Abstract
Millions of people in the geopolitically important region of Central Asia depend on water from snow- and glacier-melt driven international rivers, most of all the Syr Darya and Amu Darya. The riparian countries of these rivers have experienced recurring water allocation conflicts ever since the Soviet Union collapsed. Will climate change exacerbate water stress and thus conflicts? We have developed a coupled climate, land-ice and rainfall-runoff model for the Syr Darya to quantify impacts and show that climatic changes are likely to have consequences on runoff seasonality due to earlier snow-melt. This will increase water stress in unregulated catchments because less water will be available for irrigation in the summer months. Threats from geohazards, above all glacier lake outbursts, are likely to increase as well. The area at highest risk is the densely populated, agriculturally productive, and politically unstable Fergana Valley. Targeted infrastructural developments will be required in the region. If the current mismanagement of water and energy resources can be replaced with more effective resource allocation mechanisms through the strengthening of transboundary institutions, Central Asia will be able to successfully address these future climate-related challenges.
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Notes
We are grateful to an anonymous reviewer for details on the climate and precipitation characteristics in the different Central Asian regions.
We have also analyzed the 0.5-degree gridded temperature data from the CRU TS2p1 dataset (available at: http://iridl.ldeo.columbia.edu/SOURCES/.UEA/.CRU/.TS2p1/) which exhibits broadly similar trends to those seen at the six stations.
A recent Oxfam report on Central Asia, for instance, argues that “retreating glaciers and more extreme weather could dangerously erode food security, livelihoods and even regional stability in 2050” (Swarup 2010).
This additional contribution to runoff will however only be available over a strictly limited time until land-ice and snow storage are depleted.
In view of future GHG emissions projected by the IPPC, the IEA, and other institutions, the A2 temperature trend may well become reality over the next decades.
The development and calibration of the rainfall-runoff model for the Syr Darya is described in detail in Pereira-Cardenal et al. (2011).
A number of challenges in extracting regional information and trends from IPCC AR4 GCMs have been noted and are discussed elsewhere (Sellars et al., Simulating climate variability and change in Central Asia using a coupled NHMM-AR1 model, in preparation).
With 19.5 km3 total capacity, the Toktogul reservoir is the largest storage facility in the Syr Darya basin. Together with four smaller downstream reservoirs, the facilities have a combined hydropower generation capacity of 2,870 MW (The World Bank 2004).
This hazards map can guide initial monitoring efforts towards the subcatchments which show the largest climate sensitivity of land ice towards climatic changes. However, we would like to emphasize that for this assessment, a linear dynamic model was used. Whereas the linearity assumption of land ice sensitivity towards climate is certainly a good first-order approximation for small-scale volumetric fluctuations, it is problematic in the case of large-scale changes. Hence, solely relying on such model-based output is certainly not the most advisable strategy for the identification of best mitigation strategies in relation to these distributed hazards. Rather, a detailed analysis should utilize remotely sensed data, combined with in-situ observations, to ultimately produce more reliable and detailed hazard maps.
References
Aizen VB, Aizen EM, Melack JM, Kreutz KJ, Cecil LDW (2004) Association between atmospheric circulation patterns and firn-ice core records from the Inilchek glacierized area, central Tien Shan, Asia. J Geophys Res 109(10.1029):D08304
Aizen VB, Aizen EM, Kuzmichonok VA (2007) Glaciers and hydrological changes in the Tien Shan: simulation and prediction. Environ. Res. Lett. 2:045019
Allen RG (2000) Using the FAO-56 dual crop coefficient method over an irrigated region as part of an evapotranspiration intercomparison study. J Hydrol 229(1–2):27–41
Armstrong R, Raup B, Khalsa SJS, Barry R, Kargel J, Helm C, Kieffer H (2005) GLIMS glacier database. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media
