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Arctic Data Support Files

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Arctic Data Support Files

The data support files presented are based off U.S. National Ice Center (USNIC) Arctic daily or weekly ice analysis. Support products are offered as GIS files with shapefiles and KMZs, and various text files.

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Arctic
Ice Charts

Data Files

Periodic

Trend Graph

Trivariate

Synopsis

Antarctic
Ice Charts

Data Files

Icebergs

Trend Graph

Trivariate

Synopsis

Great Lakes
Ice Charts

Data Files

Trend Graph

Outlooks

Mid-Atlantic
Ice Charts

Data Files

Outlooks

IMS Snow and Ice
Ice Charts

Data Files

Trend Graph

Trend Graph

Periodic

Arctic Antarctic Great Lakes Mid-Atlantic IMS Snow/Ice

Ice Charts Data Files Periodic Trend Graph Trivariate Synopsis

Ice Charts Data Files Icebergs Trend Graph Trivariate Synopsis

Ice Charts Data Files Trend Graph Outlooks

Ice Chart Data Files Outlooks

Snow and Ice Charts Data Files Snow Trend Graph Ice Trend Graph Periodic

Area

Description

Display / Format

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Daily Arctic Shapefile

Three GIS shapefiles are created off the USNIC daily Arctic ice analysis.

MIZ - a vector analysis separating ice areas into 1 to 8 tenths and 8 to 10 tenths ice concentrations.

Overlay - vector analysis separating ice and no ice.

SPAROS - vector analysis representing ice edge, 100% boundary, and 48hr forecast lines.

Download
MIZ Shapefile Overlay Shapefile Sparos Shapefile

Archive

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Daily KMZ Files

Two KMZ files are created with attributes defined by ice concentration.

Colorfill KMZ - contains color-defined ice areas for the marginal ice zone (concentration up to 80%) in yellow and pack ice (ice concentration 80% and greater) in red

Vector KMZ - contains color-defined ice lines for the ice edge in yellow and the marginal ice zone (concentration up to 80%) and pack ice boundary (ice concentration 80% and greater) in red.

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Colorfill Vector

Archive

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Weekly Arctic Shapefile

A GIS shapefile is created off the USNIC weekly Arctic ice analysis. A more thorough ice analysis than the daily ice analysis that separates ice areas to include total ice concentration, ice types with their respective concentrations and ice forms where applicable.

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Weekly Shapefile

Archive

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Weekly Arctic KMZ

The Arctic KMZ file is created off the USNIC Weekly Arctic ice analysis. The files contain SIGRID-3 information on ice conditions that are separated into total ice concentration, ice types with their respective concentrations, and ice floe size.

Weekly KMZ

Archive

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Daily Text Files

Text files are based off the USNIC daily Arctic ice analysis. Files created are in latitude / longitude pairs for portability and can be parsed into various platforms and programs. The following are a detail of file contents and format:

ASCII Format - general text format that outlines the ice edge to the nearest 1/10th of a degree.
North ASCII - outlines the ice edge

Rainform OTH Format - text format with a DoD defined header
MIZ - outlines ice edge and marginal ice zone (concentration up to 80%) boundaries within the Arctic.

Ice Extent - outlines ice edge boundary

SPAROSPAC1 - outlines the ice edge within the North Pacific Ocean

SPAROSPAC2 - outlines the pack ice boundary (concentration at 80% or greater) within the North Pacific Ocean

SPAROSPAC3 - outlines the 48-hour forecast ice edge within the North Pacific Ocean

SPAROSLANT1 - outlines the ice edge within the North Atlantic Ocean

SPAROSLANT2 - outlines the pack ice boundary (concentration at 80% or greater) within the North Atlantic Ocean

SPAROSLANT3 - outlines the 48-hour forecast ice edge within the North Atlantic Ocean

Download
North ASCIIMIZ TextIce Extent OverlaySPAROS Lant 1SPAROS Lant 2SPAROS Lant 3SPAROS Pac 1SPAROS Pac 2SPAROS Pac 3

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