Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'mesolow'?

A. A point of maximum decrease in atmospheric pressure over a specified interval of time; on synoptic charts, a point of greatest negative pressure tendency; opposed to a pressure- rise center.
B. A seasonal low found over a continent in the summer and over the adjacent sea in the winter. Examples are the lows over the southwestern US and India in summer and those located off lower California and in the Bay of Bengal in winter. Palmer (1951) points out that, while the winter and summer monsoon lows appear similar on mean charts, they are dynamically quite different. Compare thermal low.
C. A cold low that has grown out of a trough and become displaced out of the basic westerly current and lies equatorward of this current.
D. A low pressure area on the mesoscale. It has been used to refer both to features observed within convective storms and features even larger in scale.

Answer: A low pressure area on the mesoscale. It has been used to refer both to features observed within convective storms and features even larger in scale.