyawali, P. K., and Sokratov, S. A.: The International Classification for Seasonal Snow on the Ground. IHP-VII Technical Documents in Hydrology No. 83, IACS Contribution No. 1, UNESCO-IHP, Paris,
https://unesdoc.unesco.org/ark:/48223/pf0000186462 (last access: 24 August 2023), 2009.
Fischer, L., Amann, F., Moore, J. R., and Huggel, C.: Assessment of
periglacial slope stability for the 1988 Tschierva rock avalanche (Piz
Morteratsch, Switzerland), Eng. Geol., 116, 32–43,
https://doi.org/10.1016/j.enggeo.2010.07.005, 2010.
French, H. M.: The Periglacial Environment, Fourth edition, ISBN 9781119132790,
https://doi.org/10.1002/9781119132820, 2017.
Gardent, M., Rabatel, A., Dedieu, J.-P., and Deline, P.: Multitemporal
glacier inventory of the French Alps from the late 1960s to the late 2000s,
Global Planet. Change, 120, 24–37,
https://doi.org/10.1016/j.gloplacha.2014.05.004, 2014.
Gruber, S. and Haeberli, W.: Permafrost in steep bedrock slopes and its
temperatures-related destabilization following climate change, J. Geophys.
Res.-Earth, 112, F02S18, https://doi.org/10.1029/2006JF000547, 2007.
Gruber, S., Hoelzle, M., and Haeberli, W.: Rock-wall temperatures in the
Alps: Modelling their topographic distribution and regional differences,
Permafrost Periglac., 15, 299–307, https://doi.org/10.1002/ppp.501,
2004.
Gruber Schmid, U. and Sardemann, S.: High-frequency avalanches: release area
characteristics and run-out distances, Cold Reg. Sci. Technol., 37,
439–451, https://doi.org/10.1016/S0165-232X(03)00083-1, 2003.
Haberkorn, A., Phillips, M., Kenner, R., Rhyner, H., Bavay, M., Galos, S.
P., and Hoelzle, M.: Thermal Regime of Rock and its Relation to Snow Cover
in Steep Alpine Rock Walls: Gemsstock, Central Swiss Alps, Geogr. Ann. Ser.
Phys. Geogr., 97, 579–597, https://doi.org/10.1111/geoa.12101, 2015.
Haberkorn, A., Wever, N., Hoelzle, M., Phillips, M., Kenner, R., Bavay, M., and Lehning, M.: Distributed snow and rock temperature modelling in steep rock walls using Alpine3D, The Cryosphere, 11, 585–607, https://doi.org/10.5194/tc-11-585-2017, 2017.
Haeberli, W. and Gruber, S.: Global Warming and Mountain Permafrost, in:
Permafrost Soils, vol. 16, edited by: Margesin, R., Springer Berlin
Heidelberg, Berlin, Heidelberg, 205–218,
https://doi.org/10.1007/978-3-540-69371-0_14, 2009.
Haeberli, W., Noetzli, J., Arenson, L., Delaloye, R., Gärtner-Roer, I.,
Gruber, S., Isaksen, K., Kneisel, C., Krautblatter, M., and Phillips, M.:
Mountain permafrost: development and challenges of a young research field,
J. Glaciol., 56, 1043–1058, https://doi.org/10.3189/002214311796406121,
2010.
Hasler, A., Gruber, S., Font, M., and Dubois, A.: Advective heat transport
in frozen rock clefts: Conceptual model, laboratory experiments and
numerical simulation, Permafrost Periglac., 22, 378–389,
https://doi.org/10.1002/ppp.737, 2011.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A.,
Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D.,
Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P.,
Biavati, G., Bidlot, J., Bonavita, M., Chiara, G., Dahlgren, P., Dee, D.,
Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer,
A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková,
M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., Rosnay, P.,
Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.: The ERA5 global
reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049,
https://doi.org/10.1002/qj.3803, 2020.
Hoelzle, M., Mittaz, C., Etzelmüller, B., and Haeberli, W.: Surface
energy fluxes and distribution models of permafrost in European mountain
areas: an overview of current developments: Surface Energy Fluxes, Permafrost
Periglac., 12, 53–68, https://doi.org/10.1002/ppp.385, 2001.
Hood, J. L. and Hayashi, M.: Assessing the application of a laser rangefinder for determining snow depth in inaccessible alpine terrain, Hydrol. Earth Syst. Sci., 14, 901–910, https://doi.org/10.5194/hess-14-901-2010, 2010.
