AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids, Version 4
Data set id:
AE_SI12
DOI: 10.5067/J00N1DZZHGW9
This is the most recent version of these data.
Version Summary
Version Summary
Changes for this version include:
* Uses Version 4 of the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures as input;
* NH water filter parameters adjusted to better characterize open water cluster during cold months. This change eliminates ~60% of NH false ice identifications in open ocean during Oct. to May.
* Removed sea ice concentration difference flagging scheme, which in previous versions indicated explicitly whether BBA and/or NT2 values were missing.
* Data file format changed to HDF-EOS5.
* Uses Version 4 of the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures as input;
* NH water filter parameters adjusted to better characterize open water cluster during cold months. This change eliminates ~60% of NH false ice identifications in open ocean during Oct. to May.
* Removed sea ice concentration difference flagging scheme, which in previous versions indicated explicitly whether BBA and/or NT2 values were missing.
* Data file format changed to HDF-EOS5.
Overview
This data set (AE_SI12) reports average daily, 12.5 km resolution, horizontally and vertically polarized brightness temperatures (Tb) at four frequencies—18.7 GHz, 23.8 GHz, 36.5 GHz and 89.0 GHz. It also reports: daily sea ice concentrations derived with the Enhanced NASA Team (NT2) algorithm; daily sea ice concentration differences between NT2 and the legacy AMSR Basic Bootstrap Algorithm (BBA); and daily snow depths over sea ice. Data are provided on Northern and Southern Hemisphere, polar stereographic grids.
These data are derived from observations acquired by the Advanced Microwave Scanning Radiometer for EOS (AMSR-E).
Parameter(s):
BRIGHTNESS TEMPERATURE
SEA ICE CONCENTRATION
SNOW DEPTH
Platform(s):
Aqua
Sensor(s):
AMSR-E
Data Format(s):
HDF-EOS5
Temporal Coverage:
- 1 June 2002 to 4 October 2011
Temporal Resolution:
- 1 day
- 5 day
Spatial Resolution:
- 12.5 km
- 12.5 km
Spatial Reference System(s):
- NSIDC Sea Ice Polar Stereographic NorthEPSG:3411
- NSIDC Sea Ice Polar Stereographic SouthEPSG:3412
Spatial Coverage:
- N:90S:30.98E:180W:-180
- N:-39.23S:-90E:180W:-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
Data Access & Tools
A free NASA Earthdata Login account is required to access these data. Learn More
Documentation
Help Articles
General Questions & FAQs
This article covers frequently asked questions about the NASA NSIDC DAAC's Earthdata cloud migration project and what it means to data users.
This article describes what customizing services are available for AMSR-E data using Earthdata Search.
The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is migrating its primary data access from its legacy, on-premises archive to the NASA Earthdata Cloud.
How to Articles
Many NSIDC DAAC data sets can be accessed using NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.Users have the option to:
To convert HDF5 files into binary format you will need to use the h5dump utility, which is part of the HDF5 distribution available from the HDF Group. How you install HDF5 depends on your operating system.
AMSR-E sea ice data sets are provided in the Polar Stereographic projection.
The NASA Earthdata Cloud is the NASA cloud-based archive of Earth observations. It is hosted by Amazon Web Services (AWS). Learn how to find and access NSIDC DAAC data directly in the cloud.
All data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is directly accessible through our HTTPS file system using Wget or curl. This article provides basic command line instructions for accessing data using this method.
This article highlights the NSIDC DAAC data sets available with customization options and outlines a workflow for searching, ordering, and customizing data in NASA Earthdata Search. This approach is ideal for users who want to download data to their local machine.
NASA Worldview is a map interface that allows users to interactively browse imagery, create visualizations, and download the underlying data.
NASA's Global Imagery Browse Services (GIBS) provides up to date, full resolution imagery for selected NSIDC DAAC data sets.