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Widespread loss of lake ice around the Northern Hemisphere in a warming world


Ice provides a range of ecosystem services—including fish harvest1, cultural traditions2, transportation3, recreation4 and regulation of the hydrological cycle5—to more than half of the world’s 117 million lakes. One of the earliest observed impacts of climatic warming has been the loss of freshwater ice6, with corresponding climatic and ecological consequences7. However, while trends in ice cover phenology have been widely documented2,6,8,9, a comprehensive large-scale assessment of lake ice loss is absent. Here, using observations from 513 lakes around the Northern Hemisphere, we identify lakes vulnerable to ice-free winters. Our analyses reveal the importance of air temperature, lake depth, elevation and shoreline complexity in governing ice cover. We estimate that 14,800 lakes currently experience intermittent winter ice cover, increasing to 35,300 and 230,400 at 2 and 8 °C, respectively, and impacting up to 394 and 656 million people. Our study illustrates that an extensive loss of lake ice will occur within the next generation, stressing the importance of climate mitigation strategies to preserve ecosystem structure and function, as well as local winter cultural heritage.

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Fig. 1: Significant geomorphological and climatic characteristics classifying lakes that have annual and intermittent winter ice cover.
Fig. 2: Spatial distribution map of current and future Northern Hemisphere lakes that could experience intermittent winter ice cover with climate warming.
Fig. 3: Estimated numbers of lakes, countries and people affected by current and future projected lake ice loss.
Fig. 4: Climate projections for the timing of intermittent winter ice cover for shallow and deep lakes in Wisconsin, USA and Sweden.

Data availability

The ice phenology record, as well as location, mean depth, surface area and elevation data, were sourced from the US National Snow and Ice Data Center Lake and River Ice Phenology database, which was updated through the 2017–2018 winter11. We acquired additional information (shoreline complexity and length, residence time, volume, mean discharge, slope within 100m of the lake shore and watershed area) for each of these lakes from the HydroLAKES database18. We acquired climate information for each lake (mean annual air temperature for 1970–2010) from the CRU30. Data that support the findings of this study are available at


  1. Orru, K., Kangur, K., Kangur, P., Ginter, K. & Kangur, A. Recreational ice fishing on the large Lake Peipsi: socioeconomic importance, variability of ice-cover period, and possible implications for fish stocks. Est. J. Ecol. 63, 282–298 (2014).

    Article  Google Scholar 

  2. Sharma, S. et al. Direct observations of ice seasonality reveal changes in climate over the past 320–570 years. Sci. Rep. 6, 25061 (2016).

    CAS  Article  Google Scholar 

  3. Hori, Y., Cheng, V. Y. S., Gough, W. A., Jien, J. Y. & Tsuji, L. J. S. Implications of projected climate change on winter road systems in Ontario’s Far North, Canada. Clim. Change 148, 109–122 (2018).

    Article  Google Scholar 

  4. Brammer, J., Samson, J. & Humphries, M. M. Declining availability of outdoor skating in Canada. Nat. Clim. Change 5, 2–4 (2014).

    Article  Google Scholar 

  5. Wang, W. et al. Global lake evaporation accelerated by changes in surface energy allocation in a warmer climate. Nat. Geosci. 11, 410–414 (2018).

    CAS  Article  Google Scholar 

  6. Walsh, S. E. et al. Global patterns of lake ice phenology and climate: model simulations and observations. J. Geophys. Res. 103, 28825–28837 (1998).

    Article  Google Scholar 

  7. Brown, L. C. & Duguay, C. R. The response and role of ice cover in lake–climate interactions. Prog. Phys. Geogr. 34, 671–704 (2010).

    Article  Google Scholar 

  8. Magnuson, J. J. et al. Historical trends in lake and river ice cover in the Northern Hemisphere. Science 289, 1743–1746 (2000).

    CAS  Article  Google Scholar 

  9. Weyhenmeyer, G. A. et al. Large geographical differences in the sensitivity of ice-covered lakes and rivers in the Northern Hemisphere to temperature changes. Glob. Change Biol. 17, 268–275 (2011).

    Article  Google Scholar 

  10. Magnuson, J. J. & Lathrop, R. C. Lake ice: winter, beauty, value, changes, and a threatened future. LakeLine 43, 18–27 (2014).

    Google Scholar 

  11. Benson, B. J. et al. Extreme events, trends, and variability in Northern Hemisphere lake-ice phenology (1855–2005). Clim. Change 112, 299–323 (2012).

    Article  Google Scholar 

  12. Leppäranta, M. in The Impact of Climate Change on European Lakes (ed. George, G.) 63–83 (Springer, Dordrecht, 2010).

  13. Nõges, P. & Nõges, T. Weak trends in ice phenology of Estonian large lakes despite significant warming trends. Hydrobiologia 731, 5–18 (2014).

    Article  Google Scholar 

  14. Kirillin, G. et al. Physics of seasonally ice-covered lakes: a review. Aquat. Sci. 74, 659–682 (2012).

    Article  Google Scholar 

  15. Palecki, M. A. & Barry, R. G. Freeze-up of lakes as an index of temperature changes during the transition seasons: a case study for Finland. Am. Meteorol. Soc. 25, 893–902 (1986).

    Google Scholar 

  16. Duguay, C. R. et al. Recent trends in Canadian lake ice cover. Hydrological Proc. 20, 781–801 (2006).

    Article  Google Scholar 

  17. Benson, B. J. & Magnuson, J. J. Global Lake and River Ice Phenology Database (National Snow and Ice Data Center, 2012).

