Rising CO2 levels are not good for grasslands, that’s the result of a four decade study in Montana. Researchers with Montana State University have been studying the same meadow near Bozeman for more than 40 years. They recently published the results of their study in Nature Communications.
The study ran from 1969 to 2012. When it began the concentration of carbon dioxide was at 327 parts per million. 42 years later it had risen by 20% to 402ppm.
So what were the results? Not surprisingly at all, not good. As reported by The Daily Climate, “Dryness over the last several decades is outpacing any potential growth stimulation from increasing atmospheric carbon dioxide and nitrogen deposition,” said Jack Brookshire, one of the study’s co-author. He added, “Our results demonstrate lasting consequences of recent climate change on grassland production.”
One of the big arguments for climate change deniers is that rising CO2 emissions are good for plants. Our own illustrious Senator with the snowball has made that argument several times. He most recently said it earlier this month on the Senate floor. Here’s the video courtesy of Raw Story.
So basically more CO2 makes plants greener. In a way, that’s correct. But when looking at climate change you have take into everything into account…that includes less rainfall. So more CO2 and less rain means less productivity in grasslands.
Maybe next time the Senator with the snowball will bring a clump of grass to the Senate floor to make his case.