Global-scale glacier shrinkage is one of the most prominent signs of ongoing climatic change. However, important differences in glacier response exist at the regional scale, and evidence has accumulated that one particular region stands out: the Karakoram. In the past two decades, the region has shown balanced to slightly positive glacier budgets, an increase in glacier ice flow speeds, stable to partially advancing glacier termini and widespread glacier surge activity. This is in stark contrast to the rest of High Mountain Asia, where glacier retreat and slowdown dominate, and glacier surging is largely absent. Termed the Karakoram Anomaly, recent observations show that the anomalous glacier behaviour partially extends to the nearby Western Kun Lun and Pamir. Several complementary explanations have now been presented for the Anomaly’s deeper causes, but our understanding is far from complete. Whether the Anomaly will continue to exist in the coming decades remains unclear, but its long-term persistence seems unlikely in light of the considerable warming anticipated by current projections of future climate.
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The data shown in the individual figures are available in the publications cited.
Hewitt, K. Rock avalanches that travel onto glaciers and related developments, Karakoram Himalaya, Inner Asia. Geomorphology 103, 66–79 (2009).
RGI Consortium. Randolph Glacier Inventory—A Dataset of Global Glacier Outlines: Version 6. 0 (Global Land Ice Measurements from Space, 2017); https://doi.org/10.7265/N5-RGI-60
Farinotti, D. et al. A consensus estimate for the ice thickness distribution of all glaciers on Earth. Nat. Geosci. 12, 168–173 (2019).
Armstrong, R. L. et al. Runoff from glacier ice and seasonal snow in High Asia: separating melt water sources in river flow. Reg. Environ. Change 19, 1249–1261 (2019).
Akhtar, M., Ahmad, N. & Booij, M. J. The impact of climate change on the water resources of Hindukush-Karakorum-Himalaya region under different glacier coverage scenarios. J. Hydrol. 355, 148–163 (2008).
Immerzeel, W., van Beek, L. & Bierkens, M. Climate change will affect the Asian water towers. Science 328, 1382–1385 (2010).
Huss, M. & Hock, R. Global-scale hydrological response to future glacier mass loss. Nat. Clim. Change 8, 135–140 (2018).
Pritchard, H. D. Asia’s shrinking glaciers protect large populations from drought stress. Nature 569, 649–654 (2019).
Schlagintweit, H., Schlagintweit, A. & Schlagintweit, R. Results of a Scientific Mission to India and High Asia Undertaken Between the Years 1854 and 1858 (Trubner, 1861).
Godwin-Austen, H. H. The glaciers of the Muztagh Range. Proc. R. Geogr. Soc. 34, 19–56 (1864).
Shaw, R. Visits to High Tartary, Yarkand, and Kashghar: Formerly Chinese Tartary (John Murray, 1871).
Hayden, H. H. Notes on certain glaciers in Northwest Kashmir. Rec. Geol. Surv. India 35, 127–137 (1907).
Zemp, M. et al. Global glacier mass balances and their contributions to sea-level rise from 1961 to 2016. Nature 568, 382–386 (2019).
Berthier, E. & Brun, F. Karakoram glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier. J. Glaciol. 65, 494–507 (2019).
Dehecq, A. et al. Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia. Nat. Geosci. 12, 22–27 (2019).
Quincey, D. J., Glasser, N. F., Cook, S. J. & Luckman, A. Heterogeneity in Karakoram glacier surges. J. Geophys. Res. Earth Surf. 120, 1288–1300 (2015).
Meier, M. F. & Post, A. What are glacier surges? Can. J. Earth Sci. 6, 807–817 (1969).
Sevestre, H. & Benn, D. Climatic and geometric controls on the global distribution of surge-type glaciers: implications for a unifying model of surging. J. Glaciol. 61, 646–662 (2015).
Mason, K. The Glaciers of the Karakoram and Neighbourhood (Geological Survey of India, 1930).
Copland, L. et al. Expanded and recently increased glacier surging in the Karakoram. Arct. Antarct. Alp. Res. 43, 503–516 (2011).
Hewitt, K. The Karakoram anomaly? Glacier expansion and the ‘elevation effect’, Karakoram Himalaya. Mt. Res. Dev. 25, 332–340 (2005).
