Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system
The Younger Dryas (YD) interval, from approximately 12.9 to 11.5 kyr cal BP, a rapid reversion to glacial climate conditions at the Pleistocene-Holocene transition, has generally been attributed to the release of meltwater from the Laurentide Ice Sheet to the North Atlantic or Arctic oceans. The rea...
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ftawi:oai:epic.awi.de:22790 2024-09-15T17:58:14+00:00 Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system Meyer, Hanno Schirrmeister, Lutz Yoshikawa, K. Opel, Thomas Wetterich, Sebastian Hubberten, Hans-Wolfgang Brown, J. 2010 https://epic.awi.de/id/eprint/22790/ https://hdl.handle.net/10013/epic.35486 unknown Meyer, H. orcid:0000-0003-4129-4706 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Yoshikawa, K. , Opel, T. orcid:0000-0003-1315-8256 , Wetterich, S. orcid:0000-0001-9234-1192 , Hubberten, H. W. and Brown, J. (2010) Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system , Geophysical Research Abstracts; Vol. 12, EGU2010-5677; EGU General Assembly Vienna 2010. . hdl:10013/epic.35486 EPIC3Geophysical Research Abstracts; Vol. 12, EGU2010-5677; EGU General Assembly Vienna 2010., 2010 Conference notRev 2010 ftawi 2024-06-24T04:02:26Z The Younger Dryas (YD) interval, from approximately 12.9 to 11.5 kyr cal BP, a rapid reversion to glacial climate conditions at the Pleistocene-Holocene transition, has generally been attributed to the release of meltwater from the Laurentide Ice Sheet to the North Atlantic or Arctic oceans. The reaction of the North Pacific region to this shutdown of the thermohaline circulation in the North Atlantic during Younger Dryas is, however, little understood. The YD cold interval is of great interest for understanding rapid natural climate change, especially with regard to recent global warming scenarios. Various archives such as glacier ice, tree rings, lacustrine and marine sediments provide evidence for strong climate variability during the Late Glacial-Holocene transition. In our study, we investigated a relict, buried ice-wedge system within the continuous permafrost zone near Barrow, northern Alaska (71°18N, 156°40W). The Barrow ice-wedge system is buried under about three meters of Late Glacial/early Holocene ice-rich sediments. The ice wedges are accessible through a shaft which extends into an underground excavation, where a detailed description and sampling with an electrical chain saw were carried out. Permafrost is not only susceptible to recent climate change, it also may store evidence of these changes in ground ice, especially in ice wedges. Ice wedges can be assessed by stable water isotope methods similar to glacier ice climate reconstructions. Ice wedges are assumed to be indicative of winter climate conditions, because the seasonality of thermal contraction cracking and of the infill of frost cracks are generally related to winter and spring, respectively. In this paper, we present a winter climate record from ice wedges in permafrost of northern Alaska, a region, where paleoclimate records extending beyond the Late Glacial-Holocene transition are generally rather sparse, often restricted to lake sediments and rely mostly on summer indicators such as pollen. This reconstruction is the first ... Conference Object Barrow Climate change glacier Global warming Ice Ice Sheet North Atlantic permafrost wedge* Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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unknown |
description |
The Younger Dryas (YD) interval, from approximately 12.9 to 11.5 kyr cal BP, a rapid reversion to glacial climate conditions at the Pleistocene-Holocene transition, has generally been attributed to the release of meltwater from the Laurentide Ice Sheet to the North Atlantic or Arctic oceans. The reaction of the North Pacific region to this shutdown of the thermohaline circulation in the North Atlantic during Younger Dryas is, however, little understood. The YD cold interval is of great interest for understanding rapid natural climate change, especially with regard to recent global warming scenarios. Various archives such as glacier ice, tree rings, lacustrine and marine sediments provide evidence for strong climate variability during the Late Glacial-Holocene transition. In our study, we investigated a relict, buried ice-wedge system within the continuous permafrost zone near Barrow, northern Alaska (71°18N, 156°40W). The Barrow ice-wedge system is buried under about three meters of Late Glacial/early Holocene ice-rich sediments. The ice wedges are accessible through a shaft which extends into an underground excavation, where a detailed description and sampling with an electrical chain saw were carried out. Permafrost is not only susceptible to recent climate change, it also may store evidence of these changes in ground ice, especially in ice wedges. Ice wedges can be assessed by stable water isotope methods similar to glacier ice climate reconstructions. Ice wedges are assumed to be indicative of winter climate conditions, because the seasonality of thermal contraction cracking and of the infill of frost cracks are generally related to winter and spring, respectively. In this paper, we present a winter climate record from ice wedges in permafrost of northern Alaska, a region, where paleoclimate records extending beyond the Late Glacial-Holocene transition are generally rather sparse, often restricted to lake sediments and rely mostly on summer indicators such as pollen. This reconstruction is the first ... |
format |
Conference Object |
author |
Meyer, Hanno Schirrmeister, Lutz Yoshikawa, K. Opel, Thomas Wetterich, Sebastian Hubberten, Hans-Wolfgang Brown, J. |
spellingShingle |
Meyer, Hanno Schirrmeister, Lutz Yoshikawa, K. Opel, Thomas Wetterich, Sebastian Hubberten, Hans-Wolfgang Brown, J. Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
author_facet |
Meyer, Hanno Schirrmeister, Lutz Yoshikawa, K. Opel, Thomas Wetterich, Sebastian Hubberten, Hans-Wolfgang Brown, J. |
author_sort |
Meyer, Hanno |
title |
Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
title_short |
Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
title_full |
Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
title_fullStr |
Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
title_full_unstemmed |
Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system |
title_sort |
severe winter cooling during the younger dryas in northern alaska - evidence from the stable isotope composition of a buried ice-wedge system |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/22790/ https://hdl.handle.net/10013/epic.35486 |
genre |
Barrow Climate change glacier Global warming Ice Ice Sheet North Atlantic permafrost wedge* Alaska |
genre_facet |
Barrow Climate change glacier Global warming Ice Ice Sheet North Atlantic permafrost wedge* Alaska |
op_source |
EPIC3Geophysical Research Abstracts; Vol. 12, EGU2010-5677; EGU General Assembly Vienna 2010., 2010 |
op_relation |
Meyer, H. orcid:0000-0003-4129-4706 , Schirrmeister, L. orcid:0000-0001-9455-0596 , Yoshikawa, K. , Opel, T. orcid:0000-0003-1315-8256 , Wetterich, S. orcid:0000-0001-9234-1192 , Hubberten, H. W. and Brown, J. (2010) Severe winter cooling during the Younger Dryas in northern Alaska - evidence from the stable isotope composition of a buried ice-wedge system , Geophysical Research Abstracts; Vol. 12, EGU2010-5677; EGU General Assembly Vienna 2010. . hdl:10013/epic.35486 |
_version_ |
1810434629343117312 |