<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Strong, C.</style></author><author><style face="normal" font="default" size="100%">Magnusdottir, G.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Role of Tropospheric Rossby Wave Breaking in the Pacific Decadal Oscillation</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Climate</style></secondary-title><alt-title><style face="normal" font="default" size="100%">J. Clim.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">1000</style></keyword><keyword><style  face="normal" font="default" size="100%">anomalies</style></keyword><keyword><style  face="normal" font="default" size="100%">atmospheric bridge</style></keyword><keyword><style  face="normal" font="default" size="100%">Content Type: Biblio</style></keyword><keyword><style  face="normal" font="default" size="100%">enso</style></keyword><keyword><style  face="normal" font="default" size="100%">hemisphere</style></keyword><keyword><style  face="normal" font="default" size="100%">interannual variability</style></keyword><keyword><style  face="normal" font="default" size="100%">Magnusdottir Modeling Lab</style></keyword><keyword><style  face="normal" font="default" size="100%">ocean</style></keyword><keyword><style  face="normal" font="default" size="100%">pna</style></keyword><keyword><style  face="normal" font="default" size="100%">precipitation</style></keyword><keyword><style  face="normal" font="default" size="100%">sst</style></keyword><keyword><style  face="normal" font="default" size="100%">teleconnections</style></keyword><keyword><style  face="normal" font="default" size="100%">western north-america</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Apr</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000265524900014</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">22</style></volume><pages><style face="normal" font="default" size="100%">1819-1833</style></pages><isbn><style face="normal" font="default" size="100%">0894-8755</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The leading pattern of extratropical Pacific sea surface temperature variability [the Pacific decadal oscillation (PDO)] is shown to depend on observed variability in the spatiotemporal distribution of tropospheric Rossby wave breaking (RWB), where RWB is the irreversible overturning of potential vorticity on isentropic surfaces. Composite analyses based on hundreds of RWB cases show that anticyclonic (cyclonic) RWB is associated with a warm, moist (cool, dry) column that extends down to a surface anticyclonic (cyclonic) circulation, and that the moisture and temperature advection associated with the surface circulation patterns force turbulent heat flux anomalies that project onto the spatial pattern of the PDO. The RWB patterns that are relevant to the PDO are closely tied to El Nino-Southern Oscillation, the Pacific-North American pattern, and the northern annular mode. These results explain the free troposphere-to-surface segment of the atmospheric bridge concept wherein El Nino anomalies emerge in summer and modify circulation patterns that act over several months to force sea surface temperature anomalies in the extratropical Pacific during late winter or early spring. Leading patterns of RWB account for a significant fraction of PDO interannual variability for any month of the year. A multilinear model is developed in which the January mean PDO index for 1958-2006 is regressed upon the leading principal components of cyclonic and anticyclonic RWB from the immediately preceding winter and summer months (four indexes in all), accounting for more than two-thirds of the variance.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000265524900014</style></accession-num><notes><style face="normal" font="default" size="100%">&lt;p&gt;ISI Document Delivery No.: 437ZETimes Cited: 0Cited Reference Count: 29Cited References:      ABATZOGLOU JT, 2006, J CLIMATE, V19, P6139     ALEXANDER MA, 1999, J CLIMATE 1, V12, P2419     ALEXANDER MA, 2002, J CLIMATE, V15, P2205     AUSTIN PC, 2004, AM STAT, V58, P131, DOI 10.1198/0003130043277     CAYAN DR, 1998, J CLIMATE, V11, P3148     DETTINGER MD, 1998, J CLIMATE, V11, P3095     KIRTMAN BP, 2002, GEOPHYS RES LETT, V29, ARTN 1367     LAU NC, 1996, J CLIMATE, V9, P2036     LIU ZY, 2007, REV GEOPHYS, V45, ARTN RG2005     MANTUA NJ, 1997, B AM METEOROL SOC, V78, P1069     MANTUA NJ, 2002, J OCEANOGR, V58, P35     MARTIUS O, 2007, J ATMOS SCI, V64, P2576, DOI 10.1175/JAS3977.1     MCINTYRE ME, 1983, NATURE, V305, P593     MINOBE S, 1997, GEOPHYS RES LETT, V24, P683     MINOBE S, 1999, GEOPHYS RES LETT, V26, P855     MOORE GWK, 2002, J CLIMATE, V15, P2020     MYSAK LA, 1986, CAN J FISH AQUAT SCI, V43, P464     NEWMAN M, 2007, J CLIMATE, V20, P2333, DOI 10.1175/JCLI4165.1     ORLANSKI I, 2005, J ATMOS SCI, V62, P1367     SCHNEIDER N, 2005, J CLIMATE, V18, P4355     STRAUS DM, 2002, J CLIMATE, V15, P2340     STRONG C, 2008, J ATMOS SCI, V65, P2861, DOI 10.1175/2008JAS2632.1     WALLACE JM, 1981, MON WEA REV, V109, P784     WOLD H, 1982, SYSTEMS INDIRECT OBS, V2, P1     WOLTER K, 1993, P 17 CLIM DIAGN WORK, P52     YEH SW, 2004, CLIM DYNAM, V22, P721, DOI 10.1007/s00382-004-0399-8     YEH SW, 2007, GEOPHYS RES LETT, V34, ARTN L14706     YU B, 2007, J CLIMATE, V20, P5285, DOI 10.1175/2007JCLI1480.1     ZHANG Y, 1996, J CLIMATE, V9, P1468Strong, Courtenay Magnusdottir, GudrunNoaa [na06oar4310149]This work was supported by NOAA Grant NA06OAR4310149. We thank two anonymous reviewers for comments that helped to improve the manuscript.Amer meteorological socBoston&lt;/p&gt;</style></notes><auth-address><style face="normal" font="default" size="100%">&lt;p&gt;[Strong, Courtenay] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA.Strong, C, Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA.cstrong@uci.edu&lt;/p&gt;</style></auth-address></record></records></xml>