Water rights shape crop yield and revenue volatility tradeoffs for adaptation in snow dependent systems

Keyvan Malek (), Patrick Reed, Jennifer Adam, Tina Karimi and Michael Brady
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Keyvan Malek: Cornell University
Patrick Reed: Cornell University
Jennifer Adam: Washington State University
Tina Karimi: Cornell University
Michael Brady: Washington State University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Irrigated agriculture in snow-dependent regions contributes significantly to global food production. This study quantifies the impacts of climate change on irrigated agriculture in the snow-dependent Yakima River Basin (YRB) in the Pacific Northwest United States. Here we show that increasingly severe droughts and temperature driven reductions in growing season significantly reduces expected annual agricultural productivity. The overall reduction in mean annual productivity also dampens interannual yield variability, limiting yield-driven revenue fluctuations. Our findings show that farmers who adapt to climate change by planting improved crop varieties may potentially increase their expected mean annaul productivity in an altered climate, but remain strongly vulnerable to irrigation water shortages that substantially increase interannual yield variability (i.e., increasing revenue volatility). Our results underscore the importance for crop adaptation strategies to simultaneously capture the biophysical effects of warming as well as the institutional controls on water availability.

Date: 2020
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DOI: 10.1038/s41467-020-17219-z

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