#----------------------------------------------------------------------- # 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: hurricane.ncdc.noaa.gov/pls/paleox/f?P=519:1:::::P1_STUDY_ID:15934 # Online_Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/elsinore2013isotope.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: paleolimnology #-------------------- # Contribution_Date # Date: 2013-12-12 #-------------------- # Title # Study_Name: Latest Pleistocene to Holocene hydroclimates from Lake Elsinore, California #-------------------- # Investigators # Investigators: Kirby,M.E.;Feakins,S.J.;Bonuso,N.;Fantozzi,J.M.;Hiner,C.A.; #-------------------- # Description_and_Notes # Description: Provided Keywords - Younger Dryas, Hydrology, Geochemistry, Magnetic Susceptibility, Hydrogen isotopes, Deglacial, Dipping westerlies. #-------------------- # Publication # Authors: Matthew E. Kirby, Sarah J. Feakins, Nicole Bonuso, Joanna M. Fantozzi, Christine A. Hiner # Published_Date_or_Year: 2013 # Published_Title: Latest Pleistocene to Holocene hydroclimates from Lake Elsinore, California # Journal_Name: Quaternary Science Reviews # Volume: 76 # Edition: # Issue: # Pages: 1-15 # Report_Number: # DOI: http://dx.doi.org/10.1016/j.quascirev.2013.05.023 # Publication_Place: # Publisher: # ISBN: # Online_Resource: # Other_Reference_Details: # Full_Citation: # Abstract: The hydroclimate of the southwestern United States (US) region changed abruptly during the latest Pleistocene as the continental ice sheets over North America retreated from their most southerly extent. To investigate the nature of this change, we present a new record from Lake Elsinore, located 36 km inland from the Pacific Ocean in Southern California and evaluate it in the context of records across the coastal and interior southwest United States, including northwest Mexico. The sediment core recovered from Lake Elsinore provides a continuous sequence with multi-decadal resolution spanning 19e9 ka BP. Sedimentological and geochemical analyses reveal hydrologic variability. In particular, sand and carbonate components indicate abrupt changes at the Oldest Dryas (OD), BøllingeAllerød (BA), and Younger Dryas (YD) transitions, consistent with the timing in Greenland. Hydrogen isotope analyses of the C28 nalkanoic acids from plant leaf waxes (dDwax) reveal a long term trend toward less negative values across 19-9 ka BP. dDwax values during the OD suggest a North Pacific moisture source for precipitation, consistent with the dipping westerlies hypothesis. We find no isotopic evidence for the North American Monsoon reaching as far west as Lake Elsinore; therefore, we infer that wet/dry changes in the coastal southwest were expressed through winter-season precipitation, consistent with modern climatology. Comparing Lake Elsinore to other southwest records (notably Cave of Bells and Fort Stanton) we find coincident timing of the major transitions (OD to BA, BA to YD) and hydrologic responses during the OD and BA. The hydrologic response, however, varied during the YD consistent with a dipole between the coastal and interior southwest. The coherent pattern of hydrologic responses across the interior southwest US and northwest Mexico during the OD (wet), the BA (drier), and YD (wet) follows changes in the Atlantic Meridional Overturning Circulation, presumably via its combined influence on North Pacific winter storm tracks and the extent/magnitude of the North American Monsoon. In contrast, Lake Elsinore and the coastal southwest experiences a deglacial drying trend punctuated by abrupt change at the OD to BA and BA to YD transitions. This trend tracks rising greenhouse gases through the deglacial, with an apparent southward shift in westerly moisture sources adjusting to the retreating ice