To fill the gap until someone more knowledgeable pops along, I am not an icelandic speaker, but dug around a bit more, and may have the following translations, and a guess as to what these mean: 1. Haf = Sea, Is = Ice, Jadar = Icelandic Place ==> So may refer to actual known Sea Ice for Jadar region 2. Aaetladur = Approximate ==> So may refer to approximate extent of Jadar Sea Ice 3. Hitaskil = Warm Front ==> So may refer to warm water currents?