
Preparing Farmers for Possible Longer-Term
Weather Forecasts in FutureBy Don Comis December 8 1999Forecasts based on the El
Niño-Southern Oscillation phenomenon might help farmers manage
cold-weather crops like winter wheat. After analyzing 103 years of climate data,
Agricultural Research Service scientists
found evidence of higher winter wheat yields during El Niño's cool, wet
winters and lower yields during La Niña's warm, dry winters. The current
La Niña that began in the spring of 1998 suggests an increased
probability of warm and dry conditions over the winter wheat belt in the coming
months. The existence of this and other persistent and possibly predictable climate
mechanisms lead some to believe that interseasonal climate prediction may be
possible under certain circumstances. So, ARS atmospheric scientist Steven A. Mauget and soil physicist Dan R.
Upchurch are studying if, where and how such predictions might be used by
farmers. Mauget and Upchurch are in the ARS Wind Erosion and Water Conservation
Unit at Lubbock, Tex. ARS is the chief research agency of the
U.S. Department of Agriculture. These mechanisms are usually rooted in sea-surface temperature variability,
so Mauget and Upchurch have turned to the ocean. They plan to search ocean temperature and air pressure records over the past
century for clues to 12- and 20-year rainfall cycles observed over the Midwest.
They want to see if they can isolate the source and test to see if the cycles
are predictable. Finally, they'll test how farmers might best use the forecasts, using
computer simulations to track a farming career with and without seasonal
forecasts. An article about the research appears in a special December Millennium
edition of ARS' Agricultural
Research magazine. Click
here to
read the article online. Scientific contact: Steven A. Mauget, ARS Wind Erosion and Water
Conservation Unit, Lubbock, TX, phone (806) 749-5560, fax (806) 723-5272,
[email protected]. U.S. Department of Agriculture | |