Bagla P (2009) No sign yet of Himalayan meltdown, Indian report finds. Science 326(5955):924
Bagla P (2010) Climate science leader Rajendra Pachauri confronts the critics. Science 327(5965):510
Barnett TP, Adam JC, Lettenmaier DP (2005) Potential impacts of a warming climate on water availability in snow-dominated regions. Nature 438(7066):303–309
Bernauer T, Siegfried T (2011) Climate change and international water conflict in central asia. J Peace Res (forthcoming)
Bucknall J, Klytchnikova I, Lampietti J, Lundell M, Scatasta M, Thurman M (2003) Irrigation in Central Asia—social, economic and environmental considerations. Tech. rep., The World Bank
Center for International Earth Science Information Network (CIESIN) (2010) Columbia University; United Nations Food and Agriculture Programme (FAO); and Centro Internacional de Agricultura Tropical (CIAT). Gridded Population of the World: Future Estimates (GPWFE)
Cogley JG, Kargel JS, Kaser G, van der Veen CJ (2010) Tracking the source of glacier misinformation. Science 327(5965):522
Dyurgerov M, Meier MF, Bahr DB (2009) A new index of glacier area change: a tool for glacier monitoring. J Glaciol 55(192):710–716
ECMF (2009) Operational surface analysis dataset
Giorgi F, Christensen J, Hulme M, von Storch H, Whetton P, Jones R, Mearns L, Fu C, Arritt R, Bates B, Benestad R, Boer G, Buishand A, Castro M, Chen D, Cramer W, Crane R, Crossly J, Dehn M, Dethloff K, Dippner J, Emori S, Francisco R, Fyfe J, Gerstengarbe F, Gutowski W, Gyalistras D, Hanssen-Bauer I, Hantel M, Hassell D, Heimann D, Jack C, Jacobeit J, Kato H, Katz R, Kauker F, Knutson T, Lal M, Landsea C, Laprise R, Leung L, Lynch A, May W, McGregor J, Miller N, Murphy J, Ribalaygua J, Rinke A, Rummukainen M, Semazzi F, Walsh K, Werner P, Widmann M, Wilby R, Wild M, Xue Y (2001) Climate change 2001: the scientific basis. Contribution of working group to the third assessment report of the intergouvernmental panel on climate change, chap. Regional Climate Information- Evaluation and Projections. Cambridge University Press, Cambridge, United Kingdom and New York, USA
Gleditsch NP, Nordås R (2007) Climate change and conflict. Polit Geogr 26(6):627–638 (special issue)
Greene AM, Robertson AW, Smyth P, Triglia S (2011) Downscaling forecasts of Indian monsoon rainfall using a nonhomogeneous hidden Markov model. Q. J. R. Meteorol. Soc. doi:10.1002/qj.788
Greuell W, Smeets P (2001) Variations with elevation in the surface energy balance on the Pasterze (Austria). J Geophys Res 106(D23):31717
Haeberli W, Beniston M (1998) Climate change and its impacts on glaciers and permafrost in the Alps. Ambio 27(4):258–265
Huffman GJ, Adler RF, Bolvin DT, Gu G, Nelkin EJ, Bowman KP, Hong Y, Stocker EF, Wolff DB (2007) The TRMM multisatellite precipitation analysis (TMPA): quasi-global, multiyear, combined-sensor precipitation estimates at fine scales. J Hydrometeorol 8(1):38–55
Immerzeel WW, van Beek LPH, Bierkens MFP (2010) Climate change will affect the asian water towers. Science 328:1382–1385
Kirshner S (2005) Modeling of multivariate time series using hidden Markov models. Ph.D. thesis, University of California, Irvine
Malone EL (2010) Changing glaciers and hydrology in Asia—addressing vulnerabilities to glacier melt impacts. Tech. rep., USAID
Mearns R, Norton A (2010) Social dimensions of climate change: equity and vulnerability in a warming world. World Bank Publications
Merton RK (1995) The Thomas theorem and the Matthew effect. Soc Forces 74(2):379–422
MetzCanziani O, Palutikof J, Van Der Linden P, Hanson C B (2007) Climate change 2007: mitigation of climate change: contribution of working group III to the fourth assessment report of the intergovernmental panel on climate change, illustrated edn. Cambridge University Press, Cambridge
Micklin P (2007) The aral sea disaster. Annu Rev Earth Planet Sci 35:47–72
NAM Technical Reference and Model Documentation (2000) DHI - Water & Environment, Denmark
Nayar A (2009) When ice melts. Nature 461:1042–1046
Oerlemans J (2001) Glaciers and climate change. Taylor & Francis
Oerlemans J (2005) Extracting a climate signal from 169 glacier records. Science 308(5722):675
Parry ML, Canziani OF, Palutikof JP, Van Der Linden PJ, Hanson CE (2007) Contribution of working group II to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press
