North American Hydroclimate Synthesis (NAHS) from multi-proxy hydroclimate records over the Common Era Rodysill, J.R.; Anderson, L.; Cronin, T.M.; Jones, M.C.; Thompson, R.S.; Wahl, D.B.; Willard, D.A.; Addison, J.A.; Alder, J.R.; Anderson, K.H.; Anderson, L.; Barron, J.A.; Bernhardt, C.E.; Hostetler, S.W.; Kehrwald, N.M.; Khan, N.S.; Richey, J.N.; Starratt, S.W.; Strickland, L.E.; Toomey, M.R.; Treat, C.C.; Wingard, G.L. Rodysill, J.R. Anderson, L. Cronin, T.M. Jones, M.C. Thompson, R.S. Wahl, D.B. Willard, D.A. Addison, J.A. Alder, J.R. Anderson, K.H. Anderson, L. Barron, J.A. Bernhardt, C.E. Hostetler, S.W. Kehrwald, N.M. Khan, N.S. Richey, J.N. Starratt, S.W. Strickland, L.E. Toomey, M.R. Treat, C.C. Wingard, G.L. earth science/paleoclimate/climate reconstructions (age at sample end,null,null,year Common Era,null,climate reconstructions,null,null,N,end year of 100-year bin) earth science/paleoclimate/climate reconstructions (age at sample end,null,null,year Common Era,null,climate reconstructions,null,null,N,end year of 200-year bin) earth science/paleoclimate/climate reconstructions (moisture index,multiple proxies,null,dimensionless,null,climate reconstructions,null,null,N,fraction representing the difference between the number of chronologies indicating wet anomalies and the number of chronologies indicating dry anomalies relative to the total number of chronologies exported from Bacon in a given 100-year window; negative: more chronologies indicate drier than average than wetter than average; positive: more chronologies indicate wetter than average than drier than average; Data used for Supplementary Figures 1-20; Methods Section 3.5) earth science/paleoclimate/climate reconstructions (age at sample start,null,null,year Common Era,null,climate reconstructions,null,null,N,start year of 200-year bin) earth science/paleoclimate/climate reconstructions (age at sample start,null,null,year Common Era,null,climate reconstructions,null,null,N,start year of 100-year bin) earth science/paleoclimate/climate reconstructions (moisture index,multiple proxies,null,dimensionless,null,climate reconstructions,null,null,N,fraction representing the difference between the number of chronologies indicating wet anomalies and the number of chronologies indicating dry anomalies relative to the total number of chronologies exported from Bacon in a given 200-year window; negative: more chronologies indicate drier than average than wetter than average; positive: more chronologies indicate wetter than average than drier than average; Methods Section 3.5) earth science/paleoclimate/reconstructions (North America NAHS>LATITUDE >LONGITUDE ) This study presents a synthesis of century-scale hydroclimate variations in North America for the Common Era (last 2000 years) using new age models of previously published multiple proxy-based paleoclimate data. This North American Hydroclimate Synthesis (NAHS) examines regional hydroclimate patterns and related environmental indicators, including vegetation, lake water elevation, stream flow and runoff, cave drip rates, biological productivity, assemblages of living organisms, and salinity. Centennial-scale hydroclimate anomalies are obtained by iteratively sampling the proxy data on each of thousands of age model realizations and determining the fractions of possible time series indicating that the century-smoothed data was anomalously wet or dry relative to the 100 BCE to 1900 CE mean. Results suggest regionally asynchronous wet and dry periods over multidecadal to centennial timescales and frequent periods of extended regional drought. Most sites indicate drying during previously documented multicentennial periods of warmer Northern Hemisphere temperatures, particularly in the western U.S., central U.S., and Canada. Two widespread droughts were documented by the NAHS: from 50 BCE to 450 CE and from 800 to 1100 CE. Major hydroclimate reorganizations occurred out of sync with Northern Hemisphere temperature variations and widespread wet and dry anomalies occurred during both warm and cool periods. We present a broad assessment of paleoclimate relationships that highlights the potential influences of internal variability and external forcing and supports a prominent role for Pacific and Atlantic Ocean dynamics on century-scale continental hydroclimate. STUDY NOTES: North American multi-proxy hydroclimate records are synthesized with new chronologies. Hydroclimate reconstructions document clear regional trends during the Common Era. Regionally asynchronous spatial variability occurred at centennial timescales. Widespread North American drought coincided with warm N. Hemisphere temperatures. Wet and dry climates occurred during both warm and cool climates. The data used for the assemblage-based hydroclimate interpretation can be found at the Original_Source_Data_URL or by contacting the authors of the associated publication listed in the RecordsUsed_Metadata file. Provided Keywords: precipitation, ground water, lake level, salinity, vegetation, lake salinity NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rodysill, J.R. Investigator : Anderson, L. Investigator : Cronin, T.M. Investigator : Jones, M.C. Investigator : Thompson, R.S. Investigator : Wahl, D.B. Investigator : Willard, D.A. Investigator : Addison, J.A. Investigator : Alder, J.R. Investigator : Anderson, K.H. Investigator : Anderson, L. Investigator : Barron, J.A. Investigator : Bernhardt, C.E. Investigator : Hostetler, S.W. Investigator : Kehrwald, N.M. Investigator : Khan, N.S. Investigator : Richey, J.N. Investigator : Starratt, S.W. Investigator : Strickland, L.E. Investigator : Toomey, M.R. Investigator : Treat, C.C. Investigator : Wingard, G.L. 2018-08-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/24910 https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-RecordsUsed_Metadata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-hydro_interp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-2kslope.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-bacon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100bin.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-200fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig13.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-RecordsUsed_Metadata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-hydro_interp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-2kslope.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-bacon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100bin.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-200fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig13.txt English https://www.ncdc.noaa.gov/paleo/study/24910 https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-RecordsUsed_Metadata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-hydro_interp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-2kslope.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-bacon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100bin.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-100fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-200fract.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/rodysill2018/rodysill2018-fig13.txt Rodysill, Jessica R.; Anderson, Lesleigh; Cronin, Thomas M.; Jones, Miriam C.; Thompson, Robert S.; Wahl, David B.; Willard, Debra A.; Addison, Jason A.; Alder, Jay R.; Anderson, Katherine H.; Anderson, Lysanna; Barron, John A.; Bernhardt, Christopher E.; Hostetler, Steven W.; Kehrwald, Natalie M.; Khan, Nicole S.; Richey, Julie N.; Starratt, Scott W.; Strickland, Laura E.; Toomey, Michael R.; Treat, Claire C.; Wingard, G. Lynn2018A North American Hydroclimate Synthesis (NAHS) of the Common EraGlobal and Planetary Change162175-19810.1016/j.gloplacha.2017.12.025www.sciencedirect.com/science/article/pii/S0921818117304174 START YEAR: -100 AD * END YEAR: 1900 AD -159.4316 17.4 -63.5392 74.89164