<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Margolis, Ellis Quinn</style></author></authors><tertiary-authors><author><style face="normal" font="default" size="100%">Swetnam, T.</style></author></tertiary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Fire History and Fire Climate Relationships in Upper Elevation Forests of the Southwestern United States</style></title><secondary-title><style face="normal" font="default" size="100%">School of Natural Resources</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">AMO</style></keyword><keyword><style  face="normal" font="default" size="100%">climate</style></keyword><keyword><style  face="normal" font="default" size="100%">dendrochronology</style></keyword><keyword><style  face="normal" font="default" size="100%">dendroclimatology</style></keyword><keyword><style  face="normal" font="default" size="100%">ENSO</style></keyword><keyword><style  face="normal" font="default" size="100%">environment</style></keyword><keyword><style  face="normal" font="default" size="100%">fire</style></keyword><keyword><style  face="normal" font="default" size="100%">fire history</style></keyword><keyword><style  face="normal" font="default" size="100%">forest</style></keyword><keyword><style  face="normal" font="default" size="100%">madrean sky islands</style></keyword><keyword><style  face="normal" font="default" size="100%">mogollon plateau</style></keyword><keyword><style  face="normal" font="default" size="100%">mountain</style></keyword><keyword><style  face="normal" font="default" size="100%">PDO</style></keyword><keyword><style  face="normal" font="default" size="100%">southwest</style></keyword><keyword><style  face="normal" font="default" size="100%">teleconnection</style></keyword><keyword><style  face="normal" font="default" size="100%">tree ring</style></keyword><keyword><style  face="normal" font="default" size="100%">upper elevation</style></keyword><keyword><style  face="normal" font="default" size="100%">Watershed Management</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=1375523671&amp;sid=1&amp;Fmt=2&amp;clientId=43922&amp;RQT=309&amp;VName=PQD.</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">University of Arizona</style></publisher><pub-location><style face="normal" font="default" size="100%">Tucson</style></pub-location><volume><style face="normal" font="default" size="100%">Ph.D</style></volume><pages><style face="normal" font="default" size="100%">182</style></pages><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Fire history and fire-climate relationships of upper elevation forests of the southwestern United States are imperative for informing management decisions in the face of increased crown fire occurrence and climate change. I used dendroecological techniques to reconstruct fires and stand-replacing fire patch size in Madrean Sky Islands and Mogollon Plateau. Reconstructed patch size (1685-1904) was compared with contemporary patch size (1996-2004). Reconstructed fires at three sites had stand-replacing patches totaling &amp;gt; 500 ha. No historical stand-replacing fire patches were evident in the mixed conifer/aspen forests of the Sky Islands. Maximum stand-replacing fire patch size of modern fires (1129 ha) was greater than that reconstructed from aspen (286 ha) and spruce-fir (521 ha). Updated spruce-fir patches may be evidence of larger (&amp;gt;2000ha) stand-replacing fire patches.&lt;/p&gt;&lt;p&gt;To provide climatological context for fire history I used correlation and regionalization analyses to document spatial and temporal variability in climate regions, and El-Nino Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO) and the Atlantic Multi-decadal Oscillation (AMO) teleconnections using 273 tree-ring chronologies (1732-1979). Four regions were determined by common variability in annual ring width. The component time score series replicate spatial variability in 20&lt;sup&gt;th&lt;/sup&gt; century droughts (e.g., 1950&amp;rsquo;s) and pluvials (e.g., 1910&amp;rsquo;s). Two regions were significantly correlated with instrumental SOI and AMO, and three with PDO. Sub-regions within the southwestern U.S. varied geographically between the instrumental (1900-1979) and the pre-instrumental periods (1732-1899). Mapped correlations between ENSO, PDO and AMO, and tree-ring indices illustrate detailed sub-regional variability in teleconnections.&lt;/p&gt;&lt;p&gt;I analyzed climate teleconnections, and fire-climate relationships of historical upper elevation fires from 16 sites in 8 mountain ranges. I tested for links between Palmer Drought Severity Index and tree-ring reconstructed ENSO, PDO and AMO phases (1905-1978 and 1700-1904). Upper elevation fires (115 fires, 84 fire years, 1623-1904) were compared with climate indices. ENSO, PDO, and AMO affected regional PDSI, but AMO and PDO teleconnections changed between periods. Fire occurrence was significantly related to inter-annual variability in PDSI, precipitation, ENSO, and phase combinations of ENSO and PDO, but not AMO (1700-1904). Reduced upper elevation fire (1785-1840) was coincident with a cool AMO phase.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">Dissertation</style></work-type><notes><style face="normal" font="default" size="100%">&lt;p&gt;Please contact the Laboratory of Tree Ring Research for a copy of this dissertation. The file is too large to be uploaded at this time.&lt;/p&gt;</style></notes></record></records></xml>