The vulnerabilities of agricultural land and food production to future water scarcity

N. Fitton*, P. Alexander, N. Arnell, B. Bajzelj, K. Calvin, J. Doelman, J.S. Gerber, P. Havlik, T. Hasegawa, M. Herrero, T. Krisztin, H. van Meijl, T. Powell, R. Sands, E. Stehfest, P.C. West, P. Smith

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

Rapidly increasing populations coupled with increased food demand requires either an expansion of agricultural land or sufficient production gains from current resources. However, in a changing world, reduced water availability might undermine improvements in crop and grass productivity and may disproportionately affect different parts of the world. Using multi-model studies, the potential trends, risks and uncertainties to land use and land availability that may arise from reductions in water availability are examined here. In addition, the impacts of different policy interventions on pressures from emerging risks are examined. Results indicate that globally, approximately 11% and 10% of current crop- and grass-lands could be vulnerable to reduction in water availability and may lose some productive capacity, with Africa and the Middle East, China, Europe and Asia particularly at risk. While uncertainties remain, reduction in agricultural land area associated with dietary changes (reduction of food waste and decreased meat consumption) offers the greatest buffer against land loss and food insecurity.

Original languageEnglish
Article number101944
JournalGlobal Environmental Change
Volume58
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • Food security
  • Land use
  • Shared socio-economic pathways
  • Water availability

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  • Datasets

    The percentage of total agricultural area under maize, rice, wheat, vegetables, pulses and fruit production, by country, subject to water scarcity in 2050 as estimated from a multi-model ensemble

    Fitton, N. (Creator), Alexander, P. (Creator), Arnell, N. (Creator), Bajzelj, B. (Creator), Calvin, K. (Creator), Doelman, J. (Creator), Gerber, J. S. (Creator), Havlik, P. (Creator), Hasegawa, T. (Creator), Herrero, M. (Creator), Krisztin, T. (Creator), van meijl, J. C. M. (Creator), Powell, T. (Creator), Sands, R. (Creator), Stehfest, E. (Creator), West, P. C. (Creator) & Smith, P. (Creator), University of Aberdeen, 1 Dec 2020

    Dataset

    Cite this

    Fitton, N., Alexander, P., Arnell, N., Bajzelj, B., Calvin, K., Doelman, J., Gerber, J. S., Havlik, P., Hasegawa, T., Herrero, M., Krisztin, T., van Meijl, H., Powell, T., Sands, R., Stehfest, E., West, P. C., & Smith, P. (2019). The vulnerabilities of agricultural land and food production to future water scarcity. Global Environmental Change, 58, [101944]. https://doi.org/10.1016/j.gloenvcha.2019.101944