Oxygen isotopes -- snowpits; GISP2 Site 13

REFERENCES: 

Bolzan, J.F., and M. Strobel. 1994. Accumulation-rate variations around
Summit, Greenland. Journal of Glaciology 40:56-66.

DATA DESCRIPTION: 

These files contain oxygen-isotope profiles for 9 shallow cores (to
approximately 17 m depth) recovered over a 150 x 150 km survey grid in
central Greenland.  All cores were recovered in May, 1987.  Isotopic data
in the upper 2 m of each profile were from the shallow drilling pits. 
Details on the site location, the core recovery, and the assignment of
core loss are given in Bolzan and Strobel, (1994). 

For the data below, all depths are in cm.  Dating of samples was based on
the seasonal variation in the oxygen isotope stratigraphy, along with
measurements of gross beta activity (see Bolzan and Strobel, 1994).  Time
is in decimal years, where 87 = 1987, etc. 

The first 2 columns refer to the true depth and age at the top of the
sample, where the age is based on a spline interpolation of the dating
described in Bolzan and Strobel (1994).  The time is in decimal calendar
years. 

Column 3 is density in kg/m3. 

Column 4 are the O18 values in per mil. 

Column 5 is the ice-equivalent depths at the top of the sample. 

SITE 13: N 72 53 11, W 39 09 24, 3167 m

DATA:

Depth Top	Cal. Year	Density	del18O	Ice depth
(cm)	Top	kg/m^3	(per mil)	(cm)

