Advance Microwave Scanning Radiometer for EOS, an instrument on NASA's Aqua satellite.
Advanced Synthetic Aperture Radar, an in instrument on ESA's Envisat satellite.
ASAR Wide Swath mode, with a swath width of 405 km and a pixel size of 150 metres.
Climate and Cryosphere Project, a core project of the World Climate Research Programme.
A ridge of sea ice built up as plates of ice are pushed towards each other and pile up.
Centre for Polar Observation and Monitoring, a UK research centre funded by the Natural Environment Research Council.
A measure of the similarity between the patterns of brightness in two images.
A satellite operated by the European Space Agency since 2010 carrying instruments designed for observing the cryosphere.
In fluid dynamics, a measure of a vector field's source or sink at a given point.
The depth of the underside of an ice floe below the level of the sea surface.
Data User Element, part of ESA's Earth Observation Envelope Programme.
A satellite operated by the European Space Agency since 2002.
Earth Remote Sensing Satellite, a series of two satellites operated by the European Space Agency from 1991-2011.
European Space Agency.
In fluid dynamics, refers to measurements of fluid motion on an equally-spaced grid. Named after the Swiss mathematician and physicist, Leonhard Euler.
The height of the surface of an ice floe above the level of the sea surface.
Global Monitoring for the Environment and Security, a joint programme of the European Union and the European Space Agency.
International Arctic Buoy Program, a project to track drift bouys across the Arcitc Ocean.
Institut Francaise de Research pour l'Expoitation de la Mer.
Jet Propulsion Laboratory, a NASA laboratory based at the California Institute of Technology.
Kongsberg Spacetec, Norway.
A long, thin area of open water within an area of sea ice.
In fluid dynamics, refers to the motion of an individual parcel of fluid through time. Named after the French mathematician, Joseph-Louis Lagrange.
Mullard Space Science Laboratory, University College London.
National Aeronautical and Space Administration, the US government's space agency.
The data format used by the GlobICE products.
National Snow and Ice Data Center, Boulder, Colorado.
Radar Altimeter, a device for precisely measuring the distance from a satellite to the Earth's surface.
A series of two satellites operated by the Canadian Space Agency.
Radarsat Geophysical Processor System, a software system developed at NASA's Jet Propulsion Laboratory.
Synthetic Aperture Radar, an instrument on ESA's ERS satellites.
Sea ice Experiment - Dynamic Nature of the Arctic, an international project to deploy and track drift buoys in the Beaufort Sea.
An ESA satellite due to be launched in 2013.
In fluid dynamics, the change of angle between two initially perpendicular lines per unit time.
Special Sensor Microwave/Imager, an instrument on the US Air Force DMSP satellites.
The width of a satellite image, usually measured as a distance on the ground in a direction perpendicular to the satellite's track over the ground.
The deep vertical circulation in the world's oceans, driven by the cold, salty water left behind when sea ice freezes in the polar regions. The higher salt concentration makes the water more dense, so it sinks to the ocean floor, where it circulates through the ocean basins. Eventually this "bottom water" returns to the surface at lower latitudes, and is carried back to the poles by the oceans' surface currents.
University College London, UK.
The Met Office, UK.
University of Alberta, Canada.
In fluid dynamics, a measure of the angular velocity at a given point.