# NOAA Paleoclimatology Program - Speleothem Site Data # cave-coldair-t7.txt # Speleothem data only # File Created: 7-march-2011 # #********************************************************************************* # Please cite the contributor and the original publications when using these data #********************************************************************************* # # Missing Values indicated by '-999' # # PI: Y.J. Wang # Core/Site: T7/Cold Air Cave # Latitude: 24 0' S # Longitude: 29 11'E # Elevation: 1390 m # # Publications: # Holmgren, K, Karlén, W., Lauritzen, S.E., Lee-Thorp, J.A., Partridge T. C., # Piketh, S. Repinski, P., Stevenson, C., Svanered, O. and Tyson, P.D., 1999. # A 3000-year High-Resolution Record of Palaeoclimate for North-Eastern South Africa. # The Holocene, 9, 3, 295-309, DOI: 10.1191/095968399672625464 # #------------------ # # Description & Notes: # Stable isotope and grey colour intensity data from an # aragonite stalagmite from Cold Air Cave in the Makapansgat Valley # in northeastern South Africa. # # The record indicates wetter conditions in the summer rainfall areas # of southern Africa during the mid Holocene warm phase, in phase with # previously identified reduction in Antarctic circumpolar circulation. # The record also captures a marked climate shift 3200 years ago. # The trend thereafter towards the most pronounced cool, dry episode # in the past 6500 years, culminating at AD 1750, reflects a cooling # trend observed also in Antarctic and Greenland ice cores. # #------------------ # 230Th dating # # Twenty-one 5–15 g samples, taken at regular intervals along the growth axis # of the first slice, have been dated by alpha-particle spectrometry, using standard # chemical preparation procedures and computer algorithms (Lauritzen, 1993; 1996b). # Dating by the 230Th/234U method yields ages in calendar years before present # (i.e., before 1996). Age errors are based on counting statistics. # # Depth (mm) Sample Id. Lab. No. U (ppm) 234U/238U 230Th/234U 230Th/232Th Age (years) Corrected age # (years) # 8 ± 5 T7y-1 1596 0.88 7.551 ± 0.115 0.0017 ± 0.0005 >1000 180 ± 60 # 18 ± 4 T7y-15 1831 0.86 7.308 ± 0.092 0.0032 ± 0.0003 58 350 ± 40 # 90 ± 5 T7y-12 1751 0.62 8.012 ± 0.152 0.0047 ± 0.0007 >1000 520 ± 70 # 138 ± 3 T7y-16 1832 1.1 7.451 ± 0.079 0.0061 ± 0.0004 >1000 660 ± 40 # 218 ± 5 T7y-17 1833 0.98 7.461 ± 0.127 0.0118 ± 0.0011 >1000 1280 ± 120 # 303 ± 5 T7y-11 1750 1.2 6.932 ± 0.107 0.0128 ± 0.0008 >1000 1400 ± 80 # 325 ± 6 T7y-8 1699 1.1 7.272 ± 0.179 0.0171 ± 0.012 24 1870 ± 140 # 334 ± 2 T7y-10 1749 0.98 6.395 ± 0.102 0.0149 ± 0.0010 >1000 1630 ± 120 # 426 ± 3 T7y-18 1834 1.3 7.110 ± 0.088 0.0257 ± 0.0016 60 2810 ± 170 # 522 ± 10 T7-2 1597 0.69 6.995 ± 0.110 0.0276 ± 0.0019 >1000 3020 ± 210 # 536 ± 4 T7o-5 