Heyerdahl fire data from Potholes, central Oregon - IMPD USPOT002 Heyerdahl, E.K.; Falk, D.A.; Loehman, R.A. Heyerdahl, E.K. Falk, D.A. Loehman, R.A. PIPO Pinus ponderosa Douglas ex C. Lawson ponderosa pine western yellow pine PICO Pinus contorta Douglas ex Loudon lodgepole pine earth science/paleoclimate/fire history|tree ring (tree demographic and injury and fire event code,wood,null,null,null,fire history|tree ring,null,null,C,FHX2 data format; refer to IMPD documentation for description of codes) earth science/paleoclimate/ (sample identification,null,null,null,null,,null,null,C,Tree ID) earth science/paleoclimate/fire history|tree ring (age,null,null,null,null,fire history|tree ring,null,null,N,null) earth science/paleoclimate/fire history|tree ring (tree demographic and injury and fire event code,wood,null,null,null,fire history|tree ring,null,null,C,null) earth science/paleoclimate/fire history earth science/paleoclimate/fire history (Potholes>LATITUDE 43.730972>LONGITUDE -120.942639) In parts of central Oregon, coarse-textured pumice substrates limit forest composition to low-density lodgepole pine (Pinus contorta Douglas ex Loudon var. latifolia Engelm. ex S. Watson) with scattered ponderosa pine (Pinus ponderosa Lawson & C. Lawson) and a shrub understory dominated by antelope bitterbrush (Purshia tridentata (Pursh) DC.). We reconstructed the historical fire regime from tree rings and simulated fire behavior over 783 hectares of this forest type. For centuries (1650-1900), extensive mixed-severity fires occurred every 26 to 82 years, creating a multi-aged forest and shrub mosaic. Simulation modeling suggests that the historical mix of surface and passive crown fire were primarily driven by shrub biomass and wind speed. However, a century of fire exclusion has reduced the potential for the high-severity patches of fire that were common historically, likely by reducing bitterbrush cover, the primary ladder fuel. This reduced shrub cover is likely to persist until fire or insects create new canopy gaps. Crown fire potential may increase even with current fuel loadings if the climate predicted for mid-century lowers fuel moistures, but only under rare extreme winds. This study expands our emerging understanding of complexity in the disturbance dynamics of lodgepole pine across its broad North American range. STUDY NOTES: This site was sampled as part of a project to reconstruct historical fire regimes in central Oregon. Ring-boundary fire scars were assigned to the preceding calendar year. Several metadata files are provided with the FHX file. -999 in any file indicates no data. Ring-boundary fire scars were assigned to the preceding calendar year. Several metadata files are provided with the FHX file. -999 in any file indicates no data. Four supplemental information files are located at URL - http://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/ : (1) uspot002-plot-data.csv provides information on the plots. (2) uspot002-saplings.csv provides information on small trees that we did not attempt to remove wood samples from. These trees were tallied in each plot by species and diameter class (measured at breast height, 1.4 m) in 5.6-m radius plots. Diameter classes: 2.5 (0-5 cm), 7.5 (5-10 cm), 15 (10-20 cm). (3) uspot002-scarred-tree-info.csv provides information on fire-scarred trees, including ones we also sampled for recruitment date. (4) uspot002-undatable-trees.csv provides information on trees from which it did not appear that we could obtain intact wood samples. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Heyerdahl, E.K. Investigator : Falk, D.A. Investigator : Loehman, R.A. 2015-02-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18097 https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-undatable-trees.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/establishment/northamerica/uspot002.dat https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-scarred-tree-info.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-saplings.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-plot-data.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-undatable-trees.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/establishment/northamerica/uspot002.dat https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-scarred-tree-info.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-saplings.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-plot-data.csv English https://www.ncdc.noaa.gov/paleo/study/18097 https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-undatable-trees.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/establishment/northamerica/uspot002.dat https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/uspot002.txt https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-scarred-tree-info.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-saplings.csv https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/uspot002-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/supplemental/uspot002-plot-data.csv Heyerdahl, E.K., R.A. Loehman, D.A. Falk2014Mixed-severity fire in lodgepole-dominated forests: Are historical regimes sustainable on Oregon's Pumice Plateau, USA?Canadian Journal of Forest Research44593-603doi 10.1139/cjfr-2013-0413 START YEAR: 1490 AD * END YEAR: 2009 AD -120.942639 43.730972 -120.942639 43.730972