Camp Century Ice Core Microparticle Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: Please cite original reference when using these data, plus the data file URL and date accessed. NAME OF DATA SET: Camp Century Ice Core Microparticle Data LAST UPDATE: 11/1990 (original recipt by WDC Paleo) CONTRIBUTOR: Thompson, L.G. ORIGINAL REFERENCES: Thompson, L.G. and E. Mosley-Thompson (1981) Temporal variability of microparticle properties in polar ice sheets. Journal of Volcanology and Geothermal Research, 11(1), p. 11-27. Thompson, L.G. (1977) Microparticles, Ice Sheets and Climate. Ohio State University. Institute of Polar Studies. Report 64, 148 pp. GEOGRAPHIC REGION: Greenland PERIOD OF RECORD: FUNDING SOURCES: DESCRIPTION: List of files: 6. CENTURY.DAT - Selected sections of the 1387-meter Camp Century, Greenland ice core were processed for microparticle concentration and size distribution. This file contains 685 samples representing 30 sections. These are all the sections ever made available to us for microparticle analysis. Camp Century, Greenland, 1387-meter core sections analyzed for microparticle concentration and size distribution by the Coulter technique: Section no. Depth in core (meters) Number of samples ----------- ---------------------- ----------------- 1 80.49 183 2 595.44 72 3 791.05 14 4 898.03 65 5 1043.74 20 6 1061.00 24 7 1065.97 17 8 1086.63 17 9 1108.97 5 10 1135.09 17 11 1155.56 18 12 1166.00 13 13 1174.71 15 14 1185.98 12 15 1197.68 8 16 1204.87 12 17 1214.97 12 18 1223.88 11 19 1234.48 17 20 1244.98 8 21 1255.14 13 22 1265.46 12 23 1278.83 11 24 1285.49 12 25 1295.59 10 26 1305.97 8 27 1324.76 13 28 1334.69 18 29 1345.43 12 30 1354.86 16 ------ Total 685 These samples are missing: Section no. Sample no. Depth of sample (meters) ----------- ---------- ------------------------ 523 25 595.935 842 14 1066.306 921 10 1174.888 The sample number 4 in section 921 at a depth of 1186.028 meters contained a larger number of particles than our current formatting allows. The six asterisks in line number 1451 should contain the value "1002101". FILE FORMAT: Record 1: Columns Format Description ------- ------ ----------- (01-06) I6 Date of sample analysis (07-10) I4 Section number (11-13) I3 Sample number (14-21) F8.3 Depth at the top of the sample (in meters) (22-26) F5.2 Size of the sample processed (in cm) (27-32) I6 Number of particles with diameters between 0.5-0.62 micrometers (33-38) I6 Number of particles with diameters between 0.63-0.79 micrometers (39-44) I6 Number of particles with diameters between 0.80-0.99 micrometers (45-50) I6 Number of particles with diameters between 1.0-1.24 micrometers (51-56) I6 Number of particles with diameters between 1.25-1.59 micrometers (57-62) I6 Number of particles with diameters between 1.6-1.99 micrometers (63-68) I6 Number of particles with diameters between 2.0-2.51 micrometers Record 2: Columns Format Description ------- ------ ----------- (01-06) I6 Number of particles with diameters between 2.52-3.16 micrometers (07-12) I6 Number of particles with diameters between 3.17-3.99 micrometers (13-18) I6 Number of particles with diameters between 4.0-4.99 micrometers (19-24) I6 Number of particles with diameters between 5.0-6.34 micrometers (25-30) I6 Number of particles with diameters between 6.35-7.99 micrometers (31-36) I6 Number of particles with diameters between 8.0-9.99 micrometers (37-42) I6 Number of particles with diameters between 10.0- 12.69 micrometers (43-48) I6 Number of particles with diameters between 12.7-16.0 micrometers (49-54) I6 Number of particles with diameters 0.5 micrometers or larger (55-60) I6 Number of particles with diameters 0.63 micrometers or larger (61-66) I6 Number of particles with diameters 0.80 micrometers or larger (67-72) I6 Number of particles with diameters 1.0 micrometers or larger Record 3: Columns Format Description ------- ------ ----------- (01-06) I6 Number of particles with diameters 1.25 micrometers or larger (07-12) I6 Number of particles with diameters 1.6 micrometers or larger (13-18) I6 Number of particles with diameters 2.0 micrometers or larger (19-24) I6 Number of particles with diameters 2.52 micrometers or larger (25-30) I6 Number of particles with diameters 3.17 micrometers or larger (31-36) I6 Number of particles with diameters 4.0 micrometers or larger (37-42) I6 Number of particles with diameters 5.0 micrometers or larger (43-48) I6 Number of particles with diameters 6.35 micrometers or larger (49-54) I6 Number of particles with diameters 8.0 micrometers or larger (55-60) I6 Number of particles with diameters 10.0 micrometers or larger (61-66) I6 Number of particles with diameters 12.7 micrometers or larger (67-71) F5.1 Coarseness factor which equals the number of particles with diameters 1.0 micrometers or larger, divided by the total number with diameters 0.5 micrometers or larger. (72) I1 This factor has three possible values which indicate the volume of sample analyzed by the Coulter procedure. (a) if factor = 0 a 500 microliter sample was processed, (b) if factor = 1 the sample is missing, (c) if factor = 2 a 50 microliter sample was processed.39-44) I6 Number of particles with diameters between 0.80-0.99 micrometers (45-50) I6 Number of particles with diameters between 1.0-1.24 micrometers (51-56) I6 Number of particles with diameters between 1.25-1.59 micrometers (57-62) I6 Number of particles with diameters between 1.6-1.99 micrometers (63-68) I6 Number of particles with diameters between 2.0-2.51 micrometers Record 2: Columns Format Description ------- ------ ----------- (01-06) I6 Number of particles with diameters between 2.52-3.16 micrometers (07-12) I6 Number of particles with diameters between 3.17-3.99 micrometers (13-18) I6 Number of particles with diameters between 4.0-4.99 micrometers (19-24) I6 Number of particles with diameters between 5.0-6.34 micrometers (25-30) I6 Number of particles with diameters between 6.35-7.99 micrometers (31-36) I6 Number of particles with diameters between 8.0-9.99 micrometers (37-42) I6 Number of particles with diameters between 10.0- 12.69 micrometers (43-48) I6 Number of particles with diameters between 12.7-16.0 micrometers (49-54) I6 Number of particles with diameters 0.5 micrometers or larger (55-60) I6 Number of particles with diameters 0.63 micrometers or larger (61-66) I6 Number of particles with diameters 0.80 micrometers or larger (67-72) I6 Number of particles with diameters 1.0 micrometers or larger Record 3: Columns Format Description ------- ------ ----------- (01-06) I6 Number of particles with diameters 1.25 micrometers or larger (07-12) I6 Number of particles with diameters 1.6 micrometers or larger (13-18) I6 Number of particles with diameters 2.0 micrometers or larger (19-24) I6 Number of particles with diameters 2.52 micrometers or larger (25-30) I6 Number of particles with diameters 3.17 micrometers or larger (31-36) I6 Number of particles with diameters 4.0 micrometers or larger (37-42) I6 Number of particles with diameters 5.0 micrometers or larger (43-48) I6 Number of particles with diameters 6.35 micrometers or larger (49-54) I6 Number of particles with diameters 8.0 micrometers or larger (55-60) I6 Number of particles with diameters 10.0 micrometers or larger (61-66) I6 Number of particles with diameters 12.7 micrometers or larger (67-71) F5.1 Coarseness factor which equals the number of particles with diameters 1.0 micrometers or larger, divided by the total number with diameters 0.5 micrometers or larger. (72) I1 This factor has three possible values which indicate the volume of sample analyzed by the Coulter procedure. (a) if factor = 0 a 500 microliter sample was processed, (b) if factor = 1 the sample is missing, (c) if factor = 2 a 50 microliter sample was processed.