 Subjects -> METEOROLOGY (Total: 106 journals)
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- Brief communication: The Glacier Loss Day as indicator for extreme glacier
melt in 2022
Abstract: Brief communication: The Glacier Loss Day as indicator for extreme glacier melt in 2022
Annelies Voordendag, Rainer Prinz, Lilian Schuster, and Georg Kaser
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-49,2023
Preprint under review for TC (discussion: open, 0 comments)
The Glacier Loss Day (GLD) is the day when all mass gained from the accumulation period is lost and the glacier loses mass irrecoverably for the rest of the mass balance year. In 2022, this GLD was already reached at 24 June at Hintereisferner (Austria) and led to a record mass loss. We introduce the GLD as a gross yet expressive indicator of the glacier’s imbalance with the persistently warming climate.
PubDate: Thu, 23 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-2023-492023
- Analysis of microseismicity in sea ice with deep learning and Bayesian
inference: application to high-resolution thickness monitoring
Abstract: Analysis of microseismicity in sea ice with deep learning and Bayesian inference: application to high-resolution thickness monitoring
Ludovic Moreau, Léonard Seydoux, Jérôme Weiss, and Michel Campillo
The Cryosphere, 17, 1327–1341, https://doi.org/10.5194/tc-17-1327-2023, 2023
In the perspective of an upcoming seasonally ice-free Arctic, understanding the dynamics of sea ice in the changing climate is a major challenge in oceanography and climatology. It is therefore essential to monitor sea ice properties with fine temporal and spatial resolution. In this paper, we show that icequakes recorded on sea ice can be processed with artificial intelligence to produce accurate maps of sea ice thickness with high temporal and spatial resolutions.
PubDate: Wed, 22 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-17-1327-2023 2023
- Foehn Winds at Pine Island Glacier and their role in Ice Changes
Abstract: Foehn Winds at Pine Island Glacier and their role in Ice Changes
Diana Francis, Ricardo Fonseca, Kyle S. Mattingly, Stef Lhermitte, and Catherine Walker
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-46,2023
Preprint under review for TC (discussion: open, 0 comments)
Role of Foehn Winds in ice and snow conditions at the Pine Island Glacier – Antarctica
PubDate: Wed, 22 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-2023-462023
- Snow sensitivity to temperature and precipitation change during compound
cold–hot and wet–dry seasons in the Pyrenees
Abstract: Snow sensitivity to temperature and precipitation change during compound cold–hot and wet–dry seasons in the Pyrenees
Josep Bonsoms, Juan Ignacio López-Moreno, and Esteban Alonso-González
The Cryosphere, 17, 1307–1326, https://doi.org/10.5194/tc-17-1307-2023, 2023
This work analyzes the snow response to temperature and precipitation in the Pyrenees. During warm and wet seasons, seasonal snow depth is expected to be reduced by −37 %, −34 %, and −27 % per degree Celsius at low-, mid-, and high-elevation areas, respectively. The largest snow reductions are anticipated at low elevations of the eastern Pyrenees. Results anticipate important impacts on the nearby ecological and socioeconomic systems.
PubDate: Tue, 21 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-17-1307-2023 2023
- Brief communication: Glacier mapping and change estimation using very
high-resolution declassified Hexagon KH-9 panoramic stereo imagery
(1971–1984)
Abstract: Brief communication: Glacier mapping and change estimation using very high-resolution declassified Hexagon KH-9 panoramic stereo imagery (1971–1984)
Sajid Ghuffar, Owen King, Grégoire Guillet, Ewelina Rupnik, and Tobias Bolch
The Cryosphere, 17, 1299–1306, https://doi.org/10.5194/tc-17-1299-2023, 2023
The panoramic cameras (PCs) on board Hexagon KH-9 satellite missions from 1971–1984 captured very high-resolution stereo imagery with up to 60 cm spatial resolution. This study explores the potential of this imagery for glacier mapping and change estimation. The high resolution of KH-9PC leads to higher-quality DEMs which better resolve the accumulation region of glaciers in comparison to the KH-9 mapping camera, and KH-9PC imagery can be useful in several Earth observation applications.
