East Rongbuk Glacier Col Ice Core 1,000 Year Geochemical Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: East Rongbuk Glacier Col Ice Core 1,000 Year Geochemical Data LAST UPDATE: 9/2008 (Original receipt by WDC Paleo) CONTRIBUTORS: Susan Kaspari, Paul Mayewski, Shichang Kang and Shugui Hou IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2008-087 WDC PALEO CONTRIBUTION SERIES CITATION: Kaspari, S., et al. 2008. East Rongbuk Glacier Col Ice Core 1,000 Year Geochemical Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2008-087. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Kaspari, S., P. Mayewski, S. Kang, S. Sneed, S. Hou, R. Hooke, K. Kreutz, D. Introne, M. Handley, K. Maasch, D. Qin, and J. Ren. 2007. Reduction in northward incursions of the South Asian monsoon since ~1400 AD inferred from a Mt. Everest ice core. Geophys. Res. Lett., 34, L16701, doi:10.1029/2007GL030440. ABSTRACT: A highly resolved Mt. Everest ice core reveals a decrease in marine and increase in continental air masses related to relatively high summer surface pressure over Mongolia, and reduction in northward incursions of the summer South Asian monsoon since ~1400 AD. Previously published proxy records from lower sites south of the Himalayas indicate strengthening of the monsoon since this time. These regional differences are consistent with a south–north seesaw in convective activity in the Asian monsoon region, and reflect a southward shift in the mean summer position of the monsoon trough since~1400 AD. The change in monsoonal circulation at 1400 AD is synchronous with a reduction in solar irradiance and the onset of the LIA. This demonstrates a hemispheric scale circulation reorganization at this time, and the potential for future large shifts in monsoonal circulation. GEOGRAPHIC REGION: South Asia PERIOD OF RECORD: 997 - 1997 AD FUNDING SOURCES: US National Science Foundation (ATM 0139491), US National Oceanic and Atmospheric Administration (NOAA NA05OAR4311109), the Natural Science Foundation of China (90411003, 40401054) and the Chinese Academy of Sciences ("Talents Project" and the 3rd Innovation Programs: KZCX3-SW-339/344). DESCRIPTION: High resolution (5 year) Ca, Cl and dD data from the 2002 Mt. Everest East Rongbuk Glacier col ice core. East Rongbuk Glacier col ice core, Mt. Everest northeast ridge: 28.03°N, 86.96°E; 6518 m elev., 108m long DATA: Column 1: Year AD Column 2: Depth (m) Column 3: Ca (ug/L) Column 4: dD (per mil) Column 5: Cl (ug/L) Column 6: marine Cl Year AD Depth(m) Ca(ug/L) dD(per mil) Cl(ug/L) Marine Cl 1997.50 5.20 166.87 -120.40 13.71 0.11 1992.50 8.64 148.17 -120.67 12.06 