noaa-recon-23032 Scandinavia Last Millennium Summer SPEI Hydroclimate Reconstruction Seftigen, K.; Goosse, H.; Klein, F.; Chen, D. Scandinavia Last Millennium Summer SPEI Hydroclimate Reconstruction 2017-11-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23032 Investigator K. Seftigen Investigator H. Goosse Investigator F. Klein Investigator D. Chen earth science paleoclimate climate reconstructions|tree ring age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring standardized precipitation evapotranspiration index,ring width,null,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,Reconstructed average Scandinavian June SPEI (2-month scale) earth science paleoclimate climate reconstructions|tree ring standardized precipitation evapotranspiration index,ring width,one root mean square error lower bound,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,Reconstructed average Scandinavian June SPEI (2-month scale) plus RMSE error earth science paleoclimate climate reconstructions|tree ring standardized precipitation evapotranspiration index,ring width,one root mean square error upper bound,dimensionless,Jun,climate reconstructions|tree ring,null,null,N,Reconstructed average Scandinavian June SPEI (2-month scale) minus RMSE error earth science paleoclimate reconstructions precipitation geoscientificInformation Other Hydroclimate Reconstruction 1000 AD 1995 AD 950 cal yr BP -45 cal yr BP Complete 55 65 5 30 Continent Europe Northern Europe Scandinavia>LATITUDE >LONGITUDE 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 Kristina Seftigen, Hugues Goosse, Francois Klein, and Deliang Chen 2017 Climate of the Past 13 12 1831-1850 10.5194/cp-13-1831-2017 https://www.clim-past.net/13/1831/2017/

The integration of climate proxy information with general circulation model (GCM) results offers considerable potential for deriving greater understanding of the mechanisms underlying climate variability, as well as unique opportunities for out-of-sample evaluations of model performance. In this study, we combine insights from a new tree-ring hydroclimate reconstruction from Scandinavia with projections from a suite of forced transient simulations of the last millennium and historical intervals from the CMIP5 and PMIP3 archives. Model simulations and proxy reconstruction data are found to broadly agree on the modes of atmospheric variability that produce droughts-pluvials in the region. Despite these dynamical similarities, large differences between simulated and reconstructed hydroclimate time series remain. We find that the GCM-simulated multi-decadal and/or longer hydroclimate variability is systematically smaller than the proxy-based estimates, whereas the dominance of GCM-simulated high-frequency components of variability is not reflected in the proxy record. Furthermore, the paleoclimate evidence indicates in-phase coherencies between regional hydroclimate and temperature on decadal timescales, i.e., sustained wet periods have often been concurrent with warm periods and vice versa. The CMIP5-PMIP3 archive suggests, however, out-of-phase coherencies between the two variables in the last millennium. The lack of adequate understanding of mechanisms linking temperature and moisture supply on longer timescales has serious implications for attribution and prediction of regional hydroclimate changes. Our findings stress the need for further paleoclimate data-model intercomparison efforts to expand our understanding of the dynamics of hydroclimate variability and change, to enhance our ability to evaluate climate models, and to provide a more comprehensive view of future drought and pluvial risks. STUDY NOTES: Reconstruction of summer (June, aggregated over a 2-month time scale) Standardized Precipitation Evapotranspiration Index (SPEI) based on 25 tree-ring width records

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/scandinavia2017spei.txt Formatted Text Data File; Scandinavia Summer SPEI Reconstruction USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11