0	1987.69	321.3	-36.84	0
10	1987.49	385.56	-39.19	3.5
20	1987.27	337.82	-35.87	7.7
30	1987.09	340.58	-38.39	11.38
40	1986.91	300.19	-36.74	15.09
50	1986.75	292.84	-34.84	18.36
60	1986.59	302.94	-31.48	21.55
70	1986.41	324.05	-37.03	24.85
80	1986.21	369.95	-36.55	28.38
90	1986	388.31	-35.76	32.41
100	1985.85	367.2	-36.62	36.64
110	1985.72	337.82	-28.78	40.64
120	1985.59	355.27	-26.84	44.32
130	1985.39	403.92	-36.01	48.19
140	1985.12	397.49	-37.1	52.59
150	1984.89	360.77	-36.65	56.92
160	1984.74	381.89	-31.54	60.85
170	1984.63	397.49	-30.45	65.01
180	1984.54	366.28	-29.95	69.34
190	1984.46	338.74	-35.65	73.33
200	1984.37	409.43	-31.87	78.06
205	1984.32	409.43	-30.83	80.29
210	1984.26	409.43	-32.4	82.52
215	1984.18	408.93	-35.15	84.75
220.5	1984.09	381.89	-36.27	87.2
225.5	1984	383.72	-36.06	89.28
230.5	1983.89	381.89	-34.57	91.37
235.5	1983.78	383.72	-33.06	93.45
240.5	1983.67	381.89	-31.74	95.54
245.5	1983.55	383.72	-31.27	97.62
250.5	1983.45	385.56	-31.35	99.71
255.5	1983.36	389.23	-33.23	101.81
260.5	1983.27	387.4	-35.17	103.93
265.5	1983.18	389.23	-38.02	106.04
270.5	1983.09	389.23	-39.67	108.16
275.5	1983	387.4	-39.97	110.28
280.5	1982.9	389.23	-39.11	112.39
285.5	1982.79	389.23	-37.37	114.51
290.5	1982.67	389.23	-34.4	116.63
295.5	1982.56	365.36	-32.27	118.75
300.5	1982.45	359.86	-32.99	120.74
305.5	1982.34	385.56	-36.63	122.7
310.5	1982.22	385.56	-39.93	124.8
315.5	1982.11	385.56	-41.85	126.9
320.5	1982	385.56	-42.13	129
325.5	1981.89	385.56	-40.69	131.1
330.5	1981.78	385.56	-36.99	133.2
335.5	1981.67	385.56	-33.58	135.3
340.5	1981.56	385.56	-32.28	137.4
345.5	1981.44	385.56	-33.21	139.5
350.5	1981.33	367.2	-35.37	141.6
355.5	1981.22	361.69	-37.16	143.6
360.5	1981.12	361.69	-40.22	145.57
365.5	1981.04	334.15	-43.98	147.54
370.5	1980.97	334.15	-43.1	149.36
375.5	1980.91	333.82	-39	151.18
381	1980.77	407.59	-38.24	156.82
386	1980.71	409.43	-37.95	159.04
391	1980.66	407.26	-36.18	161.27
396.5	1980.59	385.56	-32.92	163.71
402	1980.5	385.56	-33.23	166.02
407.5	1980.39	385.56	-35.82	168.33
413	1980.28	387.4	-37.56	170.64
418	1980.16	387.4	-38.52	172.75
423	1980.05	389.23	-39.17	174.86
428	1979.95	387.4	-38.16	176.98
433	1979.86	387.4	-36.07	179.09
438	1979.58	464.51	-32.59	184.9
443	1979.42	466.35	-33.74	187.43
448	1979.24	435.13	-36.89	189.97
453	1979.07	433.3	-38.5	192.34
458	1978.94	433.3	-37.05	194.7
463	1978.83	433.3	-35.52	197.06
468	1978.74	433.3	-32.31	199.42
473	1978.68	433.3	-30.17	201.78
478	1978.61	443.98	-28	204.14
483.5	1978.54	446.15	-26.88	206.8
488.5	1978.46	444.31	-27.61	209.23
493.5	1978.36	396.58	-32.54	211.65
498.5	1978.27	403.92	-36.31	213.81
503.5	1978.16	405.76	-37.32	216.01
508.5	1978.05	405.75	-37.24	218.22
513.5	1977.95	407.59	-36.95	220.43
518.5	1977.84	405.76	-35.89	222.65
523.5	1977.73	405.76	-34.21	224.86
528.5	1977.64	412.26	-31.84	227.07
534	1977.54	418.61	-31.36	229.54
539	1977.46	416.77	-32.24	231.82
544	1977.4	417.27	-34.25	234.09
549.5	1977.35	418.61	-35.8	236.59
554.5	1977.24	471.85	-34.68	242.1
559.5	1977.19	470.02	-37.02	244.67
564.5	1977.13	471.85	-38.93	247.23
569.5	1977.05	471.85	-39.26	249.8
574.5	1976.95	471.24	-38.47	252.37
579	1976.84	440.64	-35.42	254.68
584	1976.72	424.32	-33.08	257.08
588.5	1976.62	460.84	-31.55	259.16
593.5	1976.5	460.83	-31.43	261.67
598.5	1976.39	460.84	-32.72	264.18
603.5	1976.3	462.67	-35.34	266.69
608.5	1976.2	460.84	-36.96	269.21
613.5	1976.1	457.16	-37.88	271.72
