IEECAS OpenIR  > 加速器质谱中心
The environmental magnetic record of palaeoenvironmental variationsduring the past 3100 years: A possible solar influence?
K. Sandeep[1]; R. Shankar[1]; Anish K. Warrier[1]; Zhou,WJ(Zhou,Weijian)[2]; Lu,XF(Lu,Xuefeng)[2]
2015-07
发表期刊Journal of Applied Geophysics
卷号118期号:2015页码:24-36
文章类型期刊论文
摘要

Sediments from Pookot Lake (PK) in southern India have provided a record of local environmental changes and catchment processes during the past 3100 cal. years B.P. Variations in the rock magnetic parameters (χlf, χfd, χARM and IRM's at different field strengths) of sediments from two AMS 14C-dated cores reflect climate-induced changes in the catchment of Pookot Lake. Assuming that rainfall is most likely the dominant driving mechanism behind the rock magnetic variations of PK sediments, the environmental history of the site has been reconstructed. Rock magnetic parameters exhibit significant variations during the past 3100 years. The palaeoenvironmental history of the Pookot Lake region may be divided into three phases. During the first phase (~3100 to 2500 cal. years B.P.), catchment erosion and detrital influx were high, indicating a strong monsoon. The second phase, which lasted from 2500 to 1000 cal. years B.P., was characterised by low and steady rainfall, resulting in a low and uniform catchment erosion and detrital influx. Phase 2 was interspersed with brief intervals of strong monsoon and characterised by frequent drying up of the lake. During Phase 3 (~1000 cal. years B.P. to the present), catchment erosion was high, indicating a shift to strong monsoonal conditions. It appears that monsoonal rainfall in the region is influenced by solar activity, with periods of high total solar irradiance being characterised by high rainfall and vice versa; it was relatively low during the Little Ice Age and high during the Medieval Warm Period. The magnetic susceptibility (χlf) data exhibit a number of periodicities which might have a solar origin. The χlf record exhibits similarities with other continental and marine palaeoclimatic records from the region, indicating that regional trends in the monsoon during the Late Holocene are broadly similar.

关键词Rock Magnetism Magnetic Susceptibility Rainfall Lake Sediments Total Solar Irradiance Spectral Analysis
DOI10.1016/j.jappgeo.2015.03.023
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9528
专题加速器质谱中心
作者单位1.Department of Marine Geology, Mangalore University, Mangalagangotri, 574 199, India;
2.Xi'an AMS Center, Institute of Earth Environment, Xi'an, China
推荐引用方式
GB/T 7714
K. Sandeep[1],R. Shankar[1],Anish K. Warrier[1],et al. The environmental magnetic record of palaeoenvironmental variationsduring the past 3100 years: A possible solar influence?[J]. Journal of Applied Geophysics,2015,118(2015):24-36.
APA K. Sandeep[1],R. Shankar[1],Anish K. Warrier[1],Zhou,WJ,&Lu,XF.(2015).The environmental magnetic record of palaeoenvironmental variationsduring the past 3100 years: A possible solar influence?.Journal of Applied Geophysics,118(2015),24-36.
MLA K. Sandeep[1],et al."The environmental magnetic record of palaeoenvironmental variationsduring the past 3100 years: A possible solar influence?".Journal of Applied Geophysics 118.2015(2015):24-36.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The environmental ma(2248KB)期刊论文作者接受稿开放获取CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[K. Sandeep[1]]的文章
[R. Shankar[1]]的文章
[Anish K. Warrier[1]]的文章
百度学术
百度学术中相似的文章
[K. Sandeep[1]]的文章
[R. Shankar[1]]的文章
[Anish K. Warrier[1]]的文章
必应学术
必应学术中相似的文章
[K. Sandeep[1]]的文章
[R. Shankar[1]]的文章
[Anish K. Warrier[1]]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。