Huggel, C., Allen, S., Deline, P., Fischer, L., Noetzli, J., and Ravanel,
L.: Ice thawing, mountains falling-are alpine rock slope failures
increasing, Geol. Today, 28, 98–104,
https://doi.org/10.1111/j.1365-2451.2012.00836.x, 2012.
Kiraly, L.: Anisotropie et hétérogénéité de la
perméabilité dans les calcaires fissurés (Anisotropy and
heterogeneity of permeability in fractured limestones), Eclogae Geol.
Helv., 62, 613–619, 1969.
Kiraly, L.: Groundwater flow in fractured rocks: models and reality: with 15
figures (with author annotations), in: 14. Mintrop-Seminar über
Interpretationsstrategien in Exploration und Produktion, 1–21, https://libra.unine.ch/entities/publication/a108a48e-b366-478d-a901-d45485c95fa7/details (last access: 15 November 2021), 1994.
Krautblatter, M., Funk, D., and Günzel, F. K.: Why permafrost rocks
become unstable: A rock-ice-mechanical model in time and space, Earth Surf.
Proc. Land., 38, 876–887, https://doi.org/10.1002/esp.3374, 2013.
Legay, A., Magnin, F., and Ravanel, L.: Rock temperature prior to failure:
Analysis of 209 rockfall events in the Mont Blanc massif (Western European
Alps), Permafrost Periglac., 32, 520–536,
https://doi.org/10.1002/ppp.2110, 2021.
Lehning, M., Grünewald, T., and Schirmer, M.: Mountain snow distribution governed by an altitudinal gradient and terrain roughness, Geophys. Res. Lett., 38, L19504,
https://doi.org/10.1029/2011GL048927, 2011.
Leloup, P. H., Arnaud, N., Sobel, E. R., and Lacassin, R.: Alpine thermal and structural evolution of the highest external crystalline massif: The Mont Blanc, Tectonics, 24, TC4002,
https://doi.org/10.1029/2004TC001676, 2005.
Li, N., Zhang, P., Chen, Y., and Swoboda, G.: Fatigue properties of cracked,
saturated and frozen sandstone samples under cyclic loading, Int. J. Rock
Mech. Min., 40, 145–150,
https://doi.org/10.1016/S1365-1609(02)00111-9, 2003.
López-Moreno, J. I., Soubeyroux, J. M., Gascoin, S., Alonso-Gonzalez,
E., Durán-Gómez, N., Lafaysse, M., Vernay, M., Carmagnola, C., and
Morin, S.: Long-term trends (1958–2017) in snow cover duration and depth in
the Pyrenees, Int. J. Climatol., 40, 6122–6136,
https://doi.org/10.1002/joc.6571, 2020.
MacDonald, M. K., Pomeroy, J. W., and Pietroniro, A.: On the importance of sublimation to an alpine snow mass balance in the Canadian Rocky Mountains, Hydrol. Earth Syst. Sci., 14, 1401–1415, https://doi.org/10.5194/hess-14-1401-2010, 2010.
Magnin, F. and Josnin, J.-Y.: Water flows in rock wall permafrost: A numerical approach coupling hydrological and thermal processes, J. Geophys. Res.-Earth, 126, e2021JF006394, https://doi.org/10.1029/2021JF006394, 2021.
Magnin, F., Brenning, A., Bodin, X., Deline, P., and Ravanel, L.:
Modélisation statistique de la distribution du permafrost de paroi:
application au massif du Mont Blanc, Géomorphologie Relief Process.
Environ., 21, 145–162, https://doi.org/10.4000/geomorphologie.10965, 2015a.
Magnin, F., Deline, P., Ravanel, L., Noetzli, J., and Pogliotti, P.: Thermal
characteristics of permafrost in the steep alpine rock walls of the Aiguille
du Midi (Mont Blanc Massif, 3842 m a.s.l), Cryosphere, 9, 109–121,
https://doi.org/10.5194/tc-9-109-2015, 2015b.
Magnin, F., Westermann, S., Pogliotti, P., Ravanel, L., Deline, P., and
Malet, E.: Snow control on active layer thickness in steep alpine rock walls
(Aiguille du Midi, 3842 m a.s.l., Mont Blanc massif), Catena, 149, 648–662,
https://doi.org/10.1016/j.catena.2016.06.006, 2017.
