Hallé, Danielle; Karlsson, Nanna B; Solgaard, Anne M; Andresen, Camilla S (2018): Probability of Sea Ice Extent: Between Eastern Greenland and Iceland 1821-1956. PANGAEA, https://doi.org/10.1594/PANGAEA.887452
Always quote above citation when using data! You can download the citation in several formats below.
Our data set includes nine probability maps of sea ice extent, available in .jpeg and shapfiles. They were created from historical maps of sea ice extent off Iceland dating back to 1877 compiled by Koch (1945) that we digitized. We use these maps in combination with sea ice charts from the Danish Meteorological Institute (DMI) and Koch's sea ice index from 1820 to 1939 to provide spatial maps of estimated sea ice extent between Iceland and Greenland back to 1821.
The probability maps should be used in combination with the table: Summary of Koch's Index Years, in order to know which years fall under which category.
Hallé, Danielle; Karlsson, Nanna B; Solgaard, Anne M; Andresen, Camilla S (2018): Observationally constrained reconstruction of 19th to mid-20th century sea-ice extent off eastern Greenland. Geological Survey of Denmark and Greenland Bulletin, 41, 83-86, http://www.eng.geus.dk/media/19209/nr41_p83-86.pdf
Underhill, Vivian; Fetterer, Florence; Petersen, Corey (2014): Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956, Version 1. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center, https://doi.org/10.7265/N5MP517M (Access date: 2017-09-09)
Latitude: 67.500000 * Longitude: -24.500000
10 data points