1646 0.77 7.456 ± 0.154 0.0260 ± 0.0015 169 2850 ± 160 # 614 ± 7 T7o-8 1784 1.2 6.949 ± 0.100 0.0338 ± 0.0012 168 3710 ± 130 # 669 ± 6 T7o-4 1645 1.0 6.422 ± 0.107 0.0353 ± 0.0020 >1000 3880 ± 220 # 718 ± 4 T7o-7 1698 1.1 6.513 ± 0.087 0.0389 ± 0.0014 8.5 4280 ± 150 3540 ± 180 # 736 ± 6 T7o-9 1785 1.1 6.033 ± 0.087 0.0357 ± 0.0015 184 3930 ± 170 # 801 ± 3 T7o-6 1697 1.3 5.335 ± 0.069 0.0464 ± 0.0016 93 5130 ± 180 # 838 ± 5 T7o-3 1644 1.6 5.531 ± 0.066 0.0509 ± 0.0016 >1000 5630 ± 180 # 848 ± 5 T7o-2 1643 2.7 2.540 ± 0.125 0.0524 ± 0.0031 145 5810 ± 350 # 921 ± 5 T7o-10 1786 1.5 5.334 ± 0.010 0.0560 ± 0.0012 529 6210 ± 140 # 987 ± 8 T7o-10 1642 1.7 5.091 ± 0.040 0.0537 ± 0.0021 >1000 5950 ± 240 # 990 ± 3 T7o-11 1830 0.98 4.952 ± 0.062 0.0574 ± 0.0014 >1000 6370 ± 160 # #------------------ # # Variables: # depth_mm Depth (mm) # age_AD Age (years AD) # d13CcarbPDB delta13C calcium carbonate (per mil PDB) # d18OcarbPDB delta18O calcium carbonate (per mil PDB) # # CORE: T7 depth_mm age_AD d13CcarbPDB d18OcarbPDB 1 1996 -5.187736 -2.905723 5 1975 -5.186736 -2.897723 10 1948 -5.1802037 -4.2625404 11.5 1937 -4.5400751 -3.8896861 13 1932 -4.7304661 -3.8686383 15 1921 -4.87765 -3.7460573 17 1911 -4.5567691 -3.4313565 19 1900 -4.341284 -2.7803455 20.5 1889 -4.7891662 -3.2080465 22.5 1880 -4.484226 -3.8282576 25 1872 -4.943736 -3.963723 27 1864 -4.6479471 -3.0408492 29.5 1852 -5.106003 -2.8749504 32 1844 -4.7728112 -2.9787019 34 1837 -4.6911681 -3.3575719 38 1821 -3.2481804 -2.9444919 40 1813 -4.7877457 -3.1083179 42.5 1801 -4.7494791 -3.2522993 44.5 1794 -4.3211553 -3.9452167 47 1787 -4.0023367 -4.2855554 49 1780 -4.9586003 -3.8603287 51.5 1770 -5.65468 -4.5026045 53.5 1764 -5.4733202 -4.9774094 55.5 1757 -5.502228 -5.1662674 57.5 1750 -5.435828 -5.9283872 59.5 1744 -5.0113719 -4.8650847 61.5 1737 -4.381438 -4.3222218 63.5 1730 -5.6135576 -4.6793947 65 1727 -5.5364378 -4.574626 69.5 1710 -4.6963007 -3.4147051 71 1707 -4.9508798 -3.7268391 74 1697 -5.3385899 -5.2075277 77 1690 -4.0623319 -4.2766772 85 1666 -4.9423215 -4.0955682 87.5 1657 -4.3331487 -3.1226881 90 1651 -4.1797049 -3.6967268 92.5 1642 -4.8720329 -4.0814691 95 1636 -5.0072653 -3.9328006 98 1627 -4.598501 -3.8554006 100 1621 -5.0071814 -4.5317641 101.5 1615 -4.739888 -3.8306873 103.5 1610 -4.999954 -3.8399554 105.5 1604 -5.2566998 -3.7925577 107.5 1598 -5.1453092 -4.0010028 110 1592 -5.4274375 -3.7188444 112 1586 -4.972574 -3.2169886 114 1580 -5.0723531 -3.6510883 115.5 1574 -5.1691539 -3.6115327 117.5 1568 -4.9891965 -4.3621125 119.5 1562 -5.0524957 -3.8386755 122 1556 -5.2693603 -3.8417342 124 1550 -4.731931 -3.71191 126 1544 -4.0783618 -4.2599645 128.5 1535 -4.3941596 -3.920512 131.5 1524 -3.9262526 -3.8785124 135 1513 -3.497092 -3.073164 139 1499 -3.8780727 -3.0973203 141.5 1488 -4.585427 -2.9305401 