IMS Daily Northern Hemisphere Snow and Ice Analysis

Summary

This dataset offers daily snow and ice coverage data for the Arctic with a 4-km resolution, available starting from 2004. Data with a 1-km resolution can be accessed for the period from 2014 to the present, while 24-km resolution data extend back to 1997. For access to 1-km and 24-km resolution data, please contact us.
The dataset classifies coverage into five categories: 0 for areas outside the coverage zone, 1 for open water, 2 for land without snow, 3 for sea ice or lake ice, and 4 for snow-covered land.

Time Period

Feb 2004 to Jul 2024

Spatial Coverage

Arctic

Spatial Resolution

4000.0 m

Projection

Polar stereographic

Composites

4-km

Data Provider

USNIC

Parameters

IMS Surface Values

Map Settings

Data Access

ERDDAP

ERDDAP is a data server that gives you a simple, consistent way to download data in the format and the spatial and temporal coverage that you want. Use the following links to access the data in ERDDAP.

Dataset Name	ERDDAP ID
IMS Snow and Ice Analysis, Arctic, 4km, 2004 - Present, Daily	usnic_ims_4km

These Data are in Projected Coordinates

This dataset is provided by USNIC in a Polar Stereographic projection. Check out these tips on accessing projected data from our servers.

Working with Lat-Lon Grids

View an R code example of how to access projected data from ERDDAP using the latitude-longitude grids. View Example

NetCDF File Users

For CF compliant projected files, use a link from the ERDDAP dataset list and then choose 'files' access instead of the ERDDAP download form.

Data Access Examples

View demonstrations of working with the ERDDAP interface and working with R scripts and the ERDDAP API
https://polarwatch.noaa.gov/tools-training/code-gallery

Full Details

The following details are from the dataset metadata. View dataset details in ERDDAP

ERDDAP Dataset Title

IMS Snow and Ice Analysis, Arctic, 4km, 2004 - Present, Daily

ERDDAP Dataset ID

usnic_ims_4km

Data Provider

USNIC

More information about this product

https://nsidc.org/data/G02156

Data Provider Web Page

https://usicecenter.gov/

Dataset Description

This file contains a map of snow cover and ice cover for the Northern Hemisphere produced by the Interactive Multisensor Snow and Ice Mapping System (IMS). The map is nowcasted to be valid at the moment specified by the time variable. The input data used to generate the map originates between the time_coverage_start and time_coverage_end global attributes. Analysts at the United States National Ice Center (USNIC) use a variety of geostationary and polar orbiting satellite imagery, derived products, in situ, and other data sources to interactively create the map. The system has produced daily analyses from February 1997 to Dec 2014, and twice daily analyses since.

Time Period

Feb 25, 2004 to Jul 26, 2024

Spatial Coverage

Arctic

Parameters

IMS Surface Values

Composites

4-km

Data Formats

Data are available in a number of formats including NetCDF, csv, graphics and more.

Metadata

View in ERDDAP

Projection

Polar Stereographic, usnic_ims_nh