Start Date

18-11-1997 12:00 AM

Description

Corn production throughout the Midwest has been variable during the last 3 decades after a fairly stable time which extended from the late 1950's through 1973. The stable period was described by Carlson (1990) and Baker et al. (1993), and others. Historically, corn production also varied before that time, but with yield levels at a lower potential. Some of this year-to-year yield variation has been apparently caused by the Southern Oscillation (SO) (Carlson et al. 1996) or sea surface temperature variation (Handler, 1984 and Thompson, 1990). The SO is closely related to El Nino and La Nina conditions (anomolusly warm and cold sea surface temperatures in the Equatorial Pacific, respectively). An excellent general reference for this is given by Diaz and Markgraf ( 1992). Weather impacts of these phenomena throughout the world are detailed by Ropelewski and Halpert (1986, 1987). Other information regarding these topics and crop yields are given by Carlson et al. (1996).

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Nov 18th, 12:00 AM

Weather and Yield Variation in the Midwest: So, Sunspots, or What?

Corn production throughout the Midwest has been variable during the last 3 decades after a fairly stable time which extended from the late 1950's through 1973. The stable period was described by Carlson (1990) and Baker et al. (1993), and others. Historically, corn production also varied before that time, but with yield levels at a lower potential. Some of this year-to-year yield variation has been apparently caused by the Southern Oscillation (SO) (Carlson et al. 1996) or sea surface temperature variation (Handler, 1984 and Thompson, 1990). The SO is closely related to El Nino and La Nina conditions (anomolusly warm and cold sea surface temperatures in the Equatorial Pacific, respectively). An excellent general reference for this is given by Diaz and Markgraf ( 1992). Weather impacts of these phenomena throughout the world are detailed by Ropelewski and Halpert (1986, 1987). Other information regarding these topics and crop yields are given by Carlson et al. (1996).

 

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