Iceland low The region of the N. Atlantic in which the average value of atmospheric pressure is low, owing to the frequency of low-pressure systems (cyclones or ‘depressions’) moving into and occupying the region. Any one of these systems, when present on an individual day, may be called ‘an Iceland low’, but the term is used mostly to describe the statistical or climatic feature.

Iceland low A low-pressure system in a region of the North Atlantic in which such systems occur so frequently that the average atmospheric pressure is low. Any one of these systems may be called ‘an Iceland low’, but the term is used mostly to describe the general statistical or climatic feature.