Where can I find the sea ice index?
The Sea Ice Index provides a quick look at Arctic- and Antarctic-wide changes in sea ice. It is a source for consistent, up-to-date sea ice extent and concentration images, in PNG format, and data values, in GeoTIFF and ASCII text files, from November 1978 to the present.
What was the Arctic sea ice extent in September 2019?
Arctic sea ice extent for September 2019 was 4.32 million square kilometers (1.67 million square miles). The magenta line shows the 1981 to 2010 average extent for that month. Sea Ice Index data. About the data Credit: National Snow and Ice Data Center High-resolution image Figure 1b.
How many data series are there for Arctic sea ice?
Combination chart with 52 data series. The chart has 1 X axis displaying Date. Range: 1 to 369.65. The chart has 1 Y axis displaying Extent (Millions of square kilometers). Range: 0 to 18.
How can I download data from the National Snow and Ice Data Center?
FTP data can be downloaded through a Web browser (Firefox or Edge are recommended) or command line via FTP. For help downloading data through an FTP client, go to the How to access data using an FTP client support page. As a condition of using these data, you must cite the use of this data set using the following citation.
The data files are in comma delimited ASCII text format (.csv). These data are not part of the Sea Ice Index archive. They are the input data that the Sea Ice Index is derived from. To access these data and learn more about them, see the following links:
Is the USGS GIS data available for download?
Maps and GIS Data are available for digital download. The Topographic Maps and geographical information system (GIS) data provided in The National Map are pre-generated into downloadable products often available in multiple formats.
How does the ASCII sea ice index work?
The ASCII data files tabulate extent and area (in millions of square kilometers) by year for a given month. Go to either the North or South FTP monthly data directory. Where H stands for the hemisphere: N (north) or S (south), and mm is the 2-digit month.
What is the National Snow and Ice Data Center?
The National Snow and Ice Data Center (NSIDC) is developing a repository of geographic information systems (GIS)-compatible snow, ice, and frozen ground data for research and planning.