Ken Dunton, Marine Science Institute, The University of Texas at Austin, Professor, 20130227, Pacific Arctic Stable Isotope Synthesis: Earth Observing Laboratory.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
The map projection used is North Pole Stereographic.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000000006783107409091829
Ordinates (y-coordinates) are specified to the nearest 0.000000006783107409091829
Planar coordinates are specified in meter
The horizontal datum used is D WGS 1984.
The ellipsoid used is WGS 1984.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257223563.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
This dataset was compiled from a variety of sources by Ken Dunton, Marine Science Institute, The University of Texas at Austin. Data were loaded into a GIS feature class by Tim Whiteaker, Center for Research in Water Resources, The University of Texas at Austin.
To synthesize carbon and nitrogen stable isotope data from several studies into a single dataset, with a focus on data in the Pacific-influenced coastal shelf ecosystem of the Arctic Ocean.
Accuracy data is not available for this dataset.
Station locations generally appear accurrate when overlain onto regional scale maps.
Points from the following CruiseIDs initially plotted far inland, suggesting coordinates are off. The locations were moved as described below. The original latitude and longitude values were not changed in the attribute table, thereby preserving a record of the original coordinates as supplied by the data source.
CruiseID Golikov Russia 1989 ''''''''''''''''''''''''''''
Sites: Amguyema River Kolyachinskaya Bay - inside Kolyachinskaya Bay - outside
Note: Golikov's Wrangel Island locations seem correct
These sites were moved per instructions from Susan Schonberg as follows, using ETOPO1 to provide depths: The inside Kolyachinskaya Bay is in the center of the bay near the coast. Adding a negative sign to the longitude places the point in that location, so the new coordinates are (-174.167, 66.9). The outside Kolyachinskaya Bay is located off the western coast in 30 m depth. Like the previous point, adding a negative sign to the longitude places the point in the rightlocation, (-174.5, 67.767). The Amguyema River is located against the river at 50 m depth. Negative sign was missing again. Correct coordinates (-177.5, 68.6)
Cruise ID NP 1994 '''''''''''''''''
Site: NP94 (168.83, 67.75)
There is only one other NP94 site in the dataset. It has the same longitude as the suspect site, but different latitude. Assume the latitude in the suspect site is wrong, and use the same latitude as the other NP94 site, 73.5. Cruise ID RV Thompson 1988 ''''''''''''''''''''''''''
Site: R/V THOMAS WASHINGTON - TW88 (163.12, 67.03)
The other sites in this cruise are located in the Bering Strait. Longitude of this site of 163.12 is also -196.88 (the originally reported longitude). Assuming a typo, a longitude of -169.88 places this site between the two sites with the most similar latitude. With nothing else to help locate this site, assuming there was a typo and correcting the longitude to be -169.88 seems reasonable.
Vertical accuracy is not available for depths reported in this dataset.
Data in the original source datasets east of -120 degrees longitude or south of 60 degrees north latitude were excluded from this dataset. Sites on land or in inland waters were also excluded.
Some data points from collectors Golikov and Haubenstauk included coordinates placing those points in what appeared to be incorrect locations (far inland in Russia). These points were excluded from the dataset.
This synthesis dataset relies heavily on quality control performed by original data collectors. However, all stable isotope ratio values do fall within a reasonable range of values.
Are there legal restrictions on access or use of the data?
- Station locations are publicly available. Stable isotope values are restricted for use within the PacMARS research team. Data will be made available to the public after the first year of the PacMARS project.
The publisher, originator, original data collectors, and others associated with this work assume no liability for the quality and use of this dataset.
- PacMARS team members should be contacted before use of their data sets. PacMARS investigators and others are responsible for providing appropriate recognition to data providers in publications. This can include article co-authorship and/or reference to data publications. Citations, and DOIs when available, will be provided for datasets within the EOL data archive.
PacMARS team members should be contacted before use of their data sets. PacMARS investigators and others are responsible for providing appropriate recognition to data providers in publications. This can include article co-authorship and/or reference to data publications. Citations, and DOIs when available, will be provided for datasets within the EOL data archive.
Data can be obtained from EOL, <http://www.eol.ucar.edu/>.