Mamot, P., Weber, S., Schröder, T., and Krautblatter, M.: A temperature- and stress-controlled failure criterion for ice-filled permafrost rock joints, The Cryosphere, 12, 3333–3353, https://doi.org/10.5194/tc-12-3333-2018, 2018.
Mamot, P., Weber, S., Lanz, M., and Krautblatter, M.: Brief communication: The influence of mica-rich rocks on the shear strength of ice-filled discontinuities, The Cryosphere, 14, 1849–1855, https://doi.org/10.5194/tc-14-1849-2020, 2020.
Maréchal, J. C., Perrochet, P., and Tacher, L.: Long-term simulations of
thermal and hydraulic characteristics in a mountain massif: The Mont Blanc
case study, French and Italian Alps, Hydrogeol. J., 7, 341–354,
https://doi.org/10.1007/s100400050207, 1999.
Marsh, P.: Water Flow through Snow and Firn, in: Encyclopedia of
Hydrological Sciences, edited by: Anderson, M. G. and McDonnell, J. J., John
Wiley & Sons, Ltd, Chichester, UK, hsa167,
https://doi.org/10.1002/0470848944.hsa167, 2005.
Matsuoka, N.: Frost weathering and rockwall erosion in the southeastern
Swiss Alps: Long-term (1994–2006) observations, Geomorphology, 99, 353–368,
https://doi.org/10.1016/j.geomorph.2007.11.013, 2008.
Matsuoka, N.: A multi-method monitoring of timing, magnitude and origin of
rockfall activity in the Japanese Alps, Geomorphology, 336, 65–76,
https://doi.org/10.1016/j.geomorph.2019.03.023, 2019.
Mellor, M.: Mechanical properties of rocks at low temperatures, in: 2nd
International Conference on Permafrost, Yakutsk, International Permafrost
Association, 334–344,
https://books.google.fr/books?hl=iw&lr=&id=M4SvF9Qax7EC&oi=fnd&pg=PA334&dq=mellor+Mechanical+properties+of+rocks+at+low+temperatures&ots=gtCsjQAGMO&sig=_ZPYqA9IlR2y14vOg9gm0BL6X2E&redir_esc=y#v=onepage&q=mellor Mechanical properties of rocks at low temperatures&f=false
(last access: 7 March 2023), 1973.
Mineo, S. and Pappalardo, G.: Rock Emissivity Measurement for Infrared
Thermography Engineering Geological Applications, Appl. Sci., 11, 3773,
https://doi.org/10.3390/app11093773, 2021.
Mott, R., Schirmer, M., Bavay, M., Grünewald, T., and Lehning, M.: Understanding snow-transport processes shaping the mountain snow-cover, The Cryosphere, 4, 545–559, https://doi.org/10.5194/tc-4-545-2010, 2010.
Mourey, J., Lacroix, P., Duvillard, P.-A., Marsy, G., Marcer, M., Malet, E., and Ravanel, L.: Multi-method monitoring of rockfall activity along the classic route up Mont Blanc (4809 m a.s.l.) to encourage adaptation by mountaineers, Nat. Hazards Earth Syst. Sci., 22, 445–460, https://doi.org/10.5194/nhess-22-445-2022, 2022.
Myhra, K. S., Westermann, S., and Etzelmüller, B.: Modelled Distribution
and Temporal Evolution of Permafrost in Steep Rock Walls Along a Latitudinal
Transect in Norway by CryoGrid 2D, Permafrost Periglac., 28,
172–182, https://doi.org/10.1002/ppp.1884, 2017.
Pepin, N. C., Bradley, R. S., Diaz, H. F., Baraer, M., Caceres, E. B.,
Forsythe, N., Fowler, H., Greenwood, G., Hashmi, M. Z., Liu, X. D., Miller,
J. R., Ning, L., Ohmura, A., Palazzi, E., Rangwala, I., Schöner, W.,
Severskiy, I., Shahgedanova, M., Wang, M. B., Williamson, S. N., and Yang,
D. Q.: Elevation-dependent warming in mountain regions of the world, Nat.
Clim. Change, 5, 424–430, https://doi.org/10.1038/nclimate2563, 2015.
Pepin, N. C., Arnone, E., Gobiet, A., Haslinger, K., Kotlarski, S.,
Notarnicola, C., Palazzi, E., Seibert, P., Serafin, S., Schöner, W.,
Terzago, S., Thornton, J. M., Vuille, M., and Adler, C.: Climate Changes and
Their Elevational Patterns in the Mountains of the World, Rev. Geophys., 60, e2020RG000730,
https://doi.org/10.1029/2020RG000730, 2022.
