By Paul Homewood
Second in the Climate Glance series.
There have been comments about the lack of detail and references, but there is a balance that needs to be struck between detail and readability to the wider public, who have no interest in the detail.
As Heartland note:
Climate At A Glance puts frequently argued climate issues into short, concise, summaries that provide the most important, accurate, powerful information. The summaries are designed to provide a library of solid yet simple rebuttals so that legislators, teachers, students, and laymen can easily refute the exaggerations of the so-called “climate crisis.”
Facts, data, and perspectives are presented that put media scares in proper perspective
Today’s topic tackles the common misconception that global warming is reducing crop yields, and includes full references to the data quoted.
There is also a video link to the Heartland conference, where this topic is explored in more detail.
Bullet Point Summary:
- As our planet gradually warms, global crop yields and crop yields across the planet are setting new records almost every year.
- U.S. crop yields continue to grow, setting new records nearly every year.
- Longer growing seasons, higher temperatures, and more atmospheric carbon dioxide are creating ideal crop conditions.
Short Summary: As global climate modestly warms, U.S. and global crop yields are setting new records almost every year. The same is true for nearly all other nations, too. Thanks in large part to longer growing seasons, fewer frost events, more precipitation, and the fertilization effect of atmospheric carbon dioxide, farmers are producing more food on less land, allowing them to feed a growing global population.
Crop Production Facts: The 2019 global crop year brought record production of the important cereal crops; corn, wheat, and rice. This builds on previous records set nearly every year during the past decade. Almost every important U.S. crop has set record yields per acre during the past three years (latest data for when this summary went to press in February 2020), with most of the top 10 years in yields-per-acre occurring during the past decade. For example, each of the three record-high corn yields have occurred during the past three years. Each of the five record-high rice yields have occurred during the past five years. Each of the past nine years have produced top-10 all-time wheat yields.
How Global Warming Benefits Crop Production: Global warming lengthens growing seasons, reduces frost events, and makes more land conducive for crop production. Global soil moisture has maintained pace or modestly improved as global temperatures have risen modestly, with greater oceanic evaporation leading to more global precipitation, especially during summer and fall crop seasons. Further, carbon dioxide greatly benefits crop production, as atmospheric carbon dioxide works as aerial fertilizer. Higher atmospheric carbon dioxide levels assist plant growth and resistance to drought and heat. It is for this reason that greenhouses often pump in elevated amounts of carbon dioxide.
Source: U.N. Food and Agriculture Organization: http://www.fao.org/worldfoodsituation/csdb/en/.
More Information: Crop yields in
nearly every country are growing, with many frequently
setting new records.
See the 19min mark and onward in the video linked above. The video is The Heartland Institute’s rebuttal to the United Nations’ 2019 Civil Society Conference.
via NOT A LOT OF PEOPLE KNOW THAT
March 23, 2020 at 06:15AM