Map showing the age distribution of Arctic sea ice in the month of December for the years 1992, 2001, 2010 and 2019. The ice is shaded according to its age, which ranges from over four years (white) to less than a year (dark grey). Ice that is present for more than a year is known as multi-year ice or perennial ice. It starts off around 2 metres thick, but can reach a thickness of over nine metres. Perennial ice is more resistant to melting than young ice. The decline in perennial ice in the Arctic is an indication of climate change. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Mark Tschudi, Walter Meier, J Stewart / NASA Scientific Visualisation Studio, NSIDC |
Bildgröße: | 5756 px × 3036 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |