AGSL GeoDiscovery

Arctic Ice Chart, April 25, 1970

Description:

This polygon shapefile contains ice observations in the Arctic region for April 25, 1970. This layer is part of the Arctic Climate System (ACSYS) Historical Ice Chart Archive. The earliest chart in the data set comes from 1553, when Sir Hugh Willoughby and Richard Chancellor, commanders of two expeditions sent out by the Company of Merchant Adventurers, recorded their observations of the ice edge. Early charts are irregular and infrequent, reflecting the remoteness and hostility of the region. The frequency of observations generally increases over time, as the economic and strategic importance of the Arctic grew, along with the ability to access, observe and record information on sea ice. The Norwegian Meteorological Institute in Tromsø used a combination of satellite imagery and in situ observations to produce daily digital charts each working day. These show not only the ice edge, but also detailed information on the range of sea ice concentrations and ice types. The Norwegian Meteorological Institute is continuing this series, and more recent charts may be obtained from this source. The ACSYS Historical Ice Chart Archive presents historical sea-ice observations in the Arctic region between 30ºW and 70ºE. The earliest chart dates from 1553, and the most recent from December 2002.

Resource Link:

https://purl.stanford.edu/rr948hx3830

Identifier:

https://purl.stanford.edu/rr948hx3830

Language:

eng

Publisher:

Arctic Climate System (ACSYS)

Provider:

Stanford

Resource Class:

Datasets

Resource Type:

Polygon data

Subject:

Sea ice, Climatology, Meteorology and Atmosphere, and Oceans

Theme:

Climate and Oceans

Temporal Coverage:

1970

Date Issued:

2003

Spatial Coverage:

Arctic Ocean

Rights:

If you use this data, please refer to it using this citation:
ACSYS, 2003. ACSYS Historical Ice Chart Archive (1553-2002). IACPO Informal Report No. 8. Tromsø, Norway: Arctic Climate System Study.

License:

https://creativecommons.org/licenses/by/3.0/legalcode

Access Rights:

Public

Format:

Shapefile

Georeferenced:

false