Phillips, M., Haberkorn, A., Draebing, D., Krautblatter, M., Rhyner, H., and
Kenner, R.: Seasonally intermittent water flow through deep fractures in an
Alpine Rock Ridge: Gemsstock, Central Swiss Alps, Cold Reg. Sci. Technol.,
125, 117–127, https://doi.org/10.1016/j.coldregions.2016.02.010, 2016.
Phillips, M., Haberkorn, A., and Rhyner, H.: Snowpack characteristics on
steep frozen rock slopes, Cold Reg. Sci. Technol., 141, 54–65,
https://doi.org/10.1016/j.coldregions.2017.05.010, 2017.
Rasmussen, R., Baker, B., Kochendorfer, J., Meyers, T., Landolt, S.,
Fischer, A. P., Black, J., Thériault, J. M., Kucera, P., Gochis, D.,
Smith, C., Nitu, R., Hall, M., Ikeda, K., and Gutmann, E.: How Well Are We
Measuring Snow: The NOAA/FAA/NCAR Winter Precipitation Test Bed, B. Am.
Meteorol. Soc., 93, 811–829, https://doi.org/10.1175/BAMS-D-11-00052.1,
2012.
Ravanel, L. and Deline, P.: Climate influence on rockfalls in high-alpine
steep rockwalls: The north side of the aiguilles de chamonix (mont blanc
massif) since the end of the “Little Ice Age”, Holocene, 21, 357–365,
https://doi.org/10.1177/0959683610374887, 2011.
Ravanel, L. and Deline, P.: A network of observers in the Mont-Blanc massif
to study rockfall from high Alpine rockwalls, Geogr. Fis. E Din. Quat.,
151–158, https://doi.org/10.4461/GFDQ.2013.36.12, 2013.
Ravanel, L. and Deline, P.: Rockfall Hazard in the Mont Blanc Massif
Increased by the Current Atmospheric Warming, in: Engineering Geology for
Society and Territory – Volume 1, edited by: Lollino, G., Manconi, A.,
Clague, J., Shan, W., and Chiarle, M., Springer International Publishing,
Cham, 425–428, https://doi.org/10.1007/978-3-319-09300-0_81,
2015.
Ravanel, L., Magnin, F., and Deline, P.: Impacts of the 2003 and 2015 summer
heatwaves on permafrost-affected rock-walls in the Mont Blanc massif, Sci.
Total Environ., 609, 132–143,
https://doi.org/10.1016/j.scitotenv.2017.07.055, 2017.
Richards, L. A.: Capillary conduction of liquids through porous mediums,
Physics, 1, 318–333, https://doi.org/10.1063/1.1745010, 1931.
Rossi, M., Rolland, Y., Vidal, O., and Cox, S. F.: Geochemical variations
and element transfer during shear-zone development and related episyenites
at middle crust depths: insights from the Mont Blanc granite (French –
Italian Alps), Geol. Soc. Lond. Spec. Publ., 245, 373–396,
https://doi.org/10.1144/GSL.SP.2005.245.01.18, 2005.
Schmidt, J. U., Etzelmüller, B., Schuler, T. V., Magnin, F., Boike, J., Langer, M., and Westermann, S.: Surface temperatures and their influence on the permafrost thermal regime in high-Arctic rock walls on Svalbard, The Cryosphere, 15, 2491–2509, https://doi.org/10.5194/tc-15-2491-2021, 2021.
Sokratov, S. A. and Sato, A.: The effect of wind on the snow cover, Ann.
Glaciol., 32, 116–120, https://doi.org/10.3189/172756401781819436, 2001.
Sommer, C. G., Lehning, M., and Mott, R.: Snow in a Very Steep Rock Face:
Accumulation and Redistribution During and After a Snowfall Event, Front.
Earth Sci., 3, 1–13, https://doi.org/10.3389/feart.2015.00073, 2015.
Sommerfeld, R. A. and Rocchio, J. E.: Permeability measurements on new and
equitemperature snow, Water Resour. Res., 29, 2485–2490,
https://doi.org/10.1029/93WR01071, 1993.
Strasser, U., Bernhardt, M., Weber, M., Liston, G. E., and Mauser, W.: Is snow sublimation important in the alpine water balance?, The Cryosphere, 2, 53–66, https://doi.org/10.5194/tc-2-53-2008, 2008.
