Bigio fire data from Vallecito Country Market, San Juan Mountains - IMPD USVCM001 Bigio, E.R.; Swetnam, T.W.; Baisan, C.H. Bigio, E.R. Swetnam, T.W. Baisan, C.H. drought PIPO Pinus ponderosa Douglas ex C. Lawson ponderosa pine western yellow 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/fire history|tree ring (age,null,null,null,null,fire history|tree ring,null,null,N,null) earth science/paleoclimate/fire history (Vallecito Country Market>LATITUDE 37.437846>LONGITUDE -107.561018) We used tree-ring and alluvial sediment methods to reconstruct past fire regimes for a mixed conifer forest within a 1 km2 drainage basin which was severely burned by a wildfire near Durango, Colorado. Post-fire debris flow events incised the valley-filling alluvial sediments in the lower basin, and created exposures of fire-related of deposits of late-Holocene age. Tree-ring and alluvial sediment fire history records were created separately, and then compared and integrated to create a ~ 3000 year record of past fire activity. The tree-ring record showed that from ad 1679 to 1879, there were frequent surface fires, while patches of high-severity fire occurred during widespread fire years. The alluvial record showed that a low- to moderate- and mixed-severity fire regime has likely been dominant over the past ~ 2600 calibrated calendar years before present, as shown by locally episodic deposition of charcoal-rich, fine-grained sediments. Radiocarbon dating suggested that in two stratigraphic sections, there was rapid deposition of several fine-grained sediment layers. One of these episodes occurred during the Medieval Climatic Anomaly (ad 900 - 1300). A charcoal-rich debris flow deposit in the oldest exposed part of the stratigraphic record dated to ~ 2600 calibrated calendar years before present. This event was potentially equivalent in magnitude to the debris-flow events following the recent wildfire in the study area, and is evidence of a high-severity fire that burned a large proportion of the study basin. The timing of this event coincides with a period of less frequent, yet more severe wildfires in a nearby lake sediment record, and is associated with the end of a Neoglacial period of cooler and wetter temperatures. STUDY NOTES: This site was chosen to correspond with alluvial-stratigraphy fire history sampling locations. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bigio, E.R. Investigator : Swetnam, T.W. Investigator : Baisan, C.H. 2014-07-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16828 https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.txt https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.txt English https://www.ncdc.noaa.gov/paleo/study/16828 https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.fhx https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.png https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/fire-hist-graphs/usvcm001-fire-hist-graph.pdf https://www1.ncdc.noaa.gov/pub/data/paleo/firehistory/firescar/northamerica/usvcm001.txt Bigio, E., Swetnam, T.W., Baisan, C.H. 20102010A comparison and integration of tree-ring and alluvial records of fire history at the Missionary Ridge Fire, Durango, Colorado, USA.The Holocene7201047 - 106110.1177/0959683610369502 START YEAR: 1502 AD * END YEAR: 2004 AD -107.561018 37.437846 -107.561018 37.437846