noaa-lakelevel-23074 New Long Pond, Massachesetts Lake Level data during the Holocene Newby, P.E.; Donnelly, J.P.; Shuman, B.N.; MacDonald, D. New Long Pond, Massachesetts Lake Level data during the Holocene 2017-11-15 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23074 Investigator P.E. Newby Investigator J.P. Donnelly Investigator B.N. Shuman Investigator D. MacDonald earth science paleoclimate climate reconstructions|lake levels|paleolimnology age,null,null,calendar year before present,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,range upper bound,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,null,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,Elevation below modern; Multi-core sediment stratigraphy constrains lake elevation earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,range lower bound,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,Elevation below modern; Multi-core sediment stratigraphy constrains lake elevation earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,range upper bound,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,Elevation below modern; Multi-core sediment stratigraphy constrains lake elevation earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,range lower bound,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|lake levels|paleolimnology lake level,null,null,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|lake levels|paleolimnology age,null,null,year Common Era,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null earth science paleoclimate lake levels geoscientificInformation Other Hydroclimate Reconstruction 11900 cal yr BP 50 cal yr BP Complete 41.85 41.85 -70.6777 -70.6777 29 29 Continent North America United States Of America Massachusetts New Long Pond, Massachusetts>LATITUDE 41.85>LONGITUDE -70.6777 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 Newby, Paige E., Jeffrey P. Donnelly, Bryan N. Shuman, and Dana MacDonald 2009 Quaternary Science Reviews 28 17-18 1675-1692 10.1016/j.quascirev.2009.02.020 Newby, Paige E., Bryan N. Shuman, Jeffrey P. Donnelly, Kristopher B. Karnauskas, and Jeremiah Marsicek 2014 Geophysical Research Letters 41 12 10.1002/2014GL060183

A principal method for studying past hydroclimatic change is the reconstruction of paleo-lake levels. Here, we provide high-resolution lake-level records from New Long Pond and Rocky Pond in southeastern Massachusetts, which each contain evidence for multiple, sub-centennial-to-millennial scale low stands during the transition between the Late Pleistocene (15.0 ka) and Middle Holocene (ca 7.0 ka). Data from New Long Pond also demonstrate sedimentary evidence for a drop in water levels in the early to mid AD 20th century, when long-term trends in instrumental data show lower-than-average precipitation in the northeastern United States. Local data show the most precipitous declines in precipitation and groundwater levels are concurrent with the most severe drought in the AD 1960s, which occurred during a period of low sea-surface temperatures in the western North Atlantic. Ground penetrating radar and sediment core data indicate five intervals with numerous paleo-shoreline deposits between ca 15.0 and 7.0 ka, similar to the layer deposited in the AD 1960s. Many of the intervals of low lake levels coincide with proposed meltwater release events or abrupt climate oscillations in the circum North Atlantic. For example, we document at least three low stands during the Younger Dryas (12.9-11.6 ka) and in association with the "9.2" and "8.2" ka events. The combined evidence of (1) concurrent paleo-droughts in southeastern New England with documented North Atlantic abrupt cooling events and (2) recent drought with the modern association of low sea-surface temperatures indicates that freshening and cooling of the western North Atlantic is a viable mechanism for decreasing moisture within the region. Large-scale changes in seasonality and ice sheet extent also may have increased the susceptibility of the northeast to dry conditions triggered by changes in the North Atlantic. STUDY NOTES: Lake level units are in "cm below modern level", so positive values indicate a drop in lake level. Contributed as part of the PAGES2k North American Hydroclimate synthesis project.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/data-version-1.0.0/NewLong.Newby.2014.lpd Linked Paleo Data (LiPD) File Format; New Long Pond Lake Level Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/noaa-templates/data-version-1.0.0/NewLong.Newby.2014.txt NOAA Template File; New Long Pond Lake Level Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11