618.5	1976	438.81	-37.94	274.21
623.5	1975.89	438.8	-36.7	276.6
628.5	1975.77	440.64	-33.88	278.99
633.5	1975.65	438.8	-32.16	281.39
638.5	1975.55	438.81	-31.41	283.78
643.5	1975.39	460.83	-32.25	288.35
648.5	1975.33	459	-32.83	290.86
654	1975.26	471.85	-34.15	293.61
659	1975.2	470.02	-35.99	296.18
664	1975.14	470.02	-38.2	298.74
669	1975.05	470.02	-38.67	301.3
674	1974.94	471.85	-36.43	303.86
679	1974.81	469.01	-33.42	306.43
684.5	1974.65	470.02	-32.15	309.24
689.5	1974.5	470.02	-32.19	311.8
694.5	1974.35	470.02	-34.09	314.36
699.5	1974.2	453.49	-37.29	316.92
704.5	1974.07	451.65	-37.65	319.39
709.5	1973.93	451.65	-35.82	321.85
714.5	1973.81	451.65	-34.49	324.31
719.5	1973.68	452.33	-32.78	326.77
725	1973.55	422.28	-33.8	329.48
730	1973.45	416.77	-32.76	331.78
735	1973.35	470.02	-33.33	334.05
740	1973.24	470.02	-35.06	336.61
745	1973.13	470.02	-36.59	339.17
750	1973	471.85	-36.86	341.73
755	1972.86	470.02	-35.28	344.3
760	1972.71	470.02	-32.82	346.86
765	1972.57	470.02	-31.26	349.42
770	1972.44	470.02	-32.23	351.98
775	1972.32	471.85	-34.79	354.54
780	1972.22	468.18	-38.81	357.11
785	1972.13	468.18	-40.84	359.66
790	1972.05	480.7	-42.01	362.21
795.5	1971.96	481.03	-40.27	365.09
800.5	1971.88	481.03	-38.2	367.71
805.5	1971.8	481.04	-35.42	370.33
810.5	1971.73	480.69	-32.94	372.95
816	1971.65	446.15	-32.81	375.83
821	1971.59	446.15	-32.02	378.26
826	1971.53	446.15	-30.53	380.69
831	1971.47	444.31	-31.42	383.12
836	1971.41	490.21	-32.5	385.54
841	1971.35	488.38	-34.02	388.21
846	1971.29	488.38	-34.27	390.87
851	1971.23	490.21	-34.98	393.53
856	1971.16	488.37	-36.05	396.2
861	1971.08	490.21	-37.9	398.86
866	1971	488.38	-37.92	401.53
871	1970.9	488.38	-36.98	404.19
876	1970.75	479.03	-35.76	406.85
881.5	1970.49	479.19	-36	409.72
886.5	1970.16	479.2	-37.2	412.33
891.5	1969.87	477.36	-36.76	414.94
896.5	1969.7	479.03	-35.72	417.54
902	1969.57	501.23	-34.45	420.41
907	1969.42	501.22	-36.59	423.14
912	1969.25	503.06	-38.91	425.87
917	1969.07	501.23	-40.31	428.61
922	1968.94	501.23	-39.55	431.34
927	1968.84	501.22	-37.61	434.07
932	1968.74	479.03	-34.69	436.8
937.5	1968.6	477.36	-34.09	439.67
943	1968.38	477.36	-35.03	442.53
948	1968.12	479.19	-35.42	445.13
953	1967.89	477.36	-34.83	447.74
958	1967.72	477.36	-33.84	450.34
963	1967.57	495.72	-33.53	452.94
968	1967.43	517.75	-34.06	455.64
973	1967.29	519.59	-34.78	458.46
978	1967.16	497.39	-36.8	461.29
983.5	1967.04	470.02	-38.12	464.27
988.5	1966.97	471.85	-37.4	466.83
993.5	1966.91	471.85	-36.02	469.4
998.5	1966.88	519.59	-37.2	471.97
1003.5	1966.85	519.59	-37.43	474.8
1008.5	1966.83	519.59	-36.38	477.63
1013.5	1966.8	519.59	-36	480.46
1018.5	1966.75	519.59	-34.7	483.29
1023.5	1966.68	519.09	-33.22	486.12
1029	1966.57	517.75	-32.66	489.23
1034	1966.42	517.75	-33.7	492.05
1039	1966.25	517.75	-36.25	494.87
1044	1966.07	515.92	-37.81	497.69
1049	1965.94	517.75	-37.01	500.5
1054	1965.85	518.16	-36.07	503.32
1058.5	1965.78	482.87	-34.32	505.86
1063.5	1965.72	484.71	-33.52	508.49
1068.5	1965.64	543.46	-32.39	511.13
1073.5	1965.5	541.61	-32.72	514.09
1078.5	1965.31	528.77	-32.82	517.04
1083.5	1965.1	526.93	-34.48	519.92
1088.5	1964.91	526.93	-34.33	522.79
1093.5	1964.77	526.94	-32.96	525.66
1098.5	1964.63	519.58	-32.06	528.53
1103.5	1964.5	517.75	-32.53	531.36
1108.5	1964.35	517.75	-33.77	534.18
1113.5	1964.18	517.75	-34.7	537
1118.5	1964	517.75	-34.81	539.82
1123.5	1963.83	519.58	-34	542.64
1128.5	1963.67	528.77	-32.94	545.47
