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Ohio Winter Precipitation and Stream Flow Associations to Pacific Atmospheric and Oceanic Teleconnection Patterns

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/25134

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dc.creator Rogers, Jeffrey C.
dc.creator Coleman, Jill S. M.
dc.date.accessioned 2007-05-21T19:59:08Z
dc.date.available 2007-05-21T19:59:08Z
dc.date.issued 2004-06
dc.identifier.citation The Ohio Journal of Science, v104, n3 (June, 2004), 51-59. en
dc.identifier.issn 0030-0950 en
dc.identifier.uri http://hdl.handle.net/1811/25134
dc.description Author Institution: Dept of Geography, The Ohio State University en
dc.description.abstract The relationship between the Pacific/North American (PNA) atmospheric circulation teleconnection, equatorial Pacific sea surface temperature anomalies (SSTAs), and Ohio winter (DJF) precipitation and stream flow is described using data for 84 statewide climate stations and 29 rivers. Maximum correlations between the PNA index (PNAI) and station precipitation reach r = -0.7 in southwestern Ohio (n = 53) and are as high as r = +0.6 (n = 104) using a proxy North Pacific index (NPI) comprised of sea level pressures. The Ohio winter precipitation and streamflow relationship with the PNAI and NPI is strongest in southern and southwestern Ohio, generally decreasing to non-significance over northern Ohio, and particularly the northeastern snow belt. In contrast, Niño 3.4 equatorial Pacific correlations reach r = 0.5 when SSTs precede winter by one month. Wettest (driest) Ohio winters occur during relatively zonal (meridional) flow, representing PNAI negative (positive) modes when north Pacific sea level pressure is anomalously high (low). Wet winters are characterized by a 500 hPa trough across the central US east of the Rockies, with surface cyclones and associated frontal activity traversing Ohio after originating in areas such as Colorado and the western Gulf of Mexico. When the meridional flow of the PNA positive mode occurs, Ohio winters are consistently drier than normal and stream flow is typically about 50% of the PNA wet winters. Much higher variability occurs during PNA negative mode winters; precipitation and stream flow are occasionally below normal, but more typically above normal with some extraordinarily wet winters. en
dc.format.extent 193355 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.rights Reproduction of articles for non-commercial educational or research use granted without request if credit to The Ohio State University and The Ohio Academy of Science is given. en
dc.title Ohio Winter Precipitation and Stream Flow Associations to Pacific Atmospheric and Oceanic Teleconnection Patterns en
dc.type Article