The data presented here are preliminary data on a preliminary timescale from the North Greenland Ice Core Project (NorthGRIP). The NorthGRIP ice core project was directed and organized by the Ice and Climate Research Group at the Niels Bohr Institute, University of Copenhagen. It has been supported by funding agencies in Denmark (SNF), Belgium (FNRS-CFB), France (IFRTP and INSU/CNRS), Germany (AWI), Iceland (RannIs), Japan (MEXT), Sweden (SPRS), Switzerland (SNF) and the United States of America (NSF).
32100.5	29.7361
32101.5	26.5196
32102.5	25.1457
32103.5	42.9717
32104.5	94.25
32105.5	48.7663
32106.5	64.4668
32107.5	50.032901
32108.5	38.5284
32109.5	33.2861
32110.5	40.0028
32111.5	61.642601
32112.5	44.922
32113.5	43.3513
32114.5	40.4328
32115.5	41.335
32116.5	53.4855
32117.5	55.0794
32118.5	32.5566
32119.5	41.5254
32120.5	37.2196
32121.5	42.062801
32122.5	23.5123
32123.5	38.624
32124.5	31.8203
32125.5	64.227
32126.5	41.8834
32127.5	36.7793
32128.5	41.6075
32129.5	46.6602
32130.5	29.4371
32131.5	58.197101
32132.5	42.4698
32133.5	32.827701
32134.5	43.4158
32135.5	49.1199
32136.5	46.857101
32137.5	48.4587
32138.5	33.0419
32139.5	24.3517
32140.5	29.4774
32141.5	56.302101
32142.5	60.814701
32143.5	30.7676
32144.5	34.750301
32145.5	48.812801
32146.5	39.7301
32147.5	58.8093
32148.5	39.2245
32149.5	28.9525
32150.5	60.2443
32151.5	53.6996
32152.5	52.2247
32153.5	29.5103
32154.5	32.3476
32155.5	59.866001
32156.5	79.823501
32157.5	37.458
32158.5	26.1104
32159.5	56.205001
32160.5	66.371902
32161.5	83.094001
32162.5	33.7947
32163.5	30.7903
32164.5	38.1288
32165.5	35.7785
32166.5	35.950801
32167.5	37.3863
32168.5	57.2562
32169.5	63.9085
32170.5	42.9376
32171.5	52.0445
32172.5	65.6841
32173.5	43.5871
32174.5	34.548
32175.5	89.6553
32176.5	45.452201
32177.5	44.8802
32178.5	42.237701
32179.5	38.1856
32180.5	85.7999
32181.5	50.1526
32182.5	54.3348
32183.5	51.238
32184.5	74.3575
32185.5	28.0244
32186.5	27.9047
32187.5	35.185501
32188.5	46.9007
32189.5	48.7115
32190.5	48.7063
32191.5	33.7264
32192.5	35.6084
32193.5	26.1515
32194.5	32.298301
32195.5	36.1009
32196.5	20.2074
32197.5	34.384101
32198.5	27.6692
32199.5	32.354
32200.5	39.7906
32201.5	25.406
32202.5	41.1074
32203.5	32.8036
32204.5	55.2361
32205.5	43.1599
32206.5	98.404502
32207.5	37.995601
32208.5	41.0061
32209.5	29.6888
32210.5	33.4122
32211.5	29.8038
32212.5	24.0709
32213.5	32.6539
32214.5	44.928901
32215.5	38.298801
32216.5	31.2356
32217.5	35.6809
32218.5	37.9451
32219.5	38.4593
32220.5	29.5388
32221.5	24.1041
32222.5	36.342601
32223.5	32.132
32224.5	32.3637
32225.5	39.8056
32226.5	46.244701
32227.5	50.683601
32228.5	48.1914
32229.5	52.226001
