Southern South America Multiproxy 500 Year Precipitation Reconstructions Neukom, R.; Luterbacher, J.; Villalba, R.; Küttel, M.; Frank, D.C.; Jones, P.D.; Grosjean, M.; Esper, J.; Lopez, L.; Wanner, H. Neukom, R. Luterbacher, J. Villalba, R. Küttel, M. Frank, D.C. Jones, P.D. Grosjean, M. Esper, J. Lopez, L. Wanner, H. PAGES 2k Network PAGES LOTRED SA2k Precipitation Reconstruction earth science/paleoclimate/climate reconstructions (precipitation,multiple proxies,null,millimeter,Dec-Feb,climate reconstructions,anomalized,null,N,anomalies wrt 1931-1995 [mm]) earth science/paleoclimate/climate reconstructions (precipitation,multiple proxies,null,millimeter,Jun-Aug,climate reconstructions,anomalized,null,N,null) earth science/paleoclimate/climate reconstructions (age,null,null,year Common Era,null,climate reconstructions,null,null,N,null) earth science/paleoclimate/reconstructions (Southern South America>LATITUDE -42.25>LONGITUDE -55.25) We present the first spatially and temporally highly resolved gridded reconstruction of multi-centennial precipitation variability for southern South America (SSA). A novel reconstruction approach of deriving 10,000 ensemble members based on varying predictor networks and methodological settings allows the identification of spatiotemporal changes in SSA precipitation and associated uncertainties. The summer and winter reconstructions back to AD 1498 and AD 1590, respectively, provide new evidence for multi-centennial increase in summer precipitation and an opposing decrease in winter precipitation into the 20th century. The drying in winter is significant over large parts of SSA, whereas the patterns for summer, possibly representing convective rainfall, have displayed high spatial variability. The fact that such long-term seasonal and spatial changes have occurred in the past, underlines the complex form that hydroclimatic variability might have in the future. This emphasizes the need for careful adaptation strategies as governments become attuned to the realities of climate change. STUDY NOTES: This dataset contains the austral summer (DJF) and winter (JJA) precipitation reconstructions for southern South America (SSA) as presented in Neukom et al. 2010. The data are medians of an ensemble of 10,000 reconstructions derived using PCR reconstruction technique (details see paper) and cover the following periods: Summer: 1498-1995 Winter: 1590-1995 The predictor network consists of 33 (31) proxy records and 41 (42) instrumental series for summer (winter). The spatially explicit reconstructions are provided in 0.5°x0.5° resolution and in NetCDF and text format: Summer: SSA_PP_Recon_DJF_anom_1498-1995.nc SSA_PP_Recon_DJF_anom_1498-1995.txt Winter: SSA_PP_Recon_JJA_anom_1590-1995.nc SSA_PP_Recon_JJA_anom_1590-1995.txt The text file contain the following columns: Year, Precipitation anomalies wrt 1931-1995 [mm] of grid-cell 1, precipitation anomalies of grid-cell 2, ... , precipitation anomalies of grid-cell 9191 The grid cells are structured as follows: There are 9191 cells representing 101 longitudes (80.25°W to 30.25°W) and 91 latitudes (64.75°S to 19.75°S) Cell 1 represents the southwestern corner of the area (80.25°W,64.75°S) Cell 2 represents the next cell eastward of cell 1 (79.75°W,64.75°S) ... Cell 101 represent the southeastern corner of the area (30.25°W,64.75°S) Cell 102 represents the coordinates (80.25°W,64.25°S) ... Cell 9191 represents the northeastern corner of the area (30.25°W,19.75°S) Only the land-gridcells (2358 cells) contain data, all other cells have "NA" values. Some of the land gridcells have also missing values (mainly in the Atacama region), because the std. dev. at these locations is <0.1 in the instrumental calibration grid and the corresponding grid cells were not included into the reconstructions. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Neukom, R. Investigator : Luterbacher, J. Investigator : Villalba, R. Investigator : Küttel, M. Investigator : Frank, D.C. Investigator : Jones, P.D. Investigator : Grosjean, M. Investigator : Esper, J. Investigator : Lopez, L. Investigator : Wanner, H. 2010-08-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/9956 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/neukom2010b.zip https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/readme-neukom2010b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/neukom2010b.zip https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/readme-neukom2010b.txt English https://www.ncdc.noaa.gov/paleo/study/9956 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/neukom2010b.zip https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/neukom2010b/readme-neukom2010b.txt Neukom, R., J. Luterbacher, R. Villalba, M. Küttel, D. Frank, P.D. Jones, M. Grosjean, J. Esper, L. Lopez, and H. Wanner. 2010. Multi-centennial summer and winter precipitation variability in southern South America. Geophys. Res. Lett., 37, L14708, doi:10.1029/2010GL043680. START YEAR: 1498 AD * END YEAR: 1995 AD -80.25 -64.75 -30.25 -19.75