Gardelle, J., Berthier, E. & Arnaud, Y. Slight mass gain of Karakoram glaciers in the early twenty-first century. Nat. Geosci. 5, 322–325 (2012).
Kääb, A., Berthier, E., Nuth, C., Gardelle, J. & Arnaud, Y. Contrasting patterns of early twenty-first-century glacier mass change in the Himalayas. Nature 488, 495–498 (2012).
Gardelle, J., Berthier, E., Arnaud, Y. & Kääb, A. Region-wide glacier mass balances over the Pamir-Karakoram-Himalaya during 1999–2011. Cryosphere 7, 1263–1286 (2013).
Gardner, A. S. et al. A reconciled estimate of glacier contributions to sea level rise: 2003 to 2009. Science 340, 852–857 (2013).
Kääb, A., Treichler, D., Nuth, C. & Berthier, E. Brief communication: contending estimates of 2003–2008 glacier mass balance over the Pamir-Karakoram-Himalaya. Cryosphere 9, 557–564 (2015).
Azam, M. F. et al. Review of the status and mass changes of Himalayan-Karakoram glaciers. J. Glaciol. 64, 61–74 (2018).
Brun, F., Berthier, E., Wagnon, P., Kääb, A. & Treichler, D. A spatially resolved estimate of High Mountain Asia glacier mass balances from 2000 to 2016. Nat. Geosci. 10, 668–673 (2017).
Brun, F. et al. Heterogeneous influence of glacier morphology on the mass balance variability in High Mountain Asia. J. Geophys. Res. Earth Surf. 124, 1331–1345 (2019).
Scherler, D. & Strecker, M. R. Large surface velocity fluctuations of Biafo Glacier, central Karakoram, at high spatial and temporal resolution from optical satellite images. J. Glaciol. 58, 569–580 (2012).
Lv, M. et al. Characterizing the behaviour of surge- and non-surge-type glaciers in the Kingata Mountains, eastern Pamir, from 1999 to 2016. Cryosphere 13, 219–236 (2019).
Heid, T. & Kääb, A. Repeat optical satellite images reveal widespread and long term decrease in land-terminating glacier speeds. Cryosphere 6, 467–478 (2012).
Scherler, D., Bookhagen, B. & Strecker, M. R. Spatially variable response of Himalayan glaciers to climate change affected by debris cover. Nat. Geosci. 4, 156–159 (2011).
Rankl, M., Kienholz, C. & Braun, M. Glacier changes in the Karakoram region mapped by multimission satellite imagery. Cryosphere 8, 977–989 (2014).
Minora, U. et al. Glacier area stability in the Central Karakoram National Park (Pakistan) in 2001–2010: the “Karakoram Anomaly” in the spotlight. Progr. Phys. Geogr. Earth Environ. 40, 629–660 (2016).
Bolch, T. et al. The state and fate of Himalayan Glaciers. Science 336, 310–314 (2012).
Cogley, J. G. Glacier shrinkage across High Mountain Asia. Ann. Glaciol. 57, 41–49 (2016).
Herreid, S. et al. Satellite observations show no net change in the percentage of supraglacial debris-covered area in northern Pakistan from 1977 to 2014. J. Glaciol. 61, 524–536 (2015).
Goerlich, F. & Paul, F. Surging glaciers everywhere? An updated inventory of surging glaciers for the Pamir Mountains derived from the analysis of multi-temporal optical satellite data. In EGU General Assembly Conference Abstracts Vol. 21, 5747-2 (EGU, 2019).
Chudley, T. R. & Willis, I. C. Glacier surges in the north-west West Kunlun Shan inferred from 1972 to 2017 Landsat imagery. J. Glaciol. 65, 1–12 (2019).
Bhambri, R., Hewitt, K., Kawishwar, P. & Pratap, B. Surge-type and surge-modified glaciers in the Karakoram. Sci. Rep. 7, 15391 (2017).
Mayewski, P. A. & Jeschke, P. A. Himalayan and Trans-Himalayan glacier fluctuations since AD 1812. Arct. Alp. Res. 11, 267–287 (1979).
