George Paul, P. V. Vara Prasad, Scott A. Staggenborg, and Prasanna H.Gowda Kansas State University; and CPRL USDA ARS, Bushland, Texas
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1 Assessing Impact of Climate Change and Variability and on Crop Production in Ogallala Region Using Regional Climate Data George Paul, P. V. Vara Prasad, Scott A. Staggenborg, and Prasanna H.Gowda Kansas State University; and CPRL USDA ARS, Bushland, Texas
2 Introduction The Ogallala Aquifer Region consisting of 232 counties spread over 8 states of Conterminous United States is facing declining water levels and deteriorating water quality. Coupled with, is the climate change, largely affecting the productivity of crop and water availability.
3 Objectives 1. To analyze the climate variability and change across the Ogallala region 2. To quantify the impact of climate change on the agricultural production in the Ogallala region 3. Analyze influence of various Crop Management Decision and Genetic Traits as adaptation / mitigation options for coping with climate variability and change.
4 Work flow and Significant features of the study The three regional climate models (RCM) used in this study were Canadian RCM, Italian RCM and the Hadley RCM (UK) The A2 climate scenario data for historic period ( ) and future ( ) were acquired from North American Regional Climate Change Assessment Program (NARCCAP). Observed baseline climate data ( ) were used for validation.
5 Work flow and Significant features of the study Spatial crop modeling was performed in AEGIS/WIN, a GIS interface available in DSSAT (Decision Support System for Agrotechnology Transfer) software suite. CERES-Sorghum and CERES-Wheat were used to simulate phenology, growth and grain yield. Management, genetic advancements (changes) and effects of elevated CO 2 were incorporated as part of future model runs and crop simulations were conducted under irrigated and rainfed conditions.
6 Maximum Temperature ( C) Climate Change: Increased temperatures over the past 30 years Jan-68 Jul-69 Jan-71 Jul-72 Jan-74 Jul-75 Jan-77 Jul-78 Jan-80 Jul-81 Jan-83 Jul-84 Jan-86 Jul-87 Jan-89 Jul-90 Jan-92 Jul-93 Jan-95 Jul-96 Jan-98 Maximum Temperature ( C) Jan-68 Aug-69 Mar-71 Oct-72 May-74 Nov-75 Jun-77 Jan-79 Aug-80 Mar-82 Oct-83 May-85 Nov-86 Jun-88 Jan-90 Aug-91 Mar-93 Oct-94 May-96 Nov y = x y = x Month Month Lubbock, Texas Goshen, Wyoming
7 The A2 climate scenario
8 Maximum Temperature ( C) Climate Change: Model uncertainties and temporal variability: Lubbock, Texas Maximum Temperature ( C) HRM RCM CRM HRM RCM CRM Observed Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month 5 0 Jan Feb Mar Apr May Jun Month Jul Aug Sep Oct Nov Dec Future Predicted Climate Past Predicted and Observed Climate
9 Minimum Temperature ( C) Climate Change: Model uncertainties and temporal variability : Lubbock, Texas Minimum Temperature ( C) HRM RCM CRM HRM RCM CRM Observed Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Future Predicted Climate Month Past Predicted and Observed Climate
10 Precipitation (mm) Climate Change: Model uncertainties and temporal variability : Lubbock, Texas Precipitation (mm) HRM RCM CRM HRM RCM CRM Observed Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Future Predicted Climate Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Past Predicted and Observed Climate
11 Climate Change: Spatial Variability: Max Temp Change in Maximum Temperature ( C) from Baseline Climate for the month of July as predicted by HRM
12 Climate Change: Spatial Variability: Min Temp Change in Minimum Temperature from Baseline Climate for the month of July as predicted by HRM
13 Climate Change: Spatial Variability: Precipitation Change in Precipitation from Baseline Climate for the month of July as predicted by HRM
14 Crop model Inputs DSSAT CERES Wheat Model Winter Wheat Soil Ulysses silt loam Cultivar Newton Plant Population 1,779,535 plants/ha Planting Date October 1
15 Wheat Irrigated
16 Wheat Dryland
17 Crop Model Inputs DSSAT CERES - Sorghum Grain Sorghum Soil Ulysses silt loam Cultivar Pioneer 8333 Plant Population 160,000 plants/ha Planting Date June 1
18 Sorghum Irrigated
19 Sorghum Dryland
20 Sorghum Dryland, Cultivar change Short duration to Long duration (30 d increase)
21 Sorghum Dryland, Planting Date Change Early Planting (30 d)
22 Comprehensive Change Genetics, Management and Climate (Grain Sorghum) 30 years simulations Genetic Traits Ranges Initial Value Final Value Yield change range (%) Avg. yield change (%) Thermal time grain filling to maturity (P5) Partitioning to panicle (G2) Phylochron interval (PHINT) Relative leaf size (G1) Management Cultivar duration Planting date May - July June May Carbon dioxide Climate Change (Temp) 4-6 base line to -40
23 Conclusions 1. Climate models (A2 scenario) suggest increases in temperature and highly variable rainfall distribution 2. Distinct variations in the three climate models suggest inherent uncertainty in predictions 3. Changes in climate will influence crop productivity 4. Genetics and crop management decisions can help manage/mitigate yield losses 5. Agricultural production in the Ogallala region would be highly susceptible to the future climates and therefore requires appropriate mitigation/adaptation strategies
24 Acknowledgements Colleagues at Crop Physiology Lab, Kansas State University North American Regional Climate Change Assessment Program (NARCCAP) for providing the data This research was supported in part by the Ogallala Aquifer Program, a consortium between USDA-Agricultural Research Service, Kansas State University, Texas AgriLife Research, Texas AgriLife Extension Service,TexasTech University andwesttexas A&M University.
25 QUESTIONS?????????
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