Influence of enso on maximum, minimum, and mean temperatures in the southeast united states

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Abstract

The El Niño/Southern Oscillation (ENSO) phenomenon, in both its warm and cold states, has a pronounced influence on mean monthly temperature and precipitation in Southeast United States, particularly along the Gulf of Mexico coast. This paper examines the influence of ENSO warm and cold events on the average monthly maximum and minimum as well as mean temperatures at 88 stations across the Southeast during 1931–1994. Composite time series for the 24-month period from July prior to a warm- or cold-event year (year -1) to June following a warm- or cold-event year (year +1) are examined. In the months with the largest mean temperature departures, January and February of years +0 and +1, maximum and minimum temperature departures are of the same sign as the mean temperature departure. However, in much of the region south of Virginia, the maximum and minimum temperature departures are of opposite sign during the autumn of year +0 and spring of year +1. The role of cloud cover is examined in relation to the temperature response to ENSO. A decreased diurnal temperature range during the autumn of year +0 to the spring of year +1 occurred during warm events and is believed to be associated with increased cloud cover caused by an enhanced subtropical jet stream. © 1996 by V. H. Winston & Son, Inc.

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Mote, T. L. (1996). Influence of enso on maximum, minimum, and mean temperatures in the southeast united states. Physical Geography, 17(6), 497–512. https://doi.org/10.1080/02723646.1996.10642598

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