143 1484 -4.3146904 -3.3259001 144.5 1477 -3.7205622 -2.5250924 147 1470 -4.0742056 -3.095201 148.5 1463 -2.9269967 -3.6034124 150 1459 -3.6555109 -4.5312553 152 1452 -4.5483639 -4.5237427 153.5 1445 -4.6964619 -3.914515 156 1437 -4.4203198 -3.3196724 158 1430 -3.7891097 -2.5888746 165.6 1403 -4.5178797 -3.0496073 167.5 1397 -4.829159 -2.9165859 169.5 1391 -4.7730639 -3.3316071 171 1388 -4.5996516 -2.9533658 172.5 1381 -4.6789176 -3.2201734 174 1378 -4.6062572 -2.9953327 175 1375 -4.8858712 -3.3665447 176.5 1369 -4.9345572 -4.0567117 178 1366 -4.8681295 -4.1590891 179 1363 -4.9378107 -3.9545303 181 1357 -4.6789944 -4.104161 182.5 1351 -4.7088525 -3.4329975 184.5 1345 -4.3842104 -2.6561027 186 1342 -4.6846049 -3.029938 187.5 1336 -4.9396961 -2.8978265 191 1326 -4.7969153 -2.9852112 192.5 1320 -5.5252545 -3.6127255 195 1314 -5.1159599 -3.1856132 199 1295 -5.6495588 -4.0390439 201 1282 -5.3538616 -3.6662846 203 1270 -4.5487621 -3.1220441 205 1257 -5.4737875 -3.4601317 210 1225 -3.4678042 -2.7531982 211.5 1212 -3.9527164 -2.8260365 213 1206 -3.4454711 -3.2702897 214.5 1193 -4.0632858 -4.1654191 216.5 1180 -4.4729888 -4.7318692 217.5 1174 -4.1730611 -4.3465567 220 1161 -4.3101208 -3.8150578 222.5 1142 -4.806494 -4.3316021 225 1129 -4.9419282 -4.4176793 227 1116 -4.6349099 -4.5464592 229.5 1097 -4.4153192 -3.7884727 233 1078 -3.5423434 -2.7679188 235 1065 -3.0534425 -2.6491842 237.5 1046 -4.562736 -3.727723 241 1026 -4.8181832 -3.6140996 244.5 1001 -5.998736 -3.952723 248 982 -4.731736 -3.483723 252 956 -4.429736 -3.458723 254.5 937 -4.086736 -3.682723 258 918 -4.051736 -3.091723 260.5 899 -3.542736 -2.767723 262 892 -3.740736 -2.979723 264.5 873 -3.053736 -2.648723 268 854 -4.451736 -4.469723 271 835 -3.099637 -3.8372972 273 822 -3.7043362 -3.1805587 275.5 803 -3.1866941 -3.1711264 280 777 -3.9340537 -3.3838222 282 764 -4.3369586 -2.6123693 285 745 -4.4225023 -3.3970673 287.5 726 -3.6525183 -3.7072556 290.5 707 -3.9886751 -4.5120158 293.5 688 -3.6132853 -3.4017742 296 675 -4.3738077 -4.8534346 298 662 -4.8663247 -3.5996988 303 630 -4.3639529 -3.0187218 308 599 -4.6580827 -3.5188327 313.5 561 -3.5598607 -3.367436 318 536 -3.7836261 -2.8647132 319.5 523 -2.3895519 -2.640707 322.5 504 -3.7204931 -3.0865724 325 492 -3.8326395 -3.9326883 328 473.1 -2.9285864 -3.4712744 331 460.5 -3.7510808 -2.8280752 333.5 435 -4.2129233 -3.3562443 336.5 416 -3.7496095 -2.81809 340 397 -4.1335585 -2.8366435 343 378.1 -4.2280664 -3.9794212 346.5 356.05 -4.0252456 -3.1341292 349.5 334 -4.0295134 -3.1649091 352 321 -3.8155499 -2.5624275 355 303 -3.0621443 -2.3865893 357.5 284 -3.7174151 -2.9322338 359 277 -4.0657482 -2.9806478 363 252 -4.0946476 -4.1252122 365 239 -4.1814616 -3.2088602 366 233 -4.3245413 -3.686889 368.5 214 -2.7510018 -3.0596943 374.5 176 -4.5181696 -3.7829671 376.5 