Climatic fluctuations during the LIA and post-LIA in the Kumaun Lesser Himalaya, India: Evidence from a 400 y old stalagmite record

• Published in: Quaternary International
• Main Authors: Kotlia, Bahadur Singh, Ahmad, Syed Masood, Zhao, Jian-Xin, Raza, Waseem, Collerson, Kenneth D., Joshi, Lalit Mohan, Sanwal, Jaishri
• Format: Article in Journal/Newspaper
• Language: English
• Published: Pergamon 2012
• Subjects: Summer monsoon precipitation; Asian southwest monsoon; Medieval warm period; Ice-age; Late holocene; Hydrological changes; 1904 Earth-Surface Processes; Indian; North Atlantic; North Atlantic oscillation
• Online Access: https://espace.library.uq.edu.au/view/UQ:278267

This paper presents the first stable isotope (delta O-18 and delta C-13) data of a similar to 400 years (1590-2006 AD) long annual to decadal-resolution speleothem record collected from the Indian Lesser Himalaya. The data show a variation from -2.7 to -5.9 parts per thousand in delta O-18 and -5.3 to -8.8 parts per thousand in delta C-13. The isotopic analyses indicate that the climate during this period can be divided into two stages: a wet phase during the Little Ice Age (LIA) (1590-1850 AD) and comparatively dry phase during the post-LIA after 1850 AD. However, the record also documents the minor dry events during the LIA and a wet episode after the LIA. Within the age uncertainty, the dry spells during the LIA are linked with the historical drought events in the Indian subcontinent and similar latitudes. The isotopic record is consistent with a number of previous studies in the areas influenced by the Westerlies but appears to be conflicting to the regions, dominated by the Indian Summer Monsoon (ISM). This may be due to the possible changes in the strength of Westerlies in the study area and added by negative anomaly of North Atlantic Oscillation (NAO) during the LIA. (C) 2012 Elsevier Ltd and INQUA. All rights reserved.