There have been a couple posts here about this study, which infer that climate change is reducing crop yields, when crop yields have been going in the oppositeMessage 1 of 2 , May 10, 2011View SourceThere have been a couple posts here about this study, which infer that climate change is reducing crop yields, when crop yields have been going in the opposite direction for decades. What these posts gloss over is that crop yields have tripled since 1950, as admitted in the article. According to the study, rice and soybeans were unaffected by climate change, while wheat and corn yields were 2% to 4% less (after accounting for the positive impact of added CO2 on plant yields). That is in comparison to the 300% increase in crop yields that has been going on since CO2 started rising! One has to wonder how much of that increase was, in fact, due to higher atmospheric concentrations of CO2.
The real story is that the impact of climate change is that instead of a 200% increase in crop productivity, we could have had marginally greater crop yields (excluding rice and soybeans) without global warming. Regardless of whether most of the warming is natural or anthropogenic, it does not seem to be a very strong argument for trying to control a naturally occurring atmospheric compound that is essential for life and beneficial for food production.
--- In ClimateConcern@yahoogroups.com, "HappyChopperRecords" <happychopperrecords@...> wrote:
> Agricultural areas have been warming overall, reducing harvests from what they would have been otherwise and encouraging more rapid adaptation, says Columbia University's Wolfram Schlenker. Read more at: http://wp.me/pLahN-x8