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Title: The Role of Climate Covariability on Crop Yields in the Conterminous United States

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep33160· OSTI ID:1357048
 [1];  [1];  [2];  [1];  [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Joint Global Change Research Inst.
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Atmospheric Sciences & Global Change Division

The covariability of temperature (T), precipitation (P) and radiation (R) is an important aspect in understanding the climate influence on crop yields. Here in this paper, we analyze county-level corn and soybean yields and observed climate for the period 1983–2012 to understand how growing-season (June, July and August) mean T, P and R influence crop yields jointly and in isolation across the CONterminous United States (CONUS). Results show that nationally averaged corn and soybean yields exhibit large interannual variability of 21% and 22%, of which 35% and 32% can be significantly explained by T and P, respectively. By including R, an additional of 5% in variability can be explained for both crops. Using partial regression analyses, we find that studies that ignore the covariability among T, P, and R can substantially overestimate the sensitivity of crop yields to a single climate factor at the county scale. Further analyses indicate large spatial variation in the relative contributions of different climate variables to the variability of historical corn and soybean yields. Finally, the structure of the dominant climate factors did not change substantially over 1983–2012, confirming the robustness of the findings, which have important implications for crop yield prediction and crop model validations.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1357048
Report Number(s):
PNNL-SA-116570; PII: BFsrep33160
Journal Information:
Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (8)

Land suitability levels for rainfed maize under current conditions and climate change projections in Mexico journal May 2018
Improving Site-Specific Maize Yield Estimation by Integrating Satellite Multispectral Data into a Crop Model journal November 2019
Interactions between temperature and drought in global and regional crop yield variability during 1961-2014 journal May 2017
Crop yield response to climate change varies with crop spatial distribution pattern journal May 2017
Climate-Driven Crop Yield and Yield Variability and Climate Change Impacts on the U.S. Great Plains Agricultural Production journal February 2018
When Will Current Climate Extremes Affecting Maize Production Become the Norm? journal February 2019
Spatial-Temporal Variation of Drought in China from 1982 to 2010 Based on a modified Temperature Vegetation Drought Index (mTVDI) journal December 2017
Weed Diversity Affects Soybean and Maize Yield in a Long Term Experiment in Michigan, USA journal February 2017

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