PubDate: Tue, 21 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-17-1299-2023 2023
- The Ability of Hydrologic-Land Surface Models to Concurrently Simulate
Permafrost and Hydrology
Abstract: The Ability of Hydrologic-Land Surface Models to Concurrently Simulate Permafrost and Hydrology
Mohamed S. Abdelhamed, Mohamed E. Elshamy, Saman Razavi, and Howard S. Wheater
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-20,2023
Preprint under review for TC (discussion: open, 0 comments)
Prior to any climate change assessment, it is necessary to assess the ability of available models to reliably reproduce observed permafrost and hydrology. Following a progressive approach, various model set-ups were developed and evaluated against different data sources. The study shows that different model set-ups favour different sources of data and it is challenging to configure a model faithful to all data sources, which are at times inconsistent with each other.
PubDate: Tue, 21 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-2023-202023
- A low-cost and open-source approach for supraglacial debris thickness
mapping using UAV-based infrared thermography
Abstract: A low-cost and open-source approach for supraglacial debris thickness mapping using UAV-based infrared thermography
Jérôme Messmer and Alexander R. Groos
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-41,2023
Preprint under review for TC (discussion: open, 0 comments)
The lower part of mountain glaciers is often covered with debris. Knowing the thickness of the debris is important as it influences the melting and future evolution of the affected glaciers. We have developed an open-source approach to map variations in debris thickness on glaciers using a low-cost drone equipped with a thermal infrared camera. The resulting high-resolution maps of debris surface temperature and thickness enable more accurate monitoring and modelling of debris-covered glaciers.
PubDate: Mon, 20 Mar 2023 03:35:09 +010
DOI: 10.5194/tc-2023-412023
- Sea ice classification of TerraSAR-X ScanSAR images for the MOSAiC
expedition incorporating per-class incidence angle dependency of image
texture
Abstract: Sea ice classification of TerraSAR-X ScanSAR images for the MOSAiC expedition incorporating per-class incidence angle dependency of image texture
Wenkai Guo, Polona Itkin, Suman Singha, Anthony P. Doulgeris, Malin Johansson, and Gunnar Spreen
The Cryosphere, 17, 1279–1297, https://doi.org/10.5194/tc-17-1279-2023, 2023
Sea ice maps are produced to cover the MOSAiC Arctic expedition (2019–2020) and divide sea ice into scientifically meaningful classes. We use a high-resolution X-band synthetic aperture radar dataset and show how image brightness and texture systematically vary across the images. We use an algorithm that reliably corrects this effect and achieve good results, as evaluated by comparisons to ground observations and other studies. The sea ice maps are useful as a basis for future MOSAiC studies.
PubDate: Thu, 16 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-17-1279-2023 2023
- Mapping age and basal conditions of ice in the Dome Fuji region,
Antarctica, by combining radar internal layer stratigraphy and flow
modeling
Abstract: Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling
Zhuo Wang, Ailsa Chung, Daniel Steinhage, Frédéric Parrenin, Johannes Freitag, and Olaf Eisen
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-35,2023
Preprint under review for TC (discussion: open, 0 comments)
We combine the observed internal layer stratigraphy with 1D ice flow model in the Dome Fuji (DF) region. From the modelling results we map the age of ice, the basal thermal condition and accumulation rate. We identify four potential candidates for old ice based on age and age density of ice. Map of basal thermal condition implies melting prevails over stagnant ice here. We interpolate the age of basal ice of 1345.8 ka, melt rate of 0.11 mm/a and accumulation rate of 0.022 m/a at DF.
PubDate: Thu, 16 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-2023-352023
- Holocene history of the 79° N ice shelf reconstructed from epishelf
lake and uplifted glaciomarine sediments
Abstract: Holocene history of the 79° N ice shelf reconstructed from epishelf lake and uplifted glaciomarine sediments
James A. Smith, Louise Callard, Michael J. Bentley, Stewart S. R. Jamieson, Maria Luisa Sánchez-Montes, Timothy P. Lane, Jeremy M. Lloyd, Erin L. McClymont, Christopher M. Darvill, Brice R. Rea, Colm O'Cofaigh, Pauline Gulliver, Werner Ehrmann, Richard S. Jones, and David H. Roberts
The Cryosphere, 17, 1247–1270, https://doi.org/10.5194/tc-17-1247-2023, 2023
The Greenland Ice Sheet is melting at an accelerating rate. To understand the significance of these changes we reconstruct the history of one of its fringing ice shelves, known as 79° N ice shelf. We show that the ice shelf disappeared 8500 years ago, following a period of enhanced warming. An important implication of our study is that 79° N ice shelf is susceptible to collapse when atmospheric and ocean temperatures are ~2°C warmer than present, which could occur by the middle of this century.
