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Supplementary Materials and Links

Note on previous study of the same name:

This project is the continuation and extension of an earlier project with the same title (AK-03-06, MMS-71707, active from 2004-2006), supported by the Minerals Management Service (MMS). This earlier project (which we refer to now as MMS-1) was confined to the Beaufort and eastern Chukchi Sea and the time period 1993-2004. The current project extends the study area to cover the entire Chukchi Sea and covers the years 1993-2008. The results of the current project supercede those of MMS-1, but the reader is directed to the final report and other publications for MMS-1 for more details.

Study Area:

The Figure below shows the study regions for the operational leads and landfast ice components of this study.
Study region map
To provide consistency with the results from MMS-1, we retained the study regions from the previous study and established additional regions to the West. The study regions used in MMS-1 are referred to as the eastern regions and those added for the extended study are referred to as the western regions. For the landfast ice component of the project, the western study region is contiguous with the eastern region, but the SAR imagery were acquired separately and do not coincide in time. The data from the two study regions should therefore be treated separately except when they are synchronized in time, for example through the calculation of monthly or seasonal means. For the leads component of the project, there is an area of overlap between the eastern and western study regions. This minimized the repetition of work from MMS-1 and allowed each study region to provide complete coverage of either the Chukchi or Beaufort Sea.

Supplemental Documentation:

File naming conventions: Word Format | PDF format
Standard Map Projections: Word Format | PDF Format
Data Catalogs: SAR scenes | AVHRR scenes

Metadata Templates for use in ArcCatalog


Leads-related
metadata
Western region
(Chukchi Sea)
Eastern region
(Beaufort Sea)
AVHRR imagery this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML
Gridded leads data this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML
Vector leads data this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML


Landfast ice
related metadata
Western region
(Chukchi Sea)
Eastern region
(Beaufort Sea)
SAR imagery this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML
Gridded SLIE data this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML
Vector SLIE data this study: HTML | XML this study: HTML | XML
MMS-1: HTML | XML


Supplemental Data:

Bathymetry:
Alaska Region Bathymetric Digital Elevation Model (Available here)
Depth Sounding Points | metadata
100 m offshore Digital Elevation Model ArcGIS Grid | TIF | metadata
1 kilometer offshore Digital Elevation Model ArcGIS Grid | TIF | metadata

Other Regional Bathymetry available through USGS
http://www.absc.usgs.gov/research/walrus/bering/bathy/

Preliminary DEMs derived from kriging routines at Alaska Pacific University (no metadata)
Offshore Digital Elevation Model 1 (from APU)
Offshore Digital Elevation Model 2 (from APU)

Lead Statistics:
Lead Fractions - Excel Format - metadata
Overall Stats - Excel Format - metadata
Subregions eliminated from statistical analysis - Excel Format | PDF Format

Relevant Links:

MMS Environmental Studies Program Information System (ESPIS)
gomr.mms.gov/homepg/espis/espisfront.asp (all MMS Environmental Stud ies Reports available as
pdf files)

UAF-GI Sea Ice Monitoring Station, Barrow, AK
www.gi.al aska.edu/BRWICE/ (web cam images,
marine radar and satellite imagery in near-real time showing ice
conditions off Barrow, AK)