This data set consists of sea ice measurements including thickness, salinity, and stable isotope composition from the Laptev Sea. The data were obtained during the Transdrift VI expedition to the Laptev Sea in April and May of 1999 as part of a project supported through the National Science Foundation (NSF) Arctic System Science (ARCSS) Program.
Sea ice cores were obtained with a 10 cm diameter corer. Ice thickness was measured in centimeters at the site with a tape measure. On-site, 2 cm thick horizontal sections were cut approximately every 10 cm down the core. Salinity of each sample was determined in practical salinity units (psu) using a salinity, conductivity, and temperature meter with an error of less than 0.02 or 1 percent of bulk salinity. Oxygen stable isotope (delta oxygen-18, or delta 18-O) measurements were then performed at the Stable Isotope Laboratory (Department of Physics and Astronomy, University of Calgary, Calgary, Canada) on a mass spectrometer at a precision of better than 0.4 parts per thousand, (ppt, 103).
Data are in a comma-separated variable ASCII format, and are available for download via FTP. Data are compiled for each coring location, though stable isotope measurements were not obtained for all samples.
Eicken, Hajo, and Andrey Proshutinsky. 2005. Thickness, salinity and stable isotope composition of sea ice samples from the Laptev Sea, 1999. Boulder, CO USA: National Center for Atmospheric Research
| Category | Description |
|---|---|
| Data format | Data are in comma separated variable ASCII text file. |
| Spatial coverage | Data were collected between 72.5893° N and 75.0745° N and between 124.9043° E and 131.6967° E. |
| Temporal coverage | Data were collected in April and May of 1999. |
| File size | Total data set is approximately 6 KB. |
| Parameter(s) | Parameters include sea ice thickness (cm), salinity (psu), and delta 18-O stable isotope composition (ppt). |
| Procedures for obtaining data | Data are available via FTP. |
1. Contacts and Acknowledgments
2. Detailed Data Description
3. Data Acquisition and Processing
4. References and Related Publications
5. Document Information
Hajo Eicken (Principal Investigator)
Geophysical Institute
University of Alaska Fairbanks
P.O. Box 757320
Fairbanks, AK 99775-7320
USA
Andrey Proshutinsky (co-Principal Investigator)
Woods Hole Oceanographic Institution
Mail Stop 29
Woods Hole, MA 02543
USA
Leonid Timokhov
Arctic and Antarctic Research Institute
32 Bering St.
St. Petersburg
Russia
Igor Dmitrenko
Arctic and Antarctic Research Institute
32 Bering St.
St. Petersburg
Russia
Andrei Darovskikh
Arctic and Antarctic Research Institute
32 Bering St.
St. Petersburg
Russia
The National Science Foundation (NSF) Arctic System Science (ARCSS) and Arctic Research Support and Logistics programs funded the data project. The following grant applies:
This research was supported by the National Science Foundation (NSF) Office of Polar Programs (OPP) grant 9876843.
The data are compiled in a comma-separated variable ASCII file (96 rows by 10 columns). The top row is a header that indicates the content of the various columns. Data are compiled for samples from each coring location, with each of the 95 data rows containing the data for one sample. The data are organized in 10 columns, as described in the table below. Because oxygen stable isotope data were not obtained for all samples, some rows contain no data in column 9. Comments (column 10) are provided for only a few samples.
| Column | Heading Name | Description |
|---|---|---|
1 |
Station ID | A number and code indicating from which coring location the sample was taken |
2 |
Lat | Latitude N, in decimal degrees, of specific location of the station |
3 |
Long | Longitude E, in decimal degrees, of specific location of the station |
4 |
Date | Sample date (month/day/year) |
5 |
H (cm) | Total ice thickness (in cm) at that particular location |
6 |
Sample ID | An indicator of which 2 cm horizontal section of the core comprised this sample (as "section number-station ID number", such as 3-1 for section number 3 from coring station number 1) |
7 |
Depth (cm) | Mid-depth of the sample (in cm) |
8 |
Salinity (psu) | Salinity (in psu) of the sample |
9 |
delta-18O (ppt) | Oxygen stable isotope (delta 18-O) composition (in ppt) |
10 |
Comments | Any applicable comments related to the sample |
Data are compiled into one comma-separated variable ASCII file, named "icecoredata.csv."
The single ASCII file is approximately 6 KB.
Southernmost Latitude: 72.5893° N
Northernmost Latitude: 75.0745° N
Westernmost Longitude: 124.9043° E
Easternmost Longitude: 131.6967° E
Data were collected in April and May of 1999.
Parameters include ice thickness (cm), salinity (psu), and delta 18-O stable isotope composition (ppt).
Three sample rows from the data file are shown below. The first row in the sample data is the header row that indicates the column contents. The second row is a sample that contains data for every possible column. The third sample row does not contain delta 18-O stable isotope data (column 9) nor comments (column 10).
Station ID,Lat,Long,Date,H (cm),Sample ID,Depth (cm),Salinity (psu),delta-18O (ppt),Comments
1 (TI9901),73.45733333,131.6966667,4/17/99,207,2-1,11,1,-9.6,some leakage from bag during melt
6 (TI9908),74.4255,124.9043333,4/26/99,70,1-6,3,9.4,
Sea ice cores were obtained with a 10 cm diameter corer. Ice thickness was measured at the site with a tape measure placed alongside the entire length of each core. On-site, 2 cm thick horizontal sections were cut approximately every 10 cm down each core.
Individual ice samples were transferred to sealed plastic bags, melted at room temperature within two days, and then poured into glass bottles with plastic screw-tops. The melted samples were taken back to the laboratory in Fairbanks, Alaska.
The salinity (in psu) of the samples was determined with a salinity, conductivity and temperature meter. This was a YSI Model 30 Handheld Salinity, Conductivity and Temperature System manufactured by YSI Environmental, with a measurement error of less than 0.02 or less than 1 percent of the bulk salinity, whichever is larger.
Within 12 months after sampling, oxygen stable isotope (delta 18-O) measurements were performed on a mass spectrometer at the Stable Isotope Laboratory (Department of Physics and Astronomy, University of Calgary, Calgary, Canada). The mass spectrometer was model VG 903, manufactured by V.G. Gas Analysis, with carbon dioxide equilibration with respect to Vienna Standard Mean Ocean Water (VSMOW) at a precision of better than 0.4 ppt.
No references or related publications are currently available.
ASCII: American Standard Code for Information Interchange
ARCSS: ARCSS Arctic System Science
FTP: File Transfer Protocol
NSF: National Science Foundation
URL: Uniform Resource Locator
July 2005
August 2005
August 2005