Drought Trends Across the Western United States

By | March 7, 2013

 

drought_trends_western_us

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[Illustrations, footnotes and references available in PDF version]

Climate alarmists contend that rising global temperatures lead to more severe and longer-lasting droughts on the basis of projections of global climate change produced by mathematical models that are primarily driven by increases in the atmosphere’s CO2 concentration; and with respect to the western United States, there has been growing interest in understanding drought in that part of the country in light of the pronounced impact it has had there in recent decades. Therefore, many scientists have conducted research to attempt to better understand the characteristics of historic hydrologic variability in this important region, so that a more proper evaluation can be made of how unusual, unnatural or unprecedented droughts of the recent past have been, which droughts climate alarmists typically claim have been made worse – or even been entirely caused – by CO2-induced global warming. In the following pages, this claim is evaluated by reviewing what scientists have learned in this regard from various studies that have examined historic droughts across the western United States, organizing our review into several sub-domains within the overall region of study.