Arid
Late Holocene climatic changes in Garhwal Himalaya
Kotlia, B. S.; Joshi, L. M.
通讯作者Kotlia, B. S.
来源期刊CURRENT SCIENCE
ISSN0011-3891
出版年2013
卷号104期号:7页码:911-919
英文摘要

Geochemical study of a 3.55 m long lake sediment core from the Badanital Lake (Garhwal Himalaya) reveals Late Holocene centennial-scale climatic changes. The ecosystem of the tectonically formed lake seems to be controlled by natural and anthropogenic factors. The imprints of four major global events, e.g. 4.2 ka event, Medieval Warm Period (MWP), Little Ice Age (LIA) and modern warming are observed. By using the geochemical parameters, e.g. major oxides and their ratios (CaO/MgO, CaO/TiO2, MgO/TiO2, Na2O/TiO2, TiO2/Al2O3, Na2O/K2O and Fe2O3/TiO2), major elements, chemical index of weathering, chemical index of alteration and loss on ignition, the core profile is divided into six major climatic zones. The sediment accumulation rate was extremely slow during a cold/dry phase from ca. 5.1 to 3.5 ka BP. This was followed by wetter/moist phase from ca. 3.5 to 1.8 ka BP and the area further remained under arid conditions from ca. 1800 to 920 years BP. Almost wet/moist environment prevailed around 920-440 years BP, corresponding to the MWP. The LIA (440-160 years BP) was somewhat cooler, whereas post LIA, particularly from 160 years BP points to modern warming.


英文关键词Climatic changes geochemical parameters lake core palaeoclimate
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000318128900022
WOS关键词TREE-RING CHRONOLOGIES ; INDIAN-SUMMER MONSOON ; LESSER HIMALAYA ; LAKE-SEDIMENTS ; TIBETAN PLATEAU ; GROWTH TRENDS ; RENUKA LAKE ; KA BP ; PROVENANCE ; RECORD
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176569
作者单位Kumaun Univ, Ctr Adv Study Geol, Naini Tal 263002, India
推荐引用方式
GB/T 7714
Kotlia, B. S.,Joshi, L. M.. Late Holocene climatic changes in Garhwal Himalaya[J],2013,104(7):911-919.
APA Kotlia, B. S.,&Joshi, L. M..(2013).Late Holocene climatic changes in Garhwal Himalaya.CURRENT SCIENCE,104(7),911-919.
MLA Kotlia, B. S.,et al."Late Holocene climatic changes in Garhwal Himalaya".CURRENT SCIENCE 104.7(2013):911-919.
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