On Monday, 11 July from 3:00 p.m. through Wednesday, 13 July until 5:00 p.m. (USA Mountain Time), NSIDC data distribution, services, and Web site will be unavailable to accommodate a major upgrade to our data center. We apologize for any inconvenience this may cause you. Need to talk to us? You can always contact our friendly User Services Office at email@example.com or + 1 303.492.6199.
This data set contains observations of albedo, depth, and physical characteristics of melt ponds on sea ice, taken during the summer of 1994. The melt ponds studied were located just south of Cornwallis Island in the Barrow Strait, Nunavat, Canada. The reflectance spectra were acquired with a portable spectrometer. Cloud conditions and ice type were recorded as well.
Access to the Sea Ice Melt Pond Data from the Canadian Arctic data set is unrestricted, but users are encouraged to register for the data. Registered users will receive e-mail notification about any product changes.
Morassutti, M. 1995. Sea ice melt pond data from the Canadian Arctic. Boulder, Colorado USA: National Snow and Ice Data Center. http://dx.doi.org/10.7265/N55Q4T1C
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.
|Spatial coverage and resolution||The melt ponds studied were located just south of Cornwallis Island in the Barrow Strait in the Canadian Arctic.|
|Temporal coverage and resolution||1994 ice season|
|File size||The data file is 67.4 KB.|
|Parameter(s)||Albedo, depth, and physical characteristics of melt ponds|
|Metadata access||View metadata|
|Data access||Data are available via FTP.|
Earth Observations Laboratory,
Institute for Space and Terrestrial Science,
and the Department of Geography
University of Waterloo
Waterloo, Ontario, N2L 3G1
NSIDC User Services
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder, CO 80309-0449 USA
phone: +1 303.492.6199
fax: +1 303.492.2468
form: Contact NSIDC User Services
This data set of melt pond observations from Barrow Strait, Nunavut, Canada, was provided to NSIDC by Mike Morassutti. The extensive measurements were acquired for use in climate studies and sea ice modeling. The reflectance spectra were acquired using a portable spectrometer. All data processing and quality control were completed at the Institute for Space and Terrestrial Science. The data are also in a report by Morassutti and LeDrew (1995). Please see this publication for more information.
The data are stored in an ASCII file containing 22 columns. See sample data below.
|Table 1. Column definitions of the ASCII data set|
|2||2 Time of measurement (local time)||0001-2400||I4|
|3||Field of view||see table 2||A3|
|4||Predominant observable cloud type||see table 3||A3|
|5||Degree of obscuration of solar disc||see table 4||I1|
|6||Ice type||see table 5||I1|
|7||Pond depth (m)||F5.3|
|8||Pond bottom texture||0=smooth,1=rough||I1|
|9||Indicates presence of ice layer||0=no,1=yes||I1|
|10||Indicates presence of debris in pond||0=no,1=yes||I1|
|11||Pond color||see table 6||I2|
|12||Broadband albedo (400-1000 nm)||F5.3|
|13||Visible albedo (400-700 nm)||F5.3|
|14||Near-infrared albedo (700-1000 nm)||F5.3|
|15||Band 1 albedo (blue, 400-500 nm)||F5.3|
|16||Band 2 albedo (green, 500-600 nm)||F5.3|
|17||Band 3 albedo (red, 600-700 nm)||F5.3|
|18||Band 4 albedo (near IR, 700-800 nm)||F5.3|
|19||Band 5 albedo (near IR, 800-900 nm)||F5.3|
|20||Band 6 albedo (near IR, 900-1000 nm)||F5.3|
|21||Thickness of ice layer (cm)||F3.1|
|Table 2. Coding scheme used for instrument field of view|
|Table 3. Coding scheme used for predominant cloud type|
|Table 4. Coding scheme used for degree of obscuration of sun|
|1||Full solar disc is visible|
|2||Bright sun with some obscuration (resulting from the presence of thin cirrus)|
|3||Noticeable reduction in solar disc brightness|
|4||Solar disc is faintly observable|
|5||Solar disc is totally occluded|
|Table 5. Coding scheme used for the ice type|
|Table 6. Coding scheme used for pond color|
The color codes specified were selected to match as closely as possible the color gradations occurring in the visible spectrum.
See Table 1 (above) for definitions of each column in the data, below.
147 1310 CR SC 5 3 0.090 1 0 1 7 0.402 0.619 0.184 0.702 0.682 0.519 0.256 0.198 0.140 0.0 01 147 1340 CR SC 5 3 0.002 1 0 1 6 0.508 0.640 0.377 0.694 0.674 0.607 0.489 0.375 0.261 0.0 02 148 1931 CR SC 5 1 0.025 1 0 0 4 0.483 0.673 0.292 0.733 0.712 0.633 0.437 0.296 0.154 0.0 03 148 1943 CR SC 5 1 0.030 1 0 0 4 0.423 0.593 0.253 0.649 0.630 0.551 0.373 0.260 0.146 0.0 04 148 2004 CR SC 5 1 0.040 1 0 0 4 0.431 0.556 0.305 0.613 0.595 0.522 0.380 0.314 0.248 0.0 05
The data file is 67.4 KB.
Data are available via FTP.
M.P. Morassutti and E.F. LeDrew. 1995. Melt Pond Dataset for use in Sea-Ice and Climate Related Studies. Institute for Space and Terrestrial Science, Ontario, Canada, ISTS-EOL-TR95-001.
This data set is maintained at NSIDC with support from the NOAA National Geophysical Data Center (NGDC).
17 April 1996
January 2010, A. Windnagel added an NSIDC related data collection to that section.
July 2006, this document was reformatted. F. Fetterer reviewed this document.