- Colin Kelley and coworkers report on
the worst drought in recorded history in
and neighboring countries just prior to the “Arab Spring”. The drought was serious enough that large numbers of farmers left their villages and migrated to Syria ’s cities. This caused major social and political turmoil and is considered to be a contributing factor to Syria ’s civil war. Human-derived greenhouse gases contributed to the drought. Syria
- Moore and Lobell analyze changes in
crop yields and climate change across
Europe. Large scale decreases in yields were found in many localized regions, which correlated with increased temperatures and decreased precipitation over the 20 year period studied.
- Diffenbaugh and coworkers examine the
recent drought in
, likely the worst in 1000 years. By simulating the region’s climate in model calculations the authors find that the extra amount of greenhouse gases added by human activity likely resulted in higher temperatures and reduced precipitation in the region. This factor also contributes to a high risk of continued severe droughts. California
- Cook and coworkers assess drought conditions in the American Southwest and Central Plains. Assuming that unrestrained emission of greenhouse gases will continue, the risk of severe droughts in these regions is projected to be extremely high, by various measures between about 69% and 97% in the second half of this century.