32230.5	30.0973
32231.5	33.2709
32232.5	27.3326
32233.5	41.799
32234.5	29.0463
32235.5	46.241401
32236.5	40.8868
32237.5	48.544
32238.5	76.624
32239.5	51.4581
32240.5	26.2162
32241.5	34.2943
32242.5	47.9281
32243.5	44.1011
32244.5	43.2771
32246.5	37.852001
32247.5	42.891201
32248.5	40.864
32249.5	49.0859
32250.5	55.4669
32251.5	50.3406
32252.5	47.085
32253.5	47.238
32254.5	28.4279
32255.5	46.458
32256.5	60.7061
32257.5	66.0997
32258.5	46.291801
32259.5	56.618
32260.5	40.0925
32261.5	58.452301
32262.5	55.9915
32263.5	59.7411
32264.5	49.3418
32265.5	60.0986
32266.5	51.6147
32267.5	32.0564
32268.5	59.253601
32269.5	89.987503
32270.5	51.633701
32271.5	46.9777
32272.5	125.734
32273.5	74.112
32274.5	43.6726
32275.5	77.6025
32276.5	56.1937
32277.5	36.979801
32278.5	51.8185
32279.5	108.12
32280.5	89.9566
32281.5	67.055702
32282.5	81.182403
32283.5	123.975
32284.5	128.163
32285.5	116.33
32286.5	74.592903
32287.5	104.922
32288.5	85.2528
32289.5	87.1338
32290.5	71.376403
32291.5	59.0193
32292.5	71.3734
32293.5	87.409103
32294.5	94.6446
32295.5	66.051101
32296.5	75.1599
32297.5	95.3931
32298.5	46.707901
32299.5	58.7524
32300.5	58.7086
32301.5	86.804702
32302.5	90.1949
32303.5	131.923
32304.5	53.4979
32305.5	36.5431
32306.5	24.5881
32307.5	58.158901
32308.5	89.339
32309.5	107.931
32310.5	57.758
32311.5	79.2089
32312.5	125.897
32313.5	147.226
32314.5	85.942901
32315.5	50.9769
32316.5	40.545101
32317.5	80.143501
32318.5	95.024902
32319.5	96.604103
32320.5	112.347
32321.5	153.243
32322.5	151.154
32323.5	116.232
32324.5	96.481101
32325.5	75.984703
32326.5	189.171
32327.5	222.013
32328.5	103.333
32329.5	53.2505
32330.5	56.3639
32331.5	37.9963
32332.5	59.3796
32333.5	56.9265
32334.5	91.768
32335.5	97.1138
32336.5	91.8652
32337.5	66.233802
32338.5	111.452
32339.5	97.949203
32340.5	96.9815
32341.5	110.946
32342.5	74.148101
32343.5	101.833
32344.5	161.926
32345.5	147.361
32346.5	106.69
32347.5	61.7842
32348.5	52.1171
32349.5	59.184501
32350.5	52.3186
32351.5	80.2904
32352.5	65.912803
32353.5	46.2374
32354.5	45.9895
32355.5	117.15
32356.5	120.779
32357.5	114.602
32358.5	151.058
32359.5	162.037
32360.5	73.325202
32361.5	91.7557
32362.5	115.993
32363.5	145.279
32364.5	158.988
32365.5	179.504
32366.5	96.2223
32367.5	74.016403
32368.5	60.8836
32369.5	82.459701
32370.5	153.858
32371.5	93.4198
32372.5	52.6475
32373.5	42.6559
32374.5	66.074
32375.5	71.6465
32376.5	36.8402
32377.5	84.3444
32378.5	107.691
32379.5	89.2127
32380.5	64.2793
32381.5	78.881202
32382.5	58.3308
32383.5	90.4878
32384.5	94.9032
32385.5	63.6415
32386.5	54.3815
32387.5	42.373001
32388.5	45.3057
32389.5	43.502601
32390.5	78.701202
