#----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/15090 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/italy/ledro2013thickness-summer.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology #-------------------- # Contribution_Date # Date: 2013-08-16 #-------------------- # Title # Study_Name: A 2000 year long seasonal record of floods in the southern # European Alps, Lake Ledro, Northern Italy #-------------------- # Investigators # Investigators: Wirth,S.B.;Gilli,A.;Simonneau,A.;Ariztegui,D.;Vannière,B.;Glur,L.;Chapron,E.;Magny,M.;Anselmetti,F.S.; #-------------------- # Description_and_Notes # Description: This dataset contains ages and thicknesses of individual flood layers ('thickness' files) as well as 30-year moving sums of flood events ('counts' files) for all seasons. The dating of the flood layers is based on varve counting and the age-model error of ±2.5% is estimated based on the comparison with five radiocarbon ages. #-------------------- # Publication # Authors: Wirth, S. B., A. Gilli, A. Simonneau, D. Ariztegui, # B. Vannière, L. Glur, E. Chapron, M. Magny, and F. S. Anselmetti # Published_Date_or_Year: 2013 # Published_Title: A 2000 year long seasonal record of floods in the southern # European Alps # Journal_Name: Geophysical Research Letters # Volume: 40 # Edition: # Issue: # Pages: 4025–4029 # Report_Number: # DOI: 10.1002/grl.50741 # Publication_Place: # Publisher: # ISBN: # Online_Resource: # Other_Reference_Details: # Full_Citation: # Abstract: Knowledge of past natural flood variability and controlling climate factors is of high value since it can be useful to refine projections of the future flood behavior under climate warming. In this context, we present a seasonally resolved 2000 year long flood frequency and intensity reconstruction from the southern Alpine slope (North Italy) using annually laminated (varved) lake sediments. Floodsoccurred predominantly during summer and autumn, whereas winter and spring events were rare. The all-season flood frequency and, particularly, the occurrence of summer events increased during solar minima, suggesting solarinduced circulation changes resembling negative conditions of the North Atlantic Oscillation as controlling atmospheric mechanism. Furthermore, the most extreme autumn events occurred during a period of warm Mediterranean sea surface temperature. Interpreting these results in regard to present climate change, our data set proposes for a warming scenario, a decrease in summer floods, but an increase in the intensity of autumn floods at the South-Alpine slope. #------------------ # Funding_Agency # Funding_Agency_Name: Swiss National Science Foundation (SNF) # Grant: 200021-121909 #------------------ # Funding_Agency # Funding_Agency_Name: French ANR (project LAMA) # Grant: #------------------ # Site_Information # Site_Name: Lake Ledro # Location: # Region: Northern Italy # Country: Italy # Northernmost_Latitude:45.876667 # Southernmost_Latitude:45.876667 # Easternmost_Longitude:10.750556 # Westernmost_Longitude:10.750556 # Elevation: 653 #------------------ # Data_Collection # Collection_Name: Thickness Summer # Earliest_Year: 2066 # Most_Recent_Year: -48 # Time_Unit: # Core_Length: # Notes: Individual flood layers. Measured Parameters: Seasonality and thickness of flood layers. #------------------ # Species: #------------------ # Chronology: #---------------- # Variables # Short_name What,Material,Error,Units, Seasonality,Archive,Details,Method,Data_type ## age_calBP Age,,,,calendar years BP,,,,N ## thickness-flood-summer Thickness,flood layer,,mm,summer,paleolimnology,,microfacies analysis,N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: age_calBP thickness-flood-summer -48 0.8 -46 2.5 -16 5.7 -3 1.2 18 0.3 35 1.7 43 4.2 53 0.9 57 25.0 71 1.8 73 0.5 74 11.9 96 1.1 98 28.0 114 27.3 117 6.5 118 0.9 120 0.3 123 1.3 127 0.4 133 1.2 141 0.3 163 9.4 171 0.5 179 1.9 179 8.5 180 1.0 191 4.0 198 2.3 199 1.9 208 0.3 212 4.5 215 0.3 227 36.5 228 0.7 229 0.5 231 0.3 234 0.2 235 0.5 247 0.3 253 0.6 259 0.9 264 2.2 270 0.5 276 2.1 284 5.0 285 0.6 289 1.0 290 1.7 292 0.9 355 0.6 380 2.0 393 0.7 395 0.2 408 48.0 410 2.3 417 3.0 429 0.5 434 0.3 441 31.2 443 0.9 451 5.5 452 0.3 466 0.9 468 0.2 496 22.8 566 7.0 595 2.7 621 1.2 631 0.5 663 0.5 667 0.4 677 0.3 683 3.9 688 0.2 690 0.4 703 44.1 707 13.5 709 0.7 713 0.2 722 0.2 730 6.5 737 3.4 739 0.9 741 0.4 766 24.1 795 0.4 798 0.7 807 0.7 831 0.4 847 0.2 915 1.4 1008 0.3 1106 0.3 1162 9.6 1175 0.7 1234 1.0 1235 0.6 1246 0.8 1250 0.6 1259 1.4 1265 4.4 1269 0.8 1272 0.5 1357 2.4 1422 2.3 1448 0.5 1471 0.8 1473 0.6 1551 0.3 1631 0.3 1682 1.3 1725 0.5 1754 0.2 1761 0.7 1768 0.5 1770 0.5 1815 1.6 1816 0.7 1825 0.3 1851 0.6 1855 0.5 1859 2.5 1947 0.5 1971 0.7 2035 0.5 2056 0.3 2066 0.8