PubDate: Wed, 15 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-17-1247-2023 2023
- Brief communication: Monitoring active layer dynamics using a lightweight
nimble ground-penetrating radar system – a laboratory analogue test case
Abstract: Brief communication: Monitoring active layer dynamics using a lightweight nimble ground-penetrating radar system – a laboratory analogue test case
Emmanuel Léger, Albane Saintenoy, Mohammed Serhir, François Costard, and Christophe Grenier
The Cryosphere, 17, 1271–1277, https://doi.org/10.5194/tc-17-1271-2023, 2023
This study presents the laboratory test of a low-cost ground-penetrating radar (GPR) system within a laboratory experiment of active layer freezing and thawing monitoring. The system is an in-house-built low-power monostatic GPR antenna coupled with a reflectometer piloted by a single-board computer and was tested prior to field deployment.
PubDate: Wed, 15 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-17-1271-2023 2023
- Surface mass balance modelling of the Juneau Icefield highlights the
potential for rapid ice loss by the mid-21st century
Abstract: Surface mass balance modelling of the Juneau Icefield highlights the potential for rapid ice loss by the mid-21st century
Ryan N. Ing, Jeremy C. Ely, Julie M. Jones, and Bethan J. Davies
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-33,2023
Preprint under review for TC (discussion: open, 1 comment)
Many of the glaciers in Alaska are losing ice, contributing to sea-level rise. Here, we study the inputs and outputs for the Juneau Icefield. We first model the historical changes to snowfall and melt, constraining our model with observations. We then project future changes to the icefield, which show that icefield-wide loss of ice is likely. Losses are driven by rising temperatures, and less snowfall. The exposure of ice, and the break-up of glaciers due to thinning may accelerate ice loss.
PubDate: Wed, 15 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-2023-332023
- Basal conditions of Denman Glacier from glacier hydrology and ice dynamics
modeling
Abstract: Basal conditions of Denman Glacier from glacier hydrology and ice dynamics modeling
Koi McArthur, Felicity S. McCormack, and Christine F. Dow
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-28,2023
Preprint under review for TC (discussion: open, 0 comments)
Using subglacial hydrology model outputs for Denman Glacier, East Antarctica we investigated the effects of various friction laws and effective pressure inputs on ice dynamics modeling over the same glacier. The Schoof friction law outperformed the Budd friction law and effective pressure outputs from the hydrology model outperformed a typically prescribed effective pressure. We propose an empirical prescription of effective pressure to be used in the absence of hydrology model outputs.
PubDate: Wed, 15 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-2023-282023
- Topographic and vegetation controls of the spatial distribution of snow
depth in agro-forested environments by UAV lidar
Abstract: Topographic and vegetation controls of the spatial distribution of snow depth in agro-forested environments by UAV lidar
Vasana Dharmadasa, Christophe Kinnard, and Michel Baraër
The Cryosphere, 17, 1225–1246, https://doi.org/10.5194/tc-17-1225-2023, 2023
This study highlights the successful usage of UAV lidar to monitor small-scale snow depth distribution. Our results show that underlying topography and wind redistribution of snow along forest edges govern the snow depth variability at agro-forested sites, while forest structure variability dominates snow depth variability in the coniferous environment. This emphasizes the importance of including and better representing these processes in physically based models for accurate snowpack estimates.
PubDate: Tue, 14 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-17-1225-2023 2023
- Brief communication: Comparison of in-situ ephemeral snow depth
measurements over a mixed-use temperate forest landscape
Abstract: Brief communication: Comparison of in-situ ephemeral snow depth measurements over a mixed-use temperate forest landscape
Holly Proulx, Jennifer M. Jacobs, Elizabeth A. Burakowski, Eunsang Cho, Adam G. Hunsaker, Franklin B. Sullivan, Michael Palace, and Cameron Wagner
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-36,2023
Preprint under review for TC (discussion: open, 0 comments)
This study compares snow depth measurements from two manual instruments in a field and forest. Snow depths measured using a magnaprobe were typically 1 to 3 cm deeper than those measured using a snow tube. These differences were greater in the forest than the field.
