Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania
Thermal conditions in seven rock glaciers (RGs) in the Retezat Mountains were examined using ground surface temperature, the bottom temperature of snow (BTS) and late‐summer water temperature at springs. Direct current resistivity profiles were used to detect ice‐rich layers and to estimate RG volum...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.1736 |
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ftrepec:oai:RePEc:wly:perpro:v:23:y:2012:i:2:p:127-137 2023-05-15T16:37:42+02:00 Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania Alfred Vespremeanu‐Stroe Petru Urdea Răzvan Popescu Mirela Vasile https://doi.org/10.1002/ppp.1736 unknown https://doi.org/10.1002/ppp.1736 article ftrepec https://doi.org/10.1002/ppp.1736 2020-12-04T13:31:25Z Thermal conditions in seven rock glaciers (RGs) in the Retezat Mountains were examined using ground surface temperature, the bottom temperature of snow (BTS) and late‐summer water temperature at springs. Direct current resistivity profiles were used to detect ice‐rich layers and to estimate RG volume. These parameters were supplemented by measurements of RG surface movement and morphological characteristics in order to develop a RG typology. RG activity is suggested based on BTS values and the mean annual surface temperature. The lower altitudinal limits for permafrost occurrence and the activity of RGs were found to be at 2000 m and 2100 m asl, respectively. The two highest and most active RGs are younger than 8 ka and developed following a cold climate event at 8.2 ka when a last isolated glacial episode occurred in their hosting cirques, while the remaining RGs date from 11.5–8.7 ka. Calculated rockwall denudation rates to produce these forms range from 0.8–1.1 mm/yr. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 23 2 127 137 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
Thermal conditions in seven rock glaciers (RGs) in the Retezat Mountains were examined using ground surface temperature, the bottom temperature of snow (BTS) and late‐summer water temperature at springs. Direct current resistivity profiles were used to detect ice‐rich layers and to estimate RG volume. These parameters were supplemented by measurements of RG surface movement and morphological characteristics in order to develop a RG typology. RG activity is suggested based on BTS values and the mean annual surface temperature. The lower altitudinal limits for permafrost occurrence and the activity of RGs were found to be at 2000 m and 2100 m asl, respectively. The two highest and most active RGs are younger than 8 ka and developed following a cold climate event at 8.2 ka when a last isolated glacial episode occurred in their hosting cirques, while the remaining RGs date from 11.5–8.7 ka. Calculated rockwall denudation rates to produce these forms range from 0.8–1.1 mm/yr. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Alfred Vespremeanu‐Stroe Petru Urdea Răzvan Popescu Mirela Vasile |
spellingShingle |
Alfred Vespremeanu‐Stroe Petru Urdea Răzvan Popescu Mirela Vasile Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
author_facet |
Alfred Vespremeanu‐Stroe Petru Urdea Răzvan Popescu Mirela Vasile |
author_sort |
Alfred Vespremeanu‐Stroe |
title |
Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
title_short |
Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
title_full |
Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
title_fullStr |
Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
title_full_unstemmed |
Rock Glacier Activity in the Retezat Mountains, Southern Carpathians, Romania |
title_sort |
rock glacier activity in the retezat mountains, southern carpathians, romania |
url |
https://doi.org/10.1002/ppp.1736 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://doi.org/10.1002/ppp.1736 |
op_doi |
https://doi.org/10.1002/ppp.1736 |
container_title |
Permafrost and Periglacial Processes |
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23 |
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2 |
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127 |
op_container_end_page |
137 |
_version_ |
1766028006040535040 |