Chesapeake Bay 2400 Year Isotope-Mg/Ca Data and Temperature Estimates Cronin, T.M.; Hayo, K.; Thunell, R.C.; Dwyer, G.S.; Saenger, C.P.; Willard, D.A. Cronin, T.M. Hayo, K. Thunell, R.C. Dwyer, G.S. Saenger, C.P. Willard, D.A. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,null,N,Elphidium selseyense) earth science/paleoclimate/climate reconstructions|paleoceanography (temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,smoothed,null,N,Estimated Bay Temp 5PtSmooth; Elphidium selseyense) earth science/paleoclimate/paleoceanography (magnesium/calcium,benthic foraminifer,null,millimole per mole,null,paleoceanography,null,null,N,Elphidium selseyense) earth science/paleoclimate/climate reconstructions|paleoceanography (delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil,null,climate reconstructions|paleoceanography,null,null,N,Estimated Bay water d18O w/.8 per mil correction; Elphidium selseyense) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil VPDB,null,paleoceanography,null,null,N,Elphidium selseyense) earth science/paleoclimate/climate reconstructions|paleoceanography (salinity,delta 18O|magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Estimated Bay salinity; Elphidium selseyense) earth science/paleoclimate/climate reconstructions|paleoceanography (depth,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sample identification,null,null,null,null,climate reconstructions|paleoceanography,null,null,C,core name) earth science/paleoclimate/climate reconstructions|paleoceanography (age,null,null,year Common Era,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Estimated Bay Temp; Elphidium selseyense) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (PTMC-3>LATITUDE 38.026833>LONGITUDE -76.219833) (PTXT-2-G>LATITUDE 38.3265>LONGITUDE -76.3925) (MD03-2661>LATITUDE 38.8868>LONGITUDE -76.3982) (RD-2209>LATITUDE 38.8863>LONGITUDE -76.3947) A new 2400-year paleoclimate reconstruction from Chesapeake Bay (CB) (eastern US) was compared to other paleoclimate records in the North Atlantic region to evaluate climate variability during the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA). Using Mg/Ca ratios from ostracodes and oxygen isotopes from benthic foraminifera as proxies for temperature and precipitation-driven estuarine hydrography, results show that warmest temperatures in CB reached 16-17C between 600 and 950 CE (Common Era), centuries before the classic European Medieval Warm Period (950-1100 CE) and peak warming in the Nordic Seas (1000-1400 CE). A series of centennial warm/cool cycles began about 1000 CE with temperature minima of ~8 to 9C about 1150, 1350, and 1650-1800 CE, and intervening warm periods (14-15C) centered at 1200, 1400, 1500 and 1600 CE. Precipitation variability in the eastern US included multiple dry intervals from 600 to 1200 CE, which contrasts with wet medieval conditions in the Caribbean. The eastern US experienced a wet LIA between 1650 and 1800 CE when the Caribbean was relatively dry. Comparison of the CB record with other records shows that the MCA and LIA were characterized by regionally asynchronous warming and complex spatial patterns of precipitation, possibly related to ocean-atmosphere processes. STUDY NOTES: Benthic foraminifer stable isotope (d18O and d13C) and Mg/Ca data, plus Bay temperature and salinity estimates for the past 2,400 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Cronin, T.M. Investigator : Hayo, K. Investigator : Thunell, R.C. Investigator : Dwyer, G.S. Investigator : Saenger, C.P. Investigator : Willard, D.A. 2017-02-23 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/21530 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-md03-2661.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-rd-2209.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptmc-3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptxt-2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-md03-2661.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-rd-2209.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptmc-3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptxt-2.txt English https://www.ncdc.noaa.gov/paleo/study/21530 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-composite.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-md03-2661.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-rd-2209.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptmc-3.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/cronin2010b/cronin2010b-ptxt-2.txt T.M. Cronin, K. Hayo, R.C. Thunell, G.S. Dwyer, C. Saenger, D.A. Willard2010The Medieval Climate Anomaly and Little Ice Age in Chesapeake Bay and the North Atlantic OceanPalaeogeography, Palaeoclimatology, Palaeoecology2972299-31010.1016/j.palaeo.2010.08.009http://www.sciencedirect.com/science/article/pii/S0031018210005031 START YEAR: -457 AD * END YEAR: 1995 AD -76.3982 38.026833 -76.219833 38.8868