Firth River Tree Ring Data [Anchukaitis, K.] https://data.eol.ucar.edu/dataset/106.460 Summary Northwestern North America has one of the highest rates of recent temperature increase in the world, but the putative "divergence problem" in dendroclimatology potentially limits the ability of tree-ring proxy data at high latitudes to provide long-term context for current anthropogenic change. Here, summer temperatures are reconstructed from a Picea glauca maximum latewood density (MXD) chronology that shows a stable relationship to regional temperatures and spans most of the last millennium at the Firth River in northeastern Alaska. The warmest epoch in the last nine centuries is estimated to have occurred during the late twentieth century, with average temperatures over the last 30 yr of the reconstruction developed for this study [1973-2002 in the Common Era (CE)] approximately 1.3° ± 0.4°C warmer than the long-term preindustrial mean (1100-1850 CE), a change associated with rapid increases in greenhouse gases. Prior to the late twentieth century, multidecadal temperature fluctuations covary broadly with changes in natural radiative forcing. The findings presented here emphasize that tree-ring proxies can provide reliable indicators of temperature variability even in a rapidly warming climate. Identifiers * Local archive identifier: 106.460 Citation Anchukaitis, K., et al. 2015. Firth River Tree Ring Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://data.eol.ucar.edu/dataset/106.460 Accessed 20 Apr 2024. If you plan to cite this dataset in a publication, please email us at: datahelp@eol.ucar.edu We may be able to provide an updated citation that includes a DOI. Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * ARCSS: NSF Arctic System Science https://data.eol.ucar.edu/project/ARCSS Additional information * Spatial Type: point * Frequency: continuous * Language: English ISO Topic Categories * climatologyMeteorologyAtmosphere Categories * Arctic * Biology * Ecology * Land Based * Paleoclimatology Platforms * Field Surveys Instruments * Coring Devices GCMD Science Keywords * EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > TREE RINGS * EARTH SCIENCE > BIOSPHERE > VEGETATION > TREE RINGS * EARTH SCIENCE > CLIMATE INDICATORS > PALEOCLIMATE INDICATORS > BIOLOGICAL RECORDS > TREE RINGS Related links * companion: 106.459: Firth River Alaska 930 Year Maximum Latewood Density Temperature Reconstruction https://data.eol.ucar.edu/dataset/106.459 * homepage: ARCSS EOL Webpage https://www.eol.ucar.edu/field_projects/arcss * info: AMS Journals Online: Tree-Ring-Reconstructed Summer Temperatures from Northwestern North America during the Last Nine Centuries https://doi.org/10.1175/JCLI-D-11-00139.1 * info: ARCSS Data Policy https://data.eol.ucar.edu/arctic_projects/arcss/Data_Policy.html * download: Anchukaitis - Firth River 1236 - PCGL - ITRDB AK132 https://www.ncdc.noaa.gov/cdo/f?p=519:1:0::::P1_STUDY_ID:14790 Temporal coverage * Begin datetime: 1073-01-01 00:00:00 * End datetime: 2002-12-31 23:59:59 Spatial coverage * Maximum (North) Latitude: 68.65 * Minimum (South) Latitude: 68.65 * Minimum (West) Longitude: -141.63 * Maximum (East) Longitude: -141.63 Primary contact information * pointOfContact: Kevin Anchukaitis https://data.eol.ucar.edu/contact/show/1816 Additional contact information * principalInvestigator: Kevin Anchukaitis https://data.eol.ucar.edu/contact/show/1816 * author: Kevin Anchukaitis https://data.eol.ucar.edu/contact/show/1816 * principalInvestigator: Rosanne D'Arrigo https://data.eol.ucar.edu/contact/show/1817 * principalInvestigator: Scott J. Goetz https://data.eol.ucar.edu/contact/show/984 * author: Rosanne D'Arrigo https://data.eol.ucar.edu/contact/show/1817 * principalInvestigator: Pieter S. A. Beck https://data.eol.ucar.edu/contact/show/896 * author: David Frank https://data.eol.ucar.edu/contact/show/1819 * author: Laia Andreu Hayles https://data.eol.ucar.edu/contact/show/1818 * author: Brendan M. Buckley https://data.eol.ucar.edu/contact/show/1822 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/106.460?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/106.460?format=isotc211