noaa-recon-6221 Northeastern USA Little Ice Age Temperature and Precipitation Reconstructions Gajewski, K.J. Northeastern USA Little Ice Age Temperature and Precipitation Reconstructions 1993-01-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/6221 Investigator K.J. Gajewski earth science paleoclimate climate reconstructions|pollen age,null,null,calendar year before present,null,climate reconstructions|pollen,null,null,N,present defined as 1975 A.D. earth science paleoclimate climate reconstructions|pollen precipitation,null,null,millimeter,annual,climate reconstructions|pollen,null,regression analysis,N,calibration data set: local instrumental data; multiple linear regression earth science paleoclimate climate reconstructions|pollen surface temperature,null,null,degree Celsius,Jun-Aug,climate reconstructions|pollen,null,regression analysis,N,calibration data set: local instrumental data; multiple linear regression earth science paleoclimate reconstructions precipitation earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction Little Ice Age (LIA) Precipitation Reconstruction 2040 cal yr BP 7 cal yr BP Complete 43.75 48 -91.48333 -67.88333 124 513 Continent North America United States Of America Maine Conroy Lake (CONROY)>LATITUDE 46.28333>LONGITUDE -67.88333 Continent North America United States Of America Wisconsin Dark Lake (DARKLAKE)>LATITUDE 45.275>LONGITUDE -91.475 Continent North America United States Of America Maine Basin Pond (BASINPND)>LATITUDE 44.47>LONGITUDE -70.05 Continent North America United States Of America Minnesota Lake of the Clouds [Minnesota] (LKCLDSH)>LATITUDE 48>LONGITUDE -91.116667 Continent North America United States Of America Wisconsin Little Pine Lake (LITTLPIN)>LATITUDE 45.28333>LONGITUDE -91.48333 Continent North America United States Of America New York Clear Pond [New York] (CLRPNDNY)>LATITUDE 43.75>LONGITUDE -74.016667 Continent North America United States Of America Wisconsin Hell's Kitchen Lake (HELLSKIT)>LATITUDE 46.18333>LONGITUDE -89.7 Continent North America United States Of America Wisconsin Ruby Lake (RUBYLAKE)>LATITUDE 45.26667>LONGITUDE -91.45834 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 K. Gajewski 1988 Quaternary Research 29 3 255-262 10.1016/0033-5894(88)90034-8 http://www.sciencedirect.com/science/article/pii/0033589488900348 K. Gajewski 1987 Plant Ecology (formerly Vegetatio) 68 3 179-190 10.1007/BF00114719 http://link.springer.com/article/10.1007/BF00114719

Well-dated pollen profiles from six sites from Maine to Minnesota record vegetation changes indicative of summer temperature and annual precipitation variations over the past 2000 yr. Laminations in the sediment provide accurate time control. Multiple regression techniques were used to calculate calibration functions from a spatial network of modern pollen and climate data. When applied to the six pollen diagrams, these calibration functions yielded estimates that show a long-term trend toward lower summer temperature. Superimposed on this long-term trend are short-term fluctuations that are frequently in phase at the sites. Departures from the long-term cooling trend are positive around 1500 yr ago (indicating relative warmth) and negative between 200 and 500 yr ago (indicating relative cold). Annual precipitation showed a slight increase at several sites during the past 1000 yr relative to the previous 1000 yr. STUDY NOTES: Mean summer (JJA) temperatures and Total annual precipitation for the past 2000 years reconstructed from pollen from lakes with laminated sediments. The laminations ensure a more precise time control than normally obtained from radiocarbon.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/clear1988.txt Formatted Text File; Clear Pond Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/liadata.txt Original Data Text File; Northeastern USA Temperature and Precipitation Reconstuctions, 8 sites GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/clouds1988.txt Formatted Text File; Lake of the Clouds Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/ruby1988.txt Formatted Text File; Ruby Lake Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/conroy1988.txt Formatted Text File; Conroy Lake Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/dark1988.txt Formatted Text File; Dark Lake Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/hells1988.txt Formatted Text File; Hell's Kitchen Lake Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/basin1988.txt Formatted Text File; Basin Pond Temperature and Precipitation Reconstuctions GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pollen/recons/pine1988.txt Formatted Text File; Little Pine Lake Temperature and Precipitation Reconstuctions USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11