dc.contributor.author |
Wetterich S. |
|
dc.contributor.author |
Schirrmeister L. |
|
dc.contributor.author |
Nazarova L. |
|
dc.contributor.author |
Palagushkina O. |
|
dc.contributor.author |
Bobrov A. |
|
dc.contributor.author |
Pogosyan L. |
|
dc.contributor.author |
Savelieva L. |
|
dc.contributor.author |
Syrykh L. |
|
dc.contributor.author |
Matthes H. |
|
dc.contributor.author |
Fritz M. |
|
dc.contributor.author |
Günther F. |
|
dc.contributor.author |
Opel T. |
|
dc.contributor.author |
Meyer H. |
|
dc.date.accessioned |
2019-01-22T20:40:31Z |
|
dc.date.available |
2019-01-22T20:40:31Z |
|
dc.date.issued |
2018 |
|
dc.identifier.issn |
1045-6740 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/148240 |
|
dc.description.abstract |
© 2018 John Wiley & Sons, Ltd. Ground ice and sedimentary records of a pingo exposure reveal insights into Holocene permafrost, landscape and climate dynamics. Early to mid-Holocene thermokarst lake deposits contain rich floral and faunal paleoassemblages, which indicate lake shrinkage and decreasing summer temperatures (chironomid-based TJuly) from 10.5 to 3.5 cal kyr BP with the warmest period between 10.5 and 8 cal kyr BP. Talik refreezing and pingo growth started about 3.5 cal kyr BP after disappearance of the lake. The isotopic composition of the pingo ice (δ18O − 17.1 ± 0.6‰, δD −144.5 ± 3.4‰, slope 5.85, deuterium excess −7.7± 1.5‰) point to the initial stage of closed-system freezing captured in the record. A differing isotopic composition within the massive ice body was found (δ18O − 21.3 ± 1.4‰, δD −165 ± 11.5‰, slope 8.13, deuterium excess 4.9± 3.2‰), probably related to the infill of dilation cracks by surface water with quasi-meteoric signature. Currently inactive syngenetic ice wedges formed in the thermokarst basin after lake drainage. The pingo preserves traces of permafrost response to climate variations in terms of ground-ice degradation (thermokarst) during the early and mid-Holocene, and aggradation (wedge-ice and pingo-ice growth) during the late Holocene. |
|
dc.relation.ispartofseries |
Permafrost and Periglacial Processes |
|
dc.subject |
bioindicators |
|
dc.subject |
cryolithology |
|
dc.subject |
hydrochemistry |
|
dc.subject |
Khalerchinskaya tundra |
|
dc.subject |
stable water isotopes |
|
dc.title |
Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia) |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
3 |
|
dc.relation.ispartofseries-volume |
29 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
182 |
|
dc.source.id |
SCOPUS10456740-2018-29-3-SID85050799249 |
|