An area of low pressure and temperature in the middle troposphere. These lows don't appear on synoptic charts, but are important in Arctic and Antarctic meteorology (Serreze et al. (1989) Meteor. & Atmos. Phys. 51, 3–4). Cut-off low systems are synoptic-scale low pressure systems, formed as a result of meridional shifts of jet streams in the upper troposphere, and playing a role in exchanges between troposphere and stratosphere (Gimeno et al. (2007) Met. Atmos. Phys. 96).
Subjects: Earth Sciences and Geography — Ecology and Conservation.