2012 United States drought

2012 United States drought
Name	2012 United States drought
Duration	2012
Location	United States

2012 United States drought was a severe and widespread drought that affected much of the United States during 2012, producing extreme agricultural losses, water shortages, and significant economic disruption. The event intersected with climatic patterns tied to the North Atlantic Oscillation, Pacific Decadal Oscillation, and episodes of altered atmospheric circulation observed by agencies such as the National Oceanic and Atmospheric Administration and National Aeronautics and Space Administration. Federal, state, and local responses involved institutions including the United States Department of Agriculture, Federal Emergency Management Agency, and state governments across the Midwestern United States, Great Plains, and Southeastern United States.

Background and causes

Persistent blocking ridges and anomalous jet stream behavior linked to phases of the Arctic oscillation and shifts in the Pacific North American pattern contributed to reduced precipitation over the central United States in 2012. Sea surface temperature anomalies associated with the El Niño–Southern Oscillation and multidecadal variability such as the Atlantic Multidecadal Oscillation and Pacific Decadal Oscillation modulated moisture transport from the Gulf of Mexico and influenced storm tracks that normally bring precipitation to the Corn Belt, Wheat Belt, and Cattle Country. Land-atmosphere feedbacks, informed by research from the National Center for Atmospheric Research and Princeton University, intensified soil moisture deficits, increasing surface sensible heat flux and reinforcing the heat and drought through positive feedback documented by the Intergovernmental Panel on Climate Change. Agricultural practices and irrigation reliance in regions served by water projects such as the Ogallala Aquifer and Hoover Dam altered vulnerability.

Geographic extent and timeline

The drought expanded rapidly during spring and summer 2012, affecting large portions of the Midwest, including Iowa, Illinois, Indiana, Ohio, and Missouri, and extending westward into the Great Plains states such as Kansas, Nebraska, Oklahoma, and Texas. Significant severity was measured by the United States Drought Monitor and corroborated by analyses from the National Climatic Data Center and European Centre for Medium-Range Weather Forecasts reanalyses. By mid-2012, large swathes of Colorado, New Mexico, and Wyoming also experienced abnormal dryness, while the Southeastern United States — including Georgia and Florida — registered drought impacts in the autumn. The timeline featured an early-summer heat wave that produced record-high temperatures in cities such as Chicago, Dallas, and Indianapolis, with climatological records maintained by the National Weather Service.

Impacts on agriculture and economy

Crop failures and reduced yields in the Corn Belt and Soybean Belt led the United States Department of Agriculture to declare numerous disaster counties, invoking assistance programs administered by the Farm Service Agency and Risk Management Agency. The 2012 episode produced sharp rises in global cereal prices monitored by the Food and Agriculture Organization of the United Nations and affected commodity markets on exchanges including the Chicago Board of Trade and New York Mercantile Exchange. Livestock producers faced higher feed costs, impacting operations in states such as Nebraska and Kansas; agricultural losses were estimated by analyses from the Congressional Research Service and economic modeling groups including the USDA Economic Research Service. Secondary effects reached food-processing companies headquartered in Chicago, transportation firms operating on the Mississippi River, and export logistics tied to ports such as New Orleans and Long Beach, California.

Environmental and hydrological effects

River low flows and reservoir drawdowns affected navigation on the Mississippi River and tributaries, altering barge traffic monitored by the United States Army Corps of Engineers and prompting modifications to operations at facilities like Eads Bridge and locks on the Missouri River. Groundwater depletion in regions accessing the Ogallala Aquifer intensified concerns raised by researchers at Texas A&M University and Colorado State University, while wildfire risk increased across affected landscapes leading to major incidents near Denver and the Black Hills. Ecosystems in the Mississippi Alluvial Plain and riparian corridors experienced stress on species managed by the United States Fish and Wildlife Service, and water quality concerns such as increased concentration of pollutants were tracked by the Environmental Protection Agency.

Government and policy response

Federal declarations of disaster and emergency relief leveraged programs from the United States Department of Agriculture and financial mechanisms reviewed by the Congressional Budget Office; Congress considered supplemental appropriations and debated policy responses involving the Farm Bill framework and crop insurance subsidies administered through the Federal Crop Insurance Corporation. State governors in affected states, including the governor of Texas and the governor of Iowa, issued proclamations and coordinated with the Federal Emergency Management Agency and state departments of agriculture to distribute aid and implement water restrictions. Policy discussions involved stakeholders such as the American Farm Bureau Federation, National Corn Growers Association, and energy-sector actors including the Edison Electric Institute regarding impacts on biofuel production and fuel markets.

Recovery and long-term consequences

Recovery trajectories varied by region, with some areas of the Midwest receiving relief in late 2012 and into 2013 as precipitation patterns normalized under influence of seasonal variability tracked by the National Oceanic and Atmospheric Administration. Longer-term consequences prompted renewed research into climate resilience led by institutions such as the University of Illinois Urbana-Champaign, Iowa State University, and the Scripps Institution of Oceanography, and policy adaptations addressing irrigation efficiency, crop insurance reform, and water-resource planning involving agencies like the Bureau of Reclamation and state water authorities. The 2012 drought influenced subsequent discussions at venues including the United Nations Framework Convention on Climate Change meetings and informed assessments by the Intergovernmental Panel on Climate Change regarding extreme event attribution and socioeconomic vulnerability.

Category:2012 in the United States Category:Droughts in the United States