Glacial mass balance changes in the Karakoram and Himalaya based on CMIP5 multi-model climate projections
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The impact of future climate change on the glaciers in the Karakoram and Himalaya (KH) is investigated using CMIP5 multi-model temperature and precipitation projections, and a relationship between glacial accumulation-area ratio and mass balance developed for the region based on the last 30 to 40 years of observational data. We estimate that the current glacial mass balance (year 2000) for the entire KH region is -6.6 ± 1 Gta−1, which decreases about sixfold to -35 ± 2 Gta−1 by the 2080s under the high emission scenario of RCP8.5. However, under the low emission scenario of RCP2.6 the glacial mass loss only doubles to -12 ± 2 Gta−1 by the 2080s. We also find that 10.6 and 27 % of the glaciers could face ‘eventual disappearance’ by the end of the century under RCP2.6 and RCP8.5 respectively, underscoring the threat to water resources under high emission scenarios.
KeywordsMass Balance CMIP5 Model Taylor Diagram Precipitation Projection Western Himalaya Region
RKC thanks the Ministry of Environment and Forests, Government of India, for supporting this study in form of the ‘National Environmental Sciences fellowship’. We thank the Department of Science and Technology, Government of India, for supporting Divecha Centre for Climate Change. We acknowledge the World Climate Research Programme’s Working Group on Coupled Modeling, which is responsible for CMIP, and we thank the climate modeling groups (listed in the Supplementary Table S1 of this paper) for producing and making available their model outputs. We also thank Dr. G. Cogley and two other anonymous reviewers for providing valuable suggestions.
Competing financial interests statement
The authors declare no competing financial interests.
- Bajracharya SR, Shrestha B (eds) (2011) The status of glaciers in the Hindu Kush-Himalayan region. International Centre for Integrated Mountain Development, Kathmandu, Nepal, 137pGoogle Scholar
- Bookhagen B, Burbank DW (2010) Toward a complete Himalayan hydrological budget: spatiotemporal distribution of snowmelt and rainfall and their impact on river discharge. J Geophys Res 115, F03019Google Scholar
- Chaturvedi RK, Joshi J, Jayaraman M, Bala G, Ravindranath NH (2012) Multi-model climate change projections for India under representative concentration pathways. Curr Sci 103:791–802Google Scholar
- Fujita K, Takeuchi N, Seko K (1998) Glaciological observations of Yala glacier in Langtang valley, Nepal Himalayas, 1994 and 1996. Bull Glaciol Res 16:75–81Google Scholar
- Kulkarni AV (1992) Mass balance of Himalayan glaciers using AAR and ELA methods. J Glaciol 38:101–104Google Scholar
- Kulkarni AV, Rathore BP, Alex S (2004) Monitoring of glacial mass balance in the baspa basin using accumulation area ratio method. Curr Sci 86:101–106Google Scholar
- Kulkarni AV, Rathore BP, Mahajan S, Mathur P (2005) Alarming retreat of Parbati glacier, Beas basin, Himachal Pradesh. Curr Sci 88:1844–1850Google Scholar
- Kulkarni AV et al (2007) Glacial retreat in Himalaya using Indian remote sensing satellite data. Curr Sci 92:69–74Google Scholar
- Ohmura A, Kasser P, Funk M (1992) Climate at the equilibrium line of glaciers. J Glaciol 38:397–411Google Scholar
- Radic V, Bliss A, Beedlow AC, Hock R, Miles E, Cogley JG (2013) Regional and global projections of twenty-first century glacier mass changes in response to climate scenarios from global climate models. Clim Dyn 1–22, doi: 10.1007/s00382-013-1719-7
- Rathore BP, Kulkarni AV, Sherasia NK (2009) Understanding future changes in snow and glacier melt runoff due to global warming in Wangar Gad basin, India. Curr Sci 97:1077–1081Google Scholar