Oxygen isotopes -- snowpits; GISP2 Site 44

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 44: N 72 17 38, W 37 55 17, 3215 m				

DATA:				

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

0	1987.44	347.92	-28.12	0
3.79	1987.37	367.2	-31.06	3.79
7.79	1987.29	400.25	-35.39	7.79
12.15	1987.22	396.58	-35.46	12.15
16.47	1987.15	380.05	-39.11	16.47
20.61	1986.85	398.41	-41.71	20.61
24.95	1986.59	355.27	-39.4	24.95
28.82	1986.42	312.12	-29.31	28.82
32.22	1986.3	320.38	-32.17	32.22
35.71	1986.22	312.12	-32.26	35.71
39.11	1986.15	381.89	-34.38	39.11
43.27	1986.06	390.15	-39.16	43.27
47.52	1985.92	402.08	-40.02	47.52
51.9	1985.74	417.69	-39.05	51.9
56.45	1985.58	350.68	-33.21	56.45
60.27	1985.43	378.22	-28.87	60.27
64.39	1985.33	369.04	-33.44	64.39
68.41	1985.22	379.13	-34.71	68.41
72.54	1985.09	384.64	-35.62	72.54
76.73	1984.89	392.9	-36.73	76.73
81.81	1984.73	391.07	-32.8	81.81
83.94	1984.61	389.23	-32.14	83.94
86.06	1984.5	380.05	-30.53	86.06
88.13	1984.41	376.38	-30.86	88.13
90.18	1984.32	376.38	-33.57	90.18
92.23	1984.25	378.22	-35.76	92.23
94.29	1984.18	376.38	-37.33	94.29
96.34	1984.11	376.38	-40.41	96.34
98.39	1984.04	376.38	-44.02	98.39
100.44	1983.96	374.54	-44.8	100.44
102.48	1983.87	374.54	-43.38	102.48
104.52	1983.78	376.38	-40.49	104.52
106.57	1983.7	370.87	-37.8	106.57
108.59	1983.61	354.35	-35.77	108.59
110.52	1983.54	354.35	-34.69	110.52
112.45	1983.47	354.35	-33.18	112.45
114.38	1983.4	358.02	-34.04	114.38
116.33	1983.34	363.53	-36.36	116.33
118.31	1983.28	370.87	-38.85	118.31
120.33	1983.22	394.74	-40.15	120.33
122.48	1983.14	394.74	-39.77	122.48
124.63	1983.05	394.74	-40.89	124.63
126.78	1982.94	394.74	-41.45	126.78
128.93	1982.82	394.74	-39.46	128.93
131.08	1982.69	381.89	-34.52	131.08
133.16	1982.56	370.87	-31.77	133.16
135.18	1982.44	370.87	-30.79	135.18
137.2	1982.32	374.55	-32.54	137.2
139.24	1982.2	392.9	-36.71	139.24
141.38	1982.1	394.74	-38.3	141.38
143.53	1982	392.9	-39.2	143.53
145.67	1981.91	394.74	-39.02	145.67
147.82	1981.83	392.9	-37.5	147.82
149.96	1981.76	398.41	-34.77	149.96
152.13	1981.67	424.12	-31.58	152.13
154.44	1981.59	424.12	-30.07	154.44
160.89	1981.29	377.21	-29.9	160.89
163.15	1981.18	378.22	-32.18	163.15
165.21	1981.06	398.91	-37.84	165.21
167.6	1980.95	398.41	-40.06	167.6
169.77	1980.84	398.41	-38.95	169.77
171.94	1980.74	398.91	-36.24	171.94
174.33	1980.65	451.65	-35.24	174.33
176.79	1980.56	451.66	-33.45	176.79
179.25	1980.5	420.44	-28.62	179.25
181.54	1980.45	418.61	-28.77	181.54
183.82	1980.41	420.44	-30.89	183.82
186.11	1980.37	420.61	-33.61	186.11
193.59	1980.24	413.1	-36.97	193.59
195.84	1980.18	411.27	-38.45	195.84
198.08	1980.1	413.1	-39.76	198.08
200.33	1980	411.27	-41.1	200.33
202.57	1979.88	413.1	-41.01	202.57
204.82	1979.74	411.26	-38.87	204.82
