Presentation on theme: "Climate Variability and Climate Change: Decision Making under Uncertainty Gerrit Hoogenboom Director, AgWeatherNet & Professor of Agrometeorology Washington."— Presentation transcript:
Climate Variability and Climate Change: Decision Making under Uncertainty Gerrit Hoogenboom Director, AgWeatherNet & Professor of Agrometeorology Washington State University, USA AgMIP–Pakistan Kickoff Workshop & International Seminar on Climate Change University of Agriculture Faisalabad, Pakistan June 4-6, 2013 University of Agriculture Faisalabad, Pakistan June 4-6, 2013
Winter Outlook Weather and Agriculture Weather has an important impact on agriculture, both crop and animal production. For dryland agriculture more than 90% of the variability in yield can be explained by weather conditions.
Winter Outlook Climate and Weather Does a farmer have options to modify or change his production system? If so, what are these options? Can weather and climate information play a role? How do we provide this information?
National Weather Service Cooperative Weather Station Network – Volunteer data collection network – Limited set of data (temperature and rainfall) – Approximately 85 stations in Georgia – Long-term records – Data collected at Griffin Experiment Station since 1926
Georgia Automated Environmental Monitoring Network First weather station was installed in 1991 Air temperature, rainfall, relative humidity, wind speed and direction, solar radiation, soil moisture
Climate in the southeastern USA Why should farmers care?
Deviation from mean severity (%) Field observations (188 fields, 5 seasons) ENSO and Tomato Spotted Wilt Virus (TSWV) severity in peanut (a). Leaf symptoms of TSWV on peanut (b). Western Flower Thrips (vector)
Farmers and Climate: Why models? Traditional agronomic approach: – Experimental trial and error Systems Approach – Computer models – Experimental data Understand Predict Control & Manage – (H. Nix, 1983) Options for adaptive management and risk reduction
Soil ConditionsWeather data Model Simulation Crop Management Genetics Growth Development Yield
Soil ConditionsWeather data Model Simulation Crop Management Genetics Growth Development Yield Net Income Pollution Resource Use
Linkage Between Data and Simulations Model credibility and evaluation Model credibility and evaluation Input data needs: Input data needs: Weather and soil data Weather and soil data Crop Management Crop Management Specific crop and cultivar information Specific crop and cultivar information Economic data Economic data
Observed and simulated soybean yield as a function of seasonal average rainfall (Georgia yield trials)
Observed and simulated soybean yield as a function of average max temperature (Georgia yield trials)
Three representative soil profiles for each county Soil surface data Soil horizons Crop management options: – Crop selection – Variety selection – Planting date – Irrigated versus rainfed – Fertilizer applications Prices and production costs Spatial Data Alabama, Florida and Georgia
Simulations: Cotton Yield Variety “DP555 BG/RR” 9 planting dates, rainfed vs irrigated 38 – 107 years of daily historical weather data
Historical weather data (1900-2005) ENSO Phases Planting dates Soil types Select AL, FL, GA counties Yield Total amount of irrigation No. of irrigation events CSM-CROPGRO Peanut Model April 16, 23 May 1, 8, 15, 22, 29 June 5, 12 Crop Simulations
Interaction & Participation Forecasts, Climatology Web-based DSS www.AgroClimate.org Climate-based Management Options Stand alone Decision Aid Tools Needs for Specific Commodities Crop Models & Climate-based Tools Extension Agents & Specialists Farmers/ Growers Climate in the Southeastern USA: How do farmers make decisions?
Climate Change and Climate Variability The impact of climate change and climate variability on agricultural production and the potential for mitigation and adaptation Future issues can only be studied with simulation models “What-If” type of scenarios
Agriculture and Climate Change Impact and Adaptation Camilla, Mitchell County, Georgia Maximum and Minimum Temperature Precipitation
Maize Yield (kg/ha) Mitchell County, Georgia, USA 4 varieties, 3 soils, rainfed and irrigated Long-term historical weather data
Corn Yield (kg/ha) Agriculture and Climate Change Mitchell County, Georgia, USA 4 varieties, 3 soils, rainfed and irrigated Historical weather GCM-Modified CSIROMK2, Scenario IS92a, 2010-2039
Agricultural Irrigation Water Demand forecast for 2011 to 2050 University of Georgia (UGA) and the State of Georgia Environmental Protection Division Purpose: – Prepare forecasts of irrigation water demand that meet the needs for the agricultural sector of the Georgia economy during the first half of this century.
Model Evaluation DSSAT Version 4.5 Five cropping seasons: 2000-2004 Crop Management : UGA Extension Production Guidelines Field specific water use data: Agricultural Water Pumping (AWP) project
Estimation of Irrigation Amounts Use crop models to simulate irrigation depths for multiple years Weather data : 1950 to 2007 For major producing counties – 3 most important soils on which irrigation occurs – Average planting date for county or region – Estimate daily water application; sum by month Corn and Cotton 88 Peanut and Soybean 66
March April May June July Maize Monthly Irrigation Amounts
““We like to tackle and solve some of the world’s most challenging problems,” Friedberg says, on what’s next for The Climate Corporation beyond insuring farmers, “A farmer is about as analog as it gets. To be able tell a farmer this is what’s going to happen at the end of a season, that’s mind-blowing.” TechCrunch, June 14, 2012 The Climate Corporation
Weather/Climate and Modeling: Crop and Pest Prediction Current WeatherWeather PredictionClimate Prediction Crop/Livestock/Pest/Disease/Irrigation Model Bud BreakFloweringHarvest Maturity Information delivery to producers Social scientists/agronomists/atmospheric scientists & engineers
DSSAT 2014 International Training Program on Crop Modeling May 19-24, 2014 The University of Georgia, Griffin, Georgia, USA
Weather conditions and weather-based decision support tools www.weather.wsu.eduwww.georgiaweather.net Southeast climate information and tools: www.agroclimate.org For crop model information: www.DSSAT.net www.GerritHoogenboom.comGerrit.Hoogenboom@wsu.edu