Making NOAA climate forecasts useful to farmers

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Meteorologist Jeanne Schneider, hydraulic engineer Jurgen Garbrecht and hydrologist John Zhang at the USDA-Agricultural Research Service Great Plains Agroclimate and Natural Resources Research Unit in El Reno, Okla., are working with the National Oceanic and Atmospheric Administration (NOAA) to translate seasonal climate forecasts into possible daily weather outcomes.

Currently, NOAA forecasts are seldom used in agriculture. One problem is that they cover too large an area for direct agricultural application.

Schneider found that NOAA’s predictions of periods of above-average temperatures were accurate enough to be possibly useful for agriculture over most of the lower 48 states. However, currently available forecasts for cooler-than-average temperatures are generally too unreliable for many uses anywhere in the country.

Forecasts for wetter- or drier-than-average conditions are mostly useful in only about 10 percent of the lower 48 states. In these regions, seasonal precipitation predictions may assist crop insurance programs and other agricultural enterprises that operate at regional scales.

Garbrecht, Schneider and Zhang are developing computer models for climate-related decision support. Schneider developed new methods to downscale seasonal forecasts to the farm scale and express them in one-month increments. Garbrecht modified an ARS-developed software program to generate daily weather outcomes corresponding to these monthly climate forecasts. And Zhang developed a winter wheat grazing model to assess potential impacts of the seasonal forecasts on forage, beef and grain production.

Forecast methodologies are improving rapidly, spurring major advances in NOAA forecasting.

Demonstrations of specific agricultural applications in regions that can currently benefit from forecasts should help spur wider use elsewhere as forecasts improve.

Source: USDA-ARS



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