sheet. #------------------ # Funding_Agency # Funding_Agency_Name: U.S. National Science Foundation # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: American Chemical Society Petroleum Research Fund # Grant: #------------------ # Site_Information # Site_Name: Lake Elsinore # Location: California # Region: North America # Country: United States of America # Northernmost_Latitude: 33.6733 # Southernmost_Latitude: 33.6733 # Easternmost_Longitude: -117.3542 # Westernmost_Longitude: -117.3542 # Elevation: 379 #------------------ # Data_Collection # Collection_Name: LEDC10-isotope # Earliest_Year: 18634 # Most_Recent_Year: 9228 # Time_Unit: # Core_Length: # Notes: #------------------ # Species: #------------------ # Chronology: # Table 1. Age Data # Number Depth Range (cm) Average Depth (cm) Material LLNL AMS Results Calibration Results$ # ID delta13C(ä)# 14C Age (BP) ± 2-Sigma Range Age (cy BP) ^With Calculated Reservoir Effect (-915±163 yrs) # 1 1274-1275 1274.5 Gastropods N93630 -25 8,655 35 9,541-9,684 9,613 # 2 1274-1275 1274.5 Gastropods N93631 -25 8,710 35 9,548-9,780 9,664 # 3 1396-1398 1397 Bulk 94679 -25 10,155 45 11,685-12,030 11858* 10,943 # 4 1508-1510 1509 Bulk 94680 -22.9 10,950 40 12,648-12,964 12806* 11,891 # 5 1540-1542 1541 Bulk 94681 -25 11,650 60 13,334-13,691 13513* 12,598 # 6 1618-1620 1619 Bulk 94682 -24.6 12,200 35 13,887-14,202 14045* 13,130 # 7 1683-1685 1684 Mixed Discrete N95444 -25 12,140 280 13,437-15,067 14,252 # 8 1710-1711 1710.5 Mixed Discrete N95445 -25 12,460 120 14,091-15,090 14,591 # 9 1738-1739 1738.5 Mixed Discrete N95446 -25 13,420 230 15,390-16,932 16,161 # 10 1747-1748 1747.5 Bulk N94683 -26.4 13,880 40 16,782-17,144 16963* # 11 1747-1748 1747.5 Charcoal N94003 -25 13,260 35 15,578-16,699 16,139 # 12 1778-1779 1778.5 Wood N94004 -25 13,775 35 16,734-17,049 16,892 # 13 1823-1824 1823.5 Bulk N94684 -25 15,250 60 18,466-18,688 18577* # 14 1823-1824 1823.5 Charcoal N94005 -25 14,360 30 17,154-17,790 17,472 # 15 1823-1824 1823.5 Charcoal N94243 -25 14,310 30 17,082-17,706 17,394 # 16 1997-1999 1998 Seeds N94006 -25 16,580 40 19,461-19,936 19,699 # 17 2019-2020 2019.5 Bulk N94685 -22.5 17,490 70 20,447-21,257 20852* # 18 2019-2020 2019.5 Seeds N94007 -25 16,880 40 19,832-20,321 20,077 # 19 2081-2082 2081.5 Wood N94008 -25 17,980 180 20,911-22,128 21,520 # 20 2198-2199 2198.5 Seeds N94010 -25 19,630 40 23,134-23,779 23,457 # 21 2344-2345 2344.5 Charcoal N94245 -25 21,025 40 24,940-25,556 25,248 # 22 2344-2345 2344.5 Charcoal N94011 -25 21,120 70 24,834-25,494 25,164 # #delta13C values are the assumed values according to Stuiver et al. (1998) when given without decimal places; # delta13C values measured for the material itself are given with a single decimal place. # $CALIB 6.0.1 Program (Stuiver et al., 1998) # ^See Table 2 from Kirby et al. (2013) QSR Paper # *Not used in the age model for Kirby et al. (2013) QSR Paper # #---------------- # Variables # Short_name What,Material,Error,Units, Seasonality,Archive,Details,Method,Data_type ## depth-cm-drive Depth,,cm,,,,drive depth,,N ## age_calBP Age,,,,calendar years BP,,,,N ## dDleafwaxC28 DeltaD, C28 n-alkanoic acid,, per mil,,paleolimnology,,,N ## stdev-dDleafwaxC28 DeltaD, C28 n-alkanoic acid, standard deviation, per mil,,paleolimnology,,,N #---------------- # Data # Missing_Values: # # Data line format - tab-delimited text, variable short name as header depth-cm-drive age_calBP dDleafwaxC28 stdev-dDleafwaxC28 1201 9228 -129 2.5 1286 9713 -121 0.7 1401 10763 -130 1.1 1457 11414 -145 0.9 1485 11769 -143 0.9 1506 12047 -154 5.8 1533 12419 -151 1.6 1563 12849 -151 0.2 1596 13341 -149 2.5 1641 14040 -146 3 1677 14620 -153 4.3 1706 15098 -170 3.3 1735 15585 -184 2.6 1768 16147 -182 2.5 1811 16889 -169 0.1 1841 17412 -192 1.7 1865 17831 -184 7 1911 18634 -191 0.3