Iowa Public Television


Temperatures Rising

posted on April 18, 2003

Warming of farmland may not be global.

A University of Alabama researcher says the rising temperatures in the California San Joaquin Valley may be caused not by global warming, but by irrigation.

Nighttime temperatures in the study's six-county region have risen more than four degrees over seven decades.

The study's data of two-million irrigated acres conflicts with global warming theories suggesting carbon dioxide is the cause of rising temperatures.

The researcher says if the climate change were caused by carbon dioxide, it would affect the entire valley and changes have not been seen in the higher elevations.

Tags: agriculture California climate change global warming news weather