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Digital Elevation Model of Elfin Cove Alaska, Integrating Bathymetric and Topographic Datasets

Entry ID: gov.noaa.ngdc.mgg.dem.253

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Summary

Abstract: ABSTRACT: NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program's (NTHMP) efforts to improve community preparedness and hazard mitigation. These integrated bathymetric-topographic DEMs are used to support tsunami and coastal inundation mapping. ...

Purpose: PURPOSE: Developed for the University of Alaska at Fairbanks (UAF), Geophysical Institute for tsunami and coastal inundation modeling efforts for the State of Alaska.

Related URL

Link: GET DATA

Description: Report describing the development of the Elfin Cove DEMs

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 58.67

S: 57.53

E: -135.27

W: -137.97

Data Set Citation

Dataset Originator/Creator: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce

Dataset Title: Digital Elevation Model of Elfin Cove Alaska, Integrating Bathymetric and Topographic Datasets

Dataset Series Name: NOAA Tsunami Inundation DEMs

Dataset Release Date: 2011-03-31

Dataset Release Place: Boulder, Colorado

Dataset Publisher: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce

Version: First

Issue Identification: Elfin Cove MHW

Data Presentation Form: raster digital data

Online Resource: http://www.ngdc.noaa.gov/dem/squareCellGrid/download/253

Temporal Coverage

Start Date: 1883-01-01

Stop Date: 2010-12-31

Location Keywords

OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA

OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

Data Resolution

Latitude Resolution: 0.00009259 Decimal degrees
Longitude Resolution: 0.00009259 Decimal degrees
Vertical Resolution: 0.01 meters
Vertical Resolution Range: < 1 meter

Science Keywords

LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF

LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION

ISO Topic Category

ELEVATION

Platform

DEM > Digital Elevation Model

Instrument

LIDAR > Light Detection and Ranging

SONAR > Sound Navigation and Ranging

MSBS > Multibeam Swath Bathymetry System

Project

IPY > INTERNATIONAL POLAR YEAR

GEOTRACES > Biogeochemical cycles of Trace Elements/Isotopes in the Arctic and S. Oceans

Quality Data Processing:
The system was calibrated using standard additions from a 5000 nM Mn stock solution (Fluka) to filtered acidified seawater of low Mn concentration that was collected in Antarctic Ocean. A five-points calibration line (0, 0.15, 0.36, 0.73 and 1.46 nM standard additions) and blank determination were made daily. The three lowest points (0, 0.15 and 0.36 nM) of the ... calibration line were measured in triplicate and the two highest points (0.73 and 1.46 nM) in duplicate to add more weight to the lower part of the calibration line. The blank was determined by measuring column-cleaned seawater. Latter was obtained by passing seawater over a Toyopearl AFChelate 650M and an 8-hydroxyquinoline column which retained the dissolved Mn. The average blank value was 20 pM. The limit of detection defined as three times the standard deviation of the blank was < 0.01 nM. The flow injection system was rinsed every day with a 0.5 M HCl solution.
A standard was measured in triplicate every day. This standard was a sub-sample of a 25 L volume of filtered seawater that was taken at the beginning of the cruise. This standard was analysed 40 times on different days and the relative standard deviation of the replicate analysis in triplicate was 3.2%. The relative standard deviation on the separate days was on average 1.3 %. The average concentration of Mn of this standard was 0.44 nM and the deviation from this average for a given measuring day was used as a correction factor. To verify whether this correction was decreasing the inter-daily variability in the dataset, every day a sample which was collected and measured the previous measuring day, was analysed once again. The deviation between the concentrations measured on the different days decreased from 3.5% to 2.5%, indicating the data correction procedure is beneficial.
As an independent comparison, the certification samples collected on the SAFe cruise (Johnson et al., 2007) were analysed for Mn. As an independent comparison, the certification samples collected on the American SAFe cruise (Johnson et al., 2007) were analysed in triplicate for Mn. The resulting concentrations of Mn for both SAFe Surface (S) and SAFe deep (D2) from 1000 m, agreed very nicely the community consensus value that is starting to emerge on the absolute concentrations of Mn in the SAFe samples. The dataset was scanned for obvious outliers and these have been quality flagged with the number 4. Some samples gave anomalous nutrient results for the intended depth and were assumed to have been closed at the wrong depth and quality flagged with the number 8. All other values are assumed to be correct and flagged with the number 0.

Access Constraints No constraints

Use Constraints Please contact Rob Middag at NIOZ for citation details.

Ancillary Keywords

GEOTRACES

IPY-NL

Data Set Progress

IN WORK

Originating Center

NIOZ Royal Netherlands Institute for Sea Research

Data Center

Netherlands National Polar Data Centre, Royal Netherlands Institute for Sea Research, Netherlands Organization for Scientific Research, Netherlands

Data Center URL: http://www.nioz.nl/dmg

Data Center Personnel
Name: IRA VAN DEN BROEK Phone: +31 222 369 420 Fax: +31 222 319 674 Email: ira.van.den.broek at nioz.nl Contact Address: P.O. Box 59 City: Den Burg Postal Code: 1790 AB Country: The Netherlands

Data Center Personnel
Name: TACO F. DE BRUIN Phone: +31-222-369 479 Fax: +31-222-319674 Email: bruin at nioz.nl Contact Address: P.O. Box 59 City: Den Burg Postal Code: 1790 AB Country: The Netherlands

Distribution

Distribution Media: internet

Personnel

ROB MIDDAG

Role: INVESTIGATOR

Role: DIF AUTHOR

Role: TECHNICAL CONTACT

Phone: +31222369464

Fax: +31222319674

Email: rob.middag at nioz.nl

Contact Address:

P.O. Box 59

City: Den Burg

Postal Code: 1790 AB

Country: The Netherlands

PATRICK LAAN

Role: TECHNICAL CONTACT

Phone: +31222369464

Fax: +31222319674

Email: Patrick.laan at nioz.nl

Contact Address:

P.O. Box 59

City: Den Burg

Postal Code: 1790 AB

Country: The Netherlands

Publications/References

Related files and references:
De Baar, H.J.W., Timmermans, K.R., Laan, P., de Porto, H.H., Ober, S., Blom, J.J., Bakker, M.C., Schilling, J., Sarthou, G., Smit, M.G., Klunder, M., 2008. Titan: A new facility for ultraclean sampling of trace elements and isotopes in the deep oceans in the international Geotraces program. Marine Chemistry 111 (1-2), 4-21. Description of sampling system.
...

Creation and Review Dates

DIF Creation Date: 2009-07-17

Last DIF Revision Date: 2010-01-22

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