32391.5	76.0512
32392.5	102.241
32393.5	114.204
32394.5	70.100303
32395.5	51.4428
32396.5	108.207
32397.5	138.969
32398.5	81.9211
32399.5	65.3202
32400.5	77.2056
32401.5	95.991401
32402.5	92.069702
32403.5	62.1732
32404.5	61.6814
32405.5	100.013
32406.5	207.176
32407.5	203.693
32408.5	130.722
32409.5	125.035
32410.5	142.355
32411.5	113.629
32412.5	104.184
32413.5	89.966201
32414.5	97.9668
32415.5	71.046203
32416.5	79.021202
32417.5	202.52
32418.5	213.145
32419.5	103.032
32420.5	94.6764
32421.5	69.329101
32422.5	149.733
32423.5	141.543
32424.5	113.21
32425.5	72.944702
32426.5	71.125
32427.5	45.1245
32428.5	61.880001
32429.5	48.2916
32430.5	56.6624
32431.5	70.572402
32432.5	108.378
32433.5	161.385
32434.5	80.9611
32435.5	57.843601
32436.5	76.6402
32437.5	81.830802
32438.5	71.2585
32439.5	107.141
32440.5	118.434
32441.5	85.3892
32442.5	151.685
32443.5	94.028
32444.5	83.682601
32445.5	89.4536
32446.5	69.2978
32447.5	93.5273
32448.5	80.5796
32449.5	59.8418
32450.5	71.022201
32451.5	68.893203
32452.5	67.6608
32453.5	43.0379
32454.5	34.4873
32455.5	43.3479
32456.5	45.5602
32457.5	46.0989
32458.5	67.8558
32459.5	65.0713
32460.5	117.817
32461.5	79.5179
32462.5	99.726
32463.5	125.146
32464.5	146.462
32465.5	110.38
32466.5	105.125
32467.5	161.148
32468.5	183.925
32469.5	157.134
32470.5	167.66
32471.5	121.287
32472.5	44.3528
32473.5	34.964401
32474.5	46.008
32475.5	85.2019
32476.5	132.763
32477.5	183.365
32478.5	121.33
32479.5	112.508
32480.5	175.874
32481.5	172.735
32482.5	48.3275
32483.5	29.1902
32484.5	86.922
32485.5	148.211
32486.5	98.5915
32487.5	54.1637
32488.5	55.4365
32489.5	42.127
32490.5	34.8164
32491.5	61.2244
32492.5	86.1119
32493.5	89.0477
32494.5	62.8343
32495.5	77.6978
32496.5	98.7109
32497.5	137.929
32498.5	124.234
32499.5	66.0247
32500.5	90.756103
32501.5	166.752
32502.5	227.059
32503.5	147.477
32504.5	61.7205
32505.5	80.772201
32506.5	91.432502
32507.5	135.578
32508.5	96.9058
32509.5	83.894203
32510.5	126.243
32511.5	135.337
32512.5	72.4125
32513.5	100.377
32514.5	66.567703
32515.5	73.9173
32516.5	106.897
32518.5	59.856
32519.5	86.0075
32520.5	133.493
32521.5	92.7261
32522.5	129.799
32523.5	132.456
32524.5	144.217
32525.5	96.359901
32526.5	97.2717
32527.5	71.740303
32528.5	62.5051
32529.5	61.5421
32530.5	56.9029
32531.5	110.842
32532.5	97.572601
32533.5	69.744201
32534.5	67.8736
32535.5	59.2257
32536.5	47.3098
32537.5	68.563003
32538.5	53.2763
32539.5	70.5002
32540.5	163.15
32541.5	100.631
32542.5	64.7157
32543.5	94.6758
32544.5	95.587501
32545.5	117.691
32546.5	298.112
32547.5	229.414
32548.5	130.492
32549.5	118.84
32550.5	104.023
32551.5	123.724
32552.5	141.438
32553.5	110.918
