This data set contains high-resolution logs of dust and microbes measured at the Siple Dome A borehole in Antarctica. The data were obtained using a newly developed optical borehole logger, which fits into a fluid-filled borehole in glacial ice. It can detect dust and microbes in ice out to several meters from the borehole, and measure optical properties of those particles. The data set contains information on depth and optical signal. Data are available via FTP in data file format (.dat).
DOWNLOADING DATA VIA FTP
Data can be downloaded through a Web browser or command line via FTP. When using a Web browser, the FTP link first directs you to an Optional Registration Form that if filled out, will allow you to receive notifications about updates or processing changes related to that specific data set. After completing the Optional Registration Form, the FTP directory becomes available. For additional help downloading data through an FTP client, go to the How to access data using an FTP client support page.
Optical Logging for Dust and Microbes in Boreholes in Glacial Ice, Version 1
|Spatial Resolution:||Not Specified|
|Temporal Resolution:||Not specified|
|Platform(s)||FIELD INVESTIGATION, FIELD SURVEYS, LABORATORY|
|Sensor(s):||OPTICAL DUST LOGGERS|
|Data Contributor(s):||Ryan Bay|
|Metadata XML:||View Metadata Record|
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.Bay, R. 2009. Optical Logging for Dust and Microbes in Boreholes in Glacial Ice, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N59P2ZKB. [Date Accessed].
Detailed Data Description
This data set contains high-resolution logs of dust and microbes measured at the Siple Dome A borehole in Antarctica. The data were obtained using a newly developed optical borehole logger, which fits into a fluid-filled borehole in glacial ice. It can detect dust and microbes in ice out to several meters from the borehole, and measure optical properties of those particles. The data set contains information on depth and optical signal.
Data are in generic data file format (.dat).
Data are available on the FTP site in the ftp://sidads.colorado.edu/pub/DATASETS/AGDC/bay_nsidc_0403/ directory. The data set consists of two data files,
Backscatter_SDMA.dat, and a readme file,
The data set is 4750 KB total.
Data were obtained at the Siple Dome A borehole in Antarctica.
Southernmost Latitude: 81° 39.53' S
Northernmost Latitude: 81° 39.53' S
Westernmost Longitude: 148° 48.72' W
Easternmost Longitude: 148° 48.72' W
Data were collected during two Antarctic field seasons, from 2000 to 2001 and 2001 to 2002.
This data set includes raw data from dust logging of the Siple Dome A borehole. Parameters include measurement depth and signal. These data can be used to identify dust and other particles in the ice surrounding the borehole. Data were taken in the Siple Dome A borehole in 2000-01 and 2001-02. The Dust Logger measures the amount of light beamed into the horizon which exits the borehole and returns. Backscatter data from a second instrument with lower resolution are included in the file,
Sample Data Record
Signal (arb units)
Software and Tools
The data set is approximately 4700 KB.
Data are accessible using spreadsheet software.
Data Acquisition and Processing
Data were taken in the Siple Dome A borehole during two Antarctic field seasons in 2000-2001 and 2001-2002. The dust logger is an optical instrument which detects dust particles and air bubbles by shining a light against the borehole walls and recording the fraction of light that scatters back into the borehole. The logger was lowered into an ice core borehole, which was kept open with an insoluble antifreeze matched to the ice density. Detailed description of the instrument is avilable in Bay, et al., 2001.
References and Related Publications
Contacts and Acknowledgments
Dr. Ryan Bay
University of California-Berkeley
Berkeley, CA 94704
This research was supported by NSF OPP grant 0125794.
Document Creation Date
10 July, 2009