# Qingtian and Hulu Caves, China Deglacial Stalagmite Stable Isotope Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # # 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/19399 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/qingtian2014qt20.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Speleothems # # Parameter_Keywords: oxygen isotopes, carbon isotopes #-------------------- # Contribution_Date # Date: 2015-10-27 #-------------------- # Title # Study_Name: Qingtian and Hulu Caves, China Deglacial Stalagmite Stable Isotope Data #-------------------- # Investigators # Investigators: Zhang, W.; Wu, J.; Wang, Y.; Wang, Y.; Cheng, H.; Kong, X.; Duan, F. #-------------------- # Description_and_Notes # Description: Oxygen isotope (d18O) data from Qingtian and Hulu Caves, China plus carbon isotope (d13C) data from Hulu Cave, for the 'Mystery Interval' 17.5-14.5 ka. #-------------------- # Publication # Authors: Weihong Zhang, Jiangying Wu, Yi Wang, Yongjin Wang, Hai Cheng, Xinggong Kong, Fucai Duan # Published_Date_or_Year: 2014-07-01 # Published_Title: A detailed East Asian monsoon history surrounding the 'Mystery Interval' derived from three Chinese speleothem records # Journal_Name: Quaternary Research # Volume: 82 # Edition: # Issue: 1 # Pages: 154-163 # Report_Number: # DOI: 10.1016/j.yqres.2014.01.010 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0033589414000131 # Full_Citation: # Abstract: The 'Mystery Interval' (MI, 17.5-14.5 ka) was the first stage of the last deglaciation, a key interval for understanding mechanisms of glacial-interglacial cycles. To elucidate possible causes of the MI, here we present three high-resolution, precisely dated oxygen-isotope records of stalagmites from Qingtian and Hulu Caves in China, reflecting changes in the East Asian summer monsoon (EASM) then. Based on well-established chronologies using precise 230Th dates and annual-band counting results, the two-cave d18O profiles of ~ 7-yr resolution match well at decadal timescales. Both of the two-cave records document an abrupt weakening (2 per mil of d18O rise within 20 yr) in the EASM at ~ 16.1 ka, coinciding with the transition of the two-phased MI reconstructed from New Mexico's Lake Estancia. Our results indicate that the maximum southward displacement of the Intertropical Convergence Zone and associated southward shift of polar jet stream may generate this two-phase feature of the MI during that time. We also discover a linear relationship among decreasing EASM intensity, rising atmospheric CO2 and weakening Atlantic Meridional Overturning Circulation between the MI and Younger Dryas episodes, suggesting a strong coupling of atmospheric/oceanic circulations in response to the millennial-scale forcing, which in turn regulates global climate changes and carbon cycles. #------------------ # Funding_Agency # Funding_Agency_Name: National Natural Science Foundation of China # Grant: 