Hewitt, K. Glacier change, concentration, and elevation effects in the Karakoram Himalaya, upper Indus basin. Mt. Res. Dev. 31, 188–200 (2011).
Bhutiyani, M. R. Mass-balance studies on Siachen glacier in the Nubra valley, Karakoram Himalaya, India. J. Glaciol. 45, 112–118 (1999).
Zaman, Q. & Liu, J. Mass balance of Siachen Glacier, Nubra valley, Karakoram Himalaya: facts or flaws? J. Glaciol. 61, 1012–1014 (2015).
Zhou, Y., Li, Z., Li, J., Zhao, R. & Ding, X. Slight glacier mass loss in the Karakoram region during the 1970s to 2000 revealed by KH-9 images and SRTM DEM. J. Glaciol. 63, 331–342 (2017).
Bolch, T., Pieczonka, T., Mukherjee, K. & Shea, J. Brief communication: Glaciers in the Hunza catchment (Karakoram) have been nearly in balance since the 1970s. Cryosphere 11, 531–539 (2017).
Zhou, Y., Li, Z., Li, J., Zhao, R. & Ding, X. Glacier mass balance in the Qinghai-Tibet Plateau and its surroundings from the mid-1970s to 2000 based on Hexagon KH-9 and SRTM DEMs. Remote Sens. Environ. 210, 96–112 (2018).
Wang, Y. et al. Glacier anomaly over the western Kunlun Mountains, Northwestern Tibetan Plateau, since the 1970s. J. Glaciol. 64, 624–636 (2018).
Holzer, N. et al. Four decades of glacier variations at Muztagh Ata (eastern Pamir): a multi-sensor study including Hexagon KH-9 and Pleiades data. Cryosphere 9, 2071–2088 (2015).
Zhou, Y., Li, Z., Li, J., Zhao, R. & Ding, X. Geodetic glacier mass balance (1975–1999) in the central Pamir using the SRTM DEM and KH-9 imagery. J. Glaciol. 65, 309–320 (2019).
von Wissmann, H. & Flohn, H. Today’s Glacierization and Snow Line in High Asia, with Hints on the Glaciation During the Last Ice Age (in German) Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse No. 14 (Akademie der Wissenschaften und der Literatur, 1960).
Kick, W. in Glacier Fluctuations and Climate Change (ed. Oerlemans, J.) 129–142 (Kluwer, 1989).
Archer, D. R. & Fowler, H. J. Spatial and temporal variations in precipitation in the Upper Indus Basin, global teleconnections and hydrological implications. Hydrol. Earth Syst. Sci. 8, 47–61 (2004).
Fowler, H. J. & Archer, D. R. Conflicting signals of climatic change in the upper Indus basin. J. Clim. 19, 4276–4293 (2006).
Yadav, R. R., Park, W.-K., Singh, J. & Dubey, B. Do the western Himalayas defy global warming? Geophys. Res. Lett. 31, L17201 (2004).
Treydte, K. S. et al. The twentieth century was the wettest period in northern Pakistan over the past millennium. Nature 440, 1179–1182 (2006).
Quincey, D. J. et al. Ice velocity and climate variations for Baltoro Glacier, Pakistan. J. Glaciol. 55, 1061–1071 (2009).
Quincey, D. J. et al. Karakoram glacier surge dynamic. Geophys. Res. Lett. 38, L18504 (2011).
Archer, C. L. & Caldeira, K. Historical trends in the jet streams. Geophys. Res. Lett. 35, L08803 (2008).
Finsterwalder, R. The glaciers of Nanga Parbat, glaciological works of the German Himalaya-expedition and their results (in German). Z. Gletsch. Glazialgeol. 25, 57–107 (1937).
Batura Glacier Investigation Group. The Batura Glacier in the Karakoram mountains and its variations. Sci. Sin. 22, 958–974 (1979).
Hewitt, K., Wake, C. P., Young, G. J. & David, C. Hydrological investigations at Biafo Glacier, Karakoram Range, Himalaya; an important source of water for the Indus River. Ann. Glaciol. 13, 103–108 (1989).