  18. Messager, M. L., Lehner, B., Grill, G., Nedeva, I. & Schmitt, O. Estimating the volume and age of water stored in global lakes using a geo-statistical approach. Nat. Commun. 7, 13603 (2016).

    CAS  Article  Google Scholar 

  19. Screen, J. A. Arctic amplification decreases temperature variance in northern mid- to high-latitudes. Nat. Clim. Change 4, 577–582 (2014).

    Article  Google Scholar 

  20. Xiao, K. et al. Evaporation from a temperate closed-basin lake and its impact on present, past, and future water level. J. Hydrology 561, 59–75 (2018).

    Article  Google Scholar 

  21. Prowse, T. et al. Effects of changes in Arctic lake and river ice. Ambio 40, 63–74 (2011).

    Article  Google Scholar 

  22. National Survey of Fishing, Hunting, and Wildlife-Associated Recreation (US Department of the Interior, US Fish and Wildlife Service, US Department of Commerce & US Census Bureau, 2011).

  23. Guiness World Records Guiness Book of World Records 2008 463 (Bantam Books, New York, 2008).

  24. Moodley, K. Amazing aerial footage shows 100,000 people at China’s ice fishing festival. The Independent (2014).

  25. Hampton, S. E. et al. Ecology under lake ice. Ecol. Lett. 20, 98–111 (2017).

    Article  Google Scholar 

  26. Blank, K., Haberman, J., Haldna, M. & Laugaste, R. Effect of winter conditions on spring nutrient concentrations and plankton in a large shallow Lake Peipsi (Estonia/Russia). Aquat. Ecol. 43, 745–753 (2009).

    CAS  Article  Google Scholar 

  27. Weyhenmeyer, G. A., Westoo, A.-K. & Willen, E. Increasingly ice free winters and their effects on water quality in Sweden’s largest lakes. Hydrobiologia 599, 111–118 (2008).

    CAS  Article  Google Scholar 

  28. Farmer, T. M., Marschall, E. A., Dabrowski, K. & Ludsin, S. A. Short winters threaten temperate fish populations. Nat. Commun. 6, 7724 (2015).

    CAS  Article  Google Scholar 

  29. Carrea, L., Embury, O. & Merchant, C. J. GloboLakes: high-resolution global limnology dataset v1 (Centre for Environmental Data Analysis, 2015);

  30. Harris, I., Jones, P. D., Osborn, T. J. & Lister, D. H. Updated high-resolution grids of monthly climatic observations—the CRU TS3.10 Dataset. Int. J. Climatol. 34, 623–642 (2014).

    Article  Google Scholar 

  31. CIESIN Gridded Population of the World, Version 4 (GPWv4). Population count adjusted to match 2015 revision of UN WPP country totals, Revision 10. NASA SEDAC (2017).

  32. De'ath, G. & Fabricius, K. E. Classification and regression trees: a powerful yet simple technique for ecological data analysis. Ecology 81, 3178–3192 (2000).

    Article  Google Scholar 

  33. O’Reilly, C. M. et al. Rapid and highly variable warming of lake surface water temperatures around the globe. Geophys. Res. Lett. 42, 10773–10781 (2015).

    Article  Google Scholar 

  34. Warren, R., Price, J., Graham, N., Forstenhaeusler, N. & Van Der Wal, J. The projected effect on insects, vertebrates, and plants of limiting global warming to 1.5°C rather than 2°C. Science 360, 791–795 (2018).

    CAS  Article  Google Scholar 

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We are indebted to the numerous data providers who shared and updated their ice phenology records for the National Snow and Ice Data Center Lake and River Ice Phenology database. We thank A. Kuthakumar, T. Sadid and A. Shuvo for gathering lake morphology data from the literature. Funding was provided to S.S. by the Ontario Ministry of Research, Innovation and Science Early Researcher Award, York University Research Chair programme and Natural Sciences and Engineering Research Council of Canada. S.O. was partially supported by funding from the Department of the Interior Northeast Climate Science Center. Most data used in this manuscript are publicly available. The lake ice records were made available through the Long Term Ecological Research Network. In addition, the North Temperate Lakes Long Term Ecological Research (NSF number DEB-1440297) programme provided data, funding and participation support for this project. Any use of trade, firm or product names is for descriptive purposes only and does not imply endorsement by the US Government. This work was supported by the Global Lake Ecological Observatory Network. We thank K. Jankowski for constructive comments that improved the manuscript.

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Authors and Affiliations



S.S. and J.J.M. conceived the idea for the project. S.S. led the project. S.S., K.B., C.M.O., S.O., M.R.M., D.S., G.A.W., L.W. and R.I.W. collected the data. S.S., K.B. and S.O. conducted the data analysis. S.S., K.B., S.O. and C.M.O. drafted the figures and tables. S.S., K.B., C.M.O., S.O., R.D.B., M.R.M., D.S., G.A.W., L.W., R.I.W. and J.J.M. discussed the results, wrote sections of the text, provided critical feedback and commented on drafts of the manuscript.

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Correspondence to Sapna Sharma.

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The authors declare no competing interests.

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Journal peer review information: Nature Climate Change thanks Tiina Noges and Grant Gunn for their contribution to the peer review of this work.

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Supplementary Figures 1–3, Supplementary Tables 1–2

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Sharma, S., Blagrave, K., Magnuson, J.J. et al. Widespread loss of lake ice around the Northern Hemisphere in a warming world. Nat. Clim. Chang. 9, 227–231 (2019).

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