Late Holocene Asian monsoon variations recorded in Lake Rara sediment,western Nepal |
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| Authors: | Atsunori Nakamura Yusuke Yokoyama Hideaki Maemoku Hiroshi Yagi Makoto Okamura Hiromi Matsuoka Nao Miyake Toshiki Osada Hirofumi Teramura Danda Pani Adhikari Vishnu Dangol Yosuke Miyairi Stephen Obrochta Hiroyuki Matsuzaki |
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| Institution: | 1. Atmosphere and Ocean Research Institute, University of Tokyo, 5‐1‐5 Kashiwanoha, Kashiwa, Chiba 277‐8564, Japan;2. Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Japan;3. Institute of Biogeoscience, Japan Agency of Marine Science and Technology (JAMSTEC), Kanagawa, Japan;4. Program in Science, Technology and Social Studies Education, Graduate School of Education, Hiroshima University, Japan;5. Department of Information, Environmental and Food Sciences, Faculty of Education, Art and Science, Yamagata University, Japan;6. Research and Education Faculty, Natural Sciences Cluster, Sciences Unit, Kochi University, 2‐5‐1 Akebono‐cho, Kochi‐shi, Kochi 780‐8520, Japan;7. Research Institute for Humanity and Nature, National Institutes for the Humanities, Inter‐University Research Institute Corporation, Kyoto, Japan;8. Department of Geology, Tri‐Chandra Campus, Tribhuvan University, Ghantaghar, Kathmandu, Nepal;9. Department of Nuclear Engineering and Management, School of Engineering, University of Tokyo, Japan |
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| Abstract: | The Himalayas are a key location for understanding centennial‐ to millennial‐scale variations in the Asian monsoon, yet few studies of the late Holocene have been conducted in this sensitive area. Direct evidence for shifts in monsoonal wind strength is often limited to marine proxy records, while terrestrial reconstructions (e.g. lake levels and spleothems) focus on precipitation. Here, we present the first evidence of terrestrial summer monsoon wind strength changes from Lake Rara, western Nepal, based on Mn/Ti ratios, a proxy for lake stratification. These data indicate a link between the Arabian Sea and the Himalayas, suggesting that centennial‐ to millennial‐scale changes in wind strength occurred synchronously. Distinct similarity is also observed between Lake Rara and the southern part of China, which may support previous suggestions that the southern part of China is influenced by Indian summer monsoon. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | monsoon Holocene Lake Rara Himalayas speleothem |
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