1133.5	1963.56	528.77	-31.91	548.35
1138.5	1963.5	526.93	-31.45	551.23
1143.5	1963.5	528.77	-32.53	554.1
1148.5	1963.5	528.77	-33.5	556.98
1153.5	1963.43	526.93	-35.02	559.86
1158.5	1963.2	528.77	-35.88	562.73
1163.5	1962.75	532.44	-32.79	565.61
1168.5	1962.31	532.43	-35.02	568.51
1173.5	1962.11	532.44	-35.81	571.41
1178.5	1962	532.44	-35.81	574.31
1183.5	1961.88	532.43	-35.39	577.21
1188.5	1961.74	532.44	-34.7	580.11
1193.5	1961.58	532.43	-34.14	583.01
1198.5	1961.42	489.05	-35.43	585.91
1204	1961.25	436.96	-36.49	588.84
1209	1961.12	436.97	-37.46	591.22
1214	1961.01	492.38	-37.17	593.6
1219.5	1960.88	541.62	-35.95	596.55
1224.5	1960.76	541.62	-33.46	599.5
1229.5	1960.64	541.62	-31.14	602.45
1234.5	1960.5	541.61	-30.47	605.4
1239.5	1960.33	529.11	-33.19	608.35
1245	1960.11	515.92	-33.82	611.52
1250	1959.88	515.92	-31.75	614.33
1255	1959.62	514.07	-30.56	617.14
1260.5	1959.4	536.12	-32.48	620.22
1265.5	1959.25	534.27	-34.05	623.14
1270.5	1959.14	534.28	-35.52	626.05
1275.5	1959.05	536.11	-35.97	628.96
1280.5	1958.94	534.27	-35.54	631.88
1285.5	1958.82	534.28	-34.08	634.79
1290.5	1958.68	536.11	-31.92	637.7
1295.5	1958.56	534.28	-30.76	640.62
1300.5	1958.45	534.27	-30.88	643.53
1305.5	1958.36	535.78	-32.71	646.44
1311	1958.27	537.95	-34.54	649.65
1316	1958.18	537.95	-35.9	652.58
1321	1958.07	548.96	-36.25	655.51
1326	1957.92	556.31	-35.38	658.5
1331	1957.74	558.14	-34.55	661.53
1336	1957.57	548.96	-33.58	664.57
1341	1957.44	532.44	-34.18	667.56
1346	1957.37	532.43	-34.61	670.46
1351	1957.3	532.44	-36.42	673.36
1356	1957.22	541.62	-36.17	676.26
1361	1957.09	561.82	-37.02	679.21
1366	1956.88	561.82	-35.28	682.27
1371	1956.62	561.82	-35.18	685.33
1376	1956.39	542.45	-35.48	688.39
1381.5	1956.22	541.62	-36.98	691.64
1386.5	1956.1	541.61	-38.92	694.59
1391.5	1956	541.62	-39.11	697.54
1396.5	1955.9	541.62	-37.69	700.49
1401.5	1955.78	536.52	-34.55	703.44
1406	1955.66	536.11	-33.06	706.07
1411	1955.5	536.11	-33.19	708.99
1416	1955.31	537.96	-33.74	711.91
1421	1955.1	550.8	-36.44	714.84
1426.5	1954.91	552.64	-36.01	718.14
1431.5	1954.77	550.8	-34.49	721.15
1436.5	1954.66	552.63	-32.99	724.15
1441.5	1954.55	552.64	-32.07	727.16
1446.5	1954.45	537.95	-33.32	730.17
1451.5	1954.33	536.12	-35.74	733.1
1456.5	1954.21	561.82	-36.38	736.02
1461.5	1954.07	602.2	-37.05	739.08
1466.5	1953.92	558.96	-36.36	742.36
1471	1953.8	561.82	-34.89	745.1
1476	1953.65	559.99	-34.04	748.16
1481	1953.5	561.82	-34.02	751.21
1486	1953.35	559.98	-35.32	754.27
1491	1953.21	561.82	-37.38	757.32
1496	1953.09	559.98	-38.38	760.38
1501	1953	561.82	-38.19	763.43
1506	1952.95	559.98	-36.73	766.49
1511	1952.9	559.99	-35.71	769.54
1516	1952.81	561.82	-34.43	772.59
1521	1952.63	545.29	-34.09	775.65
1526	1952.34	543.46	-34.38	778.62
1531	1952	545.29	-34.16	781.58
1536	1951.76	544.68	-33.57	784.55
1540.5	1951.62	547.14	-32.79	787.22
1545.5	1951.5	545.29	-32.71	790.2
1550.5	1951.38	545.3	-33.47	793.17
1555.5	1951.26	567.32	-34.5	796.14
1560.5	1951.13	580.18	-36.22	799.23
1565.5	1951	578.33	-36.29	802.39
1570.5	1950.88	580.18	-34.01	805.54
1575.5	1950.77	580.17	-32.64	808.7
1580.5	1950.66	563.65	-31.32	811.86
1585.5	1950.56	559.98	-30.5	814.93
1590.5	1950.44	561.82	-30.67	817.98
1595.5	1950.32	559.99	-32.1	821.04
1600.5	1950.19	559.98	-33.92	824.09
1605.5	1950.07	561.82	-36.49	827.14
1610.5	1949.93	466.65	-35.98	830.2
1616.5	1949.81	509.07	-33.74	833.25
1622	1949.68	468.18	-33.37	836.3