Tonkin, T. N., Midgley, N. G., Cook, S. J., and Graham, D. J.: Ice-cored
moraine degradation mapped and quantified using an unmanned aerial vehicle:
A case study from a polythermal glacier in Svalbard, Geomorphology, 258,
1–10, https://doi.org/10.1016/j.geomorph.2015.12.019, 2016.
Vernay, M., Lafaysse, M., Monteiro, D., Hagenmuller, P., Nheili, R., Samacoïts, R., Verfaillie, D., and Morin, S.: The S2M meteorological and snow cover reanalysis over the French mountainous areas: description and evaluation (1958–2021), Earth Syst. Sci. Data, 14, 1707–1733, https://doi.org/10.5194/essd-14-1707-2022, 2022 (data available at: https://www.aeris-data.fr/landing-page/?uuid=865730e8-edeb-4c6b-ae58-80f95166509b, last access: 19 May 2022).
Vionnet, V., Brun, E., Morin, S., Boone, A., Faroux, S., Le Moigne, P., Martin, E., and Willemet, J.-M.: The detailed snowpack scheme Crocus and its implementation in SURFEX v7.2, Geosci. Model Dev., 5, 773–791, https://doi.org/10.5194/gmd-5-773-2012, 2012.
Vivero, S. and Lambiel, C.: Monitoring the crisis of a rock glacier with repeated UAV surveys, Geogr. Helv., 74, 59–69, https://doi.org/10.5194/gh-74-59-2019, 2019.
Westermann, S., Ingeman-Nielsen, T., Scheer, J., Aalstad, K., Aga, J., Chaudhary, N., Etzelmüller, B., Filhol, S., Kääb, A., Renette, C., Schmidt, L. S., Schuler, T. V., Zweigel, R. B., Martin, L., Morard, S., Ben-Asher, M., Angelopoulos, M., Boike, J., Groenke, B., Miesner, F., Nitzbon, J., Overduin, P., Stuenzi, S. M., and Langer, M.: The CryoGrid community model (version 1.0) – a multi-physics toolbox for climate-driven simulations in the terrestrial cryosphere, Geosci. Model Dev., 16, 2607–2647, https://doi.org/10.5194/gmd-16-2607-2023, 2023.
Winstral, A., Elder, K., and Davis, R. E.: Spatial Snow Modeling of
Wind-Redistributed Snow Using Terrain-Based Parameters, J. Hydrometeorol.,
3, 524–538, https://doi.org/10.1175/1525-7541(2002)003<0524:SSMOWR>2.0.CO;2, 2002.
Wirz, V., Schirmer, M., Gruber, S., and Lehning, M.: Spatio-temporal
measurements and analysis of snow depth in a rock face, The Cryosphere, 5,
893–905, https://doi.org/10.5194/tc-5-893-2011, 2011.
Woo, M. and Heron, R.: Occurrence of Ice Layers at the Base of High Arctic
Snowpacks, Arct. Alp. Res., 13, 225, https://doi.org/10.2307/1551198, 1981.
Woo, M., Heron, R., and Marsh, P.: Basal Ice in High Arctic Snowpacks, Arct.
Alp. Res., 14, 251, https://doi.org/10.2307/1551157, 1982.
Zevenbergen, L. W. and Thorne, C. R.: Quantitative analysis of land surface
topography, Earth Surf. Proc. Land., 12, 47–56,
https://doi.org/10.1002/esp.3290120107, 1987.
Zhang, H., Aldana-Jague, E., Clapuyt, F., Wilken, F., Vanacker, V., and Van Oost, K.: Evaluating the potential of post-processing kinematic (PPK) georeferencing for UAV-based structure- from-motion (SfM) photogrammetry and surface change detection, Earth Surf. Dynam., 7, 807–827, https://doi.org/10.5194/esurf-7-807-2019, 2019.
Short summary
Quantitative knowledge of water availability on high mountain rock slopes is very limited. We use a numerical model and field measurements to estimate the water balance at a steep rock wall site. We show that snowmelt is the main source of water at elevations >3600 m and that snowpack hydrology and sublimation are key factors. The new information presented here can be used to improve the understanding of thermal, hydrogeological, and mechanical processes on steep mountain rock slopes.
Quantitative knowledge of water availability on high mountain rock slopes is very limited. We...