40972111, 41130210 #------------------ # Funding_Agency # Funding_Agency_Name: Research and Innovation Project for College Graduates of Jiangsu Province # Grant: CXZZ13_0408 #------------------ # Site_Information # Site_Name: Qingtian Cave # Location: Asia>Eastern Asia>China # Country: China # Northernmost_Latitude: 31.3333 # Southernmost_Latitude: 31.3333 # Easternmost_Longitude: 110.3667 # Westernmost_Longitude: 110.3667 # Elevation: 1630 m #------------------ # Data_Collection # Collection_Name: Qingtian2014Qt20 # Earliest_Year: 17523 # Most_Recent_Year: 15981 # Time_Unit: Cal. Year BP # Core_Length: m # Notes: #------------------ # Chronology_Information # Chronology: # # # Table 1. 230Th dating results for stalagmites QT20 and QT29 from Qingtian Cave (central China) and stalagmite YT from Hulu Cave (eastern China). # # Sample Depth 238U 232Th d234U 230Th/238U 230Th Age/yr 230Th Age/yr d234Uinitial # ID (mm) (ppb) (ppt) (Measured) (Activity) (Uncorrected) (Corrected) (Corrected) # QT20 23 1760.7 ±5.2 2916 ±52 -186.2 ±1.9 0.1114 ±0.0009 16165 ±148 16105 ±151 195 ±2.0 # QT20 81 1678.4 ±0.12 6331 ±65 -207.1 ±0.4 0.1133 ±0.0002 16931 ±27 16734 ±103 -217 ±0.4 # QT20 169 1128.2 ±3.6 1112 ±60 -181.5 ±2.5 0.1206 ±0.0010 17510 ±174 17474 ±174 -191 ±2.7 # QT29 56 1660.5 ±2.1 114 ±8 213.9 ±1.6 0.1786 ±0.0007 17272 ±74 17271 ±74 225 ±2 # QT29 107 877.1 ±1.6 622 ±18 221.8 ±2.2 0.1856 ±0.0008 17907 ±91 17890 ±91 233.3 ±2.3 # QT29 164 1985.4 ±4.1 137 ±17 265.5 ±2.8 0.1955 ±0.0007 18218 ±82 18216 ±82 279.6 ±2.9 # YT 163 189.2 ±0.4 250 ±5 163.8 ±2.4 0.1788 ±0.0014 18101 ±163 18069 ±164 172.4 ±2.5 # Errors are 2 sigma analytical errors. # Decay constant values are L230 = 9.1577 x 10-6 yr-1, L234 = 2.8263 x 10-6 yr-1, L238 = 1.55125 x 10-10 yr-1. # Corrected 230Th ages assume an initial 230Th/232Th atomic ratio of (4.4±2.2) x10-6. # Corrected 230Th ages are presented in years before 2000 AD. # # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_mm depth, , , mm, , , , ,N ## age_calBP age, , , calendar years before present, , , , ,N ## d18OcarbVPDB delta18O, calcium carbonate, , per mil VPDB, ,speleothem, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth_mm age_calBP d18OcarbVPDB 1 15981 -5.442 2 15983 -5.312 3 15985 -4.94 4 15988 -4.867 5 15991 -4.857 6 15995 -4.962 7 15998 -5.158 8 16000 -5.128 9 16002 -5.121 10 16005 -4.744 11 16009 -5.154 12 16011 -5.508 13 16015 -5.316 14 16020 -5.21 15 16027 -4.974 16 16032 -4.553 17 16039 -4.759 18 16046 -5.156 19 16053 -5.363 20 16062 -4.497 21 16071 -4.884 22 16079 -4.622 23 16091 -4.945 24 16107 -4.682 24.07 16108 -4.387 24.14 16109 -4.494 24.21 16109.5 -4.397 24.29 16110 -4.679 24.36 16111 -4.578 24.43 16111.5 -4.681 24.50 16112 -4.582 24.57 16113 -4.671 24.64 16114 -4.833 24.71 16115 -5.163 24.79 16116 -5.482 24.86 16117 -5.393 24.93 16118 -5.73 25.00 16119 -5.663 25.07 16119.5 -5.733 25.14 16120 -5.975 25.21 16120.5 -5.789 25.29 16121 -5.862 25.36 16121.5 -5.775 