164 -3.0613649 -3.8369959 380 145 -3.434634 -3.7800043 381 139 -3.062736 -2.988723 383 126 -3.0930064 -2.7696004 389 88 -4.2806962 -4.1209395 392 69 -4.0432529 -3.8107441 395 50 -3.3733814 -3.6305437 397.5 31 -4.0047541 -3.1273701 400 19 -3.803643 -3.109623 402.5 0 -3.8010664 -3.65855 405 -13 -4.049154 -3.5648601 407.5 -32 -3.4285817 -3.5525542 410 -44 -3.5150666 -3.4173632 412.5 -64 -2.5813732 -2.5675929 415.5 -85 -3.0538657 -3.0785208 419 -105 -2.7197361 -2.1384012 422.5 -133 -3.6747146 -3.3029216 424.5 -140 -3.892338 -4.0392978 427 -160 -2.9164178 -2.967892 431.5 -195 -3.6072609 -3.1593425 433 -202 -3.9927974 -3.8662081 437.5 -236 -4.386235 -2.9699354 440 -250 -4.544071 -3.6065543 443 -270 -4.1394894 -3.2482438 447 -298 -4.024672 -3.7363999 448.5 -312 -3.6846428 -2.8925431 451 -326 -3.0919695 -3.1304727 453.5 -346 -4.6032784 -2.6920114 456 -360 -3.9876704 -3.2226143 457.5 -374 -4.1826155 -3.4135812 461 -394 -4.0212777 -3.2738543 464 -415 -3.4087169 -3.2271574 467.5 -443 -4.0789077 -3.0857313 470 -456 -3.3082175 -2.7050967 472.5 -477 -3.6884141 -3.8074074 475 -491 -3.7519164 -3.4222472 478 -512 -3.5447679 -3.1072769 480.5 -532 -3.3309054 -3.1727152 483 -546 -3.1259816 -3.4836302 486 -567 -4.532356 -4.3442536 488.5 -587 -4.0741589 -3.742223 490.5 -601 -4.5296242 -3.2238298 494.5 -629 -3.7118609 -3.2071972 497.5 -642 -4.800195 -4.2123528 500.5 -669 -4.6923888 -3.2851525 503 -681 -4.550288 -3.4439359 506 -699 -3.8124082 -3.7066956 508.5 -717 -4.4340351 -3.4710195 511.5 -735 -4.2581666 -2.6276109 514.5 -753 -4.9236715 -2.8353684 518.5 -777 -4.6751812 -3.4353402 522 -795 -4.8798316 -3.4232409 524.5 -812 -3.6162686 -2.970357 528 -830 -4.1867869 -3.3404253 531 -848 -4.0663071 -3.421571 532.6 -860 -3.4067744 -2.6802918 534.2 -866 -3.2133806 -3.8390276 535.8 -878 -4.0270188 -4.2365373 537.4 -890 -2.8240835 -3.0611036 539 -896 -3.6798333 -3.4023016 540.6 -908 -2.8083471 -2.129879 542.2 -926 -4.0395352 -3.2729485 545.4 -938 -4.0240678 -3.7081071 547 -944 -3.3134149 -2.3040306 548.6 -956 -3.3408039 -2.5328192 553.4 -980 -3.5310987 -3.0053868 555 -992 -4.0670191 -3.322869 556.6 -1004 -3.9973458 -3.28897 558.2 -1010 -4.3470954 -4.1987489 559.8 -1022 -4.2097122 -4.1443437 561.4 -1030.4 -4.2046248 -3.9425004 563 -1040 -4.0863976 -3.3391368 564.6 -1049.6 -3.1782904 -2.8241888 566.2 -1064 -3.6251611 -3.4983735 567.8 -1070 -3.6833926 -3.4024353 571 -1088 -3.7680118 -3.3678232 572.6 -1099 -4.290716 -3.7989558 574.2 -1105 -3.9519093 -3.3795939 575.8 -1117 -3.726929 -3.1386039 577.4 -1123 -3.6175552 -3.4555108 579 -1135 -3.4230144 -3.481533 580.6 -1147 -4.4151609 -4.5639047 582.2 -1153 -4.1019117 -3.6079077 585.4 -1171 -4.0341526 -3.2308008 587 -1183 -3.8379077 -3.527911 588.6 -1195 -3.733411 -3.2439005 590.2 -1201 -4.4794052 -3.3374186 593.4 -1219 -3.9851007 -3.2857988 