Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia)
Holocene thermokarst and pingo development in the Kolyma Lowland (NE Siberia)
复制标题
科雷马低地(西伯利亚东北部)的全新世热岩溶和 pingo 发育
DOI:
10.1002/ppp.1979
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发表时间:
2018
影响因子:
5
通讯作者:
Opel T
中科院分区:
文献类型:
--
作者:
Wetterich S;Schirrmeister L;Nazarova L;Palagushkina O;Bobrov A;Pogosyan L;Savelieva L;Syrykh L;Matthes H;Fritz M;Gunther F;Opel T
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‐basedTJuly) 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.
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影响因子:
4.3
作者:
T. Opel;S. Wetterich;H. Meyer;A. Dereviagin;M. Fuchs;Lutz Schirrmeister
通讯作者:
T. Opel;S. Wetterich;H. Meyer;A. Dereviagin;M. Fuchs;Lutz Schirrmeister
DOI:
10.1016/j.palaeo.2017.04.006
发表时间:
2017
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
作者:
O. Palagushkina;S. Wetterich;B. Biskaborn;L. Nazarova;Lutz Schirrmeister;J. Lenz;G. Schwamborn;G. Grosse
通讯作者:
G. Grosse
影响因子:
2.3
作者:
J. Ross Mackay
通讯作者:
J. Ross Mackay
影响因子:
4
作者:
S. Wetterich;S. Kuzmina;Andrei A. Andreev;F. Kienast;H. Meyer;Lutz Schirrmeister;T. Kuznetsova;M. Sierralta
通讯作者:
M. Sierralta
影响因子:
2.2
作者:
Lenz, Josefine;Wetterich, Sebastian;Grosse, Guido
通讯作者:
Grosse, Guido