Pereira-Cardenal S, Riegels N, Berry PA, Smith R, Yakovlev A, Siegfried T, Bauer-Gottwein P (2011) Real-time remote sensing driven river basin modeling using radar altimetry. Hydrol Earth Syst Sci 15:241–254
Rabus B, Eineder M, Roth A, Bamler R (2003) The shuttle radar topography mission–a new class of digital elevation models acquired by spaceborne radar. ISPRS J Photogramm Remote Sens 57(4):241–262
Raskin P, Hansen E, Zhu Z, Stavsky D (1992) Simulation of water-supply and demand in the aral sea region. Water Int 17(2):55–67
Robertson AW, Kirshner S, Smyth P (2004) Downscaling of daily rainfall occurrence over Northeast Brazil using a hidden Markov model. J Clim 17(22):4407–4424
Robertson AW, Kirshner S, Smyth P, Charles SP, Bates BC (2006) Subseasonal-to-interdecadal variability of the Australian monsoon over North Queensland. Q J Royal Meteorol Soc 132(615):519–542
Robertson AW, Moron V, Swarinoto Y (2009) Seasonal predictability of daily rainfall statistics over Indramayu district, Indonesia. Int J Climatol 29:1449–1462
Schaefer JM, Denton GH, Barrell DJA, Ivy-Ochs S, Kubik PW, Andersen BG, Phillips FM, Lowell TV, Schluchter C (2006) Near-synchronous interhemispheric termination of the last glacial maximum in mid-latitudes. Science 312(5779):1510
Siegfried T, Bernauer T (2007) Estimating the performance of international regulatory regimes. Water Resour Res 43:W11406. doi:10.1029/2006WR005738
Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt K, Tignor M, Miller HL (2007) IPCC, 2007: Climate change 2007: the physical science basis. contribution of working group I to the fourth assessment report of the Intergovernmental Panel on Climate Change. New York, Cambridge University Press
Swarup A (2010) Oxfam. Tech. rep., Oxfam International, Dushanbe, Tajikistan
The MathWorks (2003) MATLAB version R2011a, Natick, Massachusetts: The MathWorks Inc
The World Bank (2004) Water energy nexus in Central Asia: improving regional cooperation in the Syr Darya basin. Tech. rep., The World Bank
Timbal B, Hope P, Charles S (2008) Evaluating the consistency between statistically downscaled and global dynamical model climate change projections. J Clim 21:6052–6059
United Nations Department of Economic and Social Affairs (2007) World population Prospect—the 2006 Revision. Tech. rep., United Nations
United Nations Department of Economic and Social Affairs (2011) Population Division, World Population Prospects: The 2010 Revision, New York
Verbist K, Robertson AW, Cornelis W, Gabriëls D (2010) Seasonal predictability of daily rainfall characteristics in central-northern Chile for dry-land management. J Appl Meteoratol Clim 49(9):1938–1955
Wilby RL, Hay LE, Leavesley GH (1999) A comparison of downscaled and raw GCM output: implications for climate change scenarios in the San Juan River basin, Colorado. J Hydrol 225(1–2):67–91
Wilson L (1973) Variations in mean annual sediment yield as a function of mean annual precipitation. Am J Sci 273(4):335
Yip S, Ferro CAT, Stephenson DB, Hawkins E (2010) A simple, coherent framework for partitioning uncertainty in climate predicitions
Acknowledgements
Support from the CORC-ARCHES program at the Lamont-Doherty Earth Observatory, the Swiss Network for International Studies (SNIS) and the International Research School of Water Resources (FIVA) in Copenhagen is acknowledged. We would specifically like to thank Peter Schlosser for facilitating CORC-ARCHES funding. Andrew W. Robertson’s work was supported by the National Oceanic and Atmospheric Administration through a Cooperative Agreement with Columbia University. The Open Society Institute is acknowledged for providing partial funding of a research trip to Central Asia. We thank DHI and Roar Askær Jensen for providing free access to the MIKE software package. We acknowledge the modeling groups, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) and the WCRP’s Working Group on Coupled Modeling (WGCM) for their roles in making available the WCRP CMIP3 multi-model dataset. Support of this dataset is provided by the Office of Science, U.S. Department of Energy.
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Siegfried, T., Bernauer, T., Guiennet, R. et al. Will climate change exacerbate water stress in Central Asia?. Climatic Change 112, 881–899 (2012). https://doi.org/10.1007/s10584-011-0253-z
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DOI: https://doi.org/10.1007/s10584-011-0253-z