noaa-insect-23990 Wax Lips Lake, NW Greenland Holocene and Last Interglacial Chironomid Inferred Temperature McFarlin, J.M.; Axford, Y.; Osburn, M.R.; Kelly, M.A.; Osterberg, E.; Farnsworth, L.B. Wax Lips Lake, NW Greenland Holocene and Last Interglacial Chironomid Inferred Temperature 2018-06-04 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23990 Investigator J.M. McFarlin Investigator Y. Axford Investigator M.R. Osburn Investigator M.A. Kelly Investigator E. Osterberg Investigator L.B. Farnsworth earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Tribe Pentaneurini earth science paleoclimate climate reconstructions|insect|paleolimnology depth,null,null,centimeter,null,climate reconstructions|insect|paleolimnology,null,null,N,depth measured from top of core earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Chironomus earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Psectrocladius earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Stictochironomus earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Cricotopus/Orthocladius earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Paracladius earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Psuedodiamesa earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Corynoneura/Thienemanniella earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Hydrobaenus/Oliveridia earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Zalutschia earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,subtribe Tanytarsini earth science paleoclimate insect|paleolimnology total head capsules,null,null,count,null,insect|paleolimnology,null,null,N,raw count of whole midge head capsules that were no ID + unknown earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Procladius-type earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Sergentia earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Heterotrissicladius earth science paleoclimate insect|paleolimnology total head capsules,null,null,count per gram,null,insect|paleolimnology,null,null,N,total whole head capsules per gram wet sediment earth science paleoclimate climate reconstructions|insect|paleolimnology air temperature,midge assemblage,null,degree Celsius,Jul,climate reconstructions|insect|paleolimnology,null,null,N,weighted-average model with tolerance down-weighting and inverse-deshrinking and bootstrapping using Francis et al (2006) training set earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Eukiefferiella/Tvetenia earth science paleoclimate insect|paleolimnology identified midge,null,null,percent,null,insect|paleolimnology,null,null,N,Chaoborus earth science paleoclimate insecta population abundance geoscientificInformation 120000 cal yr BP 700 cal yr BP Complete 76.852 76.852 -66.959 -66.959 517 517 Continent North America Greenland Wax Lips Lake>LATITUDE 76.852>LONGITUDE -66.959 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Jamie M. McFarlin, Yarrow Axford, Magdalena R. Osburn, Meredith A. Kelly, Erich C. Osterberg, Lauren B. Farnsworth 2018 Proceedings of the National Academy of Sciences 10.1073/pnas.1720420115 http://www.pnas.org/content/early/2018/05/30/1720420115

Projections of future rates of mass loss from the Greenland Ice Sheet are highly uncertain because its sensitivity to warming is unclear. Geologic reconstructions of Quaternary interglacials can illustrate how the ice sheet responded during past warm periods, providing insights into ice sheet behavior and important tests for data-model comparisons. However, paleoclimate records from Greenland are limited: Early Holocene peak warmth has been quantified at only a few sites, and terrestrial sedimentary records of prior interglacials are exceptionally rare due to glacial erosion during the last glacial period. Here, we discuss findings from a lacustrine archive that records both the Holocene and the Last Interglacial (LIG) from Greenland, allowing for direct comparison between two interglacials. Sedimentary chironomid assemblages indicate peak July temperatures 4.0 to 7.0 C warmer than modern during the Early Holocene maximum in summer insolation. Chaoborus and chironomids in LIG sediments indicate July temperatures at least 5.5 to 8.5 C warmer than modern. These estimates indicate pronounced warming in northwest Greenland during both interglacials. This helps explain dramatic ice sheet thinning at Camp Century in northwest Greenland during the Early Holocene and, for the LIG, aligns with controversial estimates of Eemian warming from ice core data retrieved in northern Greenland. Converging geologic evidence for strong LIG warming is challenging to reconcile with inferred Greenland Ice Sheet extent during the LIG, and the two appear incompatible in many models of ice sheet evolution. An increase in LIG snowfall could help resolve this problem, pointing to the need for hydroclimate reconstructions from the region. STUDY NOTES: Chironomid and Chaoborus assemblage data and midge-inferred temperature reconstructions for core 14WLL2A Wax Lips Lake in northwest Greenland through the Holocene and Last Interglacial

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/insecta/chironomidae/northamerica/greenland/waxlips2018cit.txt NOAA Template; Wax Lips Lake Chironomid Data and Inferred Temperature USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11