Evidence of Holocene climatic change and human impact in northwestern Yunnan Province: High-resolution pollen and charcoal records from Chenghai Lake, southwestern China
Evidence of Holocene climatic change and human impact in northwestern Yunnan Province: High-resolution pollen and charcoal records from Chenghai Lake, southwestern China
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云南省西北部全新世气候变化和人类影响的证据：来自中国西南部程海湖的高分辨率花粉和木炭记录
DOI：
10.1177/0959683617715692
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发表时间：
2018-01
期刊：
影响因子：
--
通讯作者：
Wang Sumin
中科院分区：
文献类型：
--
作者：
Xiao Xiayun;Haberle Simon G;Li YanLing;Liu Enfeng;Shen Ji;Zhang Enlou;Yin Jianji;Wang Sumin
本文报道了云南澄海湖的高分辨率孢粉和木炭记录。这些记录揭示了8220 cal. yr BP以来气候和人类活动的变化，并根据铁杉和万年青栎花粉百分比的光谱分析进一步讨论了气候变化的驱动因素。花粉记录表明，在8220-4670 cal. yr BP期间，低海拔地区气候相对温暖，适度干燥，而高海拔地区气候相对凉爽，湿润，对应于全新世气候最佳时期，尽管降水的季节性在5180 - 4670 cal. yr BP期间有所增加。从4670到3470 cal. yarBP，温度下降，降水量和季节性减少。3470和1860 cal. yr BP之间，温度仍然相对较低，降水量似乎进一步减少。与此同时，以农业种植为代表的人类活动开始影响该研究区，但人类活动强度相对较弱。1860 cal. yr BP后，气候逐渐变得干燥，人类活动的强度，如森林砍伐和刀耕火种农业增加。对铁杉和万年青栎花粉百分比的谱分析表明，在≥95%的置信水平下，云南西北部全新世西南季风和过去气候变化具有显著的1500年和200年的周期性，表明千年至百年尺度的日照和反馈相互作用是西南季风和过去气候变化的主要驱动机制。
High-resolution pollen and charcoal records from Chenghai Lake, northwestern Yunnan Province of China, are presented in this study. These records reveal changes in climate and human activity since 8220 cal. yr BP, and the drivers of climatic change are further discussed based on spectral analysis of Tsuga and evergreen oak pollen percentages. The pollen record indicated that the climate in the low altitude area was relatively warm and moderately dry, whereas the climate in the high altitude area was relatively cool and humid during the period 8220–4670 cal. yr BP, corresponding to the Holocene climate optimum, although the seasonality of precipitation increased between 5180 and 4670 cal. yr BP. From 4670 to 3470 cal. yr BP, the temperature declined, and the precipitation and its seasonality decreased. Between 3470 and 1860 cal. yr BP, the temperature was still relatively low, and precipitation appeared to decrease further. At the same time, human activity represented by agricultural planting began to influence this study area, but the intensity of human activity was relatively weak. After 1860 cal. yr BP, the climate was gradually becoming drier and the intensity of human activity such as deforestation and slash-and-burn agriculture increased. Spectral analysis of Tsuga and evergreen oak pollen percentages shows statistically significant periodicities of ~1500 and ~200 years at the ≥95% confidence level, which suggests that insolation and feedback interactions on millennial to centennial scales are the primary forcing mechanisms of the southwest monsoon and past climatic change during the Holocene in northwestern Yunnan Province, southwestern China.
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影响因子：
3.9
作者：
Berger, WH;von Rad, U
通讯作者：
von Rad, U
DOI：
--
发表时间：
1982
期刊：
--
影响因子：
--
作者：
R. Clark
通讯作者：
R. Clark
影响因子：
2.3
作者：
M. Thamban;H. Kawahata;V. Rao
通讯作者：
M. Thamban;H. Kawahata;V. Rao
影响因子：
3.9
作者：
Li Shaomeng;Qiao Yulou;D. Walker
通讯作者：
Li Shaomeng;Qiao Yulou;D. Walker
影响因子：
4.4
作者：
M. Blaauw;J. Christen
通讯作者：
M. Blaauw;J. Christen