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NORTHERN ILLINOIS UNIVERSITY (2013)

Assessing the cause of changing apparent temperatures in the Central United States

Skelly, Laura

Titre : Assessing the cause of changing apparent temperatures in the Central United States

Auteur : Skelly, Laura

Université de soutenance : NORTHERN ILLINOIS UNIVERSITY

Grade : Master of Science (MS) 2013

Résumé
The Central United States has experienced increases in summer apparent temperatures and related heat waves since the mid-1980s. The upper Midwest has encountered continuous increases in acreage planted in corn and soybeans, which in turn has enhanced summer evapotranspiration rates and surface dew point levels. The top 10 percent of maximum apparent temperatures were determined for 76 First Order Weather Stations and the corresponding maximum air temperatures and maximum dew point temperatures were examined. Nebraska, South Dakota, and North Dakota experienced significant increases in apparent temperature (0.3°C), non-significant decreases in air temperature (-0.1°C), and the largest significant increases in dew point temperature (over 2°C) from 1961 to 2010, coinciding with the greatest percent increase in the amount of corn and soybean acres planted since 1973. The regional supply of moisture in the upper Midwest has increased faster than moisture supplied by the Gulf of Mexico, suggesting that agriculture has influenced climate in that area.

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Page publiée le 18 mars 2015, mise à jour le 19 novembre 2018