Zhou, YapingHiggins, R. Wayne2022-07-072022-07-07http://hdl.handle.net/11603/25118It is increasingly clear that a better understanding of the linkages between climate and weather is needed since many decision making processes in society are directly tied to weather “events”. In this paper, we will investigate the effects of two of the climate systems’ most prominent patterns of variability in the Northern Hemisphere, namely the El Nino-Southern Oscillation and the Arctic Oscillation (Thompson and Wallace, 1998) on precipitation probability distribution function (PDF), especially on the extreme precipitation over the conterminous United States. Previous studies have shown that ENSO related impacts on seasonal mean precipitation are profound over portions of the US (Ropelewski and Halpert, 1986, 1996; Kiladis and Diaz 1989; etc). Thompson and Wallace (2001) showed that the AO has strong impacts on regional climate. The primary concern of this paper is with ENSO, AO and combined (ENSO, AO) sensitivity of the tail of the daily precipitation distribution. Emphasis is placed on geographical patterns of this sensitivity for boreal winter (January - March 1950-1999).3 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domain Mark 1.0Text