They are defined within an analytic framework based on the semi-classical quantization of Poincaré map in action-angle variables.

Mean annual precipitation (MAP) decreases from 200 mm in the southeast to 15 mm in the northwest. In addition to some part of the southern flank of the Eastern Qilian Mountains drained by the ...

Chief Meteorologist Brad Panovich from our sibling station, WCNC, in Charlotte, North Carolina, assembled each of the pictures to construct a full-scale interactive map of the tornado's entire ...