Short-term dynamics of a low-centred ice-wedge polygon near Chokurdakh (NE Yakutia, NE Siberia) and climate change during the last ca 1250 years
Short-term dynamics of a low-centred ice-wedge polygon near Chokurdakh (NE Yakutia, NE Siberia) and climate change during the last ca 1250 years
复制标题
乔库达赫(雅库特东北部、西伯利亚东北部)附近低中心冰楔多边形的短期动态和过去约 1250 年的气候变化
DOI:
10.1016/j.quascirev.2011.06.016
复制
发表时间:
2011
影响因子:
4
通讯作者:
Joosten H
中科院分区:
文献类型:
--
作者:
de Klerk P;Donner N;Karpov NS;Minke M;Joosten H
Palaeoecological studies (including analysis of pollen, macrofossils, geochemistry, and AMS radiocarbon dates) of four peat sections from one low-centred ice-wedge polygon in NE Yakutia (NE Siberia) allow the three-dimensional reconstruction of polygon development during the last ca 1250 years. After drainage of a lake, peat forming vegetation invaded rapidly. Comparison with palaeotemperature data shows that the initial formation of mature ridges coincided with a period of high summer temperatures around AD 1400. The ridges persisted and expanded during the subsequent colder ca 200 years. Partial collapse of various ridges at the end of the 18th century corresponded to a phase with low summer temperatures. During the warm, 20th century one collapsed ridge regenerated, whereas another persisted in its collapsed state. Ice-wedge polygons are, thus, complex and highly dynamic ecosystems, in which changes in temperature and precipitation may induce rapid ecological changes by the complex interplay of water, ice and vegetation. Our study indicates that global warming associated with a decrease in summer precipitation may initially result in enhanced polygon ridge formation. The combination of longer summers and increased winter precipitation, as predicted for high latitudes will, however, eventually result in larger meltwater input in the polygon mires, which may cause the (partial) collapse of polygon ridges and underlying ice-wedges.
登录
查看更多内容
影响因子:
--
作者:
W. Eisner;K. Peterson
通讯作者:
K. Peterson
DOI:
10.2307/1552417
发表时间:
2000
期刊:
Arctic, Antarctic, and Alpine Research
影响因子:
--
作者:
D. Walker;F. Wielgolaski
通讯作者:
F. Wielgolaski
影响因子:
12.1
作者:
J. Praglowski
通讯作者:
J. Praglowski
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
H. Joosten;P. Klerk
通讯作者:
P. Klerk
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
P. Anderson;A. Lozhkin;W. Eisner;M. Kozhevnikova;D. Hopkins;L. Brubaker;P. Colinvaux
通讯作者:
P. Colinvaux