Guliya, China Ice Core Oxygen Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Guliya, China Ice Core Oxygen Isotope Data LAST UPDATE: 9/2004 (Original receipt by WDC Paleo) CONTRIBUTOR: Ellen Mosley-Thompson, The Ohio State University IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2004-057 SUGGESTED DATA CITATION: Thompson, L.G., et al.. 2004. Guliya, China Ice Core Oxygen Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2004-057. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCES: Thompson, L.G., T. Yao, M.E. Davis, K.A. Henderson, E. Mosley-Thompson, P.N. Lin, J. Beer, H.-A. Synal, J. Cole-Dai, and J.F. Bolzan. 1997. Tropical climate instability: The last glacial cycle from a Qinghai-Tibetan ice core. Science, 276, 1821-25. Thompson, L.G., E. Mosley-Thompson, M.E. Davis, P.-N. Lin, K. Henderson, and T.A. Mashiotta. 2003. Tropical glacier and ice core evidence of climate change on annual to millennial time scales. Climatic Change, 59, 137-155. ABSTRACT (Thompson et al. 1997): An ice core record from the Guliya ice cap on the Qinghai-Tibetan Plateau provides evidence of regional climatic conditions over the last glacial cycle. 36Cl data suggest that the deepest 20 meters of the core may be more than 500,000 years old. The d18O change across Termination I is ~5.4 per mil, similar to that in the Huascaran (Peru) and polar ice cores. Three Guliya interstadials (Stages 3, 5a, and 5c) are marked by increases in d18O values similar to that of the Holocene and Eemian (~124,000 years ago). The similarity of this pattern to that of CH4 records from polar ice cores indicates that global CH4 levels and the tropical hydrological cycle are linked. The Late Glacial Stage record contains numerous 200-year oscillations in d18O values and in dust, NH4+, and NO3- levels. ABSTRACT (Thompson et al. 2003): This paper examines the potential of the stable isotopic ratios, 18O/16O (d18Oice) and 2H/1H (dDice), preserved in mid to low latitude glaciers as a tool for paleoclimate reconstruction. Ice cores are particularly valuable as they contain additional data, such as dust concentrations, aerosol chemistry, and accumulation rates, that can be combined with the isotopic information to assist with inferences about the regional climate conditions prevailing at the time of deposition. We use a collection of multi-proxy ice core histories to explore the d18O-climate relationship over the last 25,000 years that includes both Late Glacial Stage (LGS) and Holocene climate conditions. These results suggest that on centennial to millennial time scales atmospheric temperature is the principal control on the d18Oice of the snowfall that sustains these high mountain ice fields. Decadally averaged d18Oice records from three Andean and three Tibetan ice cores are composited to produce a low latitude d18Oice history for the last millennium. Comparison of this ice core composite with the Northern Hemisphere proxy record (1000–2000 A.D.) reconstructed by Mann et al. (1999) and measured temperatures (1856–2000) reported by Jones et al. (1999) suggests the ice cores have captured the decadal scale variability in the global temperature trends. These ice cores show a 20th century isotopic enrichment that suggests a large scale warming is underway at low latitudes. The rate of this isotopically inferred warming is amplified at higher elevations over