25.43 16122 -5.981 25.50 16122.5 -5.763 25.57 16123 -5.997 25.64 16124 -6.163 25.71 16124.5 -6.371 25.79 16125 -6.419 25.86 16125.5 -6.593 25.93 16126 -6.512 26.00 16126.3 -6.546 26.05 16126.7 -6.359 26.10 16127 -6.087 26.14 16127.3 -6.058 26.19 16127.7 -6.028 26.24 16128 -5.957 26.29 16128.5 -5.872 26.33 16129 -6.083 26.38 16129.3 -6.231 26.43 16129.7 -6.315 26.48 16130 -6.314 26.52 16131 -6.461 26.57 16131.5 -6.445 26.62 16132 -6.622 26.67 16132.5 -6.611 26.71 16133 -6.502 26.76 16133.5 -6.672 26.81 16134 -6.614 26.86 16135 -6.646 26.90 16135.5 -6.56 26.95 16136 -6.773 27 16137 -6.456 28 16143 -6.227 29 16156 -6.101 30 16164 -5.953 31 16171 -5.5 32 16178 -5.92 33 16191 -4.889 34 16206 -5.463 35 16239 -6.049 35.5 16259 -6.484 36 16270 -6.449 37 16281 -6.592 38 16289 -5.985 39 16297 -5.728 40 16307 -5.367 41 16315 -5.698 42 16326 -6.151 43 16335 -6.172 44 16345 -6.123 45 16352 -5.822 46 16362 -6.173 47 16372 -6.017 48 16381 -6.525 49 16391 -5.97 50 16401 -6.195 51 16407 -6.422 52 16414 -6.516 53 16421 -6.012 54 16428 -5.861 55 16437 -5.91 56 16445 -6.05 57 16456 -5.441 58 16463 -5.746 59 16469 -5.399 60 16475 -5.687 61 16479 -6.123 62 16481 -6.218 63 16485 -6.834 64 16491 -6.611 65 16497 -6.572 66 16505 -6.163 67 16511 -6.276 68 16519 -6.799 69 16527 -6.363 70 16532 -5.882 71 16538 -6.215 72 16545 -5.975 73 16551 -5.824 74 16556 -6.016 75 16562 -5.57 76 16567 -6.474 77 16572 -6.407 78 16577 -5.985 79 16583 -6.65 80 16589 -6.648 81 16594 -6.781 82 16599 -6.251 83 16604 -5.475 84 16608 -5.5 85 16615 -5.497 86 16622 -6.17 87 16630 -6.384 88 16641 -5.93 89 16646 -6.218 90 16652 -6.195 91 16658 -5.299 92 16666 -5.991 93 16674 -6.235 94 16682 -6.875 95 16690 -6.682 96 16699 -7.503 97 16707 -6.746 98 16712 -6.59 99 16718 -6.543 100 16722 -6.391 101 16728 -6.794 102 16736 -7.402 103 16746 -6.708 104 16752 -6.773 105 16762 -6.53 106 16770 -6.56 107 16777 -6.325 108 16785 -7.057 109 16791 -6.931 110 16800 -6.583 111 16808 -7.074 112 16815 -6.421 113 16821 -6.985 114 16827 -7.178 115 16836 -6.466 116 16845 -6.737 117 16856 -7.039 118 16868 -6.816 119 16883 -6.398 120 16897 -7.366 121 16911 -7.121 122 16919 -6.492 123 16928 -6.79 124 16938 -6.575 125 16952 -6.314 126 16968 -6.241 127 16983 -7.021 128 16998 -6.719 129 17012 -6.71 130 17026 -6.796 131 17039 -6.145 132 17050 -5.626 133 17058 -6.369 134 17070 -5.951 135 17088 -5.951 136 17101 -6.838 137 17110 -6.879 138 17125 -6.889 139 17138 -7.176 140 17150 -6.796 141 17159 -7.455 142 17166 -7.27 143 17178 -7 144 17190 -6.402 145 17201 -6.62 146 17214 -6.922 147 17227 -6.813 148 17239 -6.366 149 17251 -6.639 150 17260 -5.683 151 17269 -5.673 152 17278 -6.601 153 17287 -6.609 154 17298 -7.182 155 17309 -6.205 156 17319 -6.194 157 17337 -6.999 158 17350 -7.101 159 17369 -6.714 160 17382 -6.883 161 17395 -6.817 162 17408 -6.678 163 17422 -7.129 164 17435 -7.381 165 17449 -6.926 166 17468 -7.141 167 17475 -7.063 168 17483 -6.999 169 17497 -7.221 170 17523 -7.156