Показать сокращенную информацию
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 |