With the Sahara desert advancing a mile or more a year in places, and rainfall down 30-40% over just a few decades, the UN study said shifts in climatic patterns threatened to trigger a succession of new wars across Africa.
This much warming, the experts say, would bring rising seas, more severe droughts, rainstorms, heat waves and floods, along with broad shifts in climatic and agricultural zones that would benefit some regions but seriously harm others.
Recent increased water withdrawal from HD and adverse shifts in climatic trends, i.e., decrease rainfall and warming trends were also associated with worsening catchment's salinity.
Significant temporal variation in the carbonate δ18O values records variation of local precipitation and supports the shifts in climatic conditions interpreted from the lithologic record.
Our estimates of the age of Australian chenopod lineages based on three alternative fossils were made independently from any knowledge about shifts in climatic and geographical conditions in Australia during the times of arrival.
Results of this study indicate that choice of model threshold and CO2 emissions scenario affect short-term projected shifts in climatic distributions of species; however, these factors and choice of global circulation model have relatively small affects on what is significant projected loss of habitat for many salamander species that currently occupy the Appalachian Highlands.
Further, climate change itself will negatively affect global food yields, costs, and accessibility as farming, fisheries, and agricultural production are affected by long-term shifts in climatic and environmental conditions and increased adverse weather events (McMichael and Lindgren 2011).
However, evidence for rapid shifts in climatic preferences among species also exists [ 15, 16] and macro-evolutionary modeling should be used to characterize the processes driving the evolution of ecological niches [ 17].