PubDate: Tue, 14 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-2023-362023
- The temperature-dependent shear strength of ice-filled joints in rock mass
considering the effect of joint roughness, opening and shear rates
Abstract: The temperature-dependent shear strength of ice-filled joints in rock mass considering the effect of joint roughness, opening and shear rates
Shibing Huang, Haowei Cai, Zekun Xin, and Gang Liu
The Cryosphere, 17, 1205–1223, https://doi.org/10.5194/tc-17-1205-2023, 2023
In this study, the warming degradation mechanism of ice-filled joints is revealed, and the effect of temperature, normal stress, shear rate and joint opening on the shear strength of rough ice-filled joints is investigated. The shear rupture modes include shear cracking of joint ice and debonding of the ice–rock interface, which is related to the above factors. The bonding strength of the ice–rock interface is larger than the shear strength of joint ice when the temperature is below −1 ℃.
PubDate: Mon, 13 Mar 2023 03:47:57 +010
DOI: 10.5194/tc-17-1205-2023 2023
- Exploring the role of snow metamorphism on the isotopic composition of the
surface snow at EastGRIP
Abstract: Exploring the role of snow metamorphism on the isotopic composition of the surface snow at EastGRIP
Romilly Harris Stuart, Anne-Katrine Faber, Sonja Wahl, Maria Hörhold, Sepp Kipfstuhl, Kristian Vasskog, Melanie Behrens, Alexandra M. Zuhr, and Hans Christian Steen-Larsen
The Cryosphere, 17, 1185–1204, https://doi.org/10.5194/tc-17-1185-2023, 2023
This empirical study uses continuous daily measurements from the Greenland Ice Sheet to document changes in surface snow properties. Consistent changes in snow isotopic composition are observed in the absence of deposition due to surface processes, indicating the isotopic signal of deposited precipitation is not always preserved. Our observations have potential implications for the interpretation of water isotopes in ice cores – historically assumed to reflect isotopic composition at deposition.
PubDate: Fri, 10 Mar 2023 00:36:30 +010
DOI: 10.5194/tc-17-1185-2023 2023
- High-resolution debris-cover mapping using UAV-derived thermal imagery:
limits and opportunities
Abstract: High-resolution debris-cover mapping using UAV-derived thermal imagery: limits and opportunities
Deniz Tobias Gök, Dirk Scherler, and Leif Stefan Anderson
The Cryosphere, 17, 1165–1184, https://doi.org/10.5194/tc-17-1165-2023, 2023
We performed high-resolution debris-thickness mapping using land surface temperature (LST) measured from an unpiloted aerial vehicle (UAV) at various times of the day. LSTs from UAVs require calibration that varies in time. We test two approaches to quantify supraglacial debris cover, and we find that the non-linearity of the relationship between LST and debris thickness increases with LST. Choosing the best model to predict debris thickness depends on the time of the day and the terrain aspect.
PubDate: Fri, 10 Mar 2023 00:36:30 +010
DOI: 10.5194/tc-17-1165-2023 2023
- Brief communication: Significant cold bias in ERA5 output for McMurdo
region, Antarctica
Abstract: Brief communication: Significant cold bias in ERA5 output for McMurdo region, Antarctica
Ricardo Garza-Giron and Slawek M. Tulaczyk
The Cryosphere Discuss., https//doi.org/10.5194/tc-2023-44,2023
Preprint under review for TC (discussion: open, 0 comments)
By analyzing temperature time series over more than 20 years, we have found a discrepancy between the 2-meter temperature values reported by the ERA5 reanalysis and the Automatic Weather Stations in the McMurdo Sound, Antarctica. The ERA5 reanalysis temperatures are systematically colder by ~5 °C.
PubDate: Fri, 10 Mar 2023 00:36:30 +010
DOI: 10.5194/tc-2023-442023
- Progress of the RADIX (Rapid Access Drilling and Ice eXtraction)
fast-access drilling system
Abstract: Progress of the RADIX (Rapid Access Drilling and Ice eXtraction) fast-access drilling system
Jakob Schwander, Thomas F. Stocker, Remo Walther, and Samuel Marending
The Cryosphere, 17, 1151–1164, https://doi.org/10.5194/tc-17-1151-2023, 2023
RADIX (Rapid Access Drilling and Ice eXtraction) is a fast-access ice-drilling system for prospecting future deep-drilling sites on glaciers and polar ice sheets. It consists of a 40 mm rapid firn drill, a 20 mm deep drill and a logger. The maximum depth range of RADIX is 3100 m by design. The nominal drilling speed is on the order of 40 m h-1. The 15 mm diameter logger provides data on the hole inclination and direction and measures temperature and dust in the ice surrounding the borehole.
PubDate: Thu, 09 Mar 2023 00:36:30 +010
DOI: 10.5194/tc-17-1151-2023 2023
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