595 -1231 -4.1602659 -3.5810181 596.6 -1243 -3.9238081 -3.2665119 598.2 -1251 -4.1616745 -2.9085655 599.8 -1267 -3.5692473 -2.9586488 601.4 -1275 -4.2068306 -3.2604645 603 -1291 -4.6886636 -3.0384919 604.6 -1307 -4.1321837 -2.484653 606.2 -1315 -3.734842 -2.3902248 607.8 -1332 -4.4524748 -2.9327736 609.4 -1340 -4.4743561 -3.0588734 611 -1356 -4.3322869 -3.1079844 612.6 -1372 -4.707522 -2.8113438 614.2 -1380 -4.4966271 -2.9106622 615.8 -1396 -4.1241194 -2.7986578 617.4 -1404 -4.5406561 -2.8912846 619 -1420 -4.6477287 -2.1799543 620.6 -1436 -4.4296149 -2.8245213 622.2 -1444 -4.563969 -3.3283505 623.8 -1460 -4.8041036 -3.3147199 625.4 -1468 -4.2635535 -2.745217 627 -1484 -4.842407 -2.390952 628.6 -1501 -5.0548857 -3.4225062 630.2 -1509 -3.5242896 -2.8571582 631.8 -1525 -4.3624538 -2.8561403 633.4 -1533 -4.6368913 -2.7486418 635 -1549 -5.4012804 -4.2168968 636.6 -1565 -5.1646125 -2.9265988 638.2 -1573 -4.9451775 -3.7816884 639.5 -1589 -4.2749984 -2.8558413 641 -1597 -4.1671599 -3.8115826 642.5 -1613 -4.6553325 -3.3286744 644 -1621 -4.0738757 -3.2179482 645.5 -1637 -4.3569723 -3.0623868 648.5 -1653 -4.9689352 -3.2428807 650 -1670 -4.6851964 -3.2037237 651.5 -1686 -4.3960308 -2.8579284 653 -1694 -4.1820559 -3.175556 654.5 -1702 -3.028472 -2.8898272 656 -1718 -4.3581892 -3.167079 657.5 -1734 -5.0142659 -3.1862544 659 -1742 -5.3817644 -3.553052 660.5 -1750 -4.1880764 -3.1079577 662 -1766 -3.9818499 -2.7563193 663.5 -1782 -3.4933247 -2.2064793 665 -1790 -3.900902 -3.5734656 666.9 -1806 -4.087883 -3.4018112 668.8 -1822 -4.3205736 -3.2927048 670.7 -1839 -4.33001 -2.7364177 672.6 -1855 -4.9230226 -2.6305893 674.5 -1863 -4.6725373 -4.1930311 676.4 -1879 -4.3430221 -3.0165336 678.3 -1895 -4.2148883 -3.3869802 680.2 -1911 -4.6203673 -3.2251737 682.1 -1927 -4.299945 -3.2760777 684 -1943 -4.2767753 -3.5202585 685.9 -1959 -3.972268 -1.4392146 687.8 -1975 -4.9754086 -3.4975295 689.7 -1991 -4.3974404 -2.783698 691.6 -2008 -4.498159 -2.1324427 693.5 -2024 -4.5199908 -4.726402 695.4 -2032 -3.4638615 -3.6095776 699.2 -2064 -3.1427124 -3.3361164 701.1 -2080 -4.7021642 -3.2956729 703 -2098 -3.9801436 -2.8252342 704.9 -2115 -4.2623646 -3.6715741 706.8 -2133 -4.2356478 -3.5513817 708.2 -2142 -4.3066496 -2.5325411 709.7 -2159 -3.2319508 -2.6431184 711.2 -2168 -5.1122832 -3.1034399 712.6 -2186 -4.7723943 -3.8253803 714 -2194 -4.2763039 -3.1919395 715.5 -2212 -4.2157965 -3.0614439 717 -2221 -4.0878868 -2.9292151 718.4 -2230 -3.3249555 -3.0532923 719.8 -2247 -4.3892795 -2.4882985 721.3 -2256 -5.2738188 -2.7139741 722.8 -2274 -4.615825 -2.7192962 724.2 -2282 -4.2958845 -2.3312718 725.6 -2300 -4.1988229 -2.7277893 727.1 -2309 -4.8775564 -3.4732863 728.6 -2318 -4.936616 -2.75062 730 -2335 -5.2762618 -2.8346214 731.4 -2344 -5.0570746 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