noaa-icecore-35133 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2025-06-04 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Bona-Churchill Alaska Ice Core 70 Year Black Carbon and Ammonium Data 2022-01-10 publication doi:10.25921/qcdb-g896 noaa-icecore-35133 NCEI DSI 1200_02 NCEI DSI 1200_01 Sierra-Hernández, M.R. originator Sierra-Hernández, M.R. author Beaudon, E. originator Beaudon, E. author Porter, S.E. originator Porter, S.E. author Mosley-Thompson, E. originator Mosley-Thompson, E. author Thompson, L.G. originator Thompson, L.G. author NOAA National Centers for Environmental Information publisher tableDigital This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Ice Core. The data include parameters of ice cores with a geographic location of Alaska, United States Of America. The time period coverage is from 17 to -51 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. completed NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncei.noaa.gov/pub/data/paleo/webimages/pc-default-icecore.png Paleoclimatology - Ice Core PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Ice Core Records Earth Science > Paleoclimate > Ice Core Records theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice cores earth science > paleoclimate > ice core > chemistry theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian What: black carbon; Material: bulk ice What: ammonium; Material: bulk ice What: ammonium; Material: bulk ice What: black carbon; Material: bulk ice What: ammonium; Material: bulk ice What: black carbon; Material: bulk ice What: ice age; Material: null theme Paleoenvironmental Standard Terms (PaST) Thesaurus NOAA National Centers for Environmental Information https://www.ncei.noaa.gov/products/paleoclimatology/paleoenvironmental-standard-terms-thesaurus PaST Thesaurus information publisher Continent > North America > United States Of America > Alaska > Bona-Churchill col > LATITUDE 61.4 > LONGITUDE -141.7 place DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions Cite as: Sierra-Hernández, M.R.; Beaudon, E.; Porter, S.E.; Mosley-Thompson, E.; Thompson, L.G. (2022-01-10): NOAA/WDS Paleoclimatology - Bona-Churchill Alaska Ice Core 70 Year Black Carbon and Ammonium Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/qcdb-g896. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose otherRestrictions None otherRestrictions Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. Increased Fire Activity in Alaska since the 1980s: Evidence from an Ice Core-derived Black Carbon Record 2022 publication M. Roxana Sierra-Hernández, Emilie Beaudon, Stacy E. Porter, Ellen Mosley-Thompson, Lonnie G. Thompson author Journal of Geophysical Research: Atmospheres publisher https://doi.org/10.1029/2021JD035668 HTTPS Web Browser Associated Reference published 2022 M. Roxana Sierra-Hernández, Emilie Beaudon, Stacy E. Porter, Ellen Mosley-Thompson, Lonnie G. Thompson, 2022: Increased Fire Activity in Alaska since the 1980s: Evidence from an Ice Core-derived Black Carbon Record. Journal of Geophysical Research: Atmospheres, , , 10.1029/2021JD035668 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 1933 CE to 2001 CE; Date Range: 17 cal yr BP to -51 cal yr BP; -141.7 -141.7 61.4 61.4 Study Coordinates 61.4 -141.7 1933 2001 STUDY NOTES: Black carbon and ammonium data from the Bona-Churchill col, Alaska ice core for 1933 - 2001 CE. ABSTRACT SUPPLIED BY ORIGINATOR: Wildfires emit large quantities of particles that affect Earth's climate and human health. Black carbon (BC), commonly known as soot, is directly emitted to the atmosphere by wildfires and other processes and can be transported and deposited in remote regions including high-altitude glaciers and the Polar Regions. Here, we present a continuous, high-resolution record of BC and ammonium (NH4+) from 1933 to 2001 extracted from two ice cores retrieved in 2002 from the col between Mt. Bona and Mt. Churchill in the Wrangell-St. Elias Mountain Range, southeast Alaska. Despite the substantial increase of BC from fossil fuels in the Arctic since the Industrial Revolution, BC at Bona-Churchill originates primarily from biomass burning and thus provides a record reflecting a fire history for Alaska. The BC record from Bona-Churchill reveals that high fire activity became more frequent after 1984 in agreement with Alaska fire records. Most years associated with high BC or high NH4+ before 1984 occurred during El Niño events when precipitation in Alaska was below "normal," suggesting that precipitation played an important role in modulating fire activity in Alaska prior to the 1980s. Conversely, years with high BC or NH4+ after 1984 coincided with years with "normal" and low precipitation, but elevated temperatures, strongly suggesting that temperature became a more dominant factor influencing fire activity in Alaska after the 1980s as suggested by other studies. Recent Alaska fire records and temperatures indicate that this trend has continued in the 21st century. NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Native Format(s) https://doi.org/10.25921/qcdb-g896 HTTPS Landing Page Metadata Landing Page NCEI landing page with general information and links to access the data. information https://www.ncei.noaa.gov/access/paleo-search/study/35133 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/ice-core HTTPS Information NCEI Ice Core Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/icecore/trop/bona-churchill/bona-churchill2022nh4.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/trop/bona-churchill/bona-churchill2022nh4-ann.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/trop/bona-churchill/bona-churchill2022bc.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/icecore/trop/bona-churchill/bona-churchill2022bc-ann.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21