Insolation driven biomagnetic response to the Holocene Warm Period in semi-arid East Asia.

Insolation driven biomagnetic response to the Holocene Warm Period in semi-arid East Asia.
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半干旱东亚全新世暖期日照驱动的生物磁响应

DOI:
10.1038/srep08001
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发表时间:
2015-01-23
期刊:
影响因子:
4.6
通讯作者:
Zhu R
Zhu R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Liu S;Deng C;Xiao J;Li J;Paterson GA;Chang L;Yi L;Qin H;Pan Y;Zhu R

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全新世温暖期(HWP)为气候系统和生物对环境变异性的反应提供了有价值的见解,因此可以作为未来全球气候变化的绝佳模拟。在这里,我们的文件,第一次,温暖和潮湿的HWP条件是非常有利的磁化石增殖在半干旱的亚洲内陆。大理湖磁化石浓度在~ 9.8ka时的显著增加和在~ 5.9ka时的显著减少分别与HWP的开始和结束相一致,并分别与冰后变暖导致的营养供应增加和亚洲内陆~6 ka时的干旱导致的营养不足有关。   两个阶段的过渡在~7.7 ka与增加的有机碳中HWP,并建议改善气候条件,导致高品质的营养物质流入,促进磁化石增殖。 我们的研究结果代表了一个很好的湖泊记录,其中磁化石丰度,通过营养物质的可用性,由日照驱动的气候变化控制。
The Holocene Warm Period (HWP) provides valuable insights into the climate system and biotic responses to environmental variability and thus serves as an excellent analogue for future global climate changes. Here we document, for the first time, that warm and wet HWP conditions were highly favourable for magnetofossil proliferation in the semi-arid Asian interior. The pronounced increase of magnetofossil concentrations at ~9.8 ka and decrease at ~5.9 ka in Dali Lake coincided respectively with the onset and termination of the HWP and are respectively linked to increased nutrient supply due to postglacial warming and poor nutrition due to drying at ~6 ka in the Asian interior. The two-stage transition at ~7.7 ka correlates well with increased organic carbon in middle HWP and suggests that improved climate conditions, leading to high quality nutrient influx, fostered magnetofossil proliferation. Our findings represent an excellent lake record in which magnetofossil abundance is, through nutrient availability, controlled by insolation driven climate changes.
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