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The ICARDA Agro-Climate Tool (hereafter 'the application') is a Visual Basic (6) program that can be run on Windows 98, 2000, and XP operating systems. It should be installed on a PC with a Pentium III or better microprocessor and at least 230 Mbytes of available hard disk space. Monitor screen resolution should be at least 1024 X 768 pixels but no more than 1920 X 1440 pixels. Once installed (download here), instructions for the application's use can be found by left single-clicking on 'Instructions'on the application's upper left corner.
The application's primary daily variables (daily minimum temperature, daily maximum temperature, precipitation) were generated by modified GEM6 (Hanson, et al., 1994)weather generator code. Secondary variables (daily dew point temperature, short-wave surface radiation, net outgoing long-wave radiation, and reference grass evapotranspiration) were derived from primary variables using algorithms drawn from the FAO's 'Guidelines for Computing Crop Water Requirements' (Allen et al., 1998). Crop evapotranspiration values were then derived from the reference grass ET values using the FAO-56 single crop coefficient method.
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| Bibliography |
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Allen, R.G., Pereira, L.S., Raes, D., and Smith,M. 1998 Crop Evapotranspiration: Guidelines for computing crop water requirements. FAO Irrig. and Drain. Paper No. 56, Food and Agriculture Organization of the United Nations, Rome, Italy. 300p. |
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Hanson, C.L., Cummings, A., Woolhiser, D.A., and Richardson, C.W. 1994. Microcomputer program for daily weather simulation in the contiguous United States. U.S. Department of Agriculture, Agricultural Research Service, ARS-114.
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