Research output: Contribution to journal › Article › peer-review
Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia). / Wetterich, Sebastian; Schirrmeiste, Lutz; Nazarova, Larisa; Palagushkina, Olga; Bobrov, Anatoly; Pogosyan, Lilit; Savelieva, Larisa; Syrykh, Liudmila; Matthes, Heidrun; Fritz, Michael; Guenther, Frank; Opel, Thomas; Meyer, Hanno.
In: Permafrost and Periglacial Processes, Vol. 29, No. 3, 01.07.2018, p. 182-198.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia)
AU - Wetterich, Sebastian
AU - Schirrmeiste, Lutz
AU - Nazarova, Larisa
AU - Palagushkina, Olga
AU - Bobrov, Anatoly
AU - Pogosyan, Lilit
AU - Savelieva, Larisa
AU - Syrykh, Liudmila
AU - Matthes, Heidrun
AU - Fritz, Michael
AU - Guenther, Frank
AU - Opel, Thomas
AU - Meyer, Hanno
PY - 2018/7/1
Y1 - 2018/7/1
N2 - 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 T-July) 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 (delta O-18 - 17.1 +/- 0.6 parts per thousand, delta D -144.5 +/- 3.4 parts per thousand, slope 5.85, deuterium excess -7.7 +/- 1.5 parts per thousand) point to the initial stage of closed-system freezing captured in the record. A differing isotopic composition within the massive ice body was found (delta O-18 - 21.3 +/- 1.4 parts per thousand, delta D -165 +/- 11.5 parts per thousand, slope 8.13, deuterium excess 4.9 +/- 3.2 parts per thousand), 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.
AB - 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 T-July) 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 (delta O-18 - 17.1 +/- 0.6 parts per thousand, delta D -144.5 +/- 3.4 parts per thousand, slope 5.85, deuterium excess -7.7 +/- 1.5 parts per thousand) point to the initial stage of closed-system freezing captured in the record. A differing isotopic composition within the massive ice body was found (delta O-18 - 21.3 +/- 1.4 parts per thousand, delta D -165 +/- 11.5 parts per thousand, slope 8.13, deuterium excess 4.9 +/- 3.2 parts per thousand), 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.
KW - bioindicators
KW - cryolithology
KW - hydrochemistry
KW - Khalerchinskaya tundra
KW - stable water isotopes
KW - NORTHERN SEWARD PENINSULA
KW - WESTERN ARCTIC COAST
KW - DMITRY LAPTEV STRAIT
KW - LATE QUATERNARY
KW - STABLE-ISOTOPES
KW - GROUND-ICE
KW - LENA DELTA
KW - DATA SET
KW - PERMAFROST
KW - ALASKA
UR - http://www.scopus.com/inward/record.url?scp=85050799249&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/holocene-thermokarst-pingo-development-kolyma-lowland-ne-siberia
U2 - 10.1002/ppp.1979
DO - 10.1002/ppp.1979
M3 - статья
VL - 29
SP - 182
EP - 198
JO - Permafrost and Periglacial Processes
JF - Permafrost and Periglacial Processes
SN - 1045-6740
IS - 3
ER -
ID: 36425782