the Tibetan Plateau while amplification in the Andes is latitude dependent with enrichment (warming) increasing equatorward. In concert with this apparent warming, in situ observations reveal that tropical glaciers are currently disappearing. A brief overview of the loss of these tropical data archives over the last 30 years is presented along with evaluation of recent changes in mean d18Oice composition. The isotopic composition of precipitation should be viewed not only as a powerful proxy indicator of climate change, but also as an additional parameter to aid our understanding of the linkages between changes in the hydrologic cycle and global climate. GEOGRAPHIC REGION: Southwest China PERIOD OF RECORD: 1990 - 1000 A.D. DESCRIPTION: Decadally averaged d18O (1990 - 1000 A.D.) from figure 5 of Thompson et al. 2003. Core drilled in 1992 Core location: 35°179N, 81°299E Data: Decadal averages oxygen isotopic ratio Guliya d18O date at Sajama data ok checked Huascaran Core 2 top of d18O decadal avgs interval A.D. to decadbottom first value 1990 to 1993 2000 1990 -16.91 -0.11 2000 1990 -15.87 3.09 1990 -12.35 1990 1980 -17.20 -0.31 1990 1980 -17.32 1.36 1980 -13.75 1980 1970 -18.72 -1.31 1980 1970 -18.20 0.29 1970 -12.63 1970 1960 -16.40 0.22 1970 1960 -16.46 2.38 1960 -13.74 1960 1950 -16.39 0.23 1960 1950 -17.88 0.68 1950 -12.78 1950 1940 -15.41 0.88 1950 1940 -17.18 1.52 1940 -13.46 1940 1930 -16.92 -0.12 1940 1930 -16.93 1.82 1930 -13.29 1930 1920 -17.88 -0.76 1930 1920 -17.39 1.27 1920 -14.22 1920 1910 -17.82 -0.72 1920 1910 -18.10 0.41 1910 -14.18 1910 1900 -16.13 0.40 1910 1900 -17.84 0.73 1900 -14.10 1900 1890 -17.97 -0.82 1900 1890 -18.99 -0.65 1890 -12.28 1890 1880 -16.86 -0.08 1890 1880 -17.19 1.51 1880 -15.86 1880 1870 -19.51 -1.84 1880 1870 -16.50 2.34 1870 -14.77 1870 1860 -17.82 -0.72 1870 1860 -17.49 1.15 1860 -15.29 1860 1850 -17.06 -0.21 1860 1850 -17.87 0.69 1850 -14.75 1850 1840 -16.35 0.26 1850 1840 -17.96 0.58 1840 -17.14 1840 1830 -16.06 0.45 1840 1830 -17.29 1.38 1830 -14.38 1830 1820 -19.77 -2.01 1830 1820 -16.64 2.17 1820 -13.59 1820 1810 -18.71 -1.31 1820 1810 -18.18 0.32 1810 -17.83 1810 1800 -17.48 -0.49 1810 1800 -17.13 1.58 1800 -15.17 1800 1790 -15.13 1.07 1800 1790 -16.41 2.45 1790 -14.39 1790 1780 -16.90 -0.11 1790 1780 -16.71 2.08 1780 -13.96 1780 1770 -17.23 -0.33 1780 1770 -18.46 -0.01 1770 -14.86 1770 1760 -18.22 -0.98 1770 1760 -17.23 1.46 1760 -15.60 1760 1750 -16.59 0.10 1760 1750 -18.33 0.15 1750 -15.16 1750 1740 -18.32 -1.05 1750 1740 -18.14 0.37 1740 -13.24 1740 1730 -18.60 -1.23 1740 1730 -19.34 -1.07 1730 -14.92 1730 1720 -17.20 -0.31 1730 1720 -20.06 -1.93 1720 -15.11 1720 1710 -18.35 -1.07 1720 1710 -19.57 -1.34 1710 -15.60 1710 1700 -18.42 -1.11 1710 1700 -18.16 0.35 1700 -14.11 1700 1690 -16.75 -0.01 1700 1690 -18.74 -0.35 1690 -15.50 1690 1680 -17.65 -0.60 1690 1680 -19.04 -0.71 1680 -15.14 1680 1670 -16.60 0.09 1680 1670 -18.97 -0.62 1670 -13.44 1670 1660 -16.56 0.12 1670 1660 -19.12 -0.80 1660 -12.54 1660 1650 -18.22 -0.98 1660 1650 -19.19 -0.88 1650 -13.44 1650 1640 -17.57 -0.55 1650 1640 -19.27 -0.98 1640 -14.15 1640 1630 -17.68 -0.62 1640 1630 -19.29 -1.00 1630 -12.91 1630 1620 -20.36 -2.40 1630 1620 -19.39 -1.12 1620 -13.44 1620 1610 -14.50 1.48 1620 1610 -18.85 -0.48 1610 -13.70 1610 1600 -16.21 0.35 1610 1600 -19.59 -1.36 1600 -13.80 1600 1590 -17.07 -0.22 1600 1590 -18.74 -0.35 1590 -14.20 1590 1580 -16.06 0.45 1590 1580 -19.76 -1.57 1580 -14.41 1580 1570 -17.35 -0.41 1580 1570 -19.37 -1.11 1570 -14.36 1570 1560 -16.75 -0.01 1570 1560 -19.58 -1.36 1560 -11.71 1560 1550 -17.54 -0.53 1560 1550 -18.77 -0.39 1550 -14.56 1550 1540 -20.27 -2.34 1550 1540 -19.19 -0.89 1540 -14.68 1540 1530 -17.09 -0.23 1540 1530 -19.21 -0.91 1530 -12.87 1530 1520 -14.94 1.19 1530 1520 -19.04 -0.71 1520 -15.19 1520 1510 -17.67 -0.62 1520 1510 -19.69 -1.49 1510 -14.84 1510 1500 -15.16 1.05 1510 1500 -19.15 -0.83 1500 -16.23 1500 1490 -16.82 -0.05 1500 1490 -19.58 -1.35 1490 -14.67 1490 1480 -17.99 -0.83 1490 1480 -19.44 -1.19 1480 -13.07 1480 1470 -17.23 -0.33 1480 1470 -19.31 -1.03 1470 -13.17 1470 1460 -13.92 1.87 1470 1460 -19.20 -0.90 1460 -14.57 1460 1450 -17.68 -0.62 1460 1450 -19.03 -0.70 1450 -12.17 1450 1440 -17.47 -0.49 1450 1440 -19.10 -0.78 1440 -15.50 1440 1430 -17.94 -0.80 1440 1430 -19.64 -1.42 1430 -13.14 1430 1420 -11.68 3.35 1430 1420 -19.04 -0.71 1420 -13.42 1420 1410 -16.55 0.12 1420 1410 -19.25 -0.95 1410 -12.96 1410 1400 -16.69 0.03 1410 1400 -19.06 -0.73 1400 -12.26 1400 1390 -15.33 0.93 1400 1390 -18.80 -0.42 1390 -12.52 1390 1380 -16.99 -0.17 1390 1380 -18.65 -0.24 1380 -14.24 1380 1370 -13.79 1.95 1380 1370 -18.56 -0.13 1370 -13.92 1370 1360 -15.43 0.87 1370 1360 -18.93 -0.58 1360 -14.58 1360 1350 -13.79 1.95 1360 1350 -19.23 -0.94 1350 -14.17 1350 1340 -16.14 0.40 1350 1340 -18.96 -0.61 1340 -14.83 1340 1330 -18.39 -1.10 1340 1330 -18.80 -0.42 1330 -13.34 1330 1320 -17.73 -0.66 1330 1320 -18.20 0.30 1320 -15.78 1320 1310 -14.68 1.36 1320 1310 -18.54 -0.11 1310 -13.93 1310 1300 -17.31 -0.38 1310 1300 -18.35 0.11 1300 -14.69 1300 1290 -16.55 0.12 1300 1290 -18.46 -0.01 1290 -16.21 1290 1280 -14.16 1.71 1290 1280 -18.84 -0.47 1280 -17.57 1280 1270 -15.95 0.52 1280 1270 -18.62 -0.20 1270 -16.91 1270 1261 -17.11 -0.25 1270 1260 -18.49 -0.05 1260 -17.58 1260 1250 -16.79 -0.03 1260 1250 -18.12 0.39 1250 -14.23 1250 1240 -16.72 0.01 1250 1241 -18.41 0.05 1240 -13.81 1240 1231 -15.12 1.07 1240 1230 -18.71 -0.31 1230 -13.53 1230 1220 -15.90 0.55 1230 1220 -18.27 0.21 1220 -13.18 1220 1210 -15.48 0.83 1220 1210 -18.54 -0.11 1210 -15.38 1210 1201 -18.02 -0.85 1210 1200 -18.44 0.01 1200 -15.49 1200 1190 -16.12 0.41 1200 1190 -18.31 0.16 1190 -12.89 1190 1181 -15.03 1.13 1190 1180 -17.68 0.92 1180 -13.46 1180 1170 -15.91 0.55 1180 1170 -17.81 0.77 1170 -12.77 1170 1160 -16.42 0.21 1170 1160 -18.21 0.29 1160 -13.84 1160 1150 -14.25 1.65 1160 1151 -17.54 1.09 1150 -13.95 1150 1140 -15.25 0.99 1150 1140 -18.26 0.23 1140 -13.67 1140 1130 -15.66 0.71 1140 1131 -18.24 0.26 1130 -12.12 1130 1120 -14.10 1.75 1130 1120 -18.29 0.18 1120 -14.95 1120 1111 -16.75 -0.01 1120 1110 -18.57 -0.15 1110 -14.46 1110 1100 -16.64 0.06 1110 1100 -18.43 0.03 1100 -12.52 1100 1091 -17.03 -0.19 1100 1090 -18.50 -0.06 1090 -14.14 1090 1080 -17.04 -0.20 1090 1080 -18.75 -0.36 1080 -14.49 1080 1071 -19.48 -1.82 1080 1070 -18.03 0.50 1070 -14.35 1070 1061 -14.69 1.36 1070 1060 -18.05 0.48 1060 -14.04 1060 1050 -17.69 -0.63 1060 1050 -18.45 0.00 1050 -14.58 1050 1040 -17.76 -0.68 1050 1041 -18.37 0.09 1040 -14.43 1040 1030 -19.36 -1.74 1040 1030 -18.41 0.05 1030 -13.83 1030 1020 -15.02 1.14 1030 1020 -18.89 -0.53 1020 -14.65 1020 1011 -14.38 1.56 1020 1010 -18.71 -0.31 1010 -14.75 1010 1000 -15.47 0.84 1010 1000 -18.09 0.43