5.2.2. At the global scale, (2018) climate change between 1981 and 2010 has decreased global mean yields of maize,
wheat, and soybeans by 4.1, 1.8 and 4.5%, respectively, relative to preindustrial climate. For rice, no significant
impacts were detected.
This suggests that climate change has
modulated recent yields on the global scale and led to production losses, and that adaptations to date have not been sufficient to offset the negative impacts of climate change, particularly at lower latitudes.
Ch. 4 Land Degradation
...occurs over a quarter of the Earth’s
ice-free land area
Soil loss from conventionally tilled land exceeds the rate
of soil formation by >2 orders of magnitude
Climate change exacerbates the rate and magnitude of
several ongoing land degradation processes and introduces
new degradation patterns (high confidence)
Global warming beyond
present day will further exacerbate ongoing land degradation processes through increasing floods, drought frequency and severity, intensified cyclones, and sea level rise
EXPERT MEETING ON CLIMATE CHANGE, LAND USE AND FOOD SECURITY,