Now a new NOAA study in the Journal of Climate warns that in the already warm and frequently dry southern Great Plains and Southwest, climate change will make these “hot droughts” significantly hotter - and longer - than they used to be. Droughts are recurrent, disruptive weather events whose impacts are often compounded by extreme and prolonged heat waves. Together with huge forest fires, an extraordinary heat wave with record temperatures led to a high and long-lasting air pollution in western Russia in 2010. "For most of the country, summer is the most favorable time of year for 'flash droughts' to develop, which is when drought conditions quickly develop during a period of hot, dry weather," Donegan said.The NOAA researchers cautioned that their results are based on a single climate model, and said more comparisons and research should be done on how climate change and frequent, intense droughts influence human health, water supply and agricultural productivity.“We need to better understand drought-heat wave interactions because of the risk that these events may become especially severe in regions that are already water-short,” said Hoerling.We recognize our responsibility to use data and technology for good. Only with the inclusion of human influences can computer models of the climate reproduce the observed changes. The drought in 2011-2012 was reported to be one of the most severe ever recorded in the United States, with an economic loss of billions of dollars and heavy crop failures. "Drought is recurrent, although it doesn't necessarily happen in regular intervals, because it's highly dependent on precipitation patterns," weather.com meteorologist Brian Donegan said. Over the past decade, however, the number of new record highs recorded each year has been twice the number of new record lows, a signature of a warming climate, and a clear example of its impact on extreme weather.NOAA’s National Climatic Data Center reports that from January 1 – June 18 of 2012 new high temperature records outnumbered cold records across the United States by nearly 10:1. Now a new NOAA study in the Journal of Climate warns that in the already warm and frequently dry southern Great Plains and Southwest, climate change will make these “hot droughts” significantly hotter - and longer - than they used … The consequences of drought and extreme heat are more devastating and dangerous than they may first appear Heat and dry weather — An explosive combination Agriculture and forestry are not the only areas to feel the impact of heatwaves and droughts. Montana and Wyoming will have almost 30 days of heat waves in 2030, compared to 10 in 2000.
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A drought can make a hot day hotter, while a heat wave can make dry conditions even drier. Atmospheric circulation variability, El Niños and La Niñas, and many other phenomena are involved in determining which regions will experience extremes in any given year.A small change in average global temperature leads to a dramatic change in the frequency of extreme events.Moderate weather events are much more common than extreme events. In contrast, the balance shifts in a warming climate, and on average more new records highs than new record lows are set over any time period. How do the resulting carbon cycle changes in turn affect the climate?These questions will be discussed during the international “Open Science Conference on Climate Extremes and Biogeochemical Cycles in the Terrestrial Biosphere: impacts and feedbacks across scales” in Seefeld, Austria, from 2nd to 5th April 2013, hosted by the University of Innsbruck. 2007 Scientists know, for example, that atmospheric moisture plays an important role in heat waves. This story does not necessarily represent the position of our parent company, IBM. "Persistent periods of wet weather, like much of the United States has seen over the last year, make it more difficult for drought to develop because soils are saturated. They tend to occur more frequently in dry conditions with low humidity, but heat waves in high humidity can take their toll on the population, livestock, and wildlife.
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