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Recent warming across the North Atlantic region may be contributing to an expansion in barley cultivation

Author

Listed:
  • Peter Martin

    (Orkney College UHI)

  • Sigridur Dalmannsdottir

    (Norwegian Institute of Bioeconomy Research)

  • Jens Ivan í Gerdinum

    (The Agricultural Agency, Department of Agricultural Sciences)

  • Hilde Halland

    (Norwegian Institute of Bioeconomy Research)

  • Jónatan Hermannsson

    (Agricultural University of Iceland)

  • Vanessa Kavanagh

    (Forestry and Agrifood)

  • Katrin MacKenzie

    (Biomathematics and Statistics Scotland (BioSS))

  • Ólafur Reykdal

    (Matís)

  • Joanne Russell

    (The James Hutton Institute)

  • Saemundur Sveinsson

    (Agricultural University of Iceland)

  • Mette Thomsen

    (Norwegian Institute of Bioeconomy Research)

  • John Wishart

    (Orkney College UHI)

Abstract

Although grass dominates most agricultural systems in the North Atlantic region (NAR), spring barley is the most important cereal and is used for animal feed and food and drink products. Recent changes in climate have resulted in warmer conditions across the NAR which have major implications for crop production. In this paper, we investigate the thermal requirement of spring barley in the region and use the results to examine the effects of recent trends in temperature and rainfall on barley cultivation, based on 11 regional meteorological sites. At these sites, between 1975 and 2015, we found significant warming trends for several months of the cropping season and significant trends for increases in the cropping season degree days (CSDD). In recent years, this has resulted in an increased proportion of years when the estimated minimum thermal requirement for barley has been met at sites above about 60°N. However, annual variations in CSDD are large and years still occur at these sites where this is insufficient. While warming could potentially allow an earlier start and later end to the cropping season, it is likely that high rainfall at maritime sites, and low rainfall at continental sites, will limit the ability of growers to benefit from this. Warming is considered to have been one of the main factors contributing to the large expansion of the area of barley cultivated in Iceland since the 1990s.

Suggested Citation

  • Peter Martin & Sigridur Dalmannsdottir & Jens Ivan í Gerdinum & Hilde Halland & Jónatan Hermannsson & Vanessa Kavanagh & Katrin MacKenzie & Ólafur Reykdal & Joanne Russell & Saemundur Sveinsson & Mett, 2017. "Recent warming across the North Atlantic region may be contributing to an expansion in barley cultivation," Climatic Change, Springer, vol. 145(3), pages 351-365, December.
    • Handle: RePEc:spr:climat:v:145:y:2017:i:3:d:10.1007_s10584-017-2093-y
    DOI: 10.1007/s10584-017-2093-y
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    References listed on IDEAS

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    1. Eivind Uleberg & Inger Hanssen-Bauer & Bob Oort & Sigridur Dalmannsdottir, 2014. "Impact of climate change on agriculture in Northern Norway and potential strategies for adaptation," Climatic Change, Springer, vol. 122(1), pages 27-39, January.
    2. Unknown, 2000. "Name Index," 2000 Conference, August 13-18, 2000, Berlin, Germany 197276, International Association of Agricultural Economists.
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