Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4
Data set id:
G10016
DOI: 10.7265/tm2n-1m33
This is the most recent version of these data.
Version Summary
Version Summary
* Added AMSR2 as the input brightness temperature source beginning 1 January 2025.
* Removed the AMSR2 prototype sea ice concentration (prototype_am2 group) that was included in CDR Version 5.
* Fixed a bug that allowed sea ice concentration values less than 10% to be considered during land spillover corrections.
* Updated Python code to use current versions of core libraries, including NumPy and Xarray.
* Removed the AMSR2 prototype sea ice concentration (prototype_am2 group) that was included in CDR Version 5.
* Fixed a bug that allowed sea ice concentration values less than 10% to be considered during land spillover corrections.
* Updated Python code to use current versions of core libraries, including NumPy and Xarray.
Overview
This data set provides a near-real-time Climate Data Record (CDR) of sea ice concentration from passive microwave data. The Near-real-time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration (NRT CDR) data set is the near-real-time version of the final NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration (G02202). The NRT CDR is designed to fill the temporal gap between updates of the final CDR to provide the most recent data. It provides the most recent 3 months of data.
Parameter(s):
SEA ICE CONCENTRATION
Platform(s):
DMSP 5D-3/F17
GCOM-W1
Sensor(s):
AMSR2
SSMIS
Data Format(s):
NetCDF
Temporal Coverage:
Not Specified
Temporal Resolution:
- 1 day
Spatial Resolution:
- 25 km
- 25 km
Spatial Reference System(s):
- NSIDC Sea Ice Polar Stereographic NorthEPSG:3411
- NSIDC Sea Ice Polar Stereographic SouthEPSG:3412
Spatial Coverage:
- N:90S:30.1E:180W:-180
- N:-39.2S:-90E:180W:-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
Data Access & Tools
Documentation
User Guide
ATBDs
NSIDC Special Reports
Help Articles
General Questions & FAQs
NSIDC currently archives passive microwave sea ice concentration products based on two algorithms: the NASA Team algorithm and the Bootstrap algorithm. Both algorithms were developed by researchers at the NASA Goddard Space Flight Center in the 1980s.
How to Articles
NOAA@NSIDC data recently transitioned to HTTPS. The directory structure has NOT changed, but the beginning of the URL has changed from:ftp://sidads.colorado.edu/pub/DATASETS/to:
Currently three NOAA@NSIDC data sets are available in NOAA's PolarWatch Data Catalog. Please note that in the catalog the Climate Data Record (CDR) data sets are split up into Antarctic and Arctic data sets: