Time series of tiltmeter observations (tilt about two horizontal axes in microradians) for a 34 day period on iceberg C16 while it was aground near Ross Island in late 2001 to early 2002. Data shows tilts associated with differential basal melting of the iceberg, tidal motion and short-term tilts induced by iceberg tremor phenomena triggered by collisions between B15A and C16. The sample rate was 5 seconds. Data are available in comma-delimited ASCII format. Data are available via FTP.
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Iceberg Tiltmeter Measurements, Antarctica, Version 1
Geographic Coverage
Spatial Coverage: |
|
---|---|
Spatial Resolution: | Not Specified |
Temporal Coverage: |
|
Temporal Resolution: | Not specified |
Parameter(s): |
|
Platform(s) | FIELD INVESTIGATION, FIELD SURVEYS |
Sensor(s): | Not specified |
Data Format(s): |
|
Version: | V1 |
Data Contributor(s): | Douglas MacAyeal, Young-Jin Kim, Andrew Bliss |
Metadata XML: | View Metadata Record |
Data Citation
As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.
MacAyeal, D. R., Y. Kim, and A. Bliss. 2008. Iceberg Tiltmeter Measurements, Antarctica, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5GF0RFF. [Date Accessed].Detailed Data Description
Comma-delimited ASCII format .txt file
data_structure: columns - year, month, day, hour, minute, second,
y_tilt x_tilt y is considered "north", x is considered "east"
Units are microradians for tilt.
Files are named according to the following convention:
C16_tilt.txt
where:
Variable | Description |
---|---|
C16 | Iceberg |
tilt | measurement |
.txt | file format |
10 Megabytes
Iceberg C16, Ross Sea, Antarctica
Southernmost Latitude: 77 South
Northernmost Latitude: 77 South
Westernmost Longitude: 168 East
Easternmost Longitude: 168 East
Spatial Resolution
5 meter sensitivity, 100 meter overall accuracy
20 December 2001to 23 January 2002
Temporal Resolution
5 seconds
Parameters include iceberg tilt, iceberg time, latitude and longitude, iceberg weather (AWS), ice shelf motion, ice shelf surface temperature, ice shelf weather, iceberg snow accumulation
Sample Data Record
Tilt units are microradians relative to initial arbitrary instrument level.
year
|
month
|
day
|
hour
|
minute
|
second
|
y-tilt (north)
|
x-tilt (east)
|
---|---|---|---|---|---|---|---|
2001
|
12
|
20
|
16
|
3
|
30
|
-2.460000e+01
|
-5.456000e+01
|
2001
|
12
|
20
|
16
|
3
|
35
|
-2.325000e+01
|
-5.306000e+01
|
2001
|
12
|
20
|
16
|
3
|
40
|
-2.257000e+01
|
-5.222000e+01
|
2001
|
12
|
20
|
16
|
3
|
45
|
-2.223000e+01
|
-5.188000e+01
|
2001
|
12
|
20
|
16
|
3
|
50
|
-2.189000e+01
|
-5.155000e+01
|
2001
|
12
|
20
|
16
|
3
|
55
|
-2.172000e+01
|
-5.138000e+01
|
2001
|
12
|
20
|
16
|
4
|
0
|
-2.172000e+01
|
-5.138000e+01
|
2001
|
12
|
20
|
16
|
4
|
4
|
-2.274000e+01
|
-5.172000e+01
|
2001
|
12
|
20
|
16
|
4
|
10
|
-2.274000e+01
|
-5.289000e+01
|
2001
|
12
|
20
|
16
|
4
|
15
|
-2.291000e+01
|
-5.255000e+01
|
Software and Tools
Data Acquisition and Processing
An Applied Geomechanics Model 701-2 platform tiltmeter was deployed on a 1 meter 4x4 inch post (with aluminum platform securely fitted to top of post) that was buried in a snow pit near the automatic weather station near the center of iceberg C16. This instrument reported tilt on two axes every 5 seconds and was logged with a CR10x data logger.
Applied Geomechanics Model 701-2 platform tiltmeter logged with a CR10x data logger.
References and Related Publications
Contacts and Acknowledgments
Douglas MacAyeal
Department of Geophysical Sciences
University of Chicago
5734 S. Ellis Ave.
HGS 413
Chicago, Illinois 60637 USA
Young-Jin Kim
Department of Geophysical Sciences
University of Chicago
5734 S. Ellis Ave.
HGS 413
Chicago, Illinois 60637 USA
This research was supported by National Science Foundation (NSF) Office of Polar Programs (OPP) grant 0229546 awarded to D. MacAyeal.
Document Information
Document Creation Date
December 2008
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