Gardner, J. S. & Hewitt, K. A surge of Bualtar Glacier, Karakoram Range, Pakistan: a possible landslide trigger. J. Glaciol. 36, 159–162 (1990).
Wake, C. P. & Searle, M. P. Rapid advance of Pumarikish Glacier, Hispar Glacier Basin, Karakoram Himalaya. J. Glaciol. 39, 204–206 (1993).
Mayer, C., Lambrecht, A., Beló, M., Smiraglia, C. & Diolaiuti, G. Glaciological characteristics of the ablation zone of Baltoro glacier, Karakoram, Pakistan. Ann. Glaciol. 43, 123–131 (2006).
Copland, L. et al. Glacier velocities across the central Karakoram. Ann. Glaciol. 50, 41–49 (2009).
Hewitt, K. Tributary glacier surges: an exceptional concentration at Panmah Glacier, Karakoram Himalaya. J. Glaciol. 53, 181–188 (2007).
Kapnick, S. B., Delworth, T. L., Ashfaq, M., Malyshev, S. & Milly, P. C. D. Snowfall less sensitive to warming in Karakoram than in Himalayas due to a unique seasonal cycle. Nat. Geosci. 7, 834–840 (2014).
Forsythe, N., Fowler, H. J., Li, X.-F., Blenkinsop, S. & Pritchard, D. Karakoram temperature and glacial melt driven by regional atmospheric circulation variability. Nat. Clim. Change 7, 664–670 (2017).
Li, X.-F., Fowler, H. J., Forsythe, N., Blenkinsop, S. & Pritchard, D. The Karakoram/Western Tibetan vortex: seasonal and year-to-year variability. Clim. Dynam. 51, 3883–3906 (2018).
Maussion, F. et al. Precipitation seasonality and variability over the Tibetan Plateau as resolved by the High Asia Reanalysis. J. Clim. 27, 1910–1927 (2013).
Curio, J., Maussion, F. & Scherer, D. A 12-year high-resolution climatology of atmospheric water transport over the Tibetan Plateau. Earth Syst. Dynam. 6, 109–124 (2015).
Cannon, F., Carvalho, L. M. V., Jones, C. & Norris, J. Winter westerly disturbance dynamics and precipitation in the western Himalaya and Karakoram: a wave-tracking approach. Theor. Appl. Climatol. 125, 27–44 (2016).
Cannon, F., Carvalho, L. M. V., Jones, C. & Bookhagen, B. Multi-annual variations in winter westerly disturbance activity affecting the Himalaya. Clim. Dynam. 44, 441–455 (2015).
Norris, J., Carvalho, L. M. V., Jones, C. & Cannon, F. Deciphering the contrasting climatic trends between the central Himalaya and Karakoram with 36 years of WRF simulations. Clim. Dynam. 52, 159–180 (2019).
Mölg, T., Maussion, F. & Scherer, D. Mid-latitude westerlies as a driver of glacier variability in monsoonal High Asia. Nat. Clim. Change 4, 68–73 (2014).
Palazzi, E., von Hardenberg, J. & Provenzale, A. Precipitation in the Hindu-Kush Karakoram Himalaya: observations and future scenarios. J. Geophys. Res. Atmos. 118, 85–100 (2013).
Hasson, S., Böhner, J. & Lucarini, V. Prevailing climatic trends and runoff response from Hindukush-Karakoram-Himalaya, upper Indus Basin. Earth Syst. Dynam. 8, 337–355 (2017).
Asad, F. et al. Are Karakoram temperatures out of phase compared to hemispheric trends? Clim. Dynam. 48, 3381–3390 (2017).
de Kok, R. J., Tuinenburg, O. A., Bonekamp, P. N. J. & Immerzeel, W. W. Irrigation as a potential driver for anomalous glacier behavior in High Mountain Asia. Geophys. Res. Lett. 45, 2047–2054 (2018).
Cook, B. I., Shukla, S. P., Puma, M. J. & Nazarenko, L. S. Irrigation as an historical climate forcing. Clim. Dynam. 44, 1715–1730 (2015).
Bashir, F., Zeng, X., Gupta, H. & Hazenberg, P. A hydrometeorological perspective on the Karakoram anomaly using unique valley-based synoptic weather observations. Geophys. Res. Lett. 44, 10470–10478 (2017).
