Stalagmite based high resolution precipitation variability for past four centuries in the Indian Central Himalaya: Chulerasim cave re-visited and data re-interpretation

Kotlia, Bahadur Singh, Singh, Anoop Kumar, Zhao, Jian-Xin, Duan, Wuhui, Tan, Ming, Sharma, Arun Kumar and Raza, Waseem (2016) Stalagmite based high resolution precipitation variability for past four centuries in the Indian Central Himalaya: Chulerasim cave re-visited and data re-interpretation. Quaternary International, . doi:10.1016/j.quaint.2016.04.007


Author Kotlia, Bahadur Singh
Singh, Anoop Kumar
Zhao, Jian-Xin
Duan, Wuhui
Tan, Ming
Sharma, Arun Kumar
Raza, Waseem
Title Stalagmite based high resolution precipitation variability for past four centuries in the Indian Central Himalaya: Chulerasim cave re-visited and data re-interpretation
Journal name Quaternary International   Check publisher's open access policy
ISSN 1040-6182
1873-4553
Publication date 2016-05-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.quaint.2016.04.007
Open Access Status Not Open Access
Total pages 9
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2017
Language eng
Formatted abstract
Although the variations in δ18O and δ13C and the U/Th dating in the speleothems are considered as key proxies, improved dating with better quality resolution as well as composition of stalagmites and growth rate along with the cave monitoring are equally important for understanding the high resolution precipitation variability in the past. With a total of six dates on a 11.5 cm long stalagmite, we re-interpret the decadal to century scale climatic changes with multi-year droughts from the Indian Central Himalaya between ca. 1622 and 1950 AD. The sample is composed of aragonite (both compact sub-layers and porous sub-layers). Although, the age model of this young speleothem may be within age uncertainty owing to the high 230Th/232Th isotope ratios, yet the distinction of this study lies in recording various historical drought events which are otherwise never reported from the Himalayan foothills. Additionally, the sample consists of reasonable amount of U (>2 ppm), thus the age correction requirement may be minimum. The higher growth rate and comparatively lower values of δ18O and δ13C are observed during the Little Ice Age (LIA) until ca. 1820 AD, indicating its being wet in the Himalayan foothills in contrast to the Peninsular India and other regions which are solely influenced by the Indian Summer Monsoon (ISM). This is mainly because the monsoon trough moves from the plains to the Himalayan foothills during break-monsoon conditions and provides more orographic precipitation in form of the Westerlies in the south facing Himalayan slopes. The post-LIA period from ca. 1820 AD onwards is interpreted as comparatively drier than the LIA
Keyword Indian Central Himalaya
Little Ice Age (LIA)
Stalagmite
δ18O and δ13C variations
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
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