Increase of CO2 and Climate Change Effects on Iowa Soybean Yield, Simulated Using GLYCIM

• DOI: 10.2134/agronj1997.00021962008900020004x
• Publication Date: 2010-07-28T22:53:58Z
• Authors: Jonathan D. Haskett; Yakov A. Pachepsky; Basil Acock
• Keywords: 2. Zero hunger; 13. Climate action; 15. Life on land; 01 natural sciences; 0105 earth and related environmental sciences

Abstract Increases in atmospheric CO 2 concentration are likely to have a significant impact on the climate and affect growth development of crops. The effect change crops has be assessed for large areas provide information global estimates regional strategy development. In this study, computer simulations were done using soybean [ Glycine max (L.) Merr.] crop model GLYCIM assess effects these changes yields state Iowa. ability accurately predict was tested by comparing results with curve fit yield response derived from measured data. To simulate change, we used projected monthly weather variables ambient increased three general circulation models (GCMs): Goddard Institute Space Studies (GISS), Geophysical Fluid Dynamics Laboratory (GFDL), United Kingdom Meteorological Office (UKMO). converted daily nine reporting districts (CRDs) Iowa, without increases . When simulated increasing levels (baseline 350, 450, 550, 650 µL L −1 ), increased. Without , remained essentially constant GFDL GISS scenarios, while decreasing 10% UKMO scenario. variability among CRDs all scenarios as changed Overall, did not substantially alter yields. increase atmosphere primary determinant response.