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Camp Century Ice Core Data Readme

Byrd Polar Research Center Ice Core Files: Microparticle Analyses
Documentation transcribed at WDC/NSIDC, November 1990

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

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.

FILE FORMAT:

The original file has been split into three new files in a tab delimited format for ease of use. Each file (campcpart1.dat, campcpart2.dat, and campcpart3.dat) now has the first five (5) columns listed in record 1 below. Campcpart1.dat contains particles listed in record 1 below, campcpart2.dat contains particles listed in record 2 below and campcpart3.dat contains particles listed in record 3 below.
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.

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