noaa-insect-12443 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 2024-11-01 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Alaska Holocene Midge Data and July Temperature Reconstructions 2012-02-04 publication doi:10.25921/awmg-1r11 noaa-insect-12443 NCEI DSI 1200_02 NCEI DSI 1200_01 Clegg, B.F. originator Clegg, B.F. author Kelly, R.F. originator Kelly, R.F. author Clarke, G.H. originator Clarke, G.H. author Walker, I.R. originator Walker, I.R. author Hu, F.S. originator Hu, F.S. 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 Insect. The data include parameters of climate reconstructions|insect|paleolimnology with a geographic location of Alaska, United States Of America. The time period coverage is from 13506 to -54 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 and environment derived from beetle and other insect fossils. 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-insect.png Paleoclimatology - Insect PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions Earth Science > Paleoclimate > Paleoclimate Reconstructions 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 > climate reconstructions|insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > climate reconstructions|insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > climate reconstructions|insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > climate reconstructions|insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > climate reconstructions|insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insect|paleolimnology earth science > paleoclimate > insecta > population abundance 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 Air Temperature Reconstruction Arctic Oscillation (AO) Milankovitch theme What: depth at sample end; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: age at sample end; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: surface air temperature; Material: midge assemblage What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: surface air temperature; Material: midge assemblage What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: depth at sample start; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; Material: null What: identified midge; 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 > Screaming Lynx Lake > LATITUDE 66.0667 > LONGITUDE -145.4 Continent > North America > United States Of America > Alaska > Rainbow Lake Alaska > LATITUDE 60.7167 > LONGITUDE -150.8 Continent > North America > United States Of America > Alaska > Hudson Lake Alaska > LATITUDE 61.9 > LONGITUDE -145.6833 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: Clegg, B.F.; Kelly, R.F.; Clarke, G.H.; Walker, I.R.; Hu, F.S. (2012-02-04): NOAA/WDS Paleoclimatology - Alaska Holocene Midge Data and July Temperature Reconstructions. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/awmg-1r11. 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. Nonlinear response of summer temperature to Holocene insolation forcing in Alaska 2011 publication Clegg, B.F., R. Kelly, G.H. Clarke, I.R. Walker, and F.S. Hu author Proceedings of the National Academy of Sciences publisher https://doi.org/10.1073/pnas.1110913108 HTTPS Web Browser Associated Reference published 2011 Clegg, B.F., R. Kelly, G.H. Clarke, I.R. Walker, and F.S. Hu, 2011: Nonlinear response of summer temperature to Holocene insolation forcing in Alaska. Proceedings of the National Academy of Sciences, 108, 19299-19304, 10.1073/pnas.1110913108 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 13506 cal yr BP to -54 cal yr BP; -150.8 -145.4 60.7167 66.0667 -11556 2004 STUDY NOTES: Holocene midge data and midge-inferred july temperatures from 3 lakes in Alaska, USA. Chironomid data are expressed as raw headcapsule counts. Taxonomy follows Barley et al. (2006). ABSTRACT SUPPLIED BY ORIGINATOR: Regional climate responses to large-scale forcings, such as precessional changes in solar irradiation and increases in anthropogenic greenhouse gases, may be nonlinear as a result of complex interactions among earth system components. Such nonlinear behaviors constitute a major source of climate "surprises" with important socioeconomic and ecological implications. Paleorecords are key for elucidating patterns and mechanisms of nonlinear responses to radiative forcing, but their utility has been greatly limited by the paucity of quantitative temperature reconstructions. Here we present Holocene July temperature reconstructions on the basis of midge analysis of sediment cores from three Alaskan lakes. Results show that summer temperatures during 10,000-5,500 calibrated years (cal) B.P. were generally lower than modern and that peak summer temperatures around 5,000 were followed by a decreasing trend toward the present. These patterns stand in stark contrast with the trend of precessional insolation, which decreased by ~10% from 10,000 y ago to the present. Cool summers before 5,500 cal B.P. coincided with extensive summer ice cover in the western Arctic Ocean, persistence of a positive phase of the Arctic Oscillation, predominantly La Niña-like conditions, and variation in the position of the Alaskan treeline. These results illustrate nonlinear responses of summer temperatures to Holocene insolation radiative forcing in the Alaskan sub-Arctic, possibly because of state changes in the Arctic Oscillation and El Niño-Southern Oscillation and associated land-atmosphere-ocean feedbacks. 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/awmg-1r11 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/12443 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/insect HTTPS Information NCEI Insect Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/usa/alaska/alaska2011midge-t.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/usa/alaska/alaska2011midge-t.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