207.06	1979.58	413.1	-35.18	207.06
209.31	1979.42	411.27	-33.29	209.31
211.55	1979.24	424.12	-35.08	211.55
213.86	1979.07	438.8	-39.24	213.86
216.25	1978.93	440.64	-39.62	216.25
218.65	1978.82	440.64	-37.86	218.65
221.05	1978.73	438.8	-36.57	221.05
223.44	1978.65	440.64	-36.05	223.44
225.84	1978.58	438.8	-34.02	225.84
228.23	1978.5	409.43	-30.19	228.23
230.46	1978.41	403.92	-30.18	230.46
232.66	1978.32	405.75	-31.92	232.66
234.87	1978.22	403.92	-33.1	234.87
237.07	1978.11	405.75	-34.25	237.07
239.28	1978	449.82	-35.42	239.28
241.73	1977.89	451.66	-35.23	241.73
244.19	1977.79	449.82	-33.84	244.19
246.64	1977.69	449.82	-31.41	246.64
249.09	1977.59	433.3	-29.18	249.09
251.45	1977.5	427.79	-28.14	251.45
253.78	1977.41	429.62	-28.17	253.78
256.12	1977.32	431.46	-28.55	256.12
258.47	1977.22	449.82	-29.55	258.47
260.92	1977.13	447.98	-31.52	260.92
263.36	1977.04	462.68	-33.75	263.36
265.88	1976.96	473.69	-36.89	265.88
268.46	1976.87	475.52	-36.37	268.46
271.05	1976.79	473.69	-35.33	271.05
273.63	1976.7	475.52	-33.92	273.63
276.22	1976.6	473.69	-31.54	276.22
278.8	1976.5	475.53	-30.28	278.8
281.39	1976.39	451.65	-30.29	281.39
283.85	1976.27	442.48	-31.15	283.85
286.26	1976.16	424.12	-35.82	286.26
288.57	1976.05	424.12	-37.9	288.57
290.88	1975.95	424.12	-38.53	290.88
293.19	1975.85	440.64	-38.13	293.19
295.59	1975.75	446.15	-37.24	295.59
298.02	1975.66	446.15	-35.24	298.02
300.45	1975.58	446.15	-31.83	300.45
302.88	1975.5	488.38	-30.09	302.88
305.54	1975.42	468.18	-30.24	305.54
308.09	1975.36	438.81	-31.57	308.09
310.48	1975.29	440.64	-33.05	310.48
312.88	1975.22	438.8	-34.78	312.88
315.27	1975.14	440.64	-37.93	315.27
317.67	1975.05	438.8	-41.01	317.67
320.06	1974.95	440.64	-41.92	320.06
322.46	1974.83	464.51	-40.79	322.46
324.99	1974.7	482.87	-37.26	324.99
327.62	1974.56	477.36	-34.38	327.62
330.22	1974.44	451.65	-33.21	330.22
332.68	1974.31	451.66	-34.41	332.68
335.14	1974.19	451.65	-37.72	335.14
337.6	1974.06	453.49	-39.94	337.6
340.07	1973.94	450.84	-40.47	340.07
342.28	1973.81	452.88	-39.19	342.28
344.5	1973.68	462.67	-36.36	344.5
347.02	1973.55	462.68	-34.04	347.02
349.54	1973.45	462.67	-32.84	349.54
352.06	1973.38	462.67	-33.4	352.06
361.1	1973.2	488.38	-35.06	361.1
363.76	1973.14	488.38	-36.15	363.76
366.42	1973.05	488.37	-36.3	366.42
369.08	1972.94	464.51	-37.2	369.08
371.61	1972.85	359.04	-35.48	371.61
378.31	1972.44	481.03	-32.32	378.31
380.93	1972.34	482.87	-32.77	380.93
383.56	1972.25	481.03	-34.93	383.56
386.18	1972.18	481.03	-36.97	386.18
388.8	1972.11	481.04	-36.83	388.8
391.42	1972.04	482.86	-37.82	391.42
394.05	1971.96	481.04	-38.67	394.05
396.67	1971.87	481.03	-37.65	396.67
399.29	1971.77	479.19	-35.04	399.29
401.9	1971.67	475.52	-32.83	401.9
404.49	1971.56	477.36	-29.85	404.49