32554.5	85.3903
32555.5	121.2
32556.5	86.6978
32557.5	141.355
32558.5	821.37
32559.5	565.108
32560.5	164.191
32561.5	91.458
32562.5	65.7455
32563.5	67.4973
32564.5	73.607002
32565.5	95.5728
32566.5	70.024902
32567.5	81.2033
32568.5	105.151
32569.5	63.6247
32570.5	62.3066
32571.5	58.393901
32572.5	53.2607
32573.5	57.1926
32574.5	98.622802
32575.5	153.753
32576.5	178.111
32577.5	135.999
32578.5	179.304
32579.5	189.929
32580.5	92.2453
32581.5	116.307
32582.5	98.6176
32583.5	120.111
32584.5	84.2709
32585.5	43.8587
32586.5	60.1947
32587.5	75.121101
32588.5	122.921
32589.5	142.88
32590.5	117.218
32591.5	102.415
32592.5	119.708
32593.5	110.784
32594.5	131.973
32595.5	113.903
32596.5	79.2305
32597.5	146.242
32598.5	185.693
32599.5	106.904
32600.5	101.887
32601.5	66.0498
32602.5	79.2145
32603.5	63.7135
32604.5	90.739
32605.5	88.3446
32606.5	73.1262
32607.5	88.8203
32608.5	99.723503
32609.5	114.683
32610.5	100.71
32611.5	111.72
32612.5	86.2475
32613.5	84.0458
32614.5	64.160301
32615.5	51.266201
32616.5	29.777
32617.5	35.1926
32618.5	88.730903
32619.5	147.947
32620.5	140.313
32621.5	112.221
32622.5	74.0055
32623.5	156.451
32624.5	125.576
32625.5	112.146
32626.5	157.781
32627.5	132.844
32628.5	118.316
32629.5	60.7665
32630.5	43.1816
32631.5	78.1828
32632.5	104.132
32633.5	74.0849
32634.5	93.3843
32635.5	91.3023
32636.5	45.094001
32637.5	74.665802
32638.5	54.5102
32639.5	28.7305
32640.5	34.827701
32641.5	55.0741
32642.5	74.939201
32643.5	69.5767
32644.5	87.514701
32645.5	130.263
32646.5	155.808
32647.5	92.796
32648.5	103.598
32649.5	71.140701
32650.5	86.7238
32651.5	87.4434
32652.5	84.378402
32656.5	133.057
32657.5	114.963
32658.5	79.7128
32659.5	129.038
32660.5	204.392
32661.5	134.156
32662.5	81.795402
32663.5	114.437
32664.5	129.427
32665.5	91.820701
32666.5	70.6971
32667.5	38.9488
32668.5	49.108501
32669.5	95.5419
32670.5	71.001502
32671.5	57.0653
32672.5	99.591003
32673.5	84.358703
32674.5	87.4003
32675.5	122.959
32676.5	191.827
32677.5	135.395
32678.5	101.176
32679.5	99.9406
32680.5	62.246101
32681.5	72.740402
32682.5	96.6607
32683.5	70.3343
32684.5	65.9524
32685.5	105.151
32686.5	92.0225
32687.5	56.5076
32688.5	94.942001
32689.5	172.529
32690.5	148.655
32691.5	155.872
32692.5	62.0565
32693.5	65.755
32694.5	78.6336
32695.5	220.298
32696.5	197.658
32697.5	82.345703
32698.5	80.208702
32699.5	130.689
32700.5	144.78
32701.5	129.977
32702.5	152.165
32703.5	91.404502
32704.5	137.154
32705.5	76.718803
32706.5	86.782402
32707.5	122.597
32708.5	107.364
32709.5	59.6172
32710.5	32.9626
32711.5	69.6159
32712.5	104.909
32713.5	56.195
32714.5	123.214
32715.5	190.765
32716.5	132.056
32717.5	119.218
32718.5	74.589202