0.12 1987.50 11.84 313.22 -143.54 15.80 0.05 1982.50 15.32 477.60 -135.16 23.22 0.08 1977.50 19.10 271.82 -118.04 16.21 0.08 1972.50 22.42 138.91 -124.04 11.60 0.10 1967.50 25.88 217.65 -125.69 17.15 0.13 1962.50 29.40 99.45 -112.68 13.10 0.18 1957.50 32.93 122.15 -128.87 42.76 0.87 1952.50 35.61 125.30 -125.50 27.17 0.54 1947.50 38.09 95.55 -117.40 19.24 0.35 1942.50 40.45 167.62 -120.19 19.17 0.16 1937.50 41.90 142.58 -104.35 15.12 0.14 1932.50 43.19 130.49 -112.83 11.81 0.10 1927.50 44.46 116.75 -116.26 26.48 0.50 1922.50 45.96 110.55 -124.62 12.80 0.10 1917.50 47.42 288.13 -131.87 41.72 0.32 1912.50 48.40 252.07 -130.87 48.77 0.49 1907.50 49.27 710.34 -131.84 13.33 0.01 1902.50 50.24 305.43 -114.78 9.30 0.01 1897.50 51.22 304.19 -136.36 23.37 0.03 1892.50 52.11 130.43 -137.58 17.43 0.22 1887.50 52.92 143.57 -114.70 20.03 0.27 1882.50 53.64 158.04 -117.00 17.55 0.08 1877.50 54.40 194.10 -124.39 24.46 0.15 1872.50 55.07 127.25 -122.59 14.59 0.13 1867.50 55.94 135.49 -124.19 17.04 0.12 1862.50 56.65 132.64 -134.18 9.94 0.09 1857.50 57.58 81.84 -145.86 12.75 0.17 1852.50 58.57 137.70 -131.43 11.78 0.12 1847.50 59.40 179.86 -143.63 15.05 0.09 1842.50 60.25 63.47 -127.13 13.81 0.28 1837.50 61.06 144.47 -126.41 17.18 0.11 1832.50 61.80 143.24 -126.37 45.33 0.83 1827.50 62.64 117.16 -138.22 19.44 0.21 1822.50 63.68 231.00 -139.48 18.84 0.09 1817.50 64.75 88.02 -137.65 17.20 0.27 1812.50 65.75 87.46 -144.91 12.57 0.19 1807.50 66.72 71.21 -154.40 11.82 0.19 1802.50 67.63 144.73 -146.49 22.20 0.21 1797.50 68.32 106.93 -165.72 15.57 0.21 1792.50 69.22 183.04 -140.46 17.82 0.11 1787.50 70.11 104.64 -146.01 15.37 0.16 1782.50 70.93 188.94 -148.43 27.57 0.25 1777.50 71.74 315.37 -154.12 15.08 0.02 1772.50 72.54 209.53 -134.41 26.43 0.17 1767.50 73.33 121.00 -129.69 21.02 0.30 1762.50 74.12 98.82 -129.84 11.83 0.13 1757.50 74.92 135.86 -147.18 13.79 0.07 1752.50 75.58 283.86 -145.36 27.62 0.08 1747.50 76.22 142.62 -134.27 13.54 0.07 1742.50 76.94 68.72 -146.85 10.20 0.15 1737.50 77.44 74.30 -141.05 10.05 0.13 1732.50 77.88 75.52 -137.53 10.94 0.16 1727.50 78.38 102.04 -133.67 11.76 0.10 1722.50 79.10 120.96 -141.29 12.71 0.07 1717.50 79.67 158.26 -133.80 16.53 0.07 1712.50 80.28 451.18 -147.72 30.73 0.03 1707.50 80.95 229.54 -137.34 20.98 0.04 1702.50 81.66 185.96 -131.03 14.59 0.04 1697.50 82.39 118.89 -140.12 12.16 0.03 1692.50 82.95 107.72 -143.30 10.77 0.10 1687.50 83.65 138.70 -146.99 17.10 0.13 1682.50 84.36 87.98 -150.88 11.54 0.12 1677.50 84.85 117.45 -145.32 14.56 0.12 1672.50 85.28 80.39 -146.88 15.55 0.27 1667.50 85.76 94.85 -137.81 17.03 0.22 1662.50 86.27 77.21 -137.76 14.07 0.22 1657.50 86.85 108.08 -143.62 16.55 0.17 1652.50 87.43 85.43 -133.04 22.18 0.42 1647.50 87.91 101.14 -126.33 38.77 0.82 1642.50 88.36 76.63 -137.51 26.27 0.56 1637.50 88.78 91.53 -131.65 25.18 0.46 1632.50 89.17 78.66 -139.10 30.82 0.68 1627.50 89.60 122.21 -129.64 27.46 0.39 1622.50 89.97 78.35 -138.10 15.28 0.26 1617.50 90.36 207.56 -132.48 44.44 0.63 1612.50 90.85 103.66 -130.37 39.44 0.81 1607.50 91.46 44.76 -131.44 23.65 0.63 1602.50 91.87 102.05 -126.05 17.55 0.20 1597.50 92.25 50.08 -147.79 10.85 0.25 1592.50 92.66 91.87 -126.95 12.27 0.11 1587.50 93.16 101.60 -133.76 16.66 0.24 1582.50 93.63 155.87 -133.51 10.98 0.01 1577.50 94.13 113.77 -127.86 15.52 0.12 1572.50 94.57 177.80 -129.02 31.27 0.36 1567.50 95.03 181.93 -125.01 13.38 0.03 1562.50 95.49 175.38 -116.61 17.49 0.04 1557.50 96.01 147.27 -124.29 23.48 0.30 1552.50 96.50 193.70 -128.59 20.60 0.07 1547.50 96.86 236.45 -134.87 32.99 0.17 1542.50 97.27 203.62 -124.56 39.05 0.44 1537.50 97.70 222.07 -123.32 29.42 0.14 1532.50 98.09 215.69 -131.66 22.34 0.04 1527.50 98.31 343.27 -141.31 21.93 0.05 1522.50 98.53 119.93 -129.70 16.30 0.13 1517.50 98.74 114.36 -132.27 12.09 0.03 1512.50 98.95 126.62 -137.50 13.45 0.06 1507.50 99.15 122.38 -133.17 18.04 0.13 1502.50 99.35 154.44 -129.70 16.33 0.07 1497.50 99.54 107.07 -129.03 14.92 0.11 1492.50 99.73 89.01 -128.60 23.15 0.43 1487.50 99.91 89.14 -130.82 8.65 0.03 1482.50 100.09 132.67 -119.96 14.85 0.04 1477.50 100.27 136.20 -126.52 22.41 0.20 1472.50 100.44 82.72 -144.70 8.38 0.04 1467.50 100.60 67.40 -132.28 10.60 0.17 1462.50 100.77 58.69 -134.83 9.82 0.18 1457.50 100.93 81.10 -138.49 10.45 0.10 1452.50 101.08 66.24 -130.69 9.28 0.13 1447.50 101.23 680.41 -113.10 20.40 0.05 1442.50 101.38 557.01 -130.64 15.51 0.01 1437.50 101.52 266.67 -133.19 12.32 0.01 1432.50 101.67 383.86 -137.68 24.37 0.06 1427.50 101.80 169.39 -135.75 13.93 0.01 1422.50 101.94 164.92 -125.60 19.67 0.06 1417.50 102.07 218.00 -142.17 42.35 0.45 1412.50 102.20 197.98 -131.51 64.30 1.14 1407.50 102.33 130.71 -137.58 13.54 0.05 1402.50 102.45 116.27 -138.66 10.13 0.01 1397.50 102.57 109.95 -132.55 15.27 0.14 1392.50 102.69 125.02 -133.55 13.77 0.01 1387.50 102.81 153.69 -138.92 12.25 0.01 1382.50 102.92 170.72 -129.50 19.41 0.04 1377.50 103.03 87.53 -134.07 9.21 0.04 1372.50 103.14 88.69 -132.55 8.90 0.02 1367.50 103.24 86.29 -137.89 7.15 0.04 1362.50 103.34 120.83 -132.52 14.54 0.04 1357.50 103.44 94.28 -136.86 8.28 0.01 1352.50 103.54 125.24 -130.86 9.13 0.01 1347.50 103.64 117.69 -125.11 19.06 0.17 1342.50 103.73 91.99 -129.20 8.47 0.03 1337.50 103.82 104.46 -141.09 9.90 0.02 1332.50 103.91 137.11 -138.39 9.41 0.01 1327.50 104.00 108.95 -127.74 14.98 0.11 1322.50 104.09 91.63 -133.71 10.72 0.06 1317.50 104.17 83.63 -138.06 13.54 0.18 1312.50 104.25 76.42 -136.19 16.79 0.30 1307.50 104.33 77.28 -137.41 157.46 4.26 1302.50 104.41 195.42 -136.26 16.38 0.02 1297.50 104.49 107.66 -139.11 7.93 0.02 1292.50 104.57 144.50 -139.78 66.48 1.46 1287.50 104.64 74.36 -137.57 42.18 1.02 1282.50 104.72 157.85 -134.31 29.50 0.33 1277.50 104.78 98.50 -139.81 7.78 0.02 1272.50 104.86 90.10 -138.16 8.64 0.07 1267.50 104.92 68.77 -135.29 6.72 0.05 1262.50 104.99 68.75 -133.86 9.28 0.12 1257.50 105.05 69.48 -140.20 9.63 0.13 1252.50 105.12 86.94 -136.30 12.99 2.07 1247.50 105.18 73.38 -140.17 168.06 4.80 1242.50 105.24 62.49 -141.43 9.10 0.14 1237.50 105.30 90.79 -140.94 88.78 5.03 1232.50 105.36 71.76 -137.17 127.74 3.44 1227.50 105.42 184.13 -137.34 13.75 0.05 1222.50 105.48 59.41 -143.85 6.56 0.09 1217.50 105.53 57.75 -144.54 7.24 0.11 1212.50 105.59 57.20 -143.06 19.63 0.47 1207.50 105.64 77.71 -146.47 15.50 0.28 1202.50 105.69 75.70 -139.66 22.04 0.45 1197.50 105.74 65.16 -143.39 12.18 0.22 1192.50 105.79 58.35 -141.36 8.19 0.14 1187.50 105.84 82.19 -149.31 10.46 0.09 1182.50 105.89 72.09 -141.91 9.42 0.11 1177.50 105.93 76.61 -139.03 10.47 0.12 1172.50 105.98 83.62 -139.54 9.06 0.05 1167.50 106.02 81.02 -139.35 13.62 0.19 1162.50 106.07 97.98 -139.85 119.19 3.08 1157.50 106.11 131.55 -140.84 157.25 4.01 1152.50 106.15 61.99 -140.12 20.53 0.47 1147.50 106.19 69.40 -139.02 87.39 2.32 1142.50 106.23 63.21 -136.71 11.37 0.20 1137.50 106.27 67.32 -136.47 11.15 0.18 1132.50 106.31 67.42 -141.04 15.90 0.33 1127.50 106.35 73.43 -141.04 8.70 0.11 1122.50 106.38 48.51 -136.23 8.15 0.18 1117.50 106.42 64.06 -135.33 10.39 0.17 1112.50 106.46 79.17 -136.29 25.57 0.53 1107.50 106.49 48.69 -133.19 7.99 0.18 1102.50 106.53 55.40 -135.46 8.91 0.17 1097.50 106.56 59.02 -138.46 10.29 0.19 1092.50 106.59 71.21 -138.28 18.93 0.38 1087.50 106.62 79.23 -138.46 102.66 2.70 1082.50 106.66 68.46 -139.69 121.86 3.29 1077.50 106.69 66.39 -140.77 51.82 1.33 1072.50 106.72 71.04 -141.40 8.83 0.10 1067.50 106.75 53.92 -138.57 9.21 0.19 1062.50 106.78 71.27 -140.41 9.87 0.13 1057.50 106.81 57.26 -143.12 9.78 0.19 1052.50 106.83 54.85 -140.30 10.46 0.22 1047.50 106.86 67.53 -138.61 19.57 0.42 1042.50 106.89 65.03 -139.82 10.38 0.17 1037.50 106.91 71.79 -140.80 10.42 0.14 1032.50 106.94 75.61 -139.74 9.85 0.10 1027.50 106.97 74.72 -138.95 13.22 0.20 1022.50 106.99 64.04 -137.25 21.37 0.48 1017.50 107.01 70.06 -136.09 11.51 0.18 1012.50 107.04 54.88 -137.10 8.76 0.17 1007.50 107.06 49.92 -139.85 8.22 0.18 1002.50 107.08 62.43 -139.72 8.56 0.13 997.50 107.11 53.23 -136.26 8.76 0.18