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OAS accession Detail for 0112864, meta_version: 5. Current meta_version is: 5
| << previous | |revision: 5 |
| accessions_id: | 0112864 | archive |
|---|---|
| Title: | Ice optical properties: transmittance and albedo from ARSV Laurence M. Gould LMG0106, LMG0205 in the Southern Ocean from 2001-2002 (SOGLOBEC project) (NCEI Accession 0112864) |
| Abstract: | This dataset contains meteorological, optical, and physical data collected on ARSV Laurence M. Gould during cruises LMG0106 and LMG0205 in the South Pacific Ocean and Southern Ocean from 2001-08-07 to 2002-09-08. These data include ice_thickness, snow_thickness, and wavelength. These data were collected by Dr Don Perovich of Cold Regions Research and Engineering Laboratory, Dr Doug Martinson of Lamont-Doherty Earth Observatory, and Dr Raymond Smith of University of California-Santa Barbara as part of the "U.S. GLOBEC Southern Ocean (SOGLOBEC)" project and "U.S. GLOBal ocean ECosystems dynamics (U.S. GLOBEC)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-01-22. The following is the text of the dataset description provided by BCO-DMO: Ice optical properties: transmittance and albedo Dataset Description: Project #:OG-241-0: Optical Environment of the Western Antarctic Peninsula Region An Analytical Spectral Devices Ice-1 spectroradiometer was used to measure albedos and transmittances. This instrument has an effective spectral range from 380 nm to 860 nm. It is a dual channel instrument with separate detectors to simultaneous measure incident and transmitted irradiance. Fiber optics probes are used to transmit the from the cosine collectors to two highly sensitive CCD detector arrays. Limited daylight and harsh weather constrained the number of optical measurements. In 2001, optical measurements were made on 7 August, 8 August, 11 August, and 18 August. In 2002, optical measurements were made on 25 August, 26 August, 7 September, and 8 September. In 2002 vertical profiles of upwelling irradiance were made at several sites. (from the data cdrom) Related datasets: ice thickness , snow pits , sea ice , ice properties |
| Date received: | 20200122 |
| Start date: | 20010807 |
| End date: | 20020908 |
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| West boundary: | -71.517 |
| East boundary: | -68.485 |
| North boundary: | -65.523 |
| South boundary: | -68 |
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| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
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| Supplementary information: | Acquisition Description: From 2001 cruise report: The optics of the different sea ice types found in the region. When weather and day light permitted, snow and ice albedo and transmission measurements were taken. At only one site was the surface frozen where we could measure the combined snow and ice albedo and transmission and then shovel the area and re-measuring to subtract out the snow component. This will allow us to sort out what component the snow and ice have individually in the transmission of light into the ice and water column for the organisms to grow. Our measurements were hampered due to blowing snow which we experienced nearly every day and the fact that we needed to be stopped near solar noon as the sun angle is low this time of year, so only a limited number of optics measurements were performed. From 2002 cruise report: We also measured the optics of the sea ice using a scanning spectral radiometer. This instrument measures the light levels in 0.5 nanometer increments from 380 to 800 nanometers (visible light through the near infrared). With this instrument we made optical measurements on seven different ice floes. We performed these measurements through the undisturbed snow and ice, and would then shovel off the area to obtain measurements of just the sea ice with no snow cover. We first measured snow and bare ice albedo, then upwelling irradiance at 1 cm increments as we lowered the sensor down through the snow cover. We then would drill a hole in the ice and measure upwelling irradiance at 2 cm to 5 cm increment down through the ice sheet both before and after removing the snow cover. Additionally, the transmission of light through both snow covered sea ice and bare ice was measured. In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. |
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| Metadata version: | 5 |
| Keydate: | 2013-09-11 13:45:06+00 |
| Editdate: | 2023-05-04 04:24:23+00 |