32719.5	92.909301
32720.5	62.048
32721.5	78.502
32722.5	136.061
32723.5	165.882
32724.5	177.354
32725.5	115.694
32726.5	81.5354
32727.5	90.639801
32728.5	120.507
32729.5	111.439
32730.5	67.133903
32731.5	64.249801
32732.5	51.2613
32733.5	84.8825
32734.5	65.0674
32735.5	41.865501
32736.5	53.5737
32737.5	71.8732
32738.5	99.749603
32739.5	101.5
32740.5	176.554
32741.5	113.056
32742.5	50.265701
32743.5	62.7826
32744.5	49.4716
32745.5	78.3165
32746.5	95.550903
32747.5	105.668
32748.5	94.0088
32749.5	72.4013
32750.5	57.1125
32751.5	37.8469
32752.5	48.8486
32753.5	45.9912
32754.5	86.0609
32755.5	117.327
32756.5	139.599
32757.5	139.154
32758.5	149.45
32759.5	113.232
32760.5	96.4088
32761.5	81.5552
32762.5	107.476
32763.5	82.8146
32764.5	128.003
32765.5	114.454
32766.5	54.0352
32767.5	50.630901
32768.5	69.823501
32769.5	37.9302
32770.5	73.102302
32771.5	74.082801
32772.5	54.6779
32773.5	136.8
32774.5	107.748
32775.5	106.125
32776.5	74.9005
32777.5	53.959201
32778.5	61.1283
32779.5	103.682
32780.5	85.7587
32781.5	71.1793
32782.5	114.651
32783.5	121.363
32784.5	72.1114
32785.5	42.461
32786.5	33.9839
32787.5	58.7964
32788.5	53.1834
32789.5	68.6383
32790.5	65.7361
32791.5	68.4626
32792.5	111.129
32793.5	105.886
32794.5	90.302902
32795.5	90.790603
32796.5	86.443801
32797.5	82.3414
32798.5	57.9069
32799.5	54.900901
32800.5	66.8481
32801.5	83.1384
32802.5	48.5705
32803.5	60.3255
32804.5	76.8922
32805.5	112.675
32806.5	174.019
32807.5	122.158
32808.5	114.499
32809.5	46.726501
32810.5	82.6372
32811.5	98.5727
32812.5	78.1329
32813.5	87.1253
32814.5	114.685
32815.5	105.293
32816.5	89.164901
32817.5	101.242
32818.5	148.833
32819.5	114.626
32820.5	77.127403
32821.5	92.9191
32822.5	95.59
32823.5	100.878
32824.5	75.6795
32825.5	74.7474
32826.5	86.4013
32827.5	165.643
32828.5	94.3964
32829.5	104.79
32830.5	123.533
32831.5	91.7819
32832.5	78.4229
32833.5	133.202
32834.5	113.845
32835.5	175.474
32836.5	207.924
32837.5	86.477203
32838.5	60.2659
32839.5	72.7234
32840.5	54.9669
32841.5	54.329
32842.5	66.178901
32843.5	107.871
32844.5	89.269302
32845.5	86.5414
32846.5	77.887901
32847.5	50.540401
32848.5	60.7089
32849.5	89.388603
32850.5	134.234
32851.5	87.0905
32852.5	78.335502
32853.5	66.586303
32854.5	98.895103
32855.5	98.1777
32856.5	69.543403
32857.5	97.354301
32858.5	79.441703
32868.5	69.6102
32869.5	61.141101
32870.5	47.1615
32871.5	51.7584
32872.5	75.008201
32873.5	57.357
32874.5	64.3917
32875.5	66.34
32876.5	78.832901
32877.5	97.771301
32878.5	133.423
32879.5	125.432
32880.5	50.4279
32881.5	35.130401
32882.5	80.1306
32883.5	72.3704
32884.5	96.9406
32885.5	92.7651
32886.5	60.052501
32887.5	96.293601