Lee, E., Sacks, W. J., Chase, T. N. & Foley, J. A. Simulated impacts of irrigation on the atmospheric circulation over Asia. J. Geophys. Res. Atmos. 116, D08114 (2011).
Singh, D. et al. Distinct influences of land cover and land management on seasonal climate. J. Geophys. Res. Atmos. 123, 12017–12039 (2018).
Wang, R., Liu, S., Shangguan, D., Radić, V. & Zhang, Y. Spatial heterogeneity in glacier mass-balance sensitivity across High Mountain Asia. Water 11, 776 (2019).
Sakai, A. & Fujita, K. Contrasting glacier responses to recent climate change in high-mountain Asia. Sci. Rep. 7, 13717 (2017).
Untersteiner, N. Glacial-meteorological analyses in the Karakoram (in German with English abstract). Arch. Meteorol. Geophys. Bioklimatol. Ser. B 8, 1–30 (1957).
Mihalcea, C. et al. Ice ablation and meteorological conditions on the debris-covered area of Baltoro glacier, Karakoram, Pakistan. Ann. Glaciol. 43, 292–300 (2006).
Bonekamp, P. N., de Kok, R. J., Collier, E. & Immerzel, W. W. Contrasting meteorological drivers of the glacier mass balance between the Karakoram and central Himalaya. Front. Earth Sci. 7, 107 (2019).
Hewitt, K. Glaciers of the Karakoram Himalaya (Springer, 2014).
ERA5: Fifth Generation of ECMWF Atmospheric Reanalyses of the Global Climate (Copernicus Climate Change Service, 2017); https://cds.climate.copernicus.eu/cdsapp#!/home
Shea, J. M., Immerzeel, W. W., Wagnon, P., Vincent, C. & Bajracharya, S. Modelling glacier change in the Everest region, Nepal Himalaya. Cryosphere 9, 1105–1128 (2015).
Benn, D. I., Fowler, A. C., Hewitt, I. & Sevestre, H. A general theory of glacier surges. J. Glaciol. 65, 701–716 (2019).
Kääb, A. et al. Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability. Nat. Geosci. 11, 114–120 (2018).
Gilbert, A. et al. Mechanisms leading to the 2016 giant twin glacier collapses, Aru Range, Tibet. Cryosphere 12, 2883–2900 (2018).
Dimri, A. P., Kumar, D., Choudhary, A. & Maharana, P. Future changes over the Himalayas: mean temperature. Glob. Planet. Change 162, 235–251 (2018).
Kraaijenbrink, P., Lutz, A., Bierkens, M. & Immerzeel, W. Impact of a global temperature rise of 1.5 degrees Celsius on Asia’s glaciers. Nature 549, 257–260 (2017).
Quincey, D. et al. The changing water cycle: the need for an integrated assessment of the resilience to changes in water supply in High-Mountain Asia. WIREs Water 5, e1258 (2018).
Dee, D. et al. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Q. J. R. Meteorol. Soc. 137, 553–597 (2011).
Kumar, P. et al. Response of Karakoram-Himalayan glaciers to climate variability and climatic change: a regional climate model assessment. Geophys. Res. Lett. 42, 1818–1825 (2015).
Benn, D. I. et al. Response of debris-covered glaciers in the Mount Everest region to recent warming, and implications for outburst flood hazards. Earth Sci. Rev. 114, 156–174 (2012).
Anderson, L. S. & Anderson, R. S. Modeling debris-covered glaciers: response to steady debris deposition. Cryosphere 10, 1105–1124 (2016).
Harrison, W. D. & Post, A. S. How much do we really know about glacier surging? Ann. Glaciol. 36, 1–6 (2003).
We thank F. Brun for providing the data underlying Fig. 2 and Supplementary Fig. 1, and J. Norris for providing the data for Supplementary Fig. 3.
The authors declare no competing interests.
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Farinotti, D., Immerzeel, W.W., de Kok, R.J. et al. Manifestations and mechanisms of the Karakoram glacier Anomaly. Nat. Geosci. 13, 8–16 (2020). https://doi.org/10.1038/s41561-019-0513-5
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