407.09	1971.44	477.36	-29.17	407.09
409.69	1971.32	497.55	-30.84	409.69
412.4	1971.19	517.75	-34.56	412.4
415.22	1971.06	512.25	-36.64	415.22
418.01	1970.93	504.9	-37.98	418.01
420.76	1970.8	506.73	-36.43	420.76
423.52	1970.68	506.74	-33.96	423.52
426.28	1970.55	499.39	-32.1	426.28
429	1970.45	471.85	-31.53	429
431.57	1970.35	471.85	-33.07	431.57
434.14	1970.25	471.85	-35.19	434.14
436.71	1970.16	471.85	-36.84	436.71
439.28	1970.06	471.85	-38.17	439.28
441.85	1969.94	493.88	-38.87	441.85
444.54	1969.82	492.05	-37.73	444.54
447.22	1969.69	492.05	-35.39	447.22
449.9	1969.56	493.88	-32.9	449.9
452.59	1969.44	501.84	-31.96	452.59
455.05	1969.3	504.9	-33.31	455.05
457.8	1969.18	503.88	-34.59	457.8
460.27	1969.06	504.9	-36.35	460.27
463.02	1968.94	504.9	-36.38	463.02
465.77	1968.85	505.92	-36.19	465.77
468.25	1968.75	506.74	-35.16	468.25
471.01	1968.65	523.26	-32.89	471.01
473.86	1968.54	523.26	-31.44	473.86
476.71	1968.45	457.17	-30.68	476.71
479.2	1968.36	477.36	-31.36	479.2
481.8	1968.25	495.72	-33.86	481.8
484.5	1968.15	495.72	-36.66	484.5
487.2	1968.05	493.88	-39.82	487.2
489.89	1967.95	495.72	-41.22	489.89
492.59	1967.85	495.72	-40.24	492.59
495.29	1967.73	495.72	-37.57	495.29
497.99	1967.59	493.88	-35.56	497.99
500.68	1967.4	495.72	-34.64	500.68
503.38	1967.19	503.06	-35.02	503.38
506.12	1967	508.58	-36.51	506.12
508.89	1966.87	508.57	-36.6	508.89
511.66	1966.78	508.57	-35.18	511.66
516.51	1966.63	510.74	-33.55	516.51
519.57	1966.5	510.4	-31.74	519.57
522.35	1966.32	510.41	-31.68	522.35
525.13	1966.1	506.74	-33.11	525.13
527.89	1965.9	501.22	-35.26	527.89
530.62	1965.72	501.22	-34.85	530.62
533.35	1965.57	499.4	-33.63	533.35
536.07	1965.44	501.22	-33.14	536.07
538.8	1965.32	508.58	-33.83	538.8
541.57	1965.21	514.08	-34.5	541.57
544.37	1965.1	515.92	-34.58	544.37
547.18	1965	515.92	-35.7	547.18
549.99	1964.89	514.08	-35.76	549.99
552.79	1964.78	515.92	-34.6	552.79
555.6	1964.66	515.92	-32.67	555.6
558.41	1964.55	523.27	-32.12	558.41
561.26	1964.45	532.43	-31.77	561.26
564.16	1964.36	530.61	-31.63	564.16
567.05	1964.28	530.61	-32.65	567.05
569.94	1964.2	530.61	-34.39	569.94
572.83	1964.12	530.6	-36.28	572.83
575.72	1964.04	530.61	-37.03	575.72
578.61	1963.96	530.61	-37.34	578.61
581.5	1963.87	528.77	-36.58	581.5
584.38	1963.77	526.93	-36.04	584.38
587.25	1963.68	517.75	-34.35	587.25
590.07	1963.59	515.92	-32.68	590.07
592.88	1963.5	515.92	-31.14	592.88
595.69	1963.42	515.92	-30.86	595.69
598.5	1963.33	515.92	-32.47	598.5
601.31	1963.22	521.43	-34.11	601.31
604.15	1963.08	532.43	-35.08	604.15
607.05	1962.91	532.44	-35.5	607.05
609.95	1962.7	530.61	-35.01	609.95
612.84	1962.5	532.43	-33.99	612.84
615.74	1962.33	530.61	-34.02	615.74
618.63	1962.18	519.59	-36.46	618.63
621.46	1962.06	517.75	-39	621.46
624.28	1961.95	537.95	-39.95	624.28
627.21	1961.84	547.12	-39.09	627.21
630.19	1961.75	545.29	-36.5	630.19
633.16	1961.65	545.3	-33.65	633.16
636.13	1961.55	540.78	-31.56	636.13
639.37	1961.45	534.28	-30.36	639.37
642.28	1961.34	532.43	-30.91	642.28
645.18	1961.22	534.28	-32.55	645.18
648.09	1961.08	534.27	-34.64	648.09
651	1960.92	534.27	-35.99	651
653.91	1960.75	534.28	-35.56	653.91
656.82	1960.58	532.43	-34.91	656.82
659.72	1960.43	532.44	-33.71	659.72
662.62	1960.3	510.41	-34.13	662.62
665.4	1960.18	510.4	-35.41	665.4
668.18	1960.09	530.61	-36.77	668.18
671.07	1960	539.78	-37.88	671.07
674.01	1959.93	537.95	-38.05	674.01
676.94	1959.86	537.95	-37.28	676.94
679.87	1959.8	539.78	-36	679.87
682.81	1959.73	541.62	-35.02	682.81
685.76	1959.65	547.12	-33.44	685.76
688.74	1959.56	545.3	-32.9	688.74
691.71	1959.44	545.29	-32.41	691.71
694.68	1959.3	554.48	-33.91	694.68
697.7	1959.15	545.29	-36.17	697.7
700.67	1959	547.14	-37.33	700.67
703.65	1958.87	547.12	-37.15	703.65
706.63	1958.75	517.75	-35.51	706.63
709.45	1958.65	515.92	-33.58	709.45
712.26	1958.55	515.92	-32.43	712.26
715.07	1958.45	521.42	-31.85	715.07
717.91	1958.36	526.94	-32.52	717.91
720.78	1958.27	532.43	-34.07	720.78
723.68	1958.19	541.62	-36.13	723.68
726.63	1958.09	541.62	-37.92	726.63
729.58	1958	541.62	-39.25	729.58
732.53	1957.9	543.45	-39.34	732.53
735.49	1957.8	537.95	-38.34	735.49
738.42	1957.68	536.12	-36.74	738.42
741.34	1957.56	534.27	-35.46	741.34
744.25	1957.43	534.27	-34.44	744.25
747.16	1957.29	534.28	-36.07	747.16
750.07	1957.15	534.27	-38.49	750.07
752.98	1957.01	534.28	-39.6	752.98
755.89	1956.84	557.47	-39.75	755.89
759.23	1956.7	558.15	-38.04	759.23
762.27	1956.56	554.46	-35.64	762.27
765.29	1956.44	552.64	-33.68	765.29
768.3	1956.32	552.64	-33.57	768.3
771.31	1956.22	552.64	-33.88	771.31
774.32	1956.11	552.64	-35.14	774.32
777.33	1956	552.64	-34.89	777.33
780.34	1955.89	552.63	-34.71	780.34
783.35	1955.77	554.48	-34.81	783.35
786.37	1955.66	552.64	-34.17	786.37
789.38	1955.55	554.48	-34.18	789.38
792.4	1955.45	552.63	-33.6	792.4
795.41	1955.37	547.14	-34.49	795.41
798.39	1955.29	536.11	-36.09	798.39
801.31	1955.21	537.95	-37.78	801.31
806.9	1955.05	546.72	-38.98	806.9
809.58	1954.94	548.96	-39.62	809.58
812.57	1954.82	547.12	-38.65	812.57
815.55	1954.69	547.14	-36.62	815.55
818.53	1954.56	543.45	-33.97	818.53
821.49	1954.44	545.3	-33.79	821.49
824.46	1954.32	543.45	-33.99	824.46
827.42	1954.21	543.46	-34.87	827.42
830.38	1954.11	545.29	-36.49	830.38
833.35	1954	543.46	-37.4	833.35
836.31	1953.89	556.31	-37.62	836.31
839.34	1953.78	559.98	-36.63	839.34
842.39	1953.67	559.98	-33.9	842.39
845.44	1953.56	559.98	-32.37	845.44
848.49	1953.44	510.74	-31.99	848.49
851.55	1953.33	559.98	-32.